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1

PHYSICAL AND CHEMICAL CHANGES OF PINK SHRIMP, PANDALUS BOREALIS, HELD IN CARBON DIOXIDE MODIFIED REFRIGERATED  

E-print Network

PHYSICAL AND CHEMICAL CHANGES OF PINK SHRIMP, PANDALUS BOREALIS, HELD IN CARBON DIOXIDE MODIFIED ahrimp,PandaluB borealis, were held in carbon dioxide modified refrigerated seawater for 12.5 days and in ice for 11.5 days. Chemical tests for spoilage indicated that shrimp held in carbon dioxide modified

2

Effects of Ocean Acidification on Early Life Stages of Shrimp (Pandalus borealis) and Mussel (Mytilus edulis)  

Microsoft Academic Search

Ocean acidification (OA) resulting from anthropogenic emissions of carbon dioxide (CO2) has already lowered and is predicted to further lower surface ocean pH. There is a particular need to study effects of OA on organisms living in cold-water environments due to the higher solubility of CO2 at lower temperatures. Mussel larvae (Mytilus edulis) and shrimp larvae (Pandalus borealis) were kept

Renée Katrin Bechmann; Ingrid Christina Taban; Stig Westerlund; Brit Fjone Godal; Maj Arnberg; Sjur Vingen; Anna Ingvarsdottir; Thierry Baussant

2011-01-01

3

Molecular and enzymatic properties of a cathepsin L-like proteinase with distinct substrate specificity from northern shrimp ( Pandalus borealis )  

Microsoft Academic Search

We purified a cathepsin L-like proteinase to homogeneity from the hepatopancreas of northern shrimp Pandalus borealis by several chromatographic procedures. The purified proteinase showed the highest specificity for leucine residue at P2, a specificity pattern similar to cathepsins S and K whereas proline and arginine residues were not suitable as P2 substrates. However, unlike these proteinases, it accepted valine almost

H. Aoki; M. N. Ahsan; S. Watabe

2004-01-01

4

Egg survival, embryonic development, and larval characteristics of northern shrimp ( Pandalus borealis ) females subject to different temperature and feeding conditions  

Microsoft Academic Search

Laboratory experiments on ovigerous females of northern shrimp (Pandalus borealis) were used to assess the effects of temperature and food ration on female condition during incubation and examine how combined effects of temperature and female condition influenced egg survival, embryonic development, and larval characteristics. Ovigerous females were maintained at 2°C, 5°C, and 8°C and fed on a low (three times\\/week;

Sophie Brillon; Yvan Lambert; Julian Dodson

2005-01-01

5

Size and temperature-dependent variations in intermolt duration and size increment at molt of Northern Shrimp, Pandalus borealis  

Microsoft Academic Search

Growth of Pandalus borealis post-larval stages was measured in relation to size and temperature. Growth characteristics, including intermolt period (IP),\\u000a molt increment (MI) in size and mass, and tissue allocation in juvenile, male, and female shrimp, were evaluated at 2, 5,\\u000a and 8°C, the temperature range where this species is generally found in the Northwest Atlantic. Significant variations in\\u000a growth

Dounia Daoud; Yvan Lambert; Céline Audet; Denis Chabot

2010-01-01

6

The northern shrimp (Pandalus borealis) offshore fishery in the Northeast Atlantic.  

PubMed

This chapter describes the development and current situation of the offshore shrimp fisheries in Iceland, Greenland, Svalbard, Jan Mayen and the Norwegian Barents Sea area, with information on the biology of Pandalus borealis and its relation to the environment. Some additional information about the inshore shrimp fisheries of Iceland and Greenland of relevance to this study is also included. The Icelandic offshore shrimp fishery started in 1975 and has formed between 68% and 94% of the annual catch of shrimp since 1984. Landings peaked at 66,000 tons in 1997. The offshore fleet increased threefold from 1983 to 1987, and catch per unit of effort doubled. The first signs of overfishing were detected in 1987, when the first total allowable catch (TAC) was set, and catches decreased during the next few years despite the discovery of new fishing grounds. Good recruitment allowed catches to rise steadily from 1990 to 1996. However, catches and stock index have decreased markedly since then, with a minimum catch for the period 1998-2003 of 21,500 tons in 2000. It has been suggested that predation by cod is an important factor affecting shrimp stock size, but mortality from predation is slightly lower than fishing mortality, so that the impact of fishing cannot be disregarded. The Greenland offshore shrimp fishery is one of the largest in the North Atlantic and it generates 90% of the export value of the country. The fishery started in 1970 in West Greenland with landings of 1200 tons, but since 1974 it has formed between 59% and 89% of the annual shrimp catch. In 2004, landings reached 113,000 tons and the fishable stock was estimated at 300,000 tons. The significant spatial expansion of the fishery from the original fishing grounds off the Disko Island area to all of the West coast south of 75 degrees N and the fleet improvement over the past three decades have made possible this spectacular growth. Other fishing grounds off the East coast have been fished since 1978, mostly by foreign vessels. Catches in this area oscillated between 5000 and 15,000 tons during the period 1980-2004. The main problem of the shrimp fishery in Greenland is its overlapping with nursery areas of redfish, Greenland halibut, cod and other groundfish species, some of which show declining trends of biomass and abundance. This led to the implementation in 2000 of sorting grids and laws that forbid fishing when the bycatch exceeds legal limits. However, it is likely that ecological processes only partially understood, such as the trophic web and hydrography of the area, greatly influence the stock abundance of the demersal community. The offshore Norwegian fishery started in 1973. The main fishing grounds are off Svalbard and in the Barents Sea. Catches at Jan Mayen have never exceeded 5% of the total annual catch of northern shrimp. Large fluctuations in catches and stock size are the main characteristic of this fishery. Stock size seems to be largely dependent on the annual hydrographic variability in the area and trends in abundance of predator species, especially cod. However, shrimp mortality due to predation has been estimated to be the same as fishing mortality, and therefore fishing probably accounts for part of the observed variability in stock size. Large populations of juvenile cod, haddock, redfish and Greenland halibut are often found on the shrimp fishing grounds. The implementation of sorting grids in 1991 and a bio-economical model in 1993 to estimate allowable maximum catches of the commercial bycatch species have not solved the bycatch problem. All the commercial fish species present on the shrimp grounds are currently below safe biological limits. This is the only fishery within the studied area that is not regulated by means of a TAC system. PMID:17298891

Garcia, Elena Guijarro

2007-01-01

7

Species identification of the Northern shrimp (Pandalus borealis) by polymerase chain reaction-restriction fragment length polymorphism and proteomic analysis.  

PubMed

Genomic and proteomic techniques for species identification of meat and seafood products are being widely used. In this study, a genomic approach was used to differentiate Pandalus borealis (the Northern shrimp), which belongs to the superfamily Pandaloidea, from 30 crustaceans consisting of 19 commercially relevant prawns/shrimps species that belong to the superfamily Penaeoidea, which include the families Penaeidae and Solenoceridae, and 11 other crustacean species, including prawns, shrimps, lobsters, and crabs. For this purpose, a polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method was designed based on the amplification of the 16S rRNA/tRNA(Val)/12S rRNA mitochondrial regions using the primers 16S-CruF and 16S-CruR. The 966-bp PCR products were produced and cleaved with the restriction enzymes AluI, TaqI, and HinfI, which provided species-specific restriction patterns. In addition, a proteomic approach, based on matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) and electrospray ionization-ion trap (ESI-IT) mass spectrometry, was used to identify and characterize new P. borealis-specific peptides that could be useful as potential markers of this species in protein-based detection methods. To our knowledge, this is the first time a molecular method has been successfully applied to identify a wide range of prawn and shrimp species, including P. borealis, for either whole individuals or processed products. However, validation of the methods proposed here is required by applying them to a larger sample of individuals from different populations and geographic origins in order to avoid mainly false-negative results. PMID:22080038

Pascoal, Ananias; Ortea, Ignacio; Gallardo, José M; Cañas, Benito; Barros-Velázquez, Jorge; Calo-Mata, Pilar

2012-02-01

8

Genetically distinct populations of northern shrimp, Pandalus borealis, in the North Atlantic: adaptation to different temperatures as an isolation factor.  

PubMed

The large-scale population genetic structure of northern shrimp, Pandalus borealis, was investigated over the species' range in the North Atlantic, identifying multiple genetically distinct groups. Genetic divergence among sample localities varied among 10 microsatellite loci (range: FST  = -0.0002 to 0.0475) with a highly significant average (FST  = 0.0149; P < 0.0001). In contrast, little or no genetic differences were observed among temporal replicates from the same localities (FST  = 0.0004; P = 0.33). Spatial genetic patterns were compared to geographic distances, patterns of larval drift obtained through oceanographic modelling, and temperature differences, within a multiple linear regression framework. The best-fit model included all three factors and explained approximately 29% of all spatial genetic divergence. However, geographic distance and larval drift alone had only minor effects (2.5-4.7%) on large-scale genetic differentiation patterns, whereas bottom temperature differences explained most (26%). Larval drift was found to promote genetic homogeneity in parts of the study area with strong currents, but appeared ineffective across large temperature gradients. These findings highlight the breakdown of gene flow in a species with a long pelagic larval phase (up to 3 months) and indicate a role for local adaptation to temperature conditions in promoting evolutionary diversification and speciation in the marine environment. PMID:25782085

Jorde, Per Erik; Søvik, Guldborg; Westgaard, Jon-Ivar; Albretsen, Jon; André, Carl; Hvingel, Carsten; Johansen, Torild; Sandvik, Anne Dagrun; Kingsley, Michael; Jørstad, Knut Eirik

2015-04-01

9

The Enzyme and the cDNA Sequence of a Thermolabile and Double-Strand Specific DNase from Northern Shrimps (Pandalus borealis)  

PubMed Central

Background We have previously isolated a thermolabile nuclease specific for double-stranded DNA from industrial processing water of Northern shrimps (Pandalus borealis) and developed an application of the enzyme in removal of contaminating DNA in PCR-related technologies. Methodology/Principal Findings A 43 kDa nuclease with a high specific activity of hydrolysing linear as well as circular forms of DNA was purified from hepatopancreas of Northern shrimp (Pandalus borealis). The enzyme displayed a substrate preference that was shifted from exclusively double-stranded DNA in the presence of magnesium to also encompass significant activity against single-stranded DNA when calcium was added. No activity against RNA was detected. Although originating from a cold-environment animal, the shrimp DNase has only minor low-temperature activity. Still, the enzyme was irreversibly inactivated by moderate heating with a half-life of 1 min at 65°C. The purified protein was partly sequenced and derived oligonucleotides were used to prime amplification of the encoding cDNA. This cDNA sequence revealed an open reading frame encoding a 404 amino acid protein containing a signal peptide. By sequence similarity the enzyme is predicted to belong to a family of DNA/RNA non-specific nucleases even though this shrimp DNase lacks RNase activity and is highly double-strand specific in some respects. These features are in agreement with those previously established for endonucleases classified as similar to the Kamchatka crab duplex-specific nuclease (Par_DSN). Sequence comparisons and phylogenetic analyses confirmed that the Northern shrimp nuclease resembles the Par_DSN-like nucleases and displays a more distant relationship to the Serratia family of nucleases. Conclusions/Significance The shrimp nuclease contains enzyme activity that may be controlled by temperature or buffer compositions. The double-stranded DNA specificity, as well as the thermolabile feature, strengthens its potential for in vitro applications. PMID:20421970

Nilsen, Inge W.; Øverbø, Kersti; Jensen Havdalen, Linda; Elde, Morten; Gjellesvik, Dag Rune; Lanes, Olav

2010-01-01

10

Catch, survey and life-history data for shrimp ( Pandalus borealis) off Jan Mayen  

NASA Astrophysics Data System (ADS)

The Jan Mayen area has an extreme environment with low temperatures and infrequent, but abrupt temperature changes. The shrimp population here is considered to be on its edge of distribution. The life-history parameters are in the same range as in other high-latitude shrimp populations and are characterized by slow growth, large size at maturation and extended longevity. Irregular and sporadic commercial exploitation limit fishing mortality and give the population life-history parameters not previously seen in other areas. The Jan Mayen shrimp are large compared to, e.g., the Barents Sea shrimp and can reach a maximum carapace length ( Lmax) of 37 mm and an age of 10-11 years. The large size at sex transformation ( L50, >24 mm) and analyses of length-frequency distributions indicate that the shrimp may be 6-7 years of age before changing sex. The change in Lmax and L50 observed during the study period is probably caused by increased natural mortality due to sudden temperature changes or due to increased predation, rather than increased growth rates. The life-history strategy of shrimp in the Jan Mayen area can be explained by factors such as depth, temperature and population density variations caused by fluctuation in recruitment and mortality. The shrimp fisheries in the Jan Mayen area began in the late 1970s and reached an annual landing of 2000 tonnes in 1985, and since then landings have oscillated around 500 tonnes depending on a combination of factors. The survey indices of stock biomass varied between 3000 and 6600 tonnes. For most years, the highest shrimp densities are at a depth of 200-299 m, while large shrimp (and therefore also female shrimp) are dominant at depths greater than 300 m. Fish community data were studied as the composition of the demersal fish community is an integrated response to environmental conditions and as predation affects the shrimp stock. Polar cod and capelin are the most abundant fish species in the study area. A high number of blue whiting was registered in 1979, but the number declined in 1980 and 1981 as temperature decreased. During the surveys in 1994 and 1995, no blue whiting was registered. A few individuals were found again in the 1999 samples. The number of Greenland halibut has declined from the beginning of the 1980s to the 1990s.

Nilssen, Einar M.; Aschan, Michaela M.

2009-10-01

11

Changes in antioxidative capacity of saithe (Pollachius virens) and shrimp (Pandalus borealis) during in vitro digestion.  

PubMed

The health effects of seafood have primarily been linked to eicosapentaenoic acid (EPA; 20:5n-3) and docosahexaenoic acid (DHA; 22:6n-3). These omega-3 fatty acids are highly susceptible to oxidation. Peptides exhibiting antioxidative capacity (AOC) are encrypted in seafood muscle proteins. Such components may protect the fatty acids during digestion and uptake, as well as exhibit antioxidative effects in general. The oxygen radical absorbance capacity (ORAC) assay and the ferric reducing antioxidant power (FRAP) assay were used to study the changes in AOC of fish and shrimp muscle and their aqueous fractions, referred to as press juice (PJ), during a simulated in vitro gastrointestinal (GI) digestion. Blueberry (Vaccinium myrtillus), well-known for its AOC, was included for comparison. During digestion the AOC increased in all samples. After digestion the AOC of muscle of both autumn saithe and shrimp were higher (130-165 micromol/g), and winter saithe comparable (110 micromol/g) to digested blueberry when measured by ORAC. The AOC of PJ was low in general (5-20 micromol/g). When measured by FRAP, blueberry exhibited ten times the AOC of seafood muscle. Antioxidative compounds in seafood increased significantly during digestion, and may offer protection of other beneficial food components such as EPA and DHA. PMID:19845349

Jensen, Ida-Johanne; Abrahamsen, Hogne; Maehre, Hanne K; Elvevoll, Edel O

2009-11-25

12

[Quality changes in iced shrimps (Pandalus borealis). II Changes in the contents of trimethylamine oxide and volatile nitrogen bases during automatic boiling and peeling (author's transl)].  

PubMed

Post mortem trimethylamine oxide (TMAO) in marine animals is reduced to trimethylamine (TMA), and the degradation of proteins causes an increase in the ammonia (NH3) content. During ice-storage NH3 and TMA usually make up the major part of the total content of volatile nitrogen bases (TVN) which are formed during the degradation process. The formation of TMA and NH3 is probably caused mainly by bacterial enzymes. The contents of TMA and TVN in marine fish and shrimps are important objective criteria in supporting organoleptic examinations of such raw materials. During automatic boiling, peeling and rinsing processes in shrimp factories, some of these water-soluble and volatile compounds will be extracted by the boiling water and possibly evaporated. In this investigation we have attempted to estimate the loss of TMAO, TMA and TVN in shrimp muscle during this automatic processing. The investigation includes experiments in the laboratory (Table I, Figure 1) and in two factories (Table II-III, Figure 2-3). The results show that about 50% of the contents of TMAO-N, TMA-N and TVN probably will be lost from the shrimps during automatic processing. Adding approximately 100% TMA-N and TVN to the analysed contents in boiled, peeled and rinsed shrimps will therefore probably give the same level of these compounds as that found in the raw shrimps used. An accurate measurement of the TMA- and TVN-content in shrimp produced under known condition in North-Norwegian shrimps factories could give an objective indication of the quality of the raw shrimps used. In accordance with Norwegian shrimp regulations, only the fresh, healthy shrimps are allowed to be produced. PMID:7322865

Solberg, T; Nesbakken, T

1981-01-01

13

An investigation into mechanical strength of exoskeleton of hydrothermal vent shrimp (Rimicaris exoculata) and shallow water shrimp (Pandalus platyceros) at elevated temperatures.  

PubMed

This investigation reports a comparison of the exoskeleton mechanical strength of deep sea shrimp species Rimicaris exoculata and shallow water shrimp species Pandalus platyceros at temperatures ranging from 25°C to 80°C using nanoindentation experiments. Scanning Electron Microscopy (SEM) observations suggest that both shrimp exoskeletons have the Bouligand structure. Differences in the structural arrangement and chemical composition of both shrimps are highlighted by SEM and EDX (Energy Dispersive X-ray) analyses. The variation in the elastic moduli with temperature is found to be correlated with the measured compositional differences. The reduced modulus of R. exoculata is 8.26±0.89GPa at 25°C that reduces to 7.61±0.65GPa at 80°C. The corresponding decrease in the reduced modulus of P. platyceros is from 27.38±2.3GPa at 25°C to 24.58±1.71GPa at 80°C. The decrease in reduced moduli as a function of temperature is found to be dependent on the extent of calcium based minerals in exoskeleton of both types of shrimp exoskeletons. PMID:25686945

Verma, Devendra; Tomar, Vikas

2015-04-01

14

DIET OF PACIFIC COD, GADUS MACROCEPHALUS, AND PREDATION ON THE NORTHERN PINK SHRIMp,  

E-print Network

DIET OF PACIFIC COD, GADUS MACROCEPHALUS, AND PREDATION ON THE NORTHERN PINK SHRIMp, PANDALUS BOREALIS, IN PAVLOF BAY, ALASKA W. D. ALBERS AND P. J. ANDERSON! ABSTRACf Analysis of 455 Pacific cod more frequently with increasing cod size (30-69 cm fork length). Euphausids decreased in frequency

15

FECUNDITY OF NORTHERN SHRIMp, PANDALUS BOREALIS, (CRUSTACEA, DECAPODA) IN AREAS OF  

E-print Network

.1 mm using Vernier calipers. This measurement is the distance between the posterior margin of the orbit of the eye and the posterodorsal margin of the carapace (Rasmussen 1953). All eggs were removed from

16

An investigation into environment dependent nanomechanical properties of shallow water shrimp (Pandalus platyceros) exoskeleton.  

PubMed

The present investigation focuses on understanding the influence of change from wet to dry environment on nanomechanical properties of shallow water shrimp exoskeleton. Scanning Electron Microscopy (SEM) based measurements suggest that the shrimp exoskeleton has Bouligand structure, a key characteristic of the crustaceans. As expected, wet samples are found to be softer than dry samples. Reduced modulus values of dry samples are found to be 24.90 ± 1.14 GPa as compared to the corresponding values of 3.79 ± 0.69 GPa in the case of wet samples. Hardness values are found to be 0.86 ± 0.06 GPa in the case of dry samples as compared to the corresponding values of 0.17 ± 0.02 GPa in the case of wet samples. In order to simulate the influence of underwater pressure on the exoskeleton strength, constant load creep experiments as a function of wet and dry environments are performed. The switch in deformation mechanism as a function of environment is explained based on the role played by water molecules in assisting interface slip and increased ductility of matrix material in wet environment in comparison to the dry environment. PMID:25280717

Verma, Devendra; Tomar, Vikas

2014-11-01

17

META-ANALYSIS OF COD–SHRIMP INTERACTIONS REVEALS TOP-DOWN CONTROL IN OCEANIC FOOD WEBS  

Microsoft Academic Search

Here we present a meta-analytic approach to analyzing population interac- tions across the North Atlantic Ocean. We assembled all available biomass time series for a well-documented predator-prey couple, Atlantic cod (Gadus morhua) and northern shrimp (Pandalus borealis), to test whether the temporal dynamics of these populations are con- sistent with the ''top-down'' or the ''bottom-up'' hypothesis. Eight out of nine

Boris Worm; Ransom A. Myers

2003-01-01

18

Molecular characterization of a cDNA encoding vitellogenin in the coonstriped shrimp, Pandalus hypsinotus and site of vitellogenin mRNA expression.  

PubMed

In order to determine the primary structure of vitellogenin in a protandric species, the coonstriped shrimp Pandalus hypsinotus, we previously purified four vitellin components (designated as VnA, VnB, VnC, and VnD, respectively), and chemically analyzed their partial amino acid sequences. In this study, we subsequently cloned a cDNA encoding vitellogenin in this species based on the N-terminal and internal amino acid sequences of VnA, as well as the N-terminal sequence of VnC. The open reading frame of this cDNA encoded a pro-vitellogenin in which vitellins were arranged as follows: NH2-VnA-VnB-VnC/D-COOH. The deduced amino acid sequence possessed a single consensus cleavage sequence, R-X-K/R-R, along the lines of vitellogenins reported in other crustaceans and insects, and the N-terminal sequence of VnB was immediately preceded by this sequence. The comparison of primary structures revealed the existence of a basic and characteristic structure for the vitellogenin molecule in decapod crustacean species, and phylogenetic analysis reflected the current taxonomic classifications of Crustacea. An approximately 8 kb-long transcript of the vitellogenin gene was detected in the hepatopancreas of female shrimps having a gonadosomatic index higher than 1.0 by Northern blot analysis, but was not observed in the hepatopancreas and gonads of male shrimps and the hepatopancreas of female shrimps having a gonadosomatic index lower than 1.0. These results indicate that the hepatopancreas is responsible for vitellogenin synthesis. PMID:15449343

Tsutsui, Naoaki; Saido-Sakanaka, Hisako; Yang, Wei-Jun; Jayasankar, Vidya; Jasmani, Safiah; Okuno, Atsuro; Ohira, Tsuyoshi; Okumura, Takuji; Aida, Katsumi; Wilder, Marcy N

2004-10-01

19

Expression Profiling without Genome Sequence Information in a Non-Model Species, Pandalid Shrimp (Pandalus latirostris), by Next-Generation Sequencing  

PubMed Central

While the study of phenotypic variation is a central theme in evolutionary biology, the genetic approaches available to understanding this variation are usually limited because of a lack of genomic information in non-model organisms. This study explored the utility of next-generation sequencing (NGS) technologies for studying phenotypic variations between 2 populations of a non-model species, the Hokkai shrimp (Pandalus latirostris; Decapoda, Pandalidae). Before we performed transcriptome analyses using NGS, we examined the genetic and phenotypic differentiation between the populations. Analyses using microsatellite DNA markers suggested that these populations genetically differed from one another and that gene flow is restricted between them. Moreover, the results of our 4-year field observations indicated that the egg traits varied genetically between the populations. Using mRNA extracted from the ovaries of 5 females in each population of Hokkai shrimp, we then performed a transcriptome analysis of the 2 populations. A total of 13.66 gigabases (Gb) of 75-bp reads was obtained. Further, 58,804 and 33,548 contigs for the first and second population, respectively, and 47,467 contigs for both populations were produced by de novo assembly. We detected 552 sequences with the former approach and 702 sequences with the later one; both sets of sequences showed greater than twofold differences in the expression levels between the 2 populations. Twenty-nine sequences were found in both approaches and were considered to be differentially expressed genes. Among them, 9 sequences showed significant similarity to functional genes. The present study showed a de novo assembly approach for the transcriptome of a non-model species using only short-read sequence data, and provides a strategy for identifying sequences showing significantly different expression levels between populations. PMID:22016807

Kawahara-Miki, Ryouka; Wada, Kenta; Azuma, Noriko; Chiba, Susumu

2011-01-01

20

New evidence for the presence of arsenocholine in shrimps (Pandalus borelais) by use of pyrolysis gas chromatography: atomic absorption spectrometry\\/mass spectrometry  

Microsoft Academic Search

An analytical method for the structure elucidation of quarternary organoarsenic compounds in trace amounts in fish and crustaceans has been developed in this laboratory. The two major organoarsenicals found in shrimps have been separated by ion-exchange chromatography and their structure has been studied by the use of pyrolysis gas chromatography. Their degradation in the pyrolyzer unit has been studied by

H. Norin; R. Ryhage; A. Christakopoulos; M. Sandstroem

1983-01-01

21

Validation of the name Wolffia borealis (Lemnaceae)  

Technology Transfer Automated Retrieval System (TEKTRAN)

Problems with the valid publication of the species name Wolffia borealis, thought to have been published in 1977 for a duckweed from the United States and Canada, are discussed. The varietal name upon which W. borealis was presumably based, “W. brasiliensis var. borealis Engelm.”, did not exist in ...

22

Matrix-assisted laser desorption ionization mass spectrometry for identification of shrimp.  

PubMed

Matrix-assisted laser desorption ionization (MALDI) time of flight mass spectrometry was used to identify shrimp at the species level using commercial mass spectral fingerprint matching software (Bruker Biotyper). In the first step, a mass spectrum reference database was constructed from the analysis of six commercially important shrimp species: Litopenaeus setiferus, Farfantepenaeus aztecus, Sicyonia brevirostris, Pleoticus robustus, Pandalopsis dispar and Pandalus platyceros. This step required a desalting procedure for optimum performance. In the second step, the reference database was tested using 74 unknown shrimp samples from these six species. Correct identification was achieved for 72 of 74 samples (97%): 72 samples were identified at the species level and 2 samples were identified at the genus level using the manufacturer's log score specifications. The MALDI fingerprinting method for the identification of shrimp species was found to be reproducible and accurate with rapid analysis. PMID:23972975

Salla, Venkatesulu; Murray, Kermit K

2013-09-10

23

Aurora Borealis: What Causes the Northern Lights?  

NSDL National Science Digital Library

This color brochure answers common questions about the aurora borealis, including its cause, as well as explanations of its colors, shapes, and location. It also lists resources for further study. The brochure may be downloaded in PDF format.

24

Secretagogues and Growth Factors in Fish and Crustacean Protein Hydrolysates  

Microsoft Academic Search

:   The search for new molecules in fish protein hydrolysates is of great interest in animal feeding as it is in aquaculture,\\u000a fertilizer, cosmetic, and pharmacologic domains. Different sources of hydrolysates such as shrimp waste (Pandalus borealis), cod (Gadus morhua) head, and head and viscera of sardine (Sardina pilchardus), obtained after hydrolysis or autolysis, were tested on fibroblast cell cultures

Isabelle Cancre; Rozenn Ravallec; Alain Van Wormhoudt; Even Stenberg; Asbjoern Gildberg; Yves Le Gal

1999-01-01

25

Punching Shrimp  

NSDL National Science Digital Library

Legendary boxer Muhammad Ali used to brag that he could "float like a butterfly and sting like a bee." But to be a true champion, a prizefighter should really try to "punch like a mantis shrimp." This Science Update examines the research behind copying this mechanism for application to machinery design.

Science Update

2004-06-28

26

Exxon Valdez oil spill. State/federal natural resource damage assessment. Injury to Prince William Sound spot shrimp. Subtidal study number 5. Final report  

SciTech Connect

Since the grounding of the T/V Exxon Valdez caused an oil spill on March 24, 1989, four surveys have been conducted by the Alaska Department of Fish and Game (ADF&G) to assess possible damage done by the oil spill to spot shrimp Pandalus platyceros. The surveys were conducted November 1989, March 1990, and November 1990 as Fish/Shellfish Study 15, then November 1991 as Subtidal Study 5. The report incorporates results of all surveys, but emphasizes November surveys and their analysis.

NONE

1992-12-01

27

The hybrid origin of the polyploid liverwort Pellia borealis  

Microsoft Academic Search

Isozyme markers were used to investigate the origin of the polyploid liverwort, Pellia borealis (gametophytic n=18), which was believed to represent an autopolyploid form of Pellia epiphylla (n=9). Enzyme variation was studied in four taxa: polyploid P. borealis, two recently discovered sibling species of P. epiphylla complex, and the closely related P. neesiana (n=9). Gametophytes of the polyploid showed a

Ireneusz J. Odrzykoski; Ewa Chudzifiska; Jerzy Szweykowski

1996-01-01

28

Zinc uptake and regulation by the sublittoral prawn Pandalus montagui (Crustacea: Decapoda)  

NASA Astrophysics Data System (ADS)

The sublittoral decapod crustacean Pandalus montagui Leach in artificial seawater at 10°C regulates the total body zinc concentration to a constant level in dissolved zinc concentrations up to ca. 22 ?g Zn l -1, beyond which there is net accumulation of body zinc. This threshold of zinc regulation breakdown is lower than that in the littoral decapods Palaemon elegans (ca. 93 ?g Zn l -1) and Palaemonetes varians (ca. 190 ?g Zn l -1) under the same physico-chemical conditions. Correspondingly, zinc uptake rates of the three species of decapods decrease in the order P. montagui > P. elegans > P. varians. It is concluded that regulation of total body zinc concentration is more efficient in decapods adapted to the fluctuating environments of littoral habitats, possibly as a result of changes in permeability of uptake surfaces in combination with improved zinc excretion systems. The moult cycle is important in determining the ability of an individual prawn to regulate zinc. Body zinc in Pandalus montagui consists of at least two pools of zinc exchanging at different rates which the environment. Zinc and copper are not evenly distributed in the tissues of P. montagui.

Nugegoda, D.; Rainbow, P. S.

1988-06-01

29

Fluorine in R Coronae Borealis Stars  

E-print Network

Neutral fluorine (F I) lines are identified in the optical spectra of several R Coronae Borealis stars (RCBs) at maximum light. These lines provide the first measurement of the fluorine abundance in these stars. Fluorine is enriched in some RCBs by factors of 800 to 8000 relative to its likely initial abundance. The overabundances of fluorine are evidence for the synthesis of fluorine. These results are discussed in the light of the scenario that RCBs are formed by accretion of an He white dwarf by a C-O white dwarf. Sakurai's object (V4334 Sgr), a final He-shell flash product, shows no detectable F I lines.

Gajendra Pandey; David L. Lambert; N. Kameswara Rao

2007-11-15

30

SHRIMPS (ARTHROPODA: CRUSTACEA: PENAEIDAE)  

EPA Science Inventory

The pollution ecology of penaeid shrimps involving industrial organic chemicals, pesticides, petroleum, heavy metals, biological agents, and interactions of the above is discussed. Penaeid shrimps, within their geographic distribution, can serve as valid indicators of the presenc...

31

Diapause traits in Melanoplus sanguinipes and M. borealis (Orthoptera: Acrididae)  

Technology Transfer Automated Retrieval System (TEKTRAN)

A thorough understanding of diapause is needed for prediction of population responses to climate change, for realistic simulation models, and for the development of effective pest management. In Melanoplus sanguinipes (Fabricius) and M. borealis (Fieber) (Orthoptera: Acrididae), diapause typically o...

32

The Design of the Borealis Stream Processing Engine  

Microsoft Academic Search

Borealis is a second-generation distributed stream pro- cessing engine that is being developed at Brandeis Uni- versity, Brown University, and MIT. Borealis inherits core stream processing functionality from Aurora (14) and distribution functionality from Medusa (51). Bo- realis modifies and extends both systems in non-trivial and critical ways to provide advanced capabilities that are commonly required by newly-emerging stream pro-

Daniel J. Abadi; Yanif Ahmad; Magdalena Balazinska; Ugur Çetintemel; Mitch Cherniack; Jeong-hyon Hwang; Wolfgang Lindner; Anurag Maskey; Alex Rasin; Esther Ryvkina; Nesime Tatbul; Ying Xing

2005-01-01

33

Shrimp Farming in the Classroom.  

ERIC Educational Resources Information Center

Describes a project on culturing shrimp. Presents observational labs and the experimentation procedure. Provides general information about shrimp, their life span, optimum temperatures, and other important information. (YDS)

Ruggiero, Lovelle

2000-01-01

34

CHARACTERIZATION OF SHRIMP BACULOVIRUS  

EPA Science Inventory

The research undertaken involved the partial characterization of a baculovirus of the pink shrimp, Penaeus duorarum. The significance of the study is related to the fact that the shrimp baculovirus is morphologically similar to insect vaculoviruses which were considered unique to...

35

Substratum preference of the caddisfly Helicopsyche borealis (Hagen) (Trichoptera: Helicopsychidae)  

Microsoft Academic Search

The position of Helicopsyche borealis (Hagen) (Trichoptera: Helicopsychidae) larvae on the substratum surface is dependent on the current regime but varies with larval size. All size classes of larvae chose significantly different positions on the substratum under high versus low current velocities. All size classes preferred exposed surfaces under low current velocities. Small larvae preferred the upper surfaces of substrata

Caryn C. Vaughn

1987-01-01

36

The Aurora and Borealis Stream Processing Ugur Cetintemel1  

E-print Network

The Aurora and Borealis Stream Processing Engines Ugur C¸etintemel1 , Daniel Abadi2 , Yanif Ahmad1 on an SPE. The Aurora stream-processing engine, motivated by these three tenets, is currently operational-shedding algorithms are presented in [18], and our approach to high availability in a multi-site Aurora installation

Balazinska, Magdalena

37

Aggregation pheromones in Drosophila borealis and Drosophila littoralis  

Microsoft Academic Search

Mature males ofDrosophila borealis andD. littoralis (Diptera: Drosophilidae) produce pheromones that attract both males and females in a wind-tunnel bioassay. Ethyl tiglate is a major pheromone component in both species. Isopropyl tiglate is a minor component, as active as ethyl tiglate on an equal-weight basis, but less abundant in the flies. Both species respond to (Z)-9-heneicosene, a compound they do

Robert J. Bartelt; Angela M. Schaner; Larry L. Jackson

1988-01-01

38

Shrimp Farming in the Classroom  

NSDL National Science Digital Library

In inquiry-based instruction, discovery and learning belong to the students. In this exploration, jumbo shrimp are the source of inspiration. The magic in this project lies not in successfully culturing these shrimp, known as Macrobrachium rosenbergii

Lovelle Ruggiero

2000-01-01

39

Socioeconomic impacts of shrimp culture  

Microsoft Academic Search

Farmed shrimp contributed 27% of total world shrimp production in 1995 with a volume of 712 000 tonnes. Undoubtedly, the shrimp culture industry earns valuable foreign exchange for developing countries and generates jobs across the industry from fry gatherers to growers and processors. However, grave socio-economic consequences -including conversion, expropriation and privatization of mangroves and other lands; salinization of water

J. H. Primavera

1997-01-01

40

Potential and realized rates of vegetative reproduction in Spirodela polyrhiza, Lemna minor, and Wolffia borealis  

Microsoft Academic Search

The rate of vegetative propagule development was estimated in three duckweed (Lemnaceae) species, Spirodela polyrhiza, Lemna minor, and Wolffia borealis, by measuring the number of daughter fronds produced over the life span of mother fronds. Under the same constant environmental conditions, plants of L. minor lived the longest (31.3 days) and produced the most daughter fronds (14.0), yet W. borealis

Gordon D. Lemon; Usher Posluszny; Brian C. Husband

2001-01-01

41

Host plant-mediated interactions between Tetranychus urticae and Eotetranychus carpini borealis (Acari: Tetranychidae).  

PubMed

Competitive interactions between Tetranychus urticae and Eotetranychus carpini borealis were investigated under laboratory and greenhouse conditions. When placed first to colonize red raspberry leaves, T. urticae caused extinction of E. carpini borealis populations. E. carpini borealis had detrimental effects on T. urticae but did not cause T. urticae population extinction. The area used by E. carpini borealis for egg deposition decreased with an increase in the number of T. urticae eggs. Red raspberry showed an induced response to T. urticae and E. carpini borealis feeding after two weeks of infestation. Population growth of each species was reduced on plants that were previously infested by conspecifics but inducible response by one species had no effects on the other species. PMID:11508526

Bounfour, M; Tanigoshi, L K

2001-01-01

42

Vision in hydrothermal vent shrimp.  

PubMed Central

Bresiliid shrimp from hydrothermal vents on the Mid-Atlantic Ridge have non-imaging eyes adapted for photodetection in light environments of very low intensity. Comparison of retinal structures between both vent shrimp and surface-dwelling shrimp with imaging eyes, and between juvenile and adult vent shrimp, suggests that vent shrimp have evolved from ancestors that lived in a light environment with bright cyclic lighting. Whether the vent shrimp live in swarms and have large dorsal eyes or live in sparse groupings and have large anterior eyes, the basic retinal adaptations are the same across species. Retinal adaptations in adult vent shrimp include the loss of dioptrics, enlargement of both the rhabdomeral segment of the photoreceptors and the light-sensitive rhabdomere therein, attenuation of the arhabdomeral segment of the photoreceptors, reduction of black screening pigment, development of a white diffusing layer behind the photoreceptors, and the loss of rhabdom turnover. PMID:11079388

Chamberlain, S C

2000-01-01

43

AURORA BOREALIS - European Research Icebreaker With Drilling Capability  

NASA Astrophysics Data System (ADS)

The polar oceans are the least known areas of the globe, in although they hold the key to many of our climate´s secrets. How does the sea ice coverage and the sea water properties change? How do plants and animals survive under the most extreme conditions of the earth? Which information of past climate change can be read from the sediments at the sea-floor and how can the future changing climate be predicted? In order to answer such and further questions, for the moment a hypermodern research vessel, the AURORA BOREALIS, is planned, which can handle the cool summers and freezing winters of the polar oceans and which can drill deep into the sea floor. AURORA BOREALIS will be the most advanced Research Icebreaker in the world with a multi-functional role of drilling in deep ocean basins and supporting climate/environmental research and decision support for stakeholder governments for the next 35-40 years. It will have a high icebreaking capacity to penetrate autonomously (single ship operation) into the central Arctic Ocean with more than 2.5 meters of ice cover, during all seasons of the year. The new technological features will include dynamic positioning in closed sea- ice cover, satellite navigation and ice-management support and the deployment and operation of Remotely Operated Vehicles (ROV) and Autonomous Underwater Vehicles (AUVs) from the twin moon-pools. A unique feature of the vessel is the deep-sea drilling rig, which will enable sampling of the ocean floor and sub-sea up to 5000 m water and 1000 m penetration at the most inhospitable places on earth. The drilling capability will be deployed in both Polar Regions on the long run and AURORA BOREALIS will be the only vessel worldwide that could undertake this type of scientific investigation.

Biebow, N.; Lembke-Jene, L.; Kunz-Pirrung, M.; Thiede, J.

2008-12-01

44

Color Control in Shrimp  

NSDL National Science Digital Library

This resource is a detailed manual for instructing a laboratory exercise in invertebrate marine physiology. Students investigate the environmental and physiological causes of color change in shrimp. This exercise is suitable for introductory animal or invertebrate physiology courses, and could be adapted further to explore the ecological consquences of color change.

Mary-Jane O'Halloran (Dalhousie University; )

1990-01-01

45

Optical Spectroscopy at Deep Light Minimum of R Coronae Borealis  

NASA Astrophysics Data System (ADS)

We present optical spectroscopy late in a deep minimum for the quintessential hydrogen-deficient carbon star R Coronae Borealis. Starting 3.5 years into the current deep and long minimum, we have secured observations that reveal some of the oddest optical spectra ever obtained for any astronomical object. Helium emission lines from triplet transitions, strong Ca II H and K emission, and forbidden lines of oxygen and nitrogen are the only spectral features observed. The spectra can be interpreted as coming from a chromospheric-like region lying above a carbon shell ejection front combined with a large-scale nebular-like region surrounding the star.

Howell, Steve B.; Rector, Travis A.; Walter, Donald

2013-08-01

46

Fluorine in R Coronae Borealis and Extreme Helium Stars  

E-print Network

Neutral fluorine lines are identified in the optical spectra of several R Coronae Borealis stars (RCBs) at maximum light. These lines provide the first measurement of the fluorine abundance in these stars. Fluorine is enriched in some RCBs by factors of 800 to 8000 relative to its likely initial abundance. The overabundances of fluorine are evidence for the synthesis of fluorine. These results are discussed in the light of the scenario that RCBs are formed by accretion of an He white dwarf by a C-O white dwarf. Sakurai's object (V4334 Sgr), a final He-shell flash product, shows no detectable neutral fluorine lines.

Gajendra Pandey; David L. Lambert; N. Kameswara Rao

2007-12-24

47

Color Control in Shrimp  

NSDL National Science Digital Library

Sand shrimp, Crangon septemspinosus, are capable of varying their color or shading in response to several environmental changes (background color, light intensity, light wavelength, and temperature). The degree of color change can be determined quantitatively by examining the chromatophores under a dissecting microscope and staging the amount of pigment dispersion, (b) the location or type of receptors involved, and (c) the type of communication between receptors and effectors.

Mary-Jane O'Halloran (Dalhousie University; )

1989-06-06

48

Topographic and Roughness Characteristics of the Vastitas Borealis Formation on Mars Described by Fractal Statistics  

NASA Technical Reports Server (NTRS)

The surface roughness of the Vastitas Borealis Formation on Mars was analyzed with fractal statistics. Root mean square slopes and fractal dimensions were calculated for 74 topographic profiles. Results have implications for radar scattering models.

Garneau, S.; Plaut, J. J.

2000-01-01

49

5. Aurora Borealis Pass over the United States at Night - Duration: 0:21.  

NASA Video Gallery

This video of the United States at night and the Aurora Borealis was taken by the crew of Expedition 29 on board the International Space Station. This sequence of shots was taken September 29, 2011...

50

Foreign Fishery Developments Japanese Frozen Shrimp  

E-print Network

of frozen shrimp in 1978 amounted to 143,962 t, a new all-time high surpassing by 15 percent the previousForeign Fishery Developments Japanese Frozen Shrimp Imports Continue to Climb Japanese imports. Japanese imports of frozen shrimp have increased remarkably since the liberalization of shrimp imports

51

Variable Winds and Dust Formation in R Coronae Borealis Stars  

NASA Astrophysics Data System (ADS)

We have observed P-Cygni and asymmetric, blue-shifted absorption profiles in the He I ?10830 lines of 12 R Coronae Borealis stars over short (1 month) and long (3 yr) timescales to look for variations linked to their dust-formation episodes. In almost all cases, the strengths and terminal velocities of the line vary significantly and are correlated with dust formation events. Strong absorption features with blue-shifted velocities ~400 km s-1 appear during declines in visible brightness and persist for about 100 days after recovery to maximum brightness. Small residual winds of somewhat lower velocity are present outside of the decline and recovery periods. The correlations support models in which recently formed dust near the star is propelled outward at high speed by radiation pressure and drags the gas along with it.

Clayton, Geoffrey C.; Geballe, T. R.; Zhang, Wanshu

2013-08-01

52

VARIABLE WINDS AND DUST FORMATION IN R CORONAE BOREALIS STARS  

SciTech Connect

We have observed P-Cygni and asymmetric, blue-shifted absorption profiles in the He I {lambda}10830 lines of 12 R Coronae Borealis stars over short (1 month) and long (3 yr) timescales to look for variations linked to their dust-formation episodes. In almost all cases, the strengths and terminal velocities of the line vary significantly and are correlated with dust formation events. Strong absorption features with blue-shifted velocities {approx}400 km s{sup -1} appear during declines in visible brightness and persist for about 100 days after recovery to maximum brightness. Small residual winds of somewhat lower velocity are present outside of the decline and recovery periods. The correlations support models in which recently formed dust near the star is propelled outward at high speed by radiation pressure and drags the gas along with it.

Clayton, Geoffrey C.; Zhang Wanshu [Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803 (United States); Geballe, T. R., E-mail: gclayton@fenway.phys.lsu.edu, E-mail: wzhan21@lsu.edu, E-mail: tgeballe@gemini.edu [Gemini Observatory, 670 N. A'ohoku Place, Hilo, HI 96720 (United States)

2013-08-01

53

Mid-infrared variations of R Coronae Borealis stars  

NASA Astrophysics Data System (ADS)

Mid-infrared (IR) photometry of R Coronae Borealis stars obtained from various satellites from Infrared Astronomical Satellite (IRAS) to Wide-field Infrared Survey Explorer (WISE) has been utilized in studying the variations of the circumstellar dust's contributions to the spectral energy distribution of these stars. The variation of the fractional coverage (R) of dust clouds and their blackbody temperatures (Td) have been used in trying to understand the dust cloud evolution over the three decades spanned by the satellite observations. In particular, it is shown that a prediction R ? T_d^4 developed in the paper is satisfied, especially by those stars for which a single collection of clouds dominates the IR fluxes.

Rao, N. Kameswara; Lambert, David L.

2015-03-01

54

Substrate Selection by Ghost Shrimp  

NSDL National Science Digital Library

The purpose of this experiment is to determine if ghost shrimp show a preference for a particular substrate surface under artificial conditions. Ghost shrimp are geographically widespread. They are an important source of food for many fish, mammals, and birds. Ghost shrimp are omnivorous, seldom predaceous. Their preferred food is aquatic vegetation. Ecologically, they are considered scavengers. Therefore, they contribute to an efficient flow of energy within aquatic habitats. Economically, they have become a favorite source of live food for aquarium fish and are sold in pet stores and are harvested for bait for sport fishing.

Ms. Sue Diggs (Monterey High School)

2000-07-01

55

AURORA BOREALIS: a polar-dedicated European Research Platform  

NASA Astrophysics Data System (ADS)

Polar research and in particular the properties of northern and southern high latitude oceans are currently a subject of intense scientific debate and investigations, because they are subject to rapid and dramatic climatic variations. Polar regions react more rapidly and intensively to global change than other regions of the earth. A shrinking of the Arctic sea-ice cover, potentially leading to an opening of sea passages to the north of North America and Eurasia, on the long to a "blue" Arctic Ocean would additionally have a strong impact on transport, commerce and tourism bearing potential risk for humans and complex ecosystems in the future. In spite of their critical role processes and feedbacks, especially in winter but not exclusively, are virtually unknown: The Arctic Ocean for example, it is the only basin of the world's oceans that has essentially not been sampled by the drill ships of the Deep-Sea Drilling Project (DSDP) or the Ocean Drilling Program (ODP) and its long-term environmental history and tectonic structure is therefore poorly known. Exceptions are the ODP Leg 151 and the more recent very successful ACEX-expedition of the Integrated Ocean Drilling Program (IODP) in 2004. To help to address the most pressing questions regarding climate change and related processes, a Pan-European initiative in the field of Earth system science has been put in place: AURORA BOREALIS is the largest environmental research infrastructure on the ESFRI roadmap of the European Community. AURORA BOREALIS is a very powerful research icebreaker, which will enable year-round operations in the Arctic and the Antarctic as well as in the adjacent ocean basins. Equipped with its drilling rig, the vessel is also capable to explore the presently completely unknown Arctic deep-sea floor. Last but not least, the ship is a floating observatory and mobile monitoring platform that permits to measure on a long-term basis comprehensive time series in all research fields relevant to global climate change. Chances and challenges rest in securing the construction and operation costs that need a dedicated consortium of interested countries and institutions to help tackling the biggest challenges of the next decades.

Wolff-Boenisch, Bonnie; Egerton, Paul; Thiede, Joern; Roberto, Azzolini; Lembke-Jene, Lester

2010-05-01

56

Science Nation: Disappearing Red Shrimp  

NSDL National Science Digital Library

Along the shore in Hawaii, the ponds imbedded in lava rocks contain organisms found only in that environment. Among the marine life in these pools are hundreds of tiny red shrimp. With support from the National Science Foundation (NSF), molecular biologist Scott Santos and his team at Auburn University are studying how the shrimp, along with other organisms, thrive in harsh, brackish pools of water.

57

Sasa borealis extract exerts an antidiabetic effect via activation of the AMP-activated protein kinase  

PubMed Central

Leaf of Sasa borealis, a species of bamboo, has been reported to exhibit anti-hyperglycemic effect. However, its antidiabetic mechanism is not fully understood. In this study, we examined whether an extract of S. borealis activates AMP-activated protein kinase (AMPK) and exerts anti-hyperglycemic effects. Treatment with the S. borealis extract increased insulin signaling and phosphorylation of AMPK and stimulated the expression of its downstream targets, including PPAR?, ACO, and CPT-1 in C2C12 cells and PPAR? in HepG2 cells. However, inhibition of AMPK activation attenuated insulin signaling and prevented the stimulation of AMPK target genes. The S. borealis extract increased glucose uptake in C2C12 cells and suppressed expression of the gluconeogenic gene, PEPCK in HepG2 cells. The extract significantly reduced blood glucose and triglyceride levels in STZ-induced diabetic mice. The extract enhanced AMPK phosphorylation and increased Glut-4 expression in the skeletal muscle of the mice. These findings demonstrated that the S. borealis extract exerts its anti-hyperglycemic effect through activation of AMPK and enhancement of insulin signaling. PMID:23423690

Nam, Jung Soo; Chung, Hee Jin; Jang, Min Kyung; Jung, In Ah; Park, Seong Ha; Cho, Su In

2013-01-01

58

Mining R Coronae Borealis stars from Catalina surveys  

NASA Astrophysics Data System (ADS)

Aims: R Coronae Borealis stars (RCBs) are rare carbon stars that lack of hydrogen in their photospheresand are most likely products of white dwarf mergers. A census of RCBs can shed light on the progenitors of SNe Ia in the context of a double degenerate scenario. Methods: Traditionally, RCBs are identified by their unpredictable photometric variation with dimmings up to 9 mag, and thus discoveries of RCBs are heavily biased to the limited regions monitored by long-term microlensing experiments. However, recent studies of galactic RCBs have shown that they exhibit distinct mid-infrared colors originating from their cool circumstellar shells, and the all-sky WISE survey facilitates the identification of RCB candidates. Therefore, combining the WISE colors with large area time-domain surveys will enable us to discover more RCBs. Results: This study presents the results of 26 RCB candidates from the Catalina surveys, where five of them are spectroscopically confirmed RCBs and seven of them are previously known carbon stars. This demonstrates the efficacy of this kind of an approach and the potential to discover uncharted RCBs in ongoing and future synoptic surveys.

Lee, C.-H.

2015-03-01

59

How Many R Coronae Borealis Stars Are There Really? (Abstract)  

NASA Astrophysics Data System (ADS)

(Abstract only) The R Coronae Borealis (RCB) stars are rare hydrogen-deficient, carbon-rich supergiants. Two evolutionary scenarios have been suggested, a double degenerate merger of two white dwrfs (WDs), or a final helium shell flash in a planetary nebula central star. Only about 100 of the predicted 3,000 RCB stars in the Galaxy have been discovered. But the pace of discovery of new RCB stars in the Milky Way has been accelerating. We recently discovered over twenty new RCB stars by examining ASAS-e light curves. Using the recent release of the WISE All-Sky Catalog, a series of IR color-color cuts have produced a sample of candidates that may yield over 200 new RCB stars. We are trying to obtain spectra of these stars to confirm their identifications. The evidence pointing toward a WD merger or a final-flash origin for RCB stars is contradictory. Increasing the sample of known RCB stars, so that we can better study their spatial distribution in the Galaxy, can give us clues to their origins. Their number and distribution may be consistent with WD mergers. If so, this would be an exciting result since RCB stars may be low-mass analogs of Type Ia supernovae.

Clayton, G. C.

2014-12-01

60

Introduction The primary pink shrimp, Farfante-  

E-print Network

in part by the establishment of sanctuaries which The U.S. Gulf of Mexico Pink Shrimp, Farfantepenaeus.hart@noaa.gov). ABSTRACT--U.S. Gulf of Mexico, pink shrimp, Farfantepenaeus duorarum, catch statistics have been collected

61

CONJOINED TWIN ADULT SHRIMP (DECAPODA: PENAEIDAE)  

E-print Network

NOTES CONJOINED TWIN ADULT SHRIMP (DECAPODA: PENAEIDAE) A two-headed roughback shrimp by preservation. Antennules, anten- FIGURE I.-Conjoined twin Trackype1UUi'1U1 simi/is in diagrammatic lateral view

62

Aploparaksis borealis sp. n. (Cestoda: Hymenolepididae) from passeriform and charadriiform birds in Chukotka and Alaska.  

PubMed

Aploparaksis borealis sp. n. (Cestoda: Hymenolepididae), from the long-tailed jaeger, Stercorarisu longicaudus Vieillot, on the Seward Peninsula, Alaska, and from the red-throated pipit, Anthus cervinus (Pallas), and the Lapland longspur, Calcarius lapponicus (Linnaeus), in Chukotka, northestern Siberia, is described. This cestode is distinguished by the structure of the cirrus and other morphologic characters from other species of Aploparaksis Clerc 1903 in which there are 10 rostellar hooks and the vitelline gland is aporal to the ovary. A. borealis is the first species of Aploparaksis to be reported from birds representing 2 orders (Passeriformes and Charadriiformes). PMID:845746

Bondarenko, S K; Rausch, R L

1977-02-01

63

Phytophthora borealis and Phytophthora riparia, new species in Phytophthora ITS Clade 6.  

PubMed

Phytophthora borealis and Phytophthora riparia, identified in recent Phytophthora surveys of forest streams in Oregon, California and Alaska, are described as new species in Phytophthora ITS Clade 6. They are similar in growth form and morphology to P. gonapodyides and are predominantly sterile. They present unique DNA sequences, however, and differ in temperature/growth relations and geographic distribution. PMID:22778166

Hansen, Everett M; Reeser, Paul W; Sutton, Wendy

2012-01-01

64

THE UNITED STATES SHRIMP INDUSTRY  

E-print Network

for administrative or legislative action. It is issued in limited quantities for official use of Federal, State or cooperating agencies and in processed form for economy and to avoid delay in publication . #12;United StatesBioner SURVEY OF THE UNITED STATES SHRIMP INDUSTRY VOLUME II Prepared in Branch of Economics Bureau

65

Fin Whale (Balaenoptera physalus): Western North Atlantic Stock _____________________ 2 Sei Whale (Balaenoptera borealis): Nova Scotia Stock _______________________________ 9  

E-print Network

1 Fin Whale (Balaenoptera physalus): Western North Atlantic Stock _____________________ 2 Sei Whale (Balaenoptera borealis): Nova Scotia Stock _______________________________ 9 Minke Whale (Balaenoptera acutorostrata acutorostrata): Canadian East Coast Stock ____ 15 Sperm Whale (Physeter macrocephalus): North

66

Ex-vessel demand by size for the Gulf shrimp  

E-print Network

. MODEL FORMULATION Literature Review. The Restricted Model Dependent Variable. Independent Variables: Related to Supplies. Other Independent Variables Demand for Large Gulf Shrimp. Demand for Medium Gulf Shrimp Demand for Small Gulf Shrimp.... Unrestricted Model Zero-One Variables. Demand for Large Gulf Shrimp. Demand for Medium Gulf Shrimp Demand for Small Gulf Shrimp. 6 10 ll 12 13 14 15 16 17 18 21 22 23 III. STATISTICAL ANALVSIS. 25 The Data Estimation Procedure Ordinary...

Chui, Margaret Kam-Too

1980-01-01

67

Marginalization or Empowerment? Women's Involvement in Shrimp Cultivation and Shrimp Processing Plants in Bangladesh  

Microsoft Academic Search

Shrimp production in the coastal areas (Khulna, Satkhira, Bagerhat and Cox's Bazar districts) has led to the change of the total landscape. Various environmental studies have been conducted to highlight the impact of shrimp production, which is quite evident from the disappearance of the mangrove forests and their conversion into shrimp farms. This ecological change is a major factor behind

Sadeka Halim

68

Biological treatment of shrimp production wastewater  

Microsoft Academic Search

Over the last few decades, there has been an increase in consumer demand for shrimp, which has resulted in its worldwide aquaculture\\u000a production. In the United States, the stringent enforcement of environmental regulations encourages shrimp farmers to develop\\u000a new technologies, such as recirculating raceway systems. This is a zero-water exchange system capable of producing high-density\\u000a shrimp yields. The system also

Raj Boopathy

2009-01-01

69

Arsenic in shrimp from Kuwait  

SciTech Connect

Arsenic is ubiquitous in the environment and can accumulate in food via contaminated soil, water or air. It enters the food chain through dry and wet atmospheric deposition. Combustion of oil and coal, use of arsenical fertilizers and pesticides and smelting of ores contributes significantly to the natural background of arsenic in soils and sediments. The metal can be transferred from soil to man through plants. In spite of variation in acute, subacute, and chronic toxic effects to plants and animals, evidence of nutritional essentiality of arsenic for rats, goats, and guinea pigs has been suggested, but has not been confirmed for humans. Adverse toxic effects of arsenic as well as its widespread distribution in the environment raises concern about levels of arsenic in man`s diet. Higher levels of arsenic in the diet can result in a higher accumulation rate. Arsenic levels in marine organisms are influenced by species differences, size of organism, and human activities. Bottom dwellers such as shrimp, crab, and lobster accumulate more arsenic than fish due to their frequent contact with bottom sediments. Shrimp constitute approximately 30% of mean total seafood consumption in Kuwait. This study was designed to determine the accumulation of arsenic in the commercially important jinga shrimp (Metapenaeus affinis) and grooved tiger prawn (Penaeus semisulcatus). 13 refs., 3 figs., 1 tab.

Bou-Olayan, A.H. [Kuwait Univ. (Kuwait); Al-Yakoob, S.; Al-Hossaini, M. [Kuwait Institute for Scientific Research (Kuwait)

1995-04-01

70

Expression and localization of an ice nucleating protein from a soil bacterium, Pseudomonas borealis.  

PubMed

An ice nucleating protein (INP) coding region with 66% sequence identity to the INP of Pseudomonas syringae was previously cloned from P. borealis, a plant beneficial soil bacterium. Ice nucleating activity (INA) in the P. borealis DL7 strain was highest after transfer of cultures to temperatures just above freezing. The corresponding INP coding sequence (inaPb or ina) was used to construct recombinant plasmids, with recombinant expression visualized using a green fluorescent protein marker (gfp encoding GFP). Although the P. borealis strain was originally isolated by ice-affinity, bacterial cultures with membrane-associated INP-GFP did not adsorb to pre-formed ice. Employment of a shuttle vector allowed expression of ina-gfp in both Escherichia coli and Pseudomonas cells. At 27 °C, diffuse fluorescence appeared throughout the cells and was associated with low INA. However, after transfer of cultures to 4 °C, the protein localized to the poles coincident with high INA. Transformants with truncated INP sequences ligated to either gfp, or an antifreeze protein-gfp fusion showed that the repetitive ice-nucleation domain was not necessary for localization. Such localization is consistent with the flanking residues of the INP associating with a temperature-dependent secretion apparatus. A polar location would facilitate INP-INP interactions resulting in the formation of larger aggregates, serving to increase INA. Expression of INPs by P. borealis could function as an efficient atmospheric dispersal mechanism for these soil bacteria, which are less likely to use these proteins for nutrient procurement, as has been suggested for P. syringae. PMID:24930584

Vanderveer, Tara L; Choi, Julie; Miao, Denian; Walker, Virginia K

2014-08-01

71

Hydraulic redistribution in Eucalyptus kochii subsp. borealis with variable access to fresh groundwater  

Microsoft Academic Search

Salinity caused by land clearing is an important cause of land degradation in the Western Australian wheatbelt. Returning\\u000a a proportion of the cleared land to higher water use perennial vegetation is one option for reducing or slowing the salinisation\\u000a of land. Over the course of a year patterns of water use by Eucalyptus kochii subsp borealis (C. Gardner) D. Nicolle,

K. Brooksbank; D. A. White; E. J. Veneklaas; J. L. Carter

2011-01-01

72

Mercury selection of allozyme genotypes in shrimps  

Microsoft Academic Search

Summary The effects of mercury pollution on the allozymic variation of 15 phosphoglucomutase (PGM) genotypes was tested in the Mediterranean shrimpPalaemon elegans in 79 laboratory tests involving 2765 shrimps, with 1560 survivors (767 test and 793 control). Our results indicate differential tolerance of genotypes in variable mercury concentrations, suggesting that they are adaptive. The genetic structure can possibly be explored

E. Nevo; T. Perl; A. Beiles; D. Wool

1981-01-01

73

Function of shrimp STAT during WSSV infection.  

PubMed

JAK/STAT signaling pathway plays key roles in the antiviral immunity of mammals, fish and insect. However, limited knowledge is known about the function of JAK/STAT signaling pathway in the antiviral immunity of shrimp although virus disease has caused severe mortality in shrimp aquaculture. In order to understand the function of JAK/STAT signaling pathway in the antiviral immunity of shrimp, dsRNA interfering technique was used to silence the expression of STAT gene in Litopenaeus vannamei, and the mortality of shrimp was detected after WSSV infection. Furthermore, the expressions of some potential target genes regulated by STAT or genes related to RNA interfering pathway were detected in STAT silenced shrimp during WSSV infection. The WSSV copy number in STAT silenced shrimp was 10(2)-10(3) copies/ng DNA which was much lower than that in the control. The mortality in STAT silenced shrimp caused by WSSV infection decreased very significantly compared to their controls. The function of STAT was verified in vitro cultured cells of hematopoietic tissue of crayfish Cherax quadricarinatus by adding specific inhibitor of STAT3(S3I-201), and the cultured cells treated with S3I-201 showed much less WSSV copy number than their controls, which further suggested that STAT might be helpful for the replication of WSSV. Expression analysis on the potential STAT target genes and genes in RNA interfering pathway provide important information for understanding the functional mechanism of STAT in antiviral immunity of shrimp. PMID:24727196

Wen, Rong; Li, Fuhua; Li, Shihao; Xiang, Jianhai

2014-06-01

74

21 CFR 102.55 - Nonstandardized breaded composite shrimp units.  

Code of Federal Regulations, 2010 CFR

...filled in with the words “breaded shrimp sticks” or “breaded shrimp cutlets” depending...prepared in a shape other than that of sticks or cutlets “breaded shrimp ___ made...type used in the words “breaded shrimp sticks” or the other comparable words...

2010-04-01

75

21 CFR 102.55 - Nonstandardized breaded composite shrimp units.  

Code of Federal Regulations, 2011 CFR

...filled in with the words “breaded shrimp sticks” or “breaded shrimp cutlets” depending...prepared in a shape other than that of sticks or cutlets “breaded shrimp ___ made...type used in the words “breaded shrimp sticks” or the other comparable words...

2011-04-01

76

Evaluation of Toxicity of Some Saponins on Brine Shrimp  

Microsoft Academic Search

Toxicity of several types of saponins (1–11) against brine shrimp (Artemia salina) were evaluated. As a result, it was found that most tested compounds were not toxic to brine shrimp at high enough concentration. The most toxic saponin (1) to brine shrimp showed also cytotoxicity towards HL-60 tumor cell line using MTT assay. Brine shrimp model may thus be used

Wei-Min Zhao; Guo-Wei Qin; Li-Guang Lou

1999-01-01

77

Probiotics as Antiviral Agents in Shrimp Aquaculture  

PubMed Central

Shrimp farming is an aquaculture business for the cultivation of marine shrimps or prawns for human consumption and is now considered as a major economic and food production sector as it is an increasingly important source of protein available for human consumption. Intensification of shrimp farming had led to the development of a number of diseases, which resulted in the excessive use of antimicrobial agents, which is finally responsible for many adverse effects. Currently, probiotics are chosen as the best alternatives to these antimicrobial agents and they act as natural immune enhancers, which provoke the disease resistance in shrimp farm. Viral diseases stand as the major constraint causing an enormous loss in the production in shrimp farms. Probiotics besides being beneficial bacteria also possess antiviral activity. Exploitation of these probiotics in treatment and prevention of viral diseases in shrimp aquaculture is a novel and efficient method. This review discusses the benefits of probiotics and their criteria for selection in shrimp aquaculture and their role in immune power enhancement towards viral diseases. PMID:23738078

Lakshmi, Bestha; Sai Gopal, D. V. R.

2013-01-01

78

77 FR 40848 - Certain Frozen Warmwater Shrimp From India: Final Results of Antidumping Duty Administrative...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Certain Frozen Warmwater Shrimp From India: Final Results of Antidumping Duty Administrative...frozen warmwater shrimp (shrimp) from India. The period of review (POR) is February...the antidumping duty order on shrimp from...

2012-07-11

79

78 FR 15691 - Certain Frozen Warmwater Shrimp From India; Preliminary Results of Antidumping Duty...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Certain Frozen Warmwater Shrimp From India; Preliminary Results of Antidumping Duty...frozen warmwater shrimp (shrimp) from India. The review covers 195 producers/ exporters...Certain Frozen Warmwater Shrimp From India, 77 FR 73619 (December 11,...

2013-03-12

80

76 FR 12025 - Certain Frozen Warmwater Shrimp From India: Preliminary Results of Antidumping Duty...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Certain Frozen Warmwater Shrimp From India: Preliminary Results of Antidumping Duty...frozen warmwater shrimp (shrimp) from India with respect to 202 companies.\\1\\ The...on certain frozen warmwater shrimp from India. See Notice of Amended Final...

2011-03-04

81

75 FR 41813 - Certain Frozen Warmwater Shrimp From India: Final Results of Antidumping Duty Administrative...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Certain Frozen Warmwater Shrimp From India: Final Results of Antidumping Duty Administrative...frozen warmwater shrimp (shrimp) from India. This review covers 159 producers/exporters...duty order with respect to shrimp from India produced and exported by Devi Sea...

2010-07-19

82

77 FR 13275 - Certain Frozen Warmwater Shrimp From India: Preliminary Results of Antidumping Duty...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Certain Frozen Warmwater Shrimp From India: Preliminary Results of Antidumping Duty...frozen warmwater shrimp (shrimp) from India. The respondents which the Department...on certain frozen warmwater shrimp from India.\\1\\ [[Page 13276

2012-03-06

83

An investigation into the non-shrimp biological communities of a shrimp culture pond  

E-print Network

AN INVESTIGATION INTO THE NOh-SHRIMP BIOLOGICAL COMMUNITIES OF A SHRIMP CULTURE POND A Thesis by BENNIE LEE PRESSLY Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE May 1983 Major Subject: Oceanography AN INVESTIGATION INTO THE NON-SHRIMP BIOLOGICAL COMMUNITIES OF A SHRIMP CULTURE POND A Thesis by BENNIE LEE PRESSLY Approved as to style and content by: Rezne 1. Darnell (Chai an f Committee) Willis E...

Pressly, Bennie Lee

1983-01-01

84

Drilling Polar Oceans with the European Research Icebreaker AURORA BOREALIS: the IODP Context  

NASA Astrophysics Data System (ADS)

Polar oceans are characterized by extreme environmental conditions for humans and materials, and have remained the least accessible regions to scientists of the IODP. DSDP and ODP have for long faced specific technical and logistical problems when attempting to drill in ice-covered polar deep-sea basins. The Arctic Ocean and large areas of the high-latitude Southern Ocean remained largely un-sampled by ODP and remain one of the major scientific and technological challenges for IODP. Drilling in these regions has been discussed and anticipated for decades and the scientific rationales are reflected in the science plans of the international Nansen Arctic Drilling Program (NAD) or the Arctic Program Planning Group (APPG) of ODP/IODP, amongst others. More recently, the rationale to investigate the polar oceans in a holistic approach has been outlined by workshops, leading to strategic assessments of the scientific potential and new drilling proposals. The European Polar Board took the initiative to develop a plan for a novel and dedicated research icebreaker with technical capabilities hitherto unrealised. This research icebreaker will enable autonomous operations in the central Arctic Ocean and the Southern Ocean, even during the severest ice conditions in the deep winter, serving all marine disciplines of polar research including scientific drilling: The European Research Icebreaker and Deep-Sea Drilling Vessel AURORA BOREALIS. AURORA BOREALIS is presently planned as a multi-purpose vessel. The ship can be deployed as a research icebreaker in all polar waters during any season of the year, as it shall meet the specifications of the highest ice-class attainable (IACS Polar Code 1) for icebreakers. During the times when it is not employed for drilling, it will operate as the most technically advanced multi-disciplinary research vessel in the Arctic or polar Southern Ocean. AURORA BOREALIS will be a "European scientific flagship facility" (fully open to non-European partners), a multidisciplinary platform for studies ranging from the sub-seafloor into the atmosphere. AURORA BOREALIS was planned for her role in deep-sea drilling in consultation with engineers and technical experts familiar with the program and the operation of these vessels. All techniques currently deployed on IODP expeditions can be implemented onboard the vessel under polar weather and ice conditions, including the full range of re-entry, casing and cementing, and instrumentation options and the entire suite of downhole logging tools. Due to sufficient laboratory space, a full analytical workflow can be easily established comparable to existing permanent platforms, including clean rooms, diverse scanning and logging or incubation facilities. While the vessel is equipped with a dedicated deep-sea drilling rig, other coring and drilling techniques can be employed if needed (e.g. Rockdrill, MEBO, large diameter Kasten cores). AURORA BOREALIS is fitted to operate a CALYPSO Piston Coring System in polar waters. Future mud-return systems under consideration and testing for IODP to provide controlled borehole conditions in difficult facies are compatible with the layout of AURORA BOREALIS. The berthing capacity of 120 personnel total (scientists, technical support and crew) allows to accommodate a sufficient number of science party members offshore. The present scientific implementation documents plan for about one polar scientific drilling expedition per year in a to-be-determined configuration. As the vessel is a multi-dsiciplinary platform, operations for the entire year are not dependant on drilling operations alone. While principal access to the vessel will be based on a competitive proposal review and evaluation system, the allocation of timeslots specifically for drilling would preferably be given over to IODP handling and planning systems in a cooperative mode using the strengths and capacitites of the future program. Depending on interests and needs of the scientific communities a preferential focus in non-drilling expedition planning could be e

Lembke-Jene, Lester; Wolff-Boenisch, Bonnie; Azzolini, Roberto; Thiede, Joern; Biebow, Nicole; Eldholm, Olav; Egerton, Paul

2010-05-01

85

Antiviral defense in shrimp: from innate immunity to viral infection.  

PubMed

The culture of penaeid shrimp is rapidly developing as a major business endeavor worldwide. However, viral diseases have caused huge economic loss in penaeid shrimp culture industries. Knowledge of shrimp innate immunity and antiviral responses has made important progress in recent years, allowing the design of better strategies for the prevention and control of shrimp diseases. In this study, we have updated information on shrimp antiviral immunity and interactions between shrimp hosts and viral pathogens. Current knowledge and recent progress in immune signaling pathways (e.g., Toll/IMD-NF-?B and JAK-STAT signaling pathways), RNAi, phagocytosis, and apoptosis in shrimp antiviral immunity are discussed. The mechanism of viral infection in shrimp hosts and the interactions between viruses and shrimp innate immune systems are also analyzed. PMID:24886688

Wang, Pei-Hui; Huang, Tianzhi; Zhang, Xiaobo; He, Jian-Guo

2014-08-01

86

Climatic controls of a keystone understory species, Sasamorpha borealis , and an impact assessment of climate change in Japan  

Microsoft Academic Search

Introduction\\u000a   The aims of this study were to identify the climatic conditions controlling the distribution of Sasamorpha borealis and to assess the impact of climate change on the species in Japan.\\u000a \\u000a \\u000a \\u000a \\u000a \\u000a Materials and methods\\u000a   The relationship between S. borealis distribution and climatic variables in the Japanese Archipelago was explored using classification tree analysis. Potential\\u000a habitat maps under the current and

Ikutaro Tsuyama; Katsuhiro Nakao; Tetsuya Matsui; Motoki Higa; Masahiro Horikawa; Yuji Kominami; Nobuyuki Tanaka

87

Signaling pathways regulating innate immune responses in shrimp.  

PubMed

The first line of defense against microbial infections in animals is innate immune response which triggers diverse humoral and cellular activities via signal transduction pathways. Toll, IMD and JAK/STAT pathways are regarded as the main pathways regulating the immune response of invertebrates. This paper reviews the main progress of the investigation on the immune response to pathogen's infection in shrimp and supposes that these three signal pathways exist in shrimp. Most of the components (proteins or genes) involved in Toll pathway of Drosophila have been cloned also in shrimp which suggested the existence of Toll pathway in shrimp. The data update shows that the Toll pathway of shrimp is responsive not only to Gram-positive bacteria, Gram-negative bacteria, but also to WSSV. Challenge of WSSV can lead to the variation of transcription level of all identified components in shrimp Toll pathway, which supported that Toll pathway in shrimp played important roles during WSSV infection. Two major homologs to the components of IMD pathway of Drosophila, IMD and Relish, have been identified in shrimp, which indicated that IMD pathway should be existed in shrimp and might play important roles in regulating the immune response of shrimp to bacteria and virus infection. Relish in IMD pathway and dorsal in Toll pathway of shrimp were both involved in the immune response of shrimp to bacteria and virus infection, which implied that these two pathways are not completely separated during the immune response of shrimp. The transcription of STAT in shrimp was modulated after WSSV infection, which suggested that a putative JAK/STAT pathway might exist in shrimp and be very important to virus infection. Study on the signaling pathway regulating the immune response in shrimp could help us to understand the innate immune system, and would provide instructions to shrimp disease control. Obviously, to get more clear ideas about the innate immunological pathways in shrimp, more solid functional studies should be done in the future. PMID:22967763

Li, Fuhua; Xiang, Jianhai

2013-04-01

88

Hydrologic activity during late Noachian and Early Hesperian downwarping of Borealis Basin, Mars  

NASA Astrophysics Data System (ADS)

Pronounced global volcanism as well as fracturing and erosion along the highland/lowland boundary (HLB) during the Late Noachian (LN) and Early Hesperian (EH) led McGill and Dimitriou to conclude that the Borealis basin formed tectonically during this period. This scenario provides a basis for interpretation of the initiation and mode of formation of erosional and collapse features along the HLB. The interpretation, in turn, is integral to hypotheses regarding the development of ancient lakes (or an ocean) and their impact on the climate history of Mars. Hydrologic features of Mars are discussed along with their implications for paleolakes and climate history.

Tanaka, Kenneth L.

1991-06-01

89

THE HOT R CORONAE BOREALIS STAR DY CENTAURI IS A BINARY  

SciTech Connect

The remarkable hot R Coronae Borealis (RCB) star DY Cen is revealed to be the first and only binary system to be found among the RCB stars and their likely relatives, including the extreme helium stars and the hydrogen-deficient carbon stars. Radial velocity determinations from 1982 to 2010 have shown that DY Cen is a single-lined spectroscopic binary in an eccentric orbit with a period of 39.67 days. It is also one of the hottest and most H-rich member of the class of RCB stars. The system may have evolved from a common envelope to its current form.

Kameswara Rao, N. [543, 17th Main, IV Sector, HSR Layout, Bangalore 560102 (India); Lambert, David L.; McArthur, Barbara [W. J. McDonald Observatory, University of Texas, Austin, TX 78712-1083 (United States); Garcia-Hernandez, D. A. [Instituto de Astrofisica de Canarias, C/Via Lactea s/n, E-38205 La Laguna (Spain); Simon Jeffery, C. [Armagh Observatory, College Hill, Armagh BT61 9DG (United Kingdom); Woolf, Vincent M., E-mail: nkrao@iiap.res.in, E-mail: dll@astro.as.utexas.edu, E-mail: agarcia@iac.es [Physics Department, University of Nebraska at Omaha, NE 68182-0266 (United States)

2012-11-20

90

Hydrologic activity during late Noachian and Early Hesperian downwarping of Borealis Basin, Mars  

NASA Technical Reports Server (NTRS)

Pronounced global volcanism as well as fracturing and erosion along the highland/lowland boundary (HLB) during the Late Noachian (LN) and Early Hesperian (EH) led McGill and Dimitriou to conclude that the Borealis basin formed tectonically during this period. This scenario provides a basis for interpretation of the initiation and mode of formation of erosional and collapse features along the HLB. The interpretation, in turn, is integral to hypotheses regarding the development of ancient lakes (or an ocean) and their impact on the climate history of Mars. Hydrologic features of Mars are discussed along with their implications for paleolakes and climate history.

Tanaka, Kenneth L.

1991-01-01

91

AURORA BOREALIS - Development of a New Research Icebreaker with Drilling Capability  

NASA Astrophysics Data System (ADS)

Polar research both on land and in the sea cannot achieve the needed progress without novel and state of the art technologies and infrastructure. In addition, we have the obligation to equip the upcoming young and courageous generation of polar researchers with the most modern and safest research platforms the 21st century can provide. This effort will require major investments, both in terms of generating new tools, as well as maintaining and renovating existing infrastructure. There are many different novel tools under development for polar research, we will concentrate on the presently largest one, the planning for a new type of research icebreaker, the AURORA BOREALIS with an all-season capability of operations in permanently ice-covered waters and with the possibility to carry out deep-sea drilling in ice-covered deep-sea basins. AURORA BOREALIS will be the most advanced Polar Research Vessel in the world with a multi-functional role of drilling in deep ocean basins and supporting climate and environmental research and decision support for stakeholder governments for the next 35 to 40 years. The vessel is planned as a large research icebreaker with 44,000 tons displacement and a length of up to 196 m, with about 50 Megawatt propulsion power. Advanced technological features will include azimuth propulsion systems, extensive instrumental and airborne ice- management support, and the routine operation of Remotely Operated Vehicles (ROV) and Autonomous Underwater Vehicles (AUVs) from two moon-pools. An unique feature of this icebreaker will be the drilling rig that will enable sampling of the ocean floor and sub-sea down to 5000 m water depth and 1000 m penetration at the most inhospitable places on earth. The possibility to flexibly equip the ship with laboratory and supply containers, and the variable arrangement of other modular infrastructure (in particular, winches, cranes, etc.), free deck- space, and separate protected deck areas, will allow the planned research vessel to cover the needs of most disciplines in marine research. aurora-borealis.eu/en/about_aurora_borealis/

Thiede, J.; Biebow, N.; Egerton, P.; Kunz-Pirrung, M.; Lembke-Jene, L.

2007-12-01

92

ECOLOGY OF HAWAIIAN SERGESTID SHRIMPS (PEDAEIDEA: SERGESTIDAE)  

E-print Network

ECOLOGY OF HAWAIIAN SERGESTID SHRIMPS (PEDAEIDEA: SERGESTIDAE) A DISSERTATION SUBMITTED and migration, population size, seasonal size-frequency distribution and diet. Hawaiian sergestids occur, which lives two years. One species, ~. fulgens, apparently does not reproduce in Hawaiian waters

Luther, Douglas S.

93

COBALT60 Gamma Irradiation of Shrimp  

Microsoft Academic Search

Meta- and ortho-tyrosine were measured using high performance liquid chromatography (HPLC) in conjunction with electrochemical detection in shrimp irradiated using cobalt-60 gamma radiation in the absorbed dose range 0.8 to 6.0 kGy, in nonirradiated shrimp, and in bovine serum albumin (BSA) irradiated in dilute aqueous solution at 25.0 kGy. Ortho-tyrosine was measured in nonirradiated BSA. Para-, meta-, and ortho-tyrosine were

Nancy L. B. Sullivan; N. L. B

1993-01-01

94

Systems analysis of a shrimp mariculture system  

E-print Network

literature review of' shrimp mariculture, shrimp physiology, phytoplankton models and water qual' ty models formed the basis for analysis of' the interrelationships in a mariculture system. The general ecological black box model was broken... Phytoplankton Models. Zooplankton Models. Bacterial Models. Review oT Water Quality Models. Hydrology. Temperature. Nitrogen Ammonia Nitrite Nitrate Dissolved Oxygen. Phosphate Model Carbon Model. III. MODEL FORMULATION. General Ecological Model...

Farnsworth, John Terry

1979-01-01

95

Biological effects of the anti-parasitic chemotherapeutant emamectin benzoate on a non-target crustacean, the spot prawn (Pandalus platyceros Brandt, 1851) under laboratory conditions.  

PubMed

The potential impact of commercial salmon aquaculture along the coast of British Columbia on the health of non-target marine wildlife is of growing concern. In the current initiative, the biological effects on gene expression within spot prawn (Pandalus platyceros) exposed to the sea lice controlling agent, emamectin benzoate (EB; 0.1-4.8 mg/kg sediment), were investigated. A mean sediment/water partitioning coefficient (K(p)) was determined to be 21.81 and significant levels of EB were detected in the tail muscle tissue in all exposed animals. Animals selected for the experiment did not have eggs and were of similar weight. Significant mortality was observed within 8 days of EB treatment at concentrations between 0.1 and 0.8 mg/kg and there was no effect of EB on molting. Twelve spot prawn cDNA sequences were isolated from the tail muscle either by directed cloning or subtractive hybridization of control versus EB exposed tissues. Three of the transcripts most affected by EB exposure matched sequences encoding the 60S ribosomal protein L22, spliceosome RNA helicase WM6/UAP56, and the intracellular signal mediator histidine triad nucleotide binding protein 1 suggesting that translation, transcription regulation, and apoptosis pathways were impacted. The mRNA encoding the molting enzyme, ?-N-acetylglucosaminidase, was not affected by EB treatment. However, the expression of this transcript was extremely variable making it unsuitable for effects assessment. The results suggest that short-term exposure to EB can impact biological processes within this non-target crustacean. PMID:22088864

Veldhoen, Nik; Ikonomou, Michael G; Buday, Craig; Jordan, Jameson; Rehaume, Vicki; Cabecinha, Melissa; Dubetz, Cory; Chamberlain, Jon; Pittroff, Sabrina; Vallée, Kurtis; van Aggelen, Graham; Helbing, Caren C

2012-02-01

96

Electrical coupling and innexin expression in the stomatogastric ganglion of the crab Cancer borealis.  

PubMed

Gap junctions are intercellular channels that allow for the movement of small molecules and ions between the cytoplasm of adjacent cells and form electrical synapses between neurons. In invertebrates, the gap junction proteins are coded for by the innexin family of genes. The stomatogastric ganglion (STG) in the crab Cancer borealis contains a small number of identified and electrically coupled neurons. We identified Innexin 1 (Inx1), Innexin 2 (Inx2), Innexin 3 (Inx3), Innexin 4 (Inx4), Innexin 5 (Inx5), and Innexin 6 (Inx6) members of the C. borealis innexin family. We also identified six members of the innexin family from the lobster Homarus americanus transcriptome. These innexins show significant sequence similarity to other arthropod innexins. Using in situ hybridization and reverse transcriptase-quantitative PCR (RT-qPCR), we determined that all the cells in the crab STG express multiple innexin genes. Electrophysiological recordings of coupling coefficients between identified pairs of pyloric dilator (PD) cells and PD-lateral posterior gastric (LPG) neurons show that the PD-PD electrical synapse is nonrectifying while the PD-LPG synapse is apparently strongly rectifying. PMID:25210156

Shruti, Sonal; Schulz, David J; Lett, Kawasi M; Marder, Eve

2014-12-01

97

Phenological features of the antler fly Booponus borealis parasitizing antler deer and prognosis of the timing of its development  

Microsoft Academic Search

The antler fly Booponus borealis Rohd (Diptera, Calliphoridae), as well as the Siberian stag, its main host, is a relict form of the fauna of the Altai and Western Sayan mountains. The disease caused by invasion of its larvae, named booponuosis, occurs in all regions inhabited by domesticated and wild Siberian stags and other species of the family Cercidae, inflicting

I. Yu. Raabe

2008-01-01

98

The 203 kbp Mitochondrial Genome of the Phytopathogenic Fungus Sclerotinia borealis Reveals Multiple Invasions of Introns and Genomic Duplications  

PubMed Central

Here we report the complete sequence of the mitochondrial (mt) genome of the necrotrophic phytopathogenic fungus Sclerotinia borealis, a member of the order Helotiales of Ascomycetes. The 203,051 bp long mtDNA of S. borealis represents one of the largest sequenced fungal mt genomes. The large size is mostly determined by the presence of mobile genetic elements, which include 61 introns. Introns contain a total of 125,394 bp, are scattered throughout the genome, and are found in 12 protein-coding genes and in the ribosomal RNA genes. Most introns contain complete or truncated ORFs that are related to homing endonucleases of the LAGLIDADG and GIY-YIG families. Integrations of mobile elements are also evidenced by the presence of two regions similar to fragments of inverton-like plasmids. Although duplications of some short genome regions, resulting in the appearance of truncated extra copies of genes, did occur, we found no evidences of extensive accumulation of repeat sequences accounting for mitochondrial genome size expansion in some other fungi. Comparisons of mtDNA of S. borealis with other members of the order Helotiales reveal considerable gene order conservation and a dynamic pattern of intron acquisition and loss during evolution. Our data are consistent with the hypothesis that horizontal DNA transfer has played a significant role in the evolution and size expansion of the S. borealis mt genome. PMID:25216190

Mardanov, Andrey V.; Beletsky, Alexey V.; Kadnikov, Vitaly V.; Ignatov, Alexander N.; Ravin, Nikolai V.

2014-01-01

99

Incidence and inactivation of Listeria spp. on frozen shrimp  

Technology Transfer Automated Retrieval System (TEKTRAN)

Foodborne illness outbreaks occasionally occur as a result of microbiologically contaminated crustaceans, including shrimp. Foodborne pathogens occasionally found on shrimp include Listeria monocytogenes, Salmonella spp., Staphylococcus aureus, and Vibrios. In this study the microbiological qualit...

100

SPATIAL DISTRIBUTIONS OF BURROWING SHRIMP POPULATIONS IN TWO OREGON ESTUARIES  

EPA Science Inventory

Thalassinid burrowing shrimp (Neotrypaea californiensis and Upogebia pugettensis) inhabit large expanses of Pacific estuarine tide flats, from British Columbia to Baja California. The spatial distribution of shrimp populations within estuaries has rarely been quantified because ...

101

Proceedings of the Latin American Shrimp Culture Congress  

E-print Network

by protecting shrimp from fish predators (Fuss and Ogren 1966, Minello et al. 1987). Burrowing may also affect growth in penaeid shrimps. Metabolic rates and oxygen consumption are reduced when shrimp burrow (Lakshmi in this species is affected by light intensity (Wickham and Minkler 1975), temperature (Aldrich et al. 1968

102

Burrowing shrimp as foundation species in NE Pacific estuaries  

EPA Science Inventory

My talk will be about the my research to characterize the role that burrowing shrimp play as foundation/engineering species in Pacific NW estuaries. My research has focused on measuring the abundance & distribution of two species (ghost shrimp & mud shrimp) at ecosystem scales, ...

103

Biological treatment of shrimp production wastewater.  

PubMed

Over the last few decades, there has been an increase in consumer demand for shrimp, which has resulted in its worldwide aquaculture production. In the United States, the stringent enforcement of environmental regulations encourages shrimp farmers to develop new technologies, such as recirculating raceway systems. This is a zero-water exchange system capable of producing high-density shrimp yields. The system also produces wastewater characterized by high levels of ammonia, nitrate, nitrite, and organic carbon, which make waste management costs prohibitive. Shrimp farmers have a great need for a waste management method that is effective and economical. One such method is the sequencing batch reactor (SBR). A SBR is a variation of the activated sludge biological treatment process. This process uses multiple steps in the same reactor to take the place of multiple reactors in a conventional treatment system. The SBR accomplishes equalization, aeration, and clarification in a timed sequence in a single reactor system. This is achieved through reactor operation in sequences, which includes fill, react, settle, decant, and idle. A laboratory scale SBR was successfully operated using shrimp aquaculture wastewater. The wastewater contained high concentrations of carbon and nitrogen. By operating the reactors sequentially, namely, aerobic and anoxic modes, nitrification and denitrification were achieved as well as removal of carbon. Ammonia in the waste was nitrified within 4 days. The denitrification of nitrate was achieved by the anoxic process, and 100% removal of nitrate was observed within 15 days of reactor operation. PMID:19396482

Boopathy, Raj

2009-07-01

104

Breaking the Ice: Strategies for Future European Research in the Polar Oceans - The AURORA BOREALIS Concept  

NASA Astrophysics Data System (ADS)

Research vessels dedicated to work in polar ice-covered waters have only rarely been built. Their history began with Fritjof Nansen's FRAM, which he used for his famous first crossing of the Arctic Ocean 1893-1896. She served as example for the first generation of polar research vessels, at their time being modern instruments planned with foresight. Ice breaker technology has developed substantially since then. However, it took almost 80 years until this technical advance also reached polar research, when the Russian AKADEMIK FEDEROV, the German POLARSTERN, the Swedish ODEN and the USCG Cutter HEALY were built. All of these house modern laboratories, are ice-breakers capable to move into the deep-Arctic during the summer time and represent the second generation of dedicated polar research vessels. Still, the increasing demand in polar marine research capacities by societies that call for action to better understand climate change, especially in the high latitudes is not matched by adequate facilities and resources. Today, no icebreaker platform exists that is permanently available to the international science community for year-round expeditions into the central Arctic Ocean or heavily ice-infested waters of the polar Southern Ocean around Antarctica. The AURORA BOREALIS concept plans for a heavy research icebreaker, which will enable polar scientists around the world to launch international research expeditions into the central Arctic Ocean and the Antarctic continental shelf seas autonomously during all seasons of the year. The European Research Icebreaker Consortium - AURORA BOREALIS (ERICON-AB) was established in 2008 to plan the scientific, governance, financial, and legal frameworks needed for the construction and operation of this first multi-nationally owned and operated research icebreaker and polar scientific drilling platform. By collaborating together and sharing common infrastructures it is envisioned that European nations make a major contribution to tackle problems of high societal relevance beyond the scope of individual disciplines. It is planned to use part of the berthing capacity of AURORA BOREALIS for dedicated university education and teaching programmes in order to give future polar scientists the best training facilities available and enable a vital international exchange between educational centres. This aims at helping to vertically structure the new generation of young and well-trained students and playing a key role in the construction of an efficient research and innovation environment for future collaboration in polar research

Lembke-Jene, L.; Biebow, N.; Wolff-Boenisch, B.; Thiede, J.; European Research Icebreaker Consortium

2011-12-01

105

Low-frequency vocalizations of sei whales (Balaenoptera borealis) in the Southern Ocean.  

PubMed

Simultaneous sightings and acoustic detections of sei whales (Balaenoptera borealis) are scarce, and there are few published data describing their vocalizations. Analysis of recordings from directional frequency analysis and recording sonobuoys in the presence of sei whales in the Southern Ocean in March 2013 identified both downsweep and upsweep calls. Sound frequencies within all calls were between 34 and 87?Hz with an average call duration of 1.1?s. These very low-frequency sounds share characteristics with sei whale calls recorded near the Hawaiian Islands and off Cape Cod in winter and summer, respectively, but are the first documented sei whale calls in the Southern Ocean that are clearly less than 100?Hz. PMID:25480092

Calderan, Susannah; Miller, Brian; Collins, Kym; Ensor, Paul; Double, Michael; Leaper, Russell; Barlow, Jay

2014-12-01

106

Caryospora uptoni n. sp. (Apicomplexa: Eimeriidae) from red-tailed hawks (Buteo jamaicensis borealis).  

PubMed

Oocysts of Caryospora uptoni n. sp. were described from the feces of red-tailed hawks, Buteo jamaicensis borealis. Sporulated oocysts were spherical or subspherical and measured 28.1 by 26.4 micron. The oocyst wall was composed of a yellowish outer layer and brownish inner layer and was about 1.5 micron thick. Neither micropyle, polar granules, nor oocyst residuum were present. A single, spherical sporocyst 18.2 by 17.9 micron was present; a Stieda body was absent. A spherical eccentrically located sporocyst residuum was present in many sporocysts, but it degenerated to form a dispersed granular residuum in other sporocysts. Eight randomly arranged sporozoites, 12.6 by 4.2 micron, were present in each sporocyst; they contained a centrally or slightly posteriorly located nucleus. PMID:3806324

Lindsay, D S; Blagburn, B L

1986-10-01

107

Vulnerability of coastal livelihoods to shrimp farming: Insights from Mozambique.  

PubMed

Millions of people around the world depend on shrimp aquaculture for their livelihoods. Yet, the phenomenal growth of shrimp farming has often given rise to considerable environmental and social damage. This article examines the impacts of commercial, export-oriented shrimp aquaculture on local livelihood vulnerability by comparing the exposure, sensitivity, and adaptive capacity of shrimp farm employees with non-farm employees in rural Mozambique. Exposure to stressors was similar between the two groups. Shrimp farm employees had higher assets and higher adaptive capacity than non-farm employees. However, because their income is heavily dependent on a single commodity, shrimp farm employees were highly susceptible to the boom crop nature of intensive shrimp farming. The implications for aquaculture policy and vulnerability research are discussed. The article argues that coastal vulnerability is dynamic, variable, and influenced by multiple processes operating at multiple scales. PMID:25391555

Blythe, Jessica; Flaherty, Mark; Murray, Grant

2015-05-01

108

Pathogenicity of Bacillus thuringiensis for penaeid shrimp  

E-print Network

PATHOGENICITY OF BACILLUS THURINGIENSIS FOR PENAEID SHRIMP A Thesis by JANIS ELLEN LEHRER Submitted to the Graduate College of Texas ASM University in partial fulfillment of the requirement for the degree of MASTER OF SC1ENCE August 1979... Major Subject: Biology PATHOGENICITY OF BACILLUS THURINGIENSIS FOR PENAEID SHRIMP A Thesis by JANIS ELLEN LEHRER Approved as to style and content by: r. ohn R. Schwarz (C Chairman of Committee) P4Lf. ks~ Dr. S. M. (C5-Chai n of C 'ttee) Dr...

Lehrer, Janis Ellen

1979-01-01

109

Chitosan Fibers Modified with HAp/?–TCP Nanoparticles  

PubMed Central

This paper describes a method for preparing chitosan fibers modified with hydroxyapatite (HAp), tricalcium phosphate (?-TCP), and HAp/?-TCP nanoparticles. Fiber-grade chitosan derived from the northern shrimp (Pandalus borealis) and nanoparticles of tricalcium phosphate (?-TCP) and hydroxyapatite (HAp) suspended in a diluted chitosan solution were used in the investigation. Diluted chitosan solution containing nanoparticles of Hap/?-TCP was introduced to a 5.16 wt% solution of chitosan in 3.0 wt% acetic acid. The properties of the spinning solutions were examined. Chitosan fibers modified with nanoparticles of HAp/?-TCP were characterized by a level of tenacity and calcium content one hundred times higher than that of regular chitosan fibers. PMID:22174598

Wawro, Dariusz; Pighinelli, Luciano

2011-01-01

110

76 FR 23972 - Certain Frozen Warmwater Shrimp From Brazil, India, the People's Republic of China, Thailand, and...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Certain Frozen Warmwater Shrimp From Brazil, India, the People's Republic of China, Thailand...warmwater shrimp (shrimp) from Brazil, India, the People's Republic of China (PRC...antidumping duty orders on shrimp from Brazil, India, the PRC, Thailand, and Vietnam,...

2011-04-29

111

Shell form, growth, and production of Astarte borealis (Schumacher, 1817) (Astartidae, Bivalvia) in the southeastern Baltic Sea  

NASA Astrophysics Data System (ADS)

The relationships between the linear dimensions and body weight and the ratio between the masses, growth, and production were studied for the bivalve Astarte borealis inhabiting the southeastern Baltic Sea. The maximal shell length was 21.09 mm, while the maximum age was 8+. The linear growth was described by the Bertalanffy equation L ? = (1 - e -0.0894(?-(-0.7354))). The annual production was 7.60 kJ/m2 at a P s/ B coefficient of 0.41. It was found that the A. borealis inhabiting the southeastern Baltic Sea was characterized by a lower linear growth rate compared to the mollusks of other parts of the geographical range due to the low salinity of the Baltic Sea.

Gusev, A. A.; Rudinskaya, L. V.

2014-07-01

112

Discovery of a Previously Unrecognised Allusion to the Aurora Borealis in Paradise Lost, and Implications for Edmund Halley Scholarship  

NASA Astrophysics Data System (ADS)

This research reveals that John Milton employed an allusion to the aurora borealis in the epic poem Paradise Lost which has not been recognised in more than three centuries of scholarly analysis. It further disproves the long-held belief, made popular by the astronomer Edmund Halley, that no notable aurora was visible in England in the seventeenth century. A study of the personal Latin diary of the Elizabethan historian William Camden shows that the famous aurora of 1621 was visible in England. While Pierre Gassendi has been credited with creation of the term 'aurora borealis' based on his report of the 1621 aurora, this study reaffirms a neglected analysis from 1986 that established the term originated with Galileo in 1619.

Cunningham, Clifford J.

2014-11-01

113

Probiotics in shrimp aquaculture: avenues and challenges.  

PubMed

As an alternative strategy to antibiotic use in aquatic disease management, probiotics have recently attracted extensive attention in aquaculture. However, the use of terrestrial bacterial species as probiotics for aquaculture has had limited success, as bacterial strain characteristics are dependent upon the environment in which they thrive. Therefore, isolating potential probiotic bacteria from the marine environment in which they grow optimally is a better approach. Bacteria that have been used successfully as probiotics belong to the genus Vibrio and Bacillus, and the species Thalassobacter utilis. Most researchers have isolated these probiotic strains from shrimp culture water, or from the intestine of different penaeid species. The use of probiotic bacteria, based on the principle of competitive exclusion, and the use of immunostimulants are two of the most promising preventive methods developed in the fight against diseases during the last few years. It also noticed that probiotic bacteria could produce some digestive enzymes, which might improve the digestion of shrimp, thus enhancing the ability of stress resistance and health of the shrimp. However, the probiotics in aquatic environment remain to be a controversial concept, as there was no authentic evidence / real environment demonstrations on the successful use of probiotics and their mechanisms of action in vivo. The present review highlights the potential sources of probiotics, mechanism of action, diversity of probiotic microbes and challenges of probiotic usage in shrimp aquaculture. PMID:19514908

Ninawe, A S; Selvin, Joseph

2009-01-01

114

How Snapping Shrimp Snap: Through Cavitating Bubbles  

Microsoft Academic Search

The snapping shrimp (Alpheus heterochaelis) produces a loud snapping sound by an extremely rapid closure of its snapper claw. One of the effects of the snapping is to stun or kill prey animals. During the rapid snapper claw closure, a high-velocity water jet is emitted from the claw with a speed exceeding cavitation conditions. Hydrophone measurements in conjunction with time-controlled

Michel Versluis; Barbara Schmitz; Anna von der Heydt; Detlef Lohse

2000-01-01

115

Cobalt-60 gamma irradiation of shrimp  

SciTech Connect

Meta- and ortho-tyrosine were measured using high performance liquid chromatography (HPLC) in conjunction with electrochemical detection in shrimp irradiated using cobalt-60 gamma radiation in the absorbed dose range 0.8 to 6.0 kGy, in nonirradiated shrimp, and in bovine serum albumin (BSA) irradiated in dilute aqueous solution at 25.0 kGy. Ortho-tyrosine was measured in nonirradiated BSA. Para-, meta-, and ortho-tyrosine was measured using HPLC in conjunction with uv-absorption detection in dilute aqueous solutions of phenylalanine irradiated in the absorbed dose range 16.0 to 195.0 kGy. The measured yields of tyrosine isomers were approximately linear as a function of absorbed dose in shrimp, and in irradiated solutions of phenylalanine up to 37.0 kGy. The occurrence of meta- and ortho-tyrosine, which had formerly been considered unique radiolytic products, has not previously been reported in nonirradiated shrimp or BSA. The conventional hydrolyzation and analytical techniques used in the present study to measure meta- and ortho-tyrosine may provide the basis for a method to detect and determine the dose used in food irradiation.

Sullivan, N.L.B.

1993-01-01

116

Immunoaffinity-based mass spectrometric characterization of the FMRFamide-related peptide family in the pericardial organ of Cancer borealis  

Microsoft Academic Search

The tetrapeptide, FMRFamide, was first discovered in 1977 in the molluscan nervous system and was found to affect the contractile force of molluscan cardiac muscle and other muscles [1]. Since then, numerous FMRFamide-related peptides (FaRPs) have been reported in both invertebrate and vertebrate species [2–9]. We have previously reported the detection and identification of numerous FaRPs in Cancer borealis pericardial

Mingming Ma; Robert M. Sturm; Kimberly K. Kutz-Naber; Qiang Fu; Lingjun Li

2009-01-01

117

50 CFR 622.201 - South Atlantic rock shrimp limited access.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 false South Atlantic rock shrimp limited access. 622.201 Section...Atlantic Region § 622.201 South Atlantic rock shrimp limited access. (a) Commercial Vessel Permits for Rock Shrimp (South Atlantic EEZ)....

2013-10-01

118

50 CFR 622.201 - South Atlantic rock shrimp limited access.  

Code of Federal Regulations, 2014 CFR

...2014-10-01 false South Atlantic rock shrimp limited access. 622.201 Section...Atlantic Region § 622.201 South Atlantic rock shrimp limited access. (a) Commercial Vessel Permits for Rock Shrimp (South Atlantic EEZ)....

2014-10-01

119

75 FR 57501 - Frozen Warmwater Shrimp From Brazil, China, India, Thailand, and Vietnam  

Federal Register 2010, 2011, 2012, 2013, 2014

...Review)] Frozen Warmwater Shrimp From Brazil, China, India, Thailand, and Vietnam...orders on frozen warmwater shrimp from Brazil, China, India, Thailand, and Vietnam...orders on frozen warmwater shrimp from Brazil, China, India, Thailand, and...

2010-09-21

120

75 FR 22370 - Certain Frozen Warmwater Shrimp From Brazil, Ecuador, India, the People's Republic of China...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Certain Frozen Warmwater Shrimp From Brazil, Ecuador, India, the People's Republic...of certain frozen warmwater shrimp from Brazil, Ecuador, India, the People's Republic...Frozen and Canned Warmwater Shrimp From Brazil, 69 FR 76910 (December 23,...

2010-04-28

121

75 FR 22424 - Frozen Warmwater Shrimp From Brazil, China, India, Thailand, and Vietnam  

Federal Register 2010, 2011, 2012, 2013, 2014

...Review)] Frozen Warmwater Shrimp From Brazil, China, India, Thailand, and Vietnam...orders on frozen warmwater shrimp from Brazil, China, India, Thailand, and Vietnam...orders on frozen warmwater shrimp from Brazil, China, India, Thailand, and...

2010-04-28

122

75 FR 48724 - Frozen Warmwater Shrimp From Brazil, China, India, Thailand, and Vietnam  

Federal Register 2010, 2011, 2012, 2013, 2014

...Review)] Frozen Warmwater Shrimp From Brazil, China, India, Thailand, and Vietnam...orders on frozen warmwater shrimp from Brazil, China, India, Thailand, and Vietnam...orders on frozen warmwater shrimp from Brazil, China, India, Thailand, and...

2010-08-11

123

76 FR 16384 - Certain Frozen Warmwater Shrimp From the Socialist Republic of Vietnam: Extension of Preliminary...  

Federal Register 2010, 2011, 2012, 2013, 2014

...A-552-802] Certain Frozen Warmwater Shrimp From...is extending the time limit for the preliminary...shipper review of certain frozen warmwater shrimp...Viet''). See Certain Frozen Warmwater Shrimp from...19, 2011. Statutory Time Limits Section...

2011-03-23

124

75 FR 844 - Certain Frozen Warmwater Shrimp From the Socialist Republic of Vietnam: Extension of Preliminary...  

Federal Register 2010, 2011, 2012, 2013, 2014

...is extending the time limit for the preliminary...shipper review of certain frozen warmwater shrimp...Ltd. See Certain Frozen Warmwater Shrimp from...Department extended the time limit for issuing the...106 days. See Certain Frozen Warmwater Shrimp...

2010-01-06

125

77 FR 2958 - Certain Frozen Warmwater Shrimp From the Socialist Republic of Vietnam: Extension of Preliminary...  

Federal Register 2010, 2011, 2012, 2013, 2014

...is extending the time limit for the preliminary...duty order on certain frozen warmwater shrimp...duty order on certain frozen warmwater shrimp from...Department extended the time limit for the preliminary...1\\ See Certain Frozen Warmwater Shrimp...

2012-01-20

126

75 FR 20563 - Certain Frozen Warmwater Shrimp from the Socialist Republic of Vietnam: Extension of Final...  

Federal Register 2010, 2011, 2012, 2013, 2014

...A-552-802] Certain Frozen Warmwater Shrimp from...is extending the time limit for the final results...shipper review of certain frozen warmwater shrimp...Ltd. See Certain Frozen Warmwater Shrimp From...Statutory Time Limits In...

2010-04-20

127

76 FR 41760 - Certain Frozen Warmwater Shrimp From the Socialist Republic of Vietnam: Extension of Final...  

Federal Register 2010, 2011, 2012, 2013, 2014

...A-552-802] Certain Frozen Warmwater Shrimp From...is extending the time limit for the final results...shipper review of certain frozen warmwater shrimp from...1\\ See Certain Frozen Warmwater Shrimp from...Statutory Time Limits Section...

2011-07-15

128

75 FR 33375 - 30-Day Notice of Proposed Information Collection: DS-2031, Shrimp Exporter's/Importer's...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Information Collection: DS-2031, Shrimp Exporter's/Importer's Declaration, OMB...Title of Information Collection: Shrimp Exporter's/ Importer's Declaration. OMB...sea turtles. Respondents are shrimp exporters and government officials in...

2010-06-11

129

78 FR 39824 - 30-Day Notice of Proposed Information Collection: Shrimp Exporter's/Importer's Declaration  

Federal Register 2010, 2011, 2012, 2013, 2014

...Proposed Information Collection: Shrimp Exporter's/Importer's Declaration ACTION...Title of Information Collection: Shrimp Exporter's/ Importer's Declaration OMB...sea turtles. Respondents are shrimp exporters and government officials in...

2013-07-02

130

75 FR 10338 - 60-Day Notice of Proposed Information Collection: DS-2031, Shrimp Exporter's/Importer's...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Information Collection: DS-2031, Shrimp Exporter's/Importer's Declaration, OMB...Title of Information Collection: Shrimp Exporter's/ Importer's Declaration OMB...sea turtles. Respondents are shrimp exporters and government officials in...

2010-03-05

131

78 FR 15800 - 60-Day Notice of Proposed Information Collection: Shrimp Exporter's/Importer's Declaration  

Federal Register 2010, 2011, 2012, 2013, 2014

...Proposed Information Collection: Shrimp Exporter's/Importer's Declaration ACTION...Information Collection: Shrimp Importer's/ Exporter's Declaration. OMB Control Number...sea turtles. Respondents are shrimp exporters and government officials in...

2013-03-12

132

76 FR 51940 - Administrative Review of Certain Frozen Warmwater Shrimp From the People's Republic of China...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Certain Frozen Warmwater Shrimp From the People's Republic of China: Final Results...certain frozen warmwater shrimp from the People's Republic of China (``PRC...Certain Frozen Warmwater Shrimp From the People's Republic of China: Preliminary...

2011-08-19

133

75 FR 1078 - Frozen Warmwater Shrimp From Brazil, China, India, Thailand, and Vietnam  

Federal Register 2010, 2011, 2012, 2013, 2014

...Warmwater Shrimp From Brazil, China, India, Thailand, and Vietnam AGENCY: United...warmwater shrimp from Brazil, China, India, Thailand, and Vietnam...warmwater shrimp from Brazil, China, India, Thailand, and Vietnam would be...

2010-01-08

134

78 FR 50385 - Certain Frozen Warmwater Shrimp from India: Final Affirmative Countervailing Duty Determination  

Federal Register 2010, 2011, 2012, 2013, 2014

...Certain Frozen Warmwater Shrimp from India: Final Affirmative Countervailing Duty...warmwater shrimp (frozen shrimp) from India. For information on the estimated subsidy...programs. In addition to the Government of India, the company respondents in this...

2013-08-19

135

75 FR 17693 - Certain Frozen Warmwater Shrimp from Brazil, India, and Thailand: Notice of Initiation of...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Certain Frozen Warmwater Shrimp from Brazil, India, and Thailand: Notice of Initiation of...warmwater shrimp (shrimp) from Brazil, India and Thailand. The anniversary month of...Elizabeth Eastwood at (202) 482-3874 (India), and Kate Johnson at (202)...

2010-04-07

136

78 FR 42492 - Certain Frozen Warmwater Shrimp From India: Final Results of Antidumping Duty Administrative...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Certain Frozen Warmwater Shrimp From India: Final Results of Antidumping Duty Administrative...on certain frozen warmwater shrimp from India.\\1\\ The period of review (POR) is...See Certain Frozen Warmwater Shrimp From India; Preliminary Results of Antidumping...

2013-07-16

137

Zhongshania aliphaticivorans sp. nov., an aliphatic hydrocarbon-degrading bacterium isolated from marine sediment, and transfer of Spongiibacter borealis Jang et al. 2011 to the genus Zhongshania as Zhongshania borealis comb. nov.  

PubMed

A Gram-staining-negative, facultatively aerobic bacterium, designated SM-2(T), was isolated from a sea-tidal flat of Yellow Sea, South Korea. Cells were catalase- and oxidase-positive motile rods with a single polar flagellum. Growth of strain SM-2(T) was observed at 10-37 °C (optimum, 25-30 °C), at pH 5.5-8.5 (optimum, pH 7.0-7.5) and in the presence of 0-11% (w/v) NaCl (optimum, 2%). Strain SM-2(T) contained ubiquinone-8 (Q-8) as the sole isoprenoid quinone and C(17:1)?8c, summed feature 3 (comprising C(16:1)?7c and/or iso-C(15:0) 2-OH), C(17:0) and C(18:1)?7c as the major fatty acids. Phosphatidylethanolamine, phosphatidylglycerol, diphosphatidylglycerol and an unidentified lipid were identified as the major cellular polar lipids. The G+C content of the genomic DNA was 52.2 mol%. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain SM-2(T) formed a tight phyletic lineage with Zhongshania antarctica ZS5-23(T), Zhongshania guokunii ZS6-22(T) and Spongiibacter borealis CL-AS9(T), but that S. borealis CL-AS9(T) was distinct from other species of the genus Spongiibacter. Based on 16S rRNA gene sequence similarities, strain SM-2(T) was most closely related to S. borealis CL-AS9(T), Z. antarctica ZS5-23(T) and Z. guokunii ZS6-22(T), with similarities of 99.5%, 98.9% and 98.7%, respectively, but the DNA-DNA hybridization values among these species were clearly lower than 70%. On the basis of chemotaxonomic data and molecular properties, we propose strain SM-2(T) represents a novel species of the genus Zhongshania with the name Zhongshania aliphaticivorans sp. nov. (type strain SM-2(T)?=KACC 18120(T)?=JCM 30138(T)). We also propose the transfer of Spongiibacter borealis Jang et al. 2011 to the genus Zhongshania as Zhongshania borealis comb. nov. (type strain CL-AS9(T)?=KCCM 90094(T)?=JCM 17304(T)). PMID:25122615

Lo, Naysim; Kang, Hyo Jung; Jeon, Che Ok

2014-11-01

138

Development of the brine shrimp Artemia is accelerated during spaceflight  

NASA Technical Reports Server (NTRS)

Developmentally arrested brine shrimp cysts have been reactivated during orbital spaceflight on two different Space Shuttle missions (STS-50 and STS-54), and their subsequent development has been compared with that of simultaneously reactivated ground controls. Flight and control brine shrimp do not significantly differ with respect to hatching rates or larval morphology at the scanning and transmission EM levels. A small percentage of the flight larvae had defective nauplier eye development, but the observation was not statistically significant. However, in three different experiments on two different flights, involving a total of 232 larvae that developed in space, a highly significant difference in degree of flight to control development was found. By as early as 2.25 days after reactivation of development, spaceflight brine shrimp were accelerated, by a full instar, over ground control brine shrimp. Although developing more rapidly, flight shrimp grew as long as control shrimp at each developmental instar or stage.

Spooner, B. S.; Metcalf, J.; DeBell, L.; Paulsen, A.; Noren, W.; Guikema, J. A.

1994-01-01

139

77 FR 20358 - Certain Frozen Warmwater Shrimp From the Socialist Republic of Vietnam: Final Results of...  

Federal Register 2010, 2011, 2012, 2013, 2014

...shrimp (Penaeus vannemei), banana prawn (Penaeus merguiensis), fleshy prawn (Penaeus chinensis), giant river prawn (Macrobrachium rosenbergii), giant tiger prawn (Penaeus monodon), redspotted shrimp (Penaeus brasiliensis), southern brown...

2012-04-04

140

75 FR 37757 - Frozen Warmwater Shrimp From Vietnam: Initiation and Preliminary Results of Changed-Circumstances...  

Federal Register 2010, 2011, 2012, 2013, 2014

...shrimp (Penaeus vannemei), banana prawn (Penaeus merguiensis), fleshy prawn (Penaeus chinensis), giant river prawn (Macrobrachium rosenbergii), giant tiger prawn (Penaeus monodon), redspotted shrimp (Penaeus brasiliensis), southern brown...

2010-06-30

141

78 FR 33346 - Certain Frozen Warmwater Shrimp From the People's Republic of China: Preliminary Countervailing...  

Federal Register 2010, 2011, 2012, 2013, 2014

...shrimp (Penaeus vannemei), banana prawn (Penaeus merguiensis), fleshy prawn (Penaeus chinensis), giant river prawn (Macrobrachium rosenbergii), giant tiger prawn (Penaeus monodon), redspotted shrimp (Penaeus brasiliensis), southern brown...

2013-06-04

142

78 FR 33344 - Certain Frozen Warmwater Shrimp From India: Preliminary Countervailing Duty Determination  

Federal Register 2010, 2011, 2012, 2013, 2014

...shrimp (Penaeus vannemei), banana prawn (Penaeus merguiensis), fleshy prawn (Penaeus chinensis), giant river prawn (Macrobrachium rosenbergii), giant tiger prawn (Penaeus monodon), redspotted shrimp (Penaeus brasiliensis), southern brown...

2013-06-04

143

75 FR 47546 - Certain Frozen Warmwater Shrimp from the Socialist Republic of Vietnam: Preliminary Results of...  

Federal Register 2010, 2011, 2012, 2013, 2014

...shrimp (Penaeus vannemei), banana prawn (Penaeus merguiensis), fleshy prawn (Penaeus chinensis), giant river prawn (Macrobrachium rosenbergii), giant tiger prawn (Penaeus monodon), redspotted shrimp (Penaeus brasiliensis), southern brown...

2010-08-06

144

77 FR 23222 - Certain Frozen Warmwater Shrimp From the Socialist Republic of Vietnam: Final Results of...  

Federal Register 2010, 2011, 2012, 2013, 2014

...shrimp (Penaeus vannemei), banana prawn (Penaeus merguiensis), fleshy prawn (Penaeus chinensis), giant river prawn (Macrobrachium rosenbergii), giant tiger prawn (Penaeus monodon), redspotted shrimp (Penaeus brasiliensis), southern brown...

2012-04-18

145

75 FR 3446 - Certain Frozen Warmwater Shrimp From the Socialist Republic of Vietnam: Preliminary Intent To...  

Federal Register 2010, 2011, 2012, 2013, 2014

...shrimp (Penaeus vannemei), banana prawn (Penaeus merguiensis), fleshy prawn (Penaeus chinensis), giant river prawn (Macrobrachium rosenbergii), giant tiger prawn (Penaeus monodon), redspotted shrimp (Penaeus brasiliensis), southern brown...

2010-01-21

146

78 FR 33347 - Certain Frozen Warmwater Shrimp From Ecuador: Preliminary Negative Countervailing Duty Determination  

Federal Register 2010, 2011, 2012, 2013, 2014

...shrimp (Penaeus vannemei), banana prawn (Penaeus merguiensis), fleshy prawn (Penaeus chinensis), giant river prawn (Macrobrachium rosenbergii), giant tiger prawn (Penaeus monodon), redspotted shrimp (Penaeus brasiliensis), southern brown...

2013-06-04

147

78 FR 33349 - Certain Frozen Warmwater Shrimp From Indonesia: Negative Preliminary Countervailing Duty...  

Federal Register 2010, 2011, 2012, 2013, 2014

...shrimp (Penaeus vannemei), banana prawn (Penaeus merguiensis), fleshy prawn (Penaeus chinensis), giant river prawn (Macrobrachium rosenbergii), giant tiger prawn (Penaeus monodon), redspotted shrimp (Penaeus brasiliensis), southern brown...

2013-06-04

148

78 FR 35643 - Frozen Warmwater Shrimp from China, Ecuador, India, Indonesia, Malaysia, Thailand, and Vietnam...  

Federal Register 2010, 2011, 2012, 2013, 2014

...shrimp (Penaeus vannemei), banana prawn (Penaeus merguiensis), fleshy prawn (Penaeus chinensis), giant river prawn (Macrobrachium rosenbergii), giant tiger prawn (Penaeus monodon), redspotted shrimp (Penaeus brasiliensis), southern brown...

2013-06-13

149

75 FR 52718 - Certain Frozen Warmwater Shrimp From India: Final Results of Antidumping Duty Changed...  

Federal Register 2010, 2011, 2012, 2013, 2014

...shrimp (Penaeus vannemei), banana prawn (Penaeus merguiensis), fleshy prawn (Penaeus chinensis), giant river prawn (Macrobrachium rosenbergii), giant tiger prawn (Penaeus monodon), redspotted shrimp (Penaeus brasiliensis), southern brown...

2010-08-27

150

75 FR 54847 - Certain Frozen Warmwater Shrimp from Thailand: Final Results and Partial Rescission of...  

Federal Register 2010, 2011, 2012, 2013, 2014

...shrimp (Penaeus vannemei), banana prawn (Penaeus merguiensis), fleshy prawn (Penaeus chinensis), giant river prawn (Macrobrachium rosenbergii), giant tiger prawn (Penaeus monodon), redspotted shrimp (Penaeus brasiliensis), southern brown...

2010-09-09

151

78 FR 33342 - Certain Frozen Warmwater Shrimp From the Socialist Republic of Vietnam: Preliminary...  

Federal Register 2010, 2011, 2012, 2013, 2014

...shrimp (Penaeus vannemei), banana prawn (Penaeus merguiensis), fleshy prawn (Penaeus chinensis), giant river prawn (Macrobrachium rosenbergii), giant tiger prawn (Penaeus monodon), redspotted shrimp (Penaeus brasiliensis), southern brown...

2013-06-04

152

78 FR 50379 - Certain Frozen Warmwater Shrimp From Thailand: Final Negative Countervailing Duty Determination  

Federal Register 2010, 2011, 2012, 2013, 2014

...shrimp (Penaeus vannemei), banana prawn (Penaeus merguiensis), fleshy prawn (Penaeus chinensis), giant river prawn (Macrobrachium rosenbergii), giant tiger prawn (Penaeus monodon), redspotted shrimp (Penaeus brasiliensis), southern brown...

2013-08-19

153

78 FR 33350 - Certain Frozen Warmwater Shrimp From Thailand: Preliminary Countervailing Duty Determination  

Federal Register 2010, 2011, 2012, 2013, 2014

...shrimp (Penaeus vannemei), banana prawn (Penaeus merguiensis), fleshy prawn (Penaeus chinensis), giant river prawn (Macrobrachium rosenbergii), giant tiger prawn (Penaeus monodon), redspotted shrimp (Penaeus brasiliensis), southern brown...

2013-06-04

154

75 FR 16436 - Certain Frozen Warmwater Shrimp From India: Initiation of Antidumping Duty Changed Circumstances...  

Federal Register 2010, 2011, 2012, 2013, 2014

...shrimp (Penaeus vannemei), banana prawn (Penaeus merguiensis), fleshy prawn (Penaeus chinensis), giant river prawn (Macrobrachium rosenbergii), giant tiger prawn (Penaeus monodon), redspotted shrimp (Penaeus brasiliensis), southern brown...

2010-04-01

155

76 FR 12033 - Certain Frozen Warmwater Shrimp From Thailand: Preliminary Results of Antidumping Duty...  

Federal Register 2010, 2011, 2012, 2013, 2014

...shrimp (Penaeus vannemei), banana prawn (Penaeus merguiensis), fleshy prawn (Penaeus chinensis), giant river prawn (Macrobrachium rosenbergii), giant tiger prawn (Penaeus monodon), redspotted shrimp (Penaeus brasiliensis), southern brown...

2011-03-04

156

77 FR 40574 - Certain Frozen Warmwater Shrimp From Thailand: Final Results of Antidumping Duty Administrative...  

Federal Register 2010, 2011, 2012, 2013, 2014

...shrimp (Penaeus vannemei), banana prawn (Penaeus merguiensis), fleshy prawn (Penaeus chinensis), giant river prawn (Macrobrachium rosenbergii), giant tiger prawn (Penaeus monodon), redspotted shrimp (Penaeus brasiliensis), southern brown...

2012-07-10

157

75 FR 51756 - Certain Frozen Warmwater Shrimp From India: Notice of Rescission of Antidumping Duty Changed...  

Federal Register 2010, 2011, 2012, 2013, 2014

...shrimp (Penaeus vannemei), banana prawn (Penaeus merguiensis), fleshy prawn (Penaeus chinensis), giant river prawn (Macrobrachium rosenbergii), giant tiger prawn (Penaeus monodon), redspotted shrimp (Penaeus brasiliensis), southern brown...

2010-08-23

158

75 FR 13492 - Certain Frozen Warmwater Shrimp From India: Initiation of Antidumping Duty Changed-Circumstances...  

Federal Register 2010, 2011, 2012, 2013, 2014

...shrimp (Penaeus vannemei), banana prawn (Penaeus merguiensis), fleshy prawn (Penaeus chinensis), giant river prawn (Macrobrachium rosenbergii), giant tiger prawn (Penaeus monodon), redspotted shrimp (Penaeus brasiliensis), southern brown...

2010-03-22

159

76 FR 40881 - Certain Frozen Warmwater Shrimp From Thailand: Final Results of Antidumping Duty Administrative...  

Federal Register 2010, 2011, 2012, 2013, 2014

...shrimp (Penaeus vannemei), banana prawn (Penaeus merguiensis), fleshy prawn (Penaeus chinensis), giant river prawn (Macrobrachium rosenbergii), giant tiger prawn (Penaeus monodon), redspotted shrimp (Penaeus brasiliensis), southern brown...

2011-07-12

160

77 FR 73619 - Final Results of Antidumping Duty Changed Circumstances Review: Certain Frozen Warmwater Shrimp...  

Federal Register 2010, 2011, 2012, 2013, 2014

...shrimp (Penaeus vannemei), banana prawn (Penaeus merguiensis), fleshy prawn (Penaeus chinensis), giant river prawn (Macrobrachium rosenbergii), giant tiger prawn (Penaeus monodon), redspotted shrimp (Penaeus brasiliensis), southern brown...

2012-12-11

161

77 FR 13082 - Certain Frozen Warmwater Shrimp From Thailand: Preliminary Results of Antidumping Duty...  

Federal Register 2010, 2011, 2012, 2013, 2014

...shrimp (Penaeus vannemei), banana prawn (Penaeus merguiensis), fleshy prawn (Penaeus chinensis), giant river prawn (Macrobrachium rosenbergii), giant tiger prawn (Penaeus monodon), redspotted shrimp (Penaeus brasiliensis), southern brown...

2012-03-05

162

75 FR 44229 - Certain Frozen Warmwater Shrimp from India: Preliminary Results of Antidumping Duty Changed...  

Federal Register 2010, 2011, 2012, 2013, 2014

...shrimp (Penaeus vannemei), banana prawn (Penaeus merguiensis), fleshy prawn (Penaeus chinensis), giant river prawn (Macrobrachium rosenbergii), giant tiger prawn (Penaeus monodon), redspotted shrimp (Penaeus brasiliensis), southern brown...

2010-07-28

163

Marine shrimp aquaculture and natural resource degradation in Thailand  

Microsoft Academic Search

Rising demand for shrimp in the developed nations has helped to foster a dramatic growth in marine shrimp aquaculture, particularly\\u000a in South America and South Asia. In Thailand, Marine shrimp aquaculture is now an important earmer of foreign exchange. The\\u000a growth in Production has been achieved through the expansion of the culture area and the adoption of intensive production\\u000a methods.

Mark Flaherty; Choomjet Karnjanakesorn

1995-01-01

164

Quantitative role of shrimp fecal bacteria in organic matter fluxes in a recirculating shrimp aquaculture system.  

PubMed

Microorganisms play integral roles in the cycling of carbon (C) and nitrogen (N) in recirculating aquaculture systems (RAS) for fish and shellfish production. We quantified the pathways of shrimp fecal bacterial activities and their role in C- and N-flux partitioning relevant to culturing Pacific white shrimp, Penaeus (Litopenaeus) vannamei, in RAS. Freshly produced feces from P. vannamei contained 0.6-7 × 10(10) bacteria g(-1) dry wt belonging to Bacteroidetes (7%), Alphaproteobacteria (4%), and, within the Gammaproteobacteria, almost exclusively to the genus Vibrio (61%). Because of partial disintegration of the feces (up to 27% within 12 h), the experimental seawater became inoculated with fecal bacteria. Bacteria grew rapidly in the feces and in the seawater, and exhibited high levels of aminopeptidase, chitinase, chitobiase, alkaline phosphatase, ?- and ?-glucosidase, and lipase activities. Moreover, fecal bacteria enriched the protein content of the feces within 12 h, potentially enriching the feces for the coprophagous shrimp. The bacterial turnover time was much faster in feces (1-10 h) than in mature RAS water (350 h). Thus, shrimp fecal bacteria not only inoculate RAS water but also contribute to bacterial abundance and productivity, and regulate system processes important for shrimp health. PMID:21426366

Beardsley, Christine; Moss, Shaun; Malfatti, Francesca; Azam, Farooq

2011-07-01

165

Shrimp viral diseases, import risk assessment and international trade.  

PubMed

Shrimp is an important commodity in international trade accounting for 15 % in terms of value of internationally traded seafood products which reached $102.00 billion in 2008. Aquaculture contributes to over 50 % of global shrimp production. One of the major constraints faced by shrimp aquaculture is the loss due to viral diseases like white spot syndrome, yellow head disease, and Taura syndrome. There are several examples of global spread of shrimp diseases due to importation of live shrimp for aquaculture. Though millions of tonnes of frozen or processed shrimp have been traded internationally during the last two decades despite prevalence of viral diseases in shrimp producing areas in Asia and the Americas, there is no evidence of diseases having been transmitted through shrimp imported for human consumption. The guidelines developed by the World Animal Health Organisation for movement of live animals for aquaculture, frozen crustaceans for human consumption, and the regulations implemented by some shrimp importing regions in the world are reviewed. PMID:23997438

Karunasagar, Iddya; Ababouch, Lahsen

2012-09-01

166

Risk of spread of penaeid shrimp viruses in the Americas by the international movement of live and frozen shrimp.  

PubMed

Within the past decade, viral diseases have emerged as serious economic impediments to successful shrimp farming in many of the shrimp-farming countries of the world. In the western hemisphere, the viral agents of Taura syndrome (TS) and infectious hypodermal and haematopoietic necrosis have caused serious disease epizootics throughout the shrimp-growing regions of the Americas and Hawaii, while in Asia the viral agents of white spot syndrome (WSS) and yellow head (YH) have caused pandemics with catastrophic losses. The international transfer of live shrimp for aquaculture purposes is an obvious mechanism by which the viruses have spread within and between regions in which they have occurred. Shrimp-eating gulls, other seabirds and aquatic insects may also be factors in the spread of shrimp viruses between and within regions. Another potentially important mechanism for the international spread of these pathogens is the trade in frozen commodity shrimp, which may contain viruses exotic to the importing countries. The viral agents of WSS, YH and TS have been found, and demonstrated to be infectious, in frozen shrimp imported into the United States market. Mechanisms identified for the potential transfer of virus in imported frozen products to domestic populations of cultured or wild penaeid shrimp stocks include: the release of untreated liquid or solid wastes from shrimp importing and processing plants directly into coastal waters, improper disposal of solid waste from shrimp importing and processing plants in landfills so that the waste is accessible to gulls and other seabirds, and the use of imported shrimp as bait by sports fishermen. PMID:9329114

Lightner, D V; Redman, R M; Poulos, B T; Nunan, L M; Mari, J L; Hasson, K W

1997-04-01

167

Sasa borealis Stem Extract Attenuates Hepatic Steatosis in High-Fat Diet-induced Obese Rats  

PubMed Central

The aim of the current study is to examine the improving effect of Sasa borealis stem (SBS) extract extracts on high-fat diet (HFD)-induced hepatic steatosis in rats. To determine the hepatoprotective effect of SBS, we fed rats a normal regular diet (ND), HFD, and HFD supplemented with 150 mg/kg body weight (BW) SBS extracts for five weeks. We found that the body weight and liver weight of rats in the HFD + SBS group were significantly lower than those in the HFD group. Significantly lower serum total cholesterol (TC) and triglyceride (TG) concentrations were observed in the SBS-supplemented group compared with the HFD group. We also found that the HFD supplemented with SBS group showed dramatically reduced hepatic lipid accumulation compared to the HFD alone group, and administration of SBS resulted in dramatic suppression of TG, TC in the HFD-induced fatty liver. In liver gene expression within the SBS treated group, PPAR? was significantly increased and SREBP-1c was significantly suppressed. SBS induced a significant decrease in the hepatic mRNA levels of PPAR?, FAS, ACC1, and DGAT2. In conclusion, SBS improved cholesterol metabolism, decreased lipogenesis, and increased lipid oxidation in HFD-induced hepatic steatosis in rats, implying a potential application in treatment of non-alcoholic fatty liver disease. PMID:24905748

Song, Yuno; Lee, Soo-Jung; Jang, Sun-Hee; Ha, Ji Hee; Song, Young Min; Ko, Yeoung-Gyu; Kim, Hong-Duck; Min, Wongi; Kang, Suk Nam; Cho, Jae-Hyeon

2014-01-01

168

Z Umi: A Critical Test of the formation path(s) of R Coronae Borealis Stars  

NASA Astrophysics Data System (ADS)

We request 0.5 hours of time on NIRI/Gemini North to follow up on one key aspect of our discovery of extreme 18O enrichment in hydrogen-deficient carbon stars and R Coronae Borealis (RCB) stars in the Galaxy (Clayton et al. 2005, 2007). The proposed observation would consist of a high S/N medium resolution GNIRS spectrum of the CO bands in the RCB star, Z UMi to confirm a previous marginal detection of a large abundance of 18O in it. Z UMi may be unique in possessing measurable amounts of both 18O and Li among the RCB stars. If an RCB star is found that has both a high Li abundance and a high 18O abundance, it would force a re-evaluation of the proposed scenarios for the formation of the RCB stars. The proposed Gemini observations will provide a definitive answer to whether an RCB star can have both Li and highly overabundant 18O.

Clayton, Geoffrey; Geballe, Tom

2011-02-01

169

On the origin of the Vastitas Borealis Formation in Chryse and Acidalia Planitiae, Mars  

NASA Astrophysics Data System (ADS)

The geologic history of the northern plains of Mars has been extensively debated. Specifically, the Vastitas Borealis Formation (VBF) represents an enigmatic surface unit that exhibits flow morphologies at its boundary, extensive surface fracturing, tens of thousands of small mounds, and unique crater morphologies. Here we test the hypothesis that the VBF in the region of Chryse and Acidalia Planitiae, Mars, originated through the compaction and later expulsion of fluid-laden sediments sourced from the shallow subsurface. We find that the morphological, thermophysical, and spectral properties of the VBF marginal unit, in addition to the recent identification of fine-grained sedimentary layers in the shallow subsurface, are all consistent with such a formation mechanism. Estimates of volume loss based on "collar-like" morphologies present on high-standing buttes suggest that a minimum fluid volume of ~13,500 km3 was expelled from the subsurface, making the VBF a significant ancient hydrologic reservoir on the Martian surface. This formation mechanism lends additional insight into the sedimentary and aqueous history of the northern plains of Mars and unites morphologic, spectral, thermophysical, and structural observations under one consistent formation hypothesis.

Salvatore, M. R.; Christensen, P. R.

2014-12-01

170

R CORONAE BOREALIS STARS IN M31 FROM THE PALOMAR TRANSIENT FACTORY  

SciTech Connect

We report the discovery of R Coronae Borealis (RCB) stars in the Andromeda galaxy (M31) using the Palomar Transient Factory (PTF). RCB stars are rare hydrogen-deficient, carbon-rich supergiant variables, most likely the merger products of two white dwarfs. These new RCBs, including two confirmed ones and two candidates, are the first to be found beyond the Milky Way and the Magellanic Clouds. All of M31 RCBs showed >1.5 mag irregular declines over timescales of weeks to months. Due to the limiting magnitude of our data (R Almost-Equal-To 21-22 mag), these RCB stars have R Almost-Equal-To 19.5-20.5 mag at maximum light, corresponding to M{sub R} = -4 to -5, making them some of the most luminous RCBs known. Spectra of two objects show that they are warm RCBs, similar to the Milky Way RCBs RY Sgr and V854 Cen. We consider these results, derived from a pilot study of M31 variables, as an important proof-of-concept for the study of rare bright variables in nearby galaxies with the PTF or other synoptic surveys.

Tang Sumin; Bildsten, Lars [Kavli Institute for Theoretical Physics, University of California, Santa Barbara, CA 93106 (United States); Cao Yi; Bellm, Eric; Kulkarni, Shrinivas R.; Levitan, David; Prince, Thomas A.; Sesar, Branimir [Division of Physics, Mathematics, and Astronomy, California Institute of Technology, Pasadena, CA 91125 (United States); Nugent, Peter [Computational Cosmology Center, Lawrence Berkeley National Laboratory, 1 Cyclotron Rd., Berkeley, CA 94720 (United States); Laher, Russ; Surace, Jason [Spitzer Science Center, California Institute of Technology, Pasadena, CA 91125 (United States); Masci, Frank [Infrared Processing and Analysis Center, California Institute of Technology, Pasadena, CA 91125 (United States); Ofek, Eran O. [Benoziyo Center for Astrophysics and the Helen Kimmel Center for Planetary Science, Weizmann Institute of Science, 76100 Rehovot (Israel)

2013-04-20

171

The largest gravitationally bound structures: the Corona Borealis supercluster - mass and bound extent  

NASA Astrophysics Data System (ADS)

Recent simulations of the densest portion of the Corona Borealis supercluster (A2061, A2065, A2067, and A2089) have shown virtually no possibility of extended gravitationally bound structure without inter-cluster matter. In contrast, recent analyses of the dynamics found that the clusters had significant peculiar velocities towards the supercluster centroid. In this paper we present the results of a thorough investigation of the CSC: we determine redshifts and virial masses for all eight clusters associated with the CSC; repeat the analysis of Batiste & Batuski with the inclusion of A2056 and CL1529+29; estimate the mass of the supercluster by applying the virial theorem on the supercluster scale, the caustics method, and a new procedure using the spherical collapse model (SCM) with the results of the dynamical analysis (SCM+FP); and perform a series of simulations to assess the likelihood of the CSC being a gravitationally bound supercluster. We find that the mass of the CSC is between 0.6 and 12 × 1016 h-1 M?. The dynamical analysis, caustics method and the SCM+FP indicate that the structure is collapsing, with the latter two both indicating a turn around radius of ˜12.5 h-1 Mpc. Lastly, the simulations show that with a reasonable amount of inter-cluster mass, there is likely extended bound structure in the CSC. Our results suggest that A2056, A2061, A2065, A2067, and A2089 form a gravitationally bound supercluster.

Pearson, David W.; Batiste, Merida; Batuski, David J.

2014-06-01

172

Population structure of red-cockaded woodpeckers (Picoides borealis) in south Florida: RAPDs revisited  

USGS Publications Warehouse

Six south Florida populations of the endangered red-cockaded woodpecker (Picoides borealis) were sampled to examine genetic diversity and population structure in the southernmost portion of the species' range relative to 14 previously sampled populations from throughout the species range. Random amplified polymorphic DNA (RAPD) analyses were used to evaluate the populations (n= 161 individuals, 13 primers, one band/primer). Results suggested that south Florida populations have significant among-population genetic differentiation (FST= 0.17, P < 0.000), although gene flow may be adequate to offset drift (Nm= 1.26). Comparison of Florida populations with others sampled indicated differentiation was less in Florida (FST for all populations = 0.21). Cluster analyses of all 20 populations did not reflect complete geographical predictions, although clustering of distant populations resulted in a significant correlation between genetic distance and geographical distance. Overall, results suggest populations in south Florida, similar to the remainder of the species, have low genetic diversity and high population fragmentation. Exact clustering of distant populations supports the ability of RAPDs to differentiate populations accurately. Our results further support past management recommendations that translocations of birds among geographically proximate populations is preferable to movement of birds between distant populations.

Haig, Susan M.; Bowman, R.; Mullins, Thomas D.

1996-01-01

173

Dead shrimp blues: a global assessment of extinction risk in freshwater shrimps (crustacea: decapoda: caridea).  

PubMed

We present the first global assessment of extinction risk for a major group of freshwater invertebrates, caridean shrimps. The risk of extinction for all 763 species was assessed using the IUCN Red List criteria that include geographic ranges, habitats, ecology and past and present threats. The Indo-Malayan region holds over half of global species diversity, with a peak in Indo-China and southern China. Shrimps primarily inhabit flowing water; however, a significant subterranean component is present, which is more threatened than the surface fauna. Two species are extinct with a further 10 possibly extinct, and almost one third of species are either threatened or Near Threatened (NT). Threats to freshwater shrimps include agricultural and urban pollution impact over two-thirds of threatened and NT species. Invasive species and climate change have the greatest overall impact of all threats (based on combined timing, scope and severity of threats). PMID:25807292

De Grave, Sammy; Smith, Kevin G; Adeler, Nils A; Allen, Dave J; Alvarez, Fernando; Anker, Arthur; Cai, Yixiong; Carrizo, Savrina F; Klotz, Werner; Mantelatto, Fernando L; Page, Timothy J; Shy, Jhy-Yun; Villalobos, José Luis; Wowor, Daisy

2015-01-01

174

Dead Shrimp Blues: A Global Assessment of Extinction Risk in Freshwater Shrimps (Crustacea: Decapoda: Caridea)  

PubMed Central

We present the first global assessment of extinction risk for a major group of freshwater invertebrates, caridean shrimps. The risk of extinction for all 763 species was assessed using the IUCN Red List criteria that include geographic ranges, habitats, ecology and past and present threats. The Indo-Malayan region holds over half of global species diversity, with a peak in Indo-China and southern China. Shrimps primarily inhabit flowing water; however, a significant subterranean component is present, which is more threatened than the surface fauna. Two species are extinct with a further 10 possibly extinct, and almost one third of species are either threatened or Near Threatened (NT). Threats to freshwater shrimps include agricultural and urban pollution impact over two-thirds of threatened and NT species. Invasive species and climate change have the greatest overall impact of all threats (based on combined timing, scope and severity of threats). PMID:25807292

2015-01-01

175

The complete mitochondrial genomes of the yellowleg shrimp Farfantepenaeus californiensis and the blue shrimp Litopenaeus stylirostris (Crustacea: Decapoda).  

PubMed

Mitochondria play key roles in many cellular processes. Description of penaeid shrimp genes, including mitochondrial genomes are fairly recent and some are focusing on commercially important shrimp as the Pacific shrimp Litopenaeus vannamei that is being used for aquaculture not only in America, but also in Asia. Much less is known about other Pacific shrimp such as the yellowleg shrimp Farfantepenaeus californiensis and the blue shrimp Litopenaeus stylirostris. We report the complete mitogenomes from these last two Pacific shrimp species. Long DNA fragments were obtained by PCR and then used to get internal fragments for sequencing. The complete F. californiensis and L. stylirostris mtDNAs are 15,975 and 15,988 bp long, containing the 37 common sequences and a control region of 990 and 999 bp, respectively. The gene order is identical to that of the tiger shrimp Penaeus monodon. Secondary structures for the 22 tRNAs are proposed and phylogenetic relationships for selected complete crustacean mitogenomes are included. Phylogenomic relationships among five shrimp show strong statistical support for the monophyly of the genus across the analysis. Litopenaeus species define a clade, with close relationship to Farfantepenaeus, and both clade with the sister group of Penaeus and Fenneropenaeus. PMID:20403743

Peregrino-Uriarte, Alma B; Varela-Romero, Alejandro; Muhlia-Almazán, Adriana; Anduro-Corona, Iván; Vega-Heredia, Sarahí; Gutiérrez-Millán, Luis E; De la Rosa-Vélez, Jorge; Yepiz-Plascencia, Gloria

2009-03-01

176

Abundance of Ohio shrimp (Macrobrachium ohione) and Glass shrimp (Palaemonetes kadiakensis) in the unimpounded Upper Mississippi River  

USGS Publications Warehouse

Large rivers of the United States have been altered by construction and maintenance of navigation channels, which has resulted in habitat loss and degradation. Using 7 y of Long Term Resource Monitoring Program data collected from the unimpounded upper Mississippi River, we investigated Ohio and Glass Shrimp abundance collected from four physical habitats of the unimpounded upper Mississippi River: main channel border, main channel border with wing dike, open side channel and closed side channel. Our objective was to assess associations between Ohio and Glass Shrimp abundance, environmental measurements and the four habitats to better understand the ecology of these species in a channelized river system. Ohio Shrimp were most abundant in the open side channels, while Glass Shrimp were most abundant in the main channel border wing dike habitat. Thirty-two percent of the variance in Glass Shrimp abundance was explained by year 1995, year 1998, water temperature, depth of gear deployment, Secchi disk transparency and river elevation. Approximately 8% of variation in Ohio Shrimp abundance was explained by Secchi disk transparency. Catch-per-unit-effort (CPUE) was greatest in 1998 for Glass Shrimp but lowest in 1997. Conversely, CPUE was greatest in 1996 for Ohio Shrimp and lowest in 2000. Both species exhibited inter-annual variability in CPUE. Long-term impacts of river modifications on aquatic invertebrates have not been well documented in many large, river systems and warrants further study. The findings from this study provide ecological information on Glass and Ohio Shrimp in a channelized river system.

Barko, V.A.; Hrabik, R.A.

2004-01-01

177

Protein quality of shrimp-waste meal  

Microsoft Academic Search

Protein quality of shrimp waste meal (SWM) was assessed in a balanced experiment with rats. Thirty rats were randomly divided into 5 equal treatment groups of 6 rats, kept in individual perforated perspex cages and fed 4 different 10% protein diets consisting of (1) fish meal (FM), (2) SWM, (3) SWM+lysine+methionine, (4) SWM+methionine and (5) a nitrogen-free basal diet. SWM

A. O. Fanimo; O. O. Oduguwa; A. O. Onifade; T. O. Olutunde

2000-01-01

178

Microbial flora of fresh and stored shrimp  

E-print Network

primarily by the appearance in some samples of high percentages of Bacillus, Lactobacillus and Flavobacterium species. Based upon limited data, sample preparation of shrimp by washing gave somewhat higher viable counts as compared with blending. iv AC... will consist of the following genera: Pseudomonas, Achromo- bacter Co ebacterium, Flavobacterium, Micrococcus, Bacillus and Uibrio $1, 4, 10, 12, 13, 14, 15) . The level of these bacteria depends on freshness of fish, sanitary conditions during handling...

Mroz, Eva

1970-01-01

179

Comparative advantage analysis of shrimp production in Asia  

Microsoft Academic Search

Shrimp is a fi sheries commodity of great importance in the international aquatic product trade, particularly to Asia and some South American nations. Shrimp products are a universally popular food commodity consumed through out the globe and rarely restricted by gender, age and religion etc. The USA anti- dumping case against Asian countries has brought about much public and governmental

Yuan Xinhua

2008-01-01

180

White Spot Syndrome Virus Infection of Cultured Shrimp in China  

Microsoft Academic Search

In 1993 and 1994, an epizootic of disease (white spot) occurred among cultured shrimp in China, resulting in mass mortality. During the periods of outbreak epizootiological surveys were undertaken. Based on these surveys it is known that the disease occurred among populations of cultured Penaeus chinensis, P. japonicus, and P. monodon, infecting shrimp from 2.4 cm to adult. The disease

Wen-Bin Zhan; Yuan-Hong Wang; John L. Fryer; Kai-Kang Yu; Hideo Fukuda; Qing-Xian Meng

1998-01-01

181

The nutritional requirements of the Japanese shrimp Penaeus japonicus  

Microsoft Academic Search

Penaeus japonicus is probably the best known species among penaeids or even among shrimps. In juveniles, the protein requirement was best studied and Japanese shrimp appears as the most demanding penaeid species. Some discrepan- cies remain among estimations of the protein requirement. They may be related to several factors such as energy level of the diet, digestibility or biological value

J. GUILLAUME

1989-01-01

182

CUTICULAR LESIONS INDUCED IN GRASS SHRIMP EXPOSED TO HEXAVALENT CHROMIUM  

EPA Science Inventory

Adult grass shrimp were exposed to four concentrations (0.5, 1.0, 2.0 and 4.0 ppm) of hexavalent chromium for 38 days. At the end of the exposure period, over 50% of the surviving shrimp possessed cuticular lesions that had many of the gross characteristics of 'shell disease.' Th...

183

Job Satisfaction in the Shrimp Trawl Fisheries of Vietnam  

ERIC Educational Resources Information Center

This paper investigates the job satisfaction of small-scale shrimp trawl fishers in the vicinity of Camau National Park in southern Vietnam. The research sample consisted of 77 fishers who belong to a growing population of shrimp fishers in the region. The results suggest that 60% would change their fishing metier, 78% would leave fishing for…

Sinh, Le Xuan

2012-01-01

184

Job Satisfaction in the Shrimp Trawl Fisheries of Chennai, India  

ERIC Educational Resources Information Center

Shrimp trawling represents an important fishing metier in South India, generating high levels of employment and economic value. It is also a contested metier, ostensibly contributing to environmental degradation and social inequality. This paper investigates the job satisfaction of crew members (captains and workers) on board the shrimp trawlers…

Bavinck, Maarten

2012-01-01

185

Biology, genome organization and evolution of parvoviruses in marine shrimp  

Technology Transfer Automated Retrieval System (TEKTRAN)

A number of parvoviruses are now know to infect marine shrimp, and these viruses alone or in combination with other viruses have the potential to cause major losses in shrimp aquaculture globally. This review provides a comprehensive overview of the biology, genome organization, gene expression, and...

186

The Impact of Ingredient Particle Size on Shrimp Feed  

Microsoft Academic Search

Diet ingredients consisting of a mixture of fish meal, hard red winter wheat, shrimp meal, and soybean meal were ground from an initial particle size of 603 ? to 586, 521, 408, 272,124, and 69 ? geometric mean particle diameter to evaluate their effects on pellet properties, shrimp growth and survival, and cost of grinding. Results indicated that pellet water

Leonard G. Obaldo; Warren G. Dominy; Jesse H. Terpstra; Jeffrey J. Cody; Keith C. Behnke

1999-01-01

187

Predicting shrimp growth: Artificial neural network versus nonlinear regression models  

Microsoft Academic Search

This study evaluated the potential of artificial neural networks (ANN) as an alternative to the traditional statistical regression techniques for the purpose of predicting shrimp growth in a commercial setting. Empirical data collected from a commercial shrimp farm in Hawaii was used for this evaluation. Eight regression functional forms (i.e., linear, polynomial, log reciprocal, von Bertalanffy, Gompertz, logistic and exponential)

Run Yu; PingSun Leung; Paul Bienfang

2006-01-01

188

A critical review of shrimp pond culture in the Philippines  

Microsoft Academic Search

The paper reviews and evaluates shrimp pond culture in the Philippines and its ecological and socioeconomic effects. The intertwined histories of the country's mangrove forests and culture ponds are treated in depth; brackishwater aquaculture and the different shrimp culture systems are described. Intensive farming is discussed in terms of feed and water requirements, chemical inputs and waste production, and the

J. Honculada Primavera

1993-01-01

189

Caerulein-and xenopsin-related peptides with insulin-releasing activities from skin secretions of the clawed frogs, Xenopus borealis and Xenopus amieti (Pipidae)  

Microsoft Academic Search

Caerulein-related peptides were identified in norepinephrine-stimulated skin secretions of the tetraploid frog Xenopus borealis and the octoploid frog Xenopus amieti using negative ion electrospray mass spectrometry and their primary structures determined by positive ion tandem (MS\\/MS) mass spectrometry. X. borealis caerulein-B1 (pGlu-Gln-Asp-Tyr(SO3)-Gly-Thr-Gly-Trp-Met-Asp-Phe.NH2) contains an additional Gly5 residue compared with X. laevis caerulein and caerulein-B2 (pGlu-Asp-Tyr(SO3)-Thr-Gly-Trp-Met-Asp-Phe.NH2) contains a Gln2 deletion. X.

Osama K. Zahid; Milena Mechkarska; Opeolu O. Ojo; Yasser H. A. Abdel-Wahab; Peter R. Flatt; Mohammed A. Meetani; J. Michael Conlon

2011-01-01

190

21 CFR 161.173 - Canned wet pack shrimp in transparent or nontransparent containers.  

Code of Federal Regulations, 2010 CFR

...dorsal tract, back vein, or sand vein). (ii) Deveined shrimp...not less than 95 percent by weight of shrimp prepared by removing...not less than 95 percent by weight of shrimp with no readily visible... Size Maximum percent by weight of broken shrimp a Extra...

2010-04-01

191

21 CFR 161.173 - Canned wet pack shrimp in transparent or nontransparent containers.  

Code of Federal Regulations, 2012 CFR

...dorsal tract, back vein, or sand vein). (ii) Deveined shrimp...not less than 95 percent by weight of shrimp prepared by removing...not less than 95 percent by weight of shrimp with no readily visible... Size Maximum percent by weight of broken shrimp a Extra...

2012-04-01

192

21 CFR 161.173 - Canned wet pack shrimp in transparent or nontransparent containers.  

Code of Federal Regulations, 2014 CFR

...dorsal tract, back vein, or sand vein). (ii) Deveined shrimp...not less than 95 percent by weight of shrimp prepared by removing...not less than 95 percent by weight of shrimp with no readily visible... Size Maximum percent by weight of broken shrimp a Extra...

2014-04-01

193

21 CFR 161.173 - Canned wet pack shrimp in transparent or nontransparent containers.  

Code of Federal Regulations, 2011 CFR

...dorsal tract, back vein, or sand vein). (ii) Deveined shrimp...not less than 95 percent by weight of shrimp prepared by removing...not less than 95 percent by weight of shrimp with no readily visible... Size Maximum percent by weight of broken shrimp a Extra...

2011-04-01

194

21 CFR 161.173 - Canned wet pack shrimp in transparent or nontransparent containers.  

Code of Federal Regulations, 2013 CFR

...dorsal tract, back vein, or sand vein). (ii) Deveined shrimp...not less than 95 percent by weight of shrimp prepared by removing...not less than 95 percent by weight of shrimp with no readily visible... Size Maximum percent by weight of broken shrimp a Extra...

2013-04-01

195

Valuation of shrimp ecosystem services – a case study in Leizhou City, China  

Microsoft Academic Search

The economic valuation of ecosystem services is an effective way to understand the multiple benefits provided. Effluent and other environmental problems must be properly managed if shrimp aquaculture is to achieve sustainability. Evaluation of shrimp ecosystems can facilitate voluntary improvements in the environmental performance of shrimp farms. This study evaluated shrimp ecosystem services in Leizhou City, Guangdong Province, using the

Ya-Yan Liu; Wei-Na Wang; Chun-Xiao Ou; Jin-Xuan Yuan; An-Li Wang; Hai-Sheng Jiang; Ruyong Sun

2010-01-01

196

Improved Shrimp Growout Systems for Disease Prevention and Environmental Sustainability in Asia  

Microsoft Academic Search

Although a large portion of the world's farmed shrimp is produced in Asia, shrimp culture operations do not succeed over the entire area. There have been several problems and impediments that are yet to be resolved. One of these problems is disease. Several shrimp diseases have threatened shrimp production, but the most devastating ones are the viral diseases, namely, yellow-head

Piamsak Menasveta

2002-01-01

197

78 FR 76106 - Certain Frozen Warmwater Shrimp From the People's Republic of China: Notice of Final...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Administration [A-570-893] Certain Frozen Warmwater Shrimp From the People's...subject to the order is certain frozen warmwater shrimp from the PRC...subject to the order at the time of this CCR was originally conducted...dusted shrimp. See Certain Frozen Warmwater Shrimp From...

2013-12-16

198

Marine shrimp aquaculture and natural resource degradation in Thailand  

NASA Astrophysics Data System (ADS)

Rising demand for shrimp in the developed nations has helped to foster a dramatic growth in marine shrimp aquaculture, particularly in South America and South Asia. In Thailand, Marine shrimp aquaculture is now an important earmer of foreign exchange. The growth in Production has been achieved through the expansion of the culture area and the adoption of intensive production methods. The conversion of near-shore areas to shrimp culture, however, is proving to have many consequences that impinge on the environmental integrity of coastal areas. This paper reviews the development of Thailand's marine shrimp culture industry and examines the nature of the environmental impacts that are emerging. It then discusses the implications these have for rural poor and the long-term viability of the culture industry.

Flaherty, Mark; Karnjanakesorn, Choomjet

1995-01-01

199

CO-OCCURRENCE OF WHITE SHRIMP, PENAEUS VANNAMEI, MORTALITIES AND MICROCYSTIN TOXIN IN A SOUTHEASTERN USA SHRIMP FACILITY  

Technology Transfer Automated Retrieval System (TEKTRAN)

Various freshwater and marine algal toxins are known to affect plants, fishes, mammals, and invertebrates. During recent mortality events in Texas white shrimp aquaculture ponds, water and shrimp tissue samples were analyzed for cyanobacterial toxins and found to contain microcystin-LR. Cyanoprokar...

200

Suppression of Shrimp Melanization during White Spot Syndrome Virus Infection.  

PubMed

The melanization cascade, activated by the prophenoloxidase (proPO) system, plays a key role in the production of cytotoxic intermediates, as well as melanin products for microbial sequestration in invertebrates. Here, we show that the proPO system is an important component of the Penaeus monodon shrimp immune defense toward a major viral pathogen, white spot syndrome virus (WSSV). Gene silencing of PmproPO(s) resulted in increased cumulative shrimp mortality after WSSV infection, whereas incubation of WSSV with an in vitro melanization reaction prior to injection into shrimp significantly increased the shrimp survival rate. The hemolymph phenoloxidase (PO) activity of WSSV-infected shrimp was extremely reduced at days 2 and 3 post-injection compared with uninfected shrimp but was fully restored after the addition of exogenous trypsin, suggesting that WSSV probably inhibits the activity of some proteinases in the proPO cascade. Using yeast two-hybrid screening and co-immunoprecipitation assays, the viral protein WSSV453 was found to interact with the proPO-activating enzyme 2 (PmPPAE2) of P. monodon. Gene silencing of WSSV453 showed a significant increase of PO activity in WSSV-infected shrimp, whereas co-silencing of WSSV453 and PmPPAE2 did not, suggesting that silencing of WSSV453 partially restored the PO activity via PmPPAE2 in WSSV-infected shrimp. Moreover, the activation of PO activity in shrimp plasma by PmPPAE2 was significantly decreased by preincubation with recombinant WSSV453. These results suggest that the inhibition of the shrimp proPO system by WSSV partly occurs via the PmPPAE2-inhibiting activity of WSSV453. PMID:25572398

Sutthangkul, Jantiwan; Amparyup, Piti; Charoensapsri, Walaiporn; Senapin, Saengchan; Phiwsaiya, Kornsunee; Tassanakajon, Anchalee

2015-03-01

201

DUST AROUND R CORONAE BOREALIS STARS. II. INFRARED EMISSION FEATURES IN AN H-POOR ENVIRONMENT  

SciTech Connect

Residual Spitzer/Infrared Spectrograph spectra for a sample of 31 R Coronae Borealis (RCB) stars are presented and discussed in terms of narrow emission features superimposed on the quasi-blackbody continuous infrared emission. A broad {approx}6-10 {mu}m dust emission complex is seen in the RCBs showing an extreme H-deficiency. A secondary and much weaker {approx}11.5-15 {mu}m broad emission feature is detected in a few RCBs with the strongest {approx}6-10 {mu}m dust complex. The Spitzer infrared spectra reveal for the first time the structure within the {approx}6-10 {mu}m dust complex, showing the presence of strong C-C stretching modes at {approx}6.3 and 8.1 {mu}m as well as of other dust features at {approx}5.9, 6.9, and 7.3 {mu}m, which are attributable to amorphous carbonaceous solids with little or no hydrogen. The few RCBs with only moderate H-deficiencies display the classical ''unidentified infrared bands (UIRs)'' and mid-infrared features from fullerene-related molecules. In general, the characteristics of the RCB infrared emission features are not correlated with the stellar and circumstellar properties, suggesting that the RCB dust features may not be dependent on the present physical conditions around RCB stars. The only exception seems to be the central wavelength of the 6.3 {mu}m feature, which is blueshifted in those RCBs showing also the UIRs, i.e., the RCBs with the smallest H deficiency.

Garcia-Hernandez, D. A. [Instituto de Astrofisica de Canarias, C/Via Lactea s/n, E-38200 La Laguna (Spain); Rao, N. Kameswara [543, 17th Main, IV Sector, HSR Layout, Bangalore 560102 and Indian Institute of Astrophysics, Bangalore 560034 (India); Lambert, D. L., E-mail: agarcia@iac.es, E-mail: nkrao@iiap.res.in, E-mail: dll@astro.as.utexas.edu [W. J. McDonald Observatory, University of Texas at Austin, 1 University Station, C1400, Austin, TX 78712-0259 (United States)

2013-08-20

202

Using 16O/18O to Determine the Evolutionary History of the R Coronae Borealis Stars  

NASA Astrophysics Data System (ADS)

All of the Galactic hydrogen-deficient carbon (HdC) and R Coronae Borealis (RCB) stars for which oxygen isotopic ratios can be measured, show 16O/18O < 5, values that are orders of magnitude lower than measured in other stars (the Solar value is 500). This suggests that most if not all HdC and RCB stars are highly enriched in 18O. This is an important clue to determining the evolutionary pathways of HdC and RCB stars, for which two models have been proposed: the double degenerate (white dwarf (WD) merger), and the final helium-shell flash (FF). No overproduction of 18O is expected in the FF scenario. However, some RCB stars also show characteristics, such as 13C and Lithium, seen in FF stars. Therefore, we are conducting a survey of all the RCB stars in the LMC and SMC for the characteristics of a WD merger or a FF. Most of the stars have been surveyed for 13C already, and we are also planning to survey them for Lithium. But no RCB star in the Magellanic Clouds has been observed for 18O. The Magellanic Clouds provide an unbiased, relatively complete sample of RCB stars which are at a known distance so their bolometric luminosities can be used in our stellar evolution models. This proposal is to use Gemini/Flamingos-2 to survey all of the Magellanic Cloud stars, which are cool enough to show CO bands, for the presence of 18O near 2.3 micron. This survey, combined with our stellar evolution models, will reveal the true fraction of RCB stars formed by each of the proposed scenarios.

Clayton, Geoffrey; Geballe, Tom; Welch, Douglas; Tisserand, Patrick

2014-08-01

203

Using 16O/18O to Determine the Evolutionary History of the R Coronae Borealis Stars  

NASA Astrophysics Data System (ADS)

Of the Galactic hydrogen-deficient carbon (HdC) and R Coronae Borealis (RCB) stars for which oxygen isotopic ratios can be measured, all of them show 16O/18O < 5, values that are orders of magnitude lower than measured in other stars (the Solar value is 500). This suggests that most if not all HdC and RCB stars are highly enriched in 18O. This is an important clue in determining the evolutionary pathways of HdC and RCB stars, for which two models have been proposed: the double degenerate (white dwarf (WD) merger), and the final helium-shell flash (FF). No overproduction of 18O is expected in the FF scenario. However, some RCB stars also show characteristics, such as 13C and Lithium, seen in FF stars. Therefore, we are conducting a survey all the RCB stars in the LMC and SMC for the characteristics of a WD merger or a FF. Most of the stars have been surveyed for 13C already and we plan to survey them for Lithium in the future. This proposal is to use Gemini/Flamingos-2 to survey all the stars, which are cool enough to show CO bands, for the presence of 18O near 2.3 micron. The Magellanic Clouds provide an unbiased, relatively complete sample of RCB stars which are at a known distance so their bolometric luminosities can be used in our stellar evolution models. This survey, combined with our models, will reveal the true fraction of RCB stars formed by each of the proposed scenarios.

Clayton, Geoffrey; Geballe, Tom; Welch, Douglas; Tisserand, Patrick

2013-08-01

204

R Coronae Borealis stars in the Galactic Bulge discovered by EROS-2  

E-print Network

Rare types of variable star may give unique insight into short-lived stages of stellar evolution. The systematic monitoring of millions of stars and advanced light curve analysis techniques of microlensing surveys make them ideal for discovering also such rare variable stars. One example is the R Coronae Borealis (RCB) stars, a rare type of evolved carbon-rich supergiant. We have conducted a systematic search of the EROS-2 database for the Galactic catalogue Bulge and spiral arms to find Galactic RCB stars. The light curves of $\\sim$100 million stars, monitored for 6.7 years (from July 1996 to February 2003), have been analysed to search for the main signature of RCB stars, large and rapid drops in luminosity. Follow-up spectroscopy has been used to confirm the photometric candidates. We have discovered 14 new RCB stars, all in the direction of the Galactic Bulge, bringing the total number of confirmed Galactic RCB stars to about 51. After reddening correction, the colours and absolute magnitudes of at least 9 of the stars are similar to those of Magellanic RCB stars. This suggests that these stars are in fact located in the Galactic Bulge, making them the first RCB stars discovered in the Bulge. The localisation of the 5 remaining RCBs is more uncertain: 4 are either located behind the Bulge at an estimated maximum distance of 14 kpc or have an unusual thick circumstellar shell; the other is a DY Per RCB which may be located in the Bulge, even if it is fainter than the known Magellanic DY Per. From the small scale height found using the 9 new Bulge RCBs, $61

P. Tisserand; J. B. Marquette; P. R. Wood; E. Lesquoy; J. P. Beaulieu; A. Milsztajn; C. Hamadache; C. Afonso; J. N. Albert; J. Andersen; R. Ansari; E. Aubourg; P. Bareyre; X. Charlot; C. Coutures; R. Ferlet; P. Fouqué; J. F. Glicenstein; B. Goldman; A. Gould; M. Gros; J. Haissinski; J. de Kat; L. Le Guillou; C. Loup; C. Magneville; E. Maurice; A. Maury; M. Moniez; N. Palanque-Delabrouille; O. Perdereau; Y. Rahal; J. Rich; M. Spiro; A. Vidal-Madjar; S. Zylberajch

2008-01-11

205

DISCOVERY OF BRIGHT GALACTIC R CORONAE BOREALIS AND DY PERSEI VARIABLES: RARE GEMS MINED FROM ACVS  

SciTech Connect

We present the results of a machine-learning (ML)-based search for new R Coronae Borealis (RCB) stars and DY Persei-like stars (DYPers) in the Galaxy using cataloged light curves from the All-Sky Automated Survey (ASAS) Catalog of Variable Stars (ACVS). RCB stars-a rare class of hydrogen-deficient carbon-rich supergiants-are of great interest owing to the insights they can provide on the late stages of stellar evolution. DYPers are possibly the low-temperature, low-luminosity analogs to the RCB phenomenon, though additional examples are needed to fully establish this connection. While RCB stars and DYPers are traditionally identified by epochs of extreme dimming that occur without regularity, the ML search framework more fully captures the richness and diversity of their photometric behavior. We demonstrate that our ML method can use newly discovered RCB stars to identify additional candidates within the same data set. Our search yields 15 candidates that we consider likely RCB stars/DYPers: new spectroscopic observations confirm that four of these candidates are RCB stars and four are DYPers. Our discovery of four new DYPers increases the number of known Galactic DYPers from two to six; noteworthy is that one of the new DYPers has a measured parallax and is m Almost-Equal-To 7 mag, making it the brightest known DYPer to date. Future observations of these new DYPers should prove instrumental in establishing the RCB connection. We consider these results, derived from a machine-learned probabilistic classification catalog, as an important proof-of-concept for the efficient discovery of rare sources with time-domain surveys.

Miller, A. A.; Richards, J. W.; Bloom, J. S.; Cenko, S. B.; Silverman, J. M.; Starr, D. L. [Department of Astronomy, University of California, Berkeley, CA 94720-3411 (United States); Stassun, K. G., E-mail: amiller@astro.berkeley.edu [Department of Physics and Astronomy, Vanderbilt University, Nashville, TN 37235 (United States)

2012-08-20

206

Interactions among benthic insects, algae, and bacteria in a geothermally influenced stream. [Helicopsyche borealis (Hagen)  

SciTech Connect

This dissertation examines the interactions between benthic macroinvertebrates and microorganisms in stream habitats that were exposed to varying levels of geothermal contamination. Stream microcosms were used in situ to evaluate the separate effects of the thermal and chemical components of geothermal effluents on aquatic biota in Big Sulphur Creek, a third-order stream at the Geysers. The thermal component of those effluents had greater influence than the chemical component in determining benthic community structure. The effects of grazing by the herbivorous caddisfly Helicopsyche borealis (Hagen) on benthic algae and bacteria were experimentally studied in an undisturbed segment of Big Sulphur Creek. Exclusion of Helicopsyche larvae from introduced substrates resulted in high standing crops of algae and bacteria, but a low algal turnover rate. On substrate that was grazed by natural densities of Helicopsyche larvae, algal and bacterial standing crops were reduced by 83-98%, but the turnover rate of algae was substantially increased. Thus, grazing by Helicopsyche resulted in a low-biomass algal community that, because of a high turnover rate, was able to support a high biomass of consumers. These results emphasize the importance of consumer-producer interactions in stream ecosystems; disturbance of either component during geothermal development may result in substantial changes at other trophic levels as well. Complementary studies to those summarized above include (1) comparison of introduced and natural substrates for sampling benthic organisms, (2) distributional analysis of benthic biota along a geothermal gradient, and (3) evaluation of seasonal dynamics of suspended microorganisms in three streams that have different geothermal characteristics. This dissertation concludes with a review of primary consumption patterns in aquatic insects.

Lamberti, G.A.

1983-01-01

207

THE CIRCUMSTELLAR ENVIRONMENT OF R CORONAE BOREALIS: WHITE DWARF MERGER OR FINAL-HELIUM-SHELL FLASH?  

SciTech Connect

In 2007, R Coronae Borealis (R CrB) went into a historically deep and long decline. In this state, the dust acts like a natural coronagraph at visible wavelengths, allowing faint nebulosity around the star to be seen. Imaging has been obtained from 0.5 to 500 {mu}m with Gemini/GMOS, Hubble Space Telescope/WFPC2, Spitzer/MIPS, and Herschel/SPIRE. Several of the structures around R CrB are cometary globules caused by wind from the star streaming past dense blobs. The estimated dust mass of the knots is consistent with their being responsible for the R CrB declines if they form along the line of sight to the star. In addition, there is a large diffuse shell extending up to 4 pc away from the star containing cool 25 K dust that is detected all the way out to 500 {mu}m. The spectral energy distribution of R CrB can be well fitted by a 150 AU disk surrounded by a very large diffuse envelope which corresponds to the size of the observed nebulosity. The total masses of the disk and envelope are 10{sup -4} and 2 M{sub Sun }, respectively, assuming a gas-to-dust ratio of 100. The evidence pointing toward a white dwarf merger or a final-helium-shell flash origin for R CrB is contradictory. The shell and the cometary knots are consistent with a fossil planetary nebula. Along with the fact that R CrB shows significant lithium in its atmosphere, this supports the final-helium-shell flash. However, the relatively high inferred mass of R CrB and its high fluorine abundance support a white dwarf merger.

Clayton, Geoffrey C.; Andrews, J. E. [Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803 (United States); Sugerman, Ben E. K. [Department of Physics and Astronomy, Goucher College, 1021 Dulaney Valley Rd., Baltimore, MD 21204 (United States); Adam Stanford, S. [IGPP, Lawrence Livermore National Laboratory, Livermore, CA 94551 (United States); Whitney, B. A. [Space Science Institute, 4750 Walnut St. Suite 205, Boulder, CO 80301 (United States); Honor, J.; Babler, B. [Department of Astronomy, 475 North Charter St., University of Wisconsin, Madison, WI 53706 (United States); Barlow, M. J. [Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT (United Kingdom); Gordon, K. D.; Bond, Howard E.; Matsuura, M. [STScI, 3700 San Martin Dr., Baltimore, MD 21218 (United States); Geballe, T. R. [Gemini Observatory, 670 N. A'ohoku Place, Hilo, HI 96720 (United States); De Marco, O. [Department of Physics, Macquarie University, Sydney, NSW 2109 (Australia); Lawson, W. A. [School of PEMS, University of New South Wales, ADFA, P.O. Box 7916, Canberra, ACT 2610 (Australia); Sibthorpe, B. [Max-Planck-Institut fuer Astronomie, Koenigstuhl 17, D-69117 Heidelberg (Germany); Olofsson, G. [Department of Astronomy, Stockholm University, AlbaNova University Center, Roslagstullsbacken 21, SE-10691 Stockholm (Sweden); Polehampton, E. [Space Science and Technology Department, Rutherford Appleton Laboratory, Didcot OX11 0QX (United Kingdom); Gomez, H. L.; Hargrave, P. C. [School of Physics and Astronomy, Cardiff University, 5 The Parade, Cardiff, Wales CF24 3YB (United Kingdom); Ivison, R. J., E-mail: gclayton@phys.lsu.edu, E-mail: jandrews@phys.lsu.edu, E-mail: ben.sugerman@goucher.edu, E-mail: stanford@physics.ucdavis.edu, E-mail: bwhitney@spacescience.org, E-mail: jhonor@astro.wisc.edu, E-mail: brian@astro.wisc.edu, E-mail: mjb@star.ucl.ac.uk [UK Astronomy Technology Centre, ROE, Blackford Hill, Edinburgh EH9 3HJ (United Kingdom); and others

2011-12-10

208

DO R CORONAE BOREALIS STARS FORM FROM DOUBLE WHITE DWARF MERGERS?  

SciTech Connect

A leading formation scenario for R Coronae Borealis (RCB) stars invokes the merger of degenerate He and CO white dwarfs (WDs) in a binary. The observed ratio of {sup 16}O/{sup 18}O for RCB stars is in the range of 0.3-20 much smaller than the solar value of {approx}500. In this paper, we investigate whether such a low ratio can be obtained in simulations of the merger of a CO and a He WD. We present the results of five three-dimensional hydrodynamic simulations of the merger of a double WD system where the total mass is 0.9 M{sub Sun} and the initial mass ratio (q) varies between 0.5 and 0.99. We identify in simulations with q {approx}< 0.7 a feature around the merged stars where the temperatures and densities are suitable for forming {sup 18}O. However, more {sup 16}O is being dredged up from the C- and O-rich accretor during the merger than the amount of {sup 18}O that is produced. Therefore, on the dynamical timescale over which our hydrodynamics simulation runs, an {sup 16}O/{sup 18}O ratio of {approx}2000 in the 'best' case is found. If the conditions found in the hydrodynamic simulations persist for 10{sup 6} s the oxygen ratio drops to 16 in one case studied, while in a hundred years it drops to {approx}4 in another case studied, consistent with the observed values in RCB stars. Therefore, the merger of two WDs remains a strong candidate for the formation of these enigmatic stars.

Staff, Jan. E.; Clayton, Geoffrey C.; Tohline, Joel E. [Department of Physics and Astronomy, Louisiana State University, 202 Nicholson Hall, Tower Drive, Baton Rouge, LA 70803-4001 (United States); Menon, Athira; Herwig, Falk [Department of Physics and Astronomy, University of Victoria, Victoria, BC V8P5C2 (Canada); Even, Wesley; Fryer, Chris L. [Los Alamos National Laboratory, Los Alamos, NM 87545 (United States); Motl, Patrick M. [Department of Science, Mathematics and Informatics, Indiana University Kokomo, Kokomo, IN 46904-9003 (United States); Geballe, Tom [Gemini Observatory, 670 North A'ohoku Place, Hilo, HI 96720 (United States); Pignatari, Marco [Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel (Switzerland)

2012-09-20

209

Stable hydrogen isotopes record the summering grounds of eastern red bats (Lasiurus borealis).  

PubMed

Bats face numerous threats associated with global environmental change, including the rapid expansion of wind-energy facilities, emerging infectious disease, and habitat loss. An understanding of the movement and migration patterns of these highly dispersive animals would help reveal how spatially localized the impacts from these threats are likely to be on bat populations, thus aiding in their conservation. Stable hydrogen isotope ratios (? (2)H) can be used to infer regions where bats have foraged during the summer molt season, thus allowing an assessment of summering location and distance of movement of bats sampled during other times of year. However, a major impediment to the application of ? (2)H for inference of bat movements is that the relationship between ? (2)H of bat hair and precipitation tends to be species specific and is still unknown for some key species of conservation concern. We addressed this issue by using geo-referenced museum specimens to calibrate the relationship between ? (2)H of hair (? (2)Hhair) and long-term ? (2)H of growing-season precipitation (? (2)HGSprecip) at the site of collection for eastern red bats (Lasiurus borealis), one of the main species of bats experiencing large numbers of fatalities at wind-energy facilities in North America. Based on comparison of ? (2)Hhair and ? (2)HGSprecip values for males we estimated a period of molt of June 14-August 7. Within this period, male and female red bats exhibited a significant positive relationship between ? (2)Hhair and ? (2)HGSprecip. These results establish the relationship between ? (2)Hhair and ? (2)HGSprecip for red bats, which is necessary for the use of ? (2)Hhair to infer the movement and migration patterns of this important species. These results provide a critical resource to conservation biologists working to assess the impacts of environmental change on bat populations. PMID:25337458

Pylant, Cortney L; Nelson, David M; Keller, Stephen R

2014-01-01

210

Effects of southern flying squirrels Glaucomys volans on red-cockaded woodpecker Picoides borealis reproductive success  

USGS Publications Warehouse

Anecdotal data gathered from many populations suggest that southern flying squirrel (SFS, Glaucomys volans) use of the endangered red-cockaded woodpecker's (RCW, Picoides borealis) nest and roost cavities may negatively affect RCW populations. We conducted a controlled experiment to determine the effects of SFSs on RCW reproductive success. During the 1994 and 1995 breeding seasons, SFSs were removed from 30 RCW clusters and 32 clusters served as controls. SFSs were the most frequently encountered occupants of RCW cavities and used 20-33% of RCW cavities in control and treatment clusters over both years. Treatment groups produced significantly more successful nests (??? 1 fledgling) than control groups in 1994. In 1995 however, there was no difference in the number of successful nests. In both years, RCW groups nesting in treatment clusters produced significantly more fledglings than groups in control clusters in each of four experimental areas, averaging approximately 0.7 additional fledglings per nesting group. Loss of entire clutches or broods, possibly as a result of predation or abandonment, was a major factor limiting reproduction in control groups in 1994. In contrast, differences in partial brood loss appeared to be the cause of differential fledging success in 1995 Usurpation of RCW roost cavities by SFSs may have placed greater energetic demands on RCWs for cavity defence or thermoregulation, thus reducing energy available for reproduction. Our results show that SFS use of RCW cavities during the breeding season has a significant impact on RCWs and that management of RCW populations should include activities that either minimize SFS populations in RCW clusters or limit access of SFSs to RCW cavities.

Laves, K.S.; Loeb, S.C.

1999-01-01

211

Stable hydrogen isotopes record the summering grounds of eastern red bats (Lasiurus borealis)  

PubMed Central

Bats face numerous threats associated with global environmental change, including the rapid expansion of wind-energy facilities, emerging infectious disease, and habitat loss. An understanding of the movement and migration patterns of these highly dispersive animals would help reveal how spatially localized the impacts from these threats are likely to be on bat populations, thus aiding in their conservation. Stable hydrogen isotope ratios (?2H) can be used to infer regions where bats have foraged during the summer molt season, thus allowing an assessment of summering location and distance of movement of bats sampled during other times of year. However, a major impediment to the application of ?2H for inference of bat movements is that the relationship between ?2H of bat hair and precipitation tends to be species specific and is still unknown for some key species of conservation concern. We addressed this issue by using geo-referenced museum specimens to calibrate the relationship between ?2H of hair (?2Hhair) and long-term ?2H of growing-season precipitation (?2HGSprecip) at the site of collection for eastern red bats (Lasiurus borealis), one of the main species of bats experiencing large numbers of fatalities at wind-energy facilities in North America. Based on comparison of ?2Hhair and ?2HGSprecip values for males we estimated a period of molt of June 14–August 7. Within this period, male and female red bats exhibited a significant positive relationship between ?2Hhair and ?2HGSprecip. These results establish the relationship between ?2Hhair and ?2HGSprecip for red bats, which is necessary for the use of ?2Hhair to infer the movement and migration patterns of this important species. These results provide a critical resource to conservation biologists working to assess the impacts of environmental change on bat populations. PMID:25337458

Pylant, Cortney L.; Keller, Stephen R.

2014-01-01

212

Baryonic Matter at Supercluster Scales: The case of Corona Borealis II  

NASA Astrophysics Data System (ADS)

In a recent survey at 33 GHz for baryonic matter at large scales in the Corona Borealis Supercluster (CrB-SC) of galaxies (z = 0.07) using the Very Small Array interferometer (VSA), covering 24^2, two strongs decrements in temperature (CrB-B and CrB-H) near the centre of the supercluster were detected. The amplitudes are -157+/-27 and -230+/-23?K for decrements CrB-B and CrB-H respectively. There are no known clusters of galaxies coincident with the position of either of these decrements. Monte-Carlo simulations show that only CrB-B can be produced by primary anisotropies in the Cosmic Microwave Background (CMB) radiation. To explain the origen of CrB-H, a combination of both CMB perturbations and the Sunyaev-Zel'dovich effect (SZE) is required. We explore the possibility that this SZE could be produced by warm/hot gas on superclusters scales. ROSAT images do not show X-ray emission in these regions. We study the distribution of galaxies down to r ? 20 magnitudes in CrB-SC. Our analysis reveals in the region of CrB-H an overdensity of galaxies by a factor of two with respect to nearby control fields. No evidence for a new cluster is found, but the presece of a large number of galaxies in the intercluster region is suggestive that associated gas could be at least partially responsible for the observed temperature decrement in the CMB signal. We obtained spectroscopic redshifts for a sample of these galaxies and found first evidence for a substructure in the spot region extending from z = 0.07 - 0.09. This is suggestive of a dense filamentary structure of size several tens of Mpc.

Padilla-Torres, C.; Rebolo, R.; Gutiérrez, C.; Génova-Santos, R.; Rubiño-Martín, J.; Watson, R.

2009-05-01

213

Immunization with Hypoallergens of Shrimp Allergen Tropomyosin Inhibits Shrimp Tropomyosin Specific IgE Reactivity  

PubMed Central

Designer proteins deprived of its IgE-binding reactivity are being sought as a regimen for allergen-specific immunotherapy. Although shrimp tropomyosin (Met e 1) has long been identified as the major shellfish allergen, no immunotherapy is currently available. In this study, we aim at identifying the Met e 1 IgE epitopes for construction of hypoallergens and to determine the IgE inhibitory capacity of the hypoallergens. IgE-binding epitopes were defined by three online computational models, ELISA and dot-blot using sera from shrimp allergy patients. Based on the epitope data, two hypoallergenic derivatives were constructed by site-directed mutagenesis (MEM49) and epitope deletion (MED171). Nine regions on Met e 1 were defined as the major IgE-binding epitopes. Both hypoallergens MEM49 and MED171 showed marked reduction in their in vitro reactivity towards IgE from shrimp allergy patients and Met e 1-sensitized mice, as well as considerable decrease in induction of mast cell degranulation as demonstrated in passive cutaneous anaphylaxis assay. Both hypoallergens were able to induce Met e 1-recognizing IgG antibodies in mice, specifically IgG2a antibodies, that strongly inhibited IgE from shrimp allergy subjects and Met e 1-sensitized mice from binding to Met e 1. These results indicate that the two designer hypoallergenic molecules MEM49 and MED171 exhibit desirable preclinical characteristics, including marked reduction in IgE reactivity and allergenicity, as well as ability to induce blocking IgG antibodies. This approach therefore offers promises for development of immunotherapeutic regimen for shrimp tropomyosin allergy. PMID:25365343

Wai, Christine Y. Y.; Leung, Nicki Y. H.; Ho, Marco H. K.; Gershwin, Laurel J.; Shu, Shang An; Leung, Patrick S. C.; Chu, Ka Hou

2014-01-01

214

Culture of penaeid shrimp in brackfish water ponds receiving thermal effluents  

E-print Network

shrimp experiment showed no signs of benthic populations in any stage of development in the ponds. Survival rates in the brown and pink shrimp experiment averaged 75% for the brown shrimp and 23% for the pink shrimp. Final mean length and weight... (temperature, con- ductivity, dissolved oxygen, and pH) were measured at least 6 days a week. Cold weather conditions combined with low conductivity probably posed the biggest problem in the white shrimp experiment. Survival rates in this experiment...

Fredieu, Barbara Jane

1978-01-01

215

Shrimp farming in Latin America: Current status, opportunities, challenges and strategies for sustainable development  

Microsoft Academic Search

Shrimp farming in Latin America and the Caribbean (hereinafter, LA&C) is a complex, diverse and dynamic activity, occurring in 22 out of 36 countries, producing 231,000 tons, valued at US$ 1.2 billion in 2002. Farmed shrimp represents 52% of all shrimp volumes produced regionally, and almost 18% of all shrimp and prawn (S&P, hereinafter) cultivated worldwide. Whiteleg shrimp (Litopenaeus vannamei)

Carlos G. Wurmann; Raul M. Madrid; Andre M. Brugger

2004-01-01

216

Immunoaffinity-based Mass Spectrometric Characterization of the FMRFamide-related Peptide Family in the Pericardial Organ of Cancer borealis  

PubMed Central

The tetrapeptide, FMRFamide, was first discovered in 1977 in the molluscan nervous system and was found to affect the contractile force of molluscan cardiac muscle and other muscles [1]. Since then, numerous FMRFamide-related peptides (FaRPs) have been reported in both invertebrate and vertebrate species [2-9]. We have previously reported the detection and identification of numerous FaRPs in Cancer borealis pericardial organs (POs), one of the major neurosecretory structures in the crustaceans [2-3]. Here, we have developed two immunoaffinity-based methods, immunoprecipitation (IP) and immuno-dot blot screening assay, for the enrichment of FaRPs in C. borealis POs. A combined mass spectrometry (MS)-based approach involving both matrix-assisted laser desorption/ionization Fourier transform mass spectrometry (MALDI-FTMS) and nanoscale liquid chromatography coupled to electrospray ionization quadrupole time-of-flight tandem mass spectrometry (nanoLC-ESI-QTOF MS/MS) is used for a more comprehensive characterization of the FaRP family by utilizing high mass accuracy measurement and efficient peptide sequencing. Overall, 17 FMRFamide-related peptides were identified using these two complementary immuno-based approaches. Among them, three novel peptides were reported for the first time in this study. PMID:19800311

Ma, Mingming; Sturm, Robert M.; Kutz-Naber, Kimberly K.; Fu, Qiang; Li, Lingjun

2009-01-01

217

Beyond Symbiosis: Cleaner Shrimp Clean Up in Culture  

PubMed Central

Cleaner organisms exhibit a remarkable natural behaviour where they consume ectoparasites attached to “client” organisms. While this behaviour can be utilized as a natural method of parasitic disease control (or biocontrol), it is not known whether cleaner organisms can also limit reinfection from parasite eggs and larvae within the environment. Here we show that cleaner shrimp, Lysmata amboinensis, consume eggs and larvae of a harmful monogenean parasite, Neobenedenia sp., in aquaculture. Shrimp consumed parasite eggs under diurnal (63%) and nocturnal (14%) conditions as well as infectious larvae (oncomiracidia) diurnally (26%). Furthermore, we trialled the inclusion of cleaner shrimp for preventative parasite management of ornamental fish, Pseudanthias squamipinnis, and found shrimp reduced oncomiracidia infection success of host fish by half compared to controls (held without shrimp). Fish held without cleaner shrimp exhibited pigmentation changes as a result of infection, possibly indicative of a stress response. These results provide the first empirical evidence that cleaner organisms reduce parasite loads in the environment through non-symbiotic cleaning activities. Our research findings have relevance to aquaculture and the marine ornamental trade, where cleaner shrimp could be applied for prophylaxis and control of ectoparasite infections. PMID:25706952

Militz, Thane A.; Hutson, Kate S.

2015-01-01

218

Shoreline as a controlling factor in commercial shrimp production  

NASA Technical Reports Server (NTRS)

An ecological model was developed that relates marsh detritus export and shrimp production, based on the hypothesis that the shoreline is a controlling factor in the production of shrimp through regulation of detritus export from the marsh. LANDSAT data were used to develop measurements of shoreline length and area of marsh having more than 5.0 km shoreline/sq km for the coast of Louisiana, demonstrating the capability of remote sensing to provide important geographic information. These factors were combined with published tidal ranges and salinities to develop a mathematical model that predicted shrimp production for nine geographic units of the Louisiana coast, as indicated by the long term average commercial shrimp yield. The mathematical model relating these parameters and the shrimp production is consistent with an energy flow model describing the interaction of detritus producing marshlands with shrimp nursery grounds and inshore shrimping areas. The analysis supports the basic hypothesis and further raises the possibility of applications to coastal zone management requirements.

Faller, K. H. (principal investigator)

1978-01-01

219

Optimum cooking conditions for shrimp and Atlantic salmon.  

PubMed

The quality and safety of a cooked food product depends on many variables, including the cooking method and time-temperature combinations employed. The overall heating profile of the food can be useful in predicting the quality changes and microbial inactivation occurring during cooking. Mathematical modeling can be used to attain the complex heating profile of a food product during cooking. Studies were performed to monitor the product heating profile during the baking and boiling of shrimp and the baking and pan-frying of salmon. Product color, texture, moisture content, mass loss, and pressed juice were evaluated during the cooking processes as the products reached the internal temperature recommended by the FDA. Studies were also performed on the inactivation of Salmonella cocktails in shrimp and salmon. To effectively predict inactivation during cooking, the Bigelow, Fermi distribution, and Weibull distribution models were applied to the Salmonella thermal inactivation data. Minimum cooking temperatures necessary to destroy Salmonella in shrimp and salmon were determined. The heating profiles of the 2 products were modeled using the finite difference method. Temperature data directly from the modeled heating profiles were then used in the kinetic modeling of quality change and Salmonella inactivation during cooking. The optimum cooking times for a 3-log reduction of Salmonella and maintaining 95% of quality attributes are 100, 233, 159, 378, 1132, and 399 s for boiling extra jumbo shrimp, baking extra jumbo shrimp, boiling colossal shrimp, baking colossal shrimp, baking Atlantic salmon, and pan frying Atlantic Salmon, respectively. PMID:23387897

Brookmire, Lauren; Mallikarjunan, P; Jahncke, M; Grisso, R

2013-02-01

220

Tracking down R Coronae Borealis stars from their mid-infrared WISE colours  

NASA Astrophysics Data System (ADS)

Context. R Coronae Borealis stars (RCBs) are hydrogen-deficient and carbon-rich supergiant stars. They are very rare, with only ~50 actually known in our Galaxy. Interestingly, RCBs are strongly suspected of being the evolved merger product of two white dwarfs and could therefore be an important tool for understanding supernovae type Ia in the double degenerate scenario. Constraints on the spatial distribution and the formation rate of such stars are needed to picture their origin and test it in the context of actual population synthesis results. Aims: It is crucial to increase the number of known RCBs significantly. With an absolute magnitude MV ~ -5 and a bright/hot circumstellar shell made of amorphous carbon grains, RCBs are so distinctive that we should nowadays be able to find them everywhere in our Galaxy using publicly available catalogues. In the optical, the search is difficult because RCBs are known to undergo unpredictable photometric declines; however, mono-epoch mid-infrared data can help us to discriminate RCBs among other dust-producing stars. The aim is to produce from the mid-infrared WISE and near-infrared 2MASS catalogues a new catalogue of reasonable size, enriched with RCB stars. Methods: Colour-colour cuts used on all stars detected are the main selection criteria. The selection efficiency was monitored using the 52 known RCBs located in the sky area covered by the WISE first preliminary data release. Results: It has been found that selection cuts in mid-infrared colour-colour diagrams are a very efficient method of distinguishing RCBs from other stars. An RCB enriched catalogue made of only 1602 stars was produced, with a high detection efficiency of about 77%. Spectral energy distributions of 49 known RCBs and 5 known HdCs are also presented with estimates of their photosphere and circumstellar shell temperatures. Conclusions: The newly released WISE all sky catalogue has proven to be a valuable resource in finding RCB stars. Actual scenarios predict that between 100 and 500 RCBs exist in our Galaxy. The newly created RCB enriched catalogue is an important step towards significantly increasing the number of known RCB stars and therefore better understanding their origin. Tables 3-5 ara available in electronic form at http://www.aanda.orgFull Table 5 is only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/539/A51

Tisserand, P.

2012-03-01

221

An XMM-Newton Study of the Coronae of ?2 Coronae Borealis  

NASA Astrophysics Data System (ADS)

We present results of XMM-Newton Guaranteed Time observations of the RS CVn binary ?2 Coronae Borealis. The spectra obtained with the Reflection Grating Spectrometers and the European Photon Imaging Camera MOS2 were simultaneously fitted with collisional ionization equilibrium plasma models to determine coronal abundances of various elements. Contrary to the solar first ionization potential (FIP) effect, in which elements with a low FIP are overabundant in the corona compared to the solar photosphere, and contrary to the ``inverse'' FIP effect observed in several active RS CVn binaries, coronal abundance ratios in ?2 CrB show a complex pattern, as supported by similar findings in the Chandra HETGS analysis of ?2 CrB with a different methodology by Osten and coworkers in 2003. Low-FIP elements (<10 eV) have abundance ratios relative to Fe that are consistent with the solar photospheric ratios, whereas high-FIP elements have abundance ratios that increase with increasing FIP. We find that the coronal Fe abundance is consistent with the stellar photospheric value, indicating that there is no metal depletion in ?2 CrB. However, we obtain a higher Fe absolute abundance than Osten and coworkers did. Except for Ar and S, our absolute abundances are about 1.5 times larger than those reported by Osten and coworkers. However, a comparison of their model with our XMM-Newton data (and vice versa) shows that both models work adequately in general. We find, therefore, no preference for one methodology over the other for deriving coronal abundances. Despite the systematic discrepancy in absolute abundances, our abundance ratios are very close to those obtained by Osten and coworkers. Finally, we confirm the measurement of a low density in O VII (<4×1010 cm-3) but could not confirm the higher densities measured in spectral lines formed at higher temperatures that were derived by other studies of ?2 CrB due to the lower spectral resolution of the XMM-Newton grating spectrometers.

Suh, Jin A.; Audard, Marc; Güdel, Manuel; Paerels, Frederik B. S.

2005-09-01

222

Baryonic Matter at Supercluster Scales: The Case of the Corona Borealis Supercluster  

NASA Astrophysics Data System (ADS)

In a 24deg2 survey for baryonic matter at 33GHz in the Corona Borealis supercluster (CrB-SC) of galaxies (z=0.07), with the Very Small Array (VSA) interferometer (Génova-Santos et al. 2005, MNRAS 363, 79; 2008, arXiv: 0804.0199), we found a very strong temperature decrement in the Cosmic Microwave Background (CMB). It has an amplitude of-230±23?K and is located near the center of the supercluster, in a position with no known galaxy clusters, and without a significant X-ray emission in the ROSAT All-Sky Survey. Monte-Carlo simulations discard the primordial CMB Gaussian field as a possible explanation for this decrement at a level of 99.6%. We therefore concluded that this could be indicative of a Sunyaev-Zel'dovich (SZ) effect produced either by a warm/hot gas distribution in the intercluster medium or by a farther unknown galaxy cluster. Here we present an optical study of the galaxy distribution in this region, aiming at elucidating whether it traces a possible warm/hot gas filamentary distribution or a galaxy cluster. First, we have studied the galaxy population down to r?20 magnitudes in the SDSS. This reveals an overdensity by a factor of 2 with respect to nearby control fields, but lower than in the galaxy clusters member of the CrB-SC. This indicates that the associated gas could at least be partially responsible for the observed CMB decrement. Second, we obtained spectroscopic redshifts, with the William Herschel Telescope (WHT), for a sample of galaxies in the region of the cold spot, and found evidence of a substructure with redshifts extending from 0.07 to 0.10. This suggests the existence of a dense filamentary structure with a length of several tens of Mpc. Finally, we investigated the presence of at least one farther cluster in the same line-of-sight, at z?0.11.

Padilla-Torres, Carmen Pilar; Rebolo, Rafael; Gutiérrez, Carlos M.; Génova-Santos, Ricardo; Rubiño-Martin, José Alberto

223

COMPARISON OF CARBON AND NITROGEN FLUXES IN TIDEFLAT FOOD WEBS DOMINATED BY BURROWING SHRIMP OR BY CULTURED OYSTERS  

EPA Science Inventory

Two species of indigenous, thalassinid burrowing shrimps are pests to the benthic culture of Pacific oysters (Crassostrea gigas) because deposition of sediment excavated by the shrimps buries or smothers the oysters. Carbaryl pesticide is used to reduce burrowing shrimp densitie...

224

78 FR 19639 - Certain Frozen Warmwater Shrimp From India and Thailand: Notice of Initiation of Antidumping Duty...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Certain Frozen Warmwater Shrimp From India and Thailand: Notice of Initiation of...frozen warmwater shrimp (shrimp) from India and Thailand. The anniversary month of...David Crespo at (202) 482-3693 (India) and Blaine Wiltse (202)...

2013-04-02

225

76 FR 23277 - Certain Frozen Warmwater Shrimp From Brazil, India, the People's Republic of China, Thailand, and...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Certain Frozen Warmwater Shrimp From Brazil, India, the People's Republic of China, Thailand...warmwater shrimp from Brazil, Ecuador, India, the People's Republic of China...warmwater shrimp from Brazil, the PRC, India, Thailand, and Vietnam, in which...

2011-04-26

226

75 FR 53947 - Certain Frozen Warmwater Shrimp From Brazil, India, the People's Republic of China, Thailand, and...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Certain Frozen Warmwater Shrimp From Brazil, India, the People's Republic of China, Thailand...warmwater shrimp from Brazil, Ecuador, India, the People's Republic of China, Thailand...Frozen and Canned Warmwater Shrimp From India, 69 FR 76916 (December 23,...

2010-09-02

227

INFECTIVITY OF METARHIZIUM ANISOPLIAE IN GRASS SHRIMP EMBRYOS  

EPA Science Inventory

Developing embryos of the estuarine grass shrimp, Palaemonetes pugio, were exposed to Metarhizium anisopliae conidiospores. Attachment of conidiospores was often followed by germination and outgrowth on embryo surface. Penetration of the embryonic envelopes by M. anisopliae allow...

228

MAPPING BURROWING SHRIMP AND SEAGRASS IN YAQUINA ESTUARY  

EPA Science Inventory

Burrowing shrimp and seagrasses create extensive intertidal and shallow subtidal habitats within Pacific NW estuaries. Maps of their populations are useful to inform estuarine managers of locations that deserve special consideration for conservation, and to inform oyster farmers...

229

DISSOLVED AIR FLOTATION TREATMENT OF GULF SHRIMP CANNERY WASTEWATER  

EPA Science Inventory

This study reports on the operation of a plant scale dissolved air flotation system installed to define and evaluate attainable shrimp cannery wastewater treatment levels. The system was operated in all three modes of DAF pressurization. Destabilizing coagulants investigation inc...

230

Shoreline as a controlling factor in commercial shrimp production  

NASA Technical Reports Server (NTRS)

The author has identified the following significant results. An ecological model was developed that relates marsh detritus export and shrimp production. It was based on the hypothesis that the shoreline is a controlling factor in the production of shrimp through regulation of detritus export from the marsh. LANDSAT data were used to develop measurement of shoreline length and areas of marsh having more than 5.0 kilometers of shoreline per square kilometer of area for the Louisiana coast, demonstrating the capability of remote sensing to provide important geographic information. These factors were combined with published tidal ranges and salinities to develop a mathematical model that predicted shrimp production for nine geographic units of the Louisiana coast, as indicated by the long term average commercial shrimp yield.

Faller, K. H. (principal investigator)

1979-01-01

231

Antimicrobial Interventions to Reduce Listeria spp. Contamination on Shrimp  

E-print Network

The effects of selected antimicrobials, applied singularly or in combination, and frozen or refrigerated storage conditions on the survival of Listeria spp. on inoculated shrimp was evaluated in this study. A combination of 0.5% CPC (Cetylpyridinium...

Wong, Tsui-Yin

2010-01-14

232

EENY-220 Terrestrial Amphipods or “Lawn Shrimp ” (Crustacea:  

E-print Network

Amphipods comprise an order of crustacea, shrimp-like in form, which contains mostly marine and freshwater forms. While some species are terrestrial, they still require moist habitats. These terrestrial species are sometimes referred to

Amphipoda Talitridae; Thomas R. Fasulo

233

GENETIC CHARACTERIZATION OF A BURROWING SHRIMP (NEOTRYPAEA CALIFORNIENSIS)  

EPA Science Inventory

Ghost shrimp, (Neotypaea californiensis) are burrowers, whose bioturbation and sediment destabilizations have a negative effect on mariculture of the commercially important oyster (Crassostrea gigas). Oyster farmers in Washington and Oregon estuaries have been poisoning these shr...

234

77 FR 29586 - Sea Turtle Conservation; Shrimp Trawling Requirements; Correction  

Federal Register 2010, 2011, 2012, 2013, 2014

...Atmospheric Administration 50 CFR Part 223 RIN 0648-BC10 Sea Turtle Conservation; Shrimp Trawling Requirements; Correction AGENCY...and wing nets (butterfly trawls) rigged for fishing to use turtle excluder devices (TEDs) in their nets, and announced...

2012-05-18

235

Detection of virus in shrimp using digital color correlation  

NASA Astrophysics Data System (ADS)

Detection of virus in shrimp tissue using digital color correlation is presented. Phase filters in three channels (red, green and blue) were used in order to detect HPV virus like target. These first results obtained showed that is possible to detect virus in shrimp tissue. More research must be made with color correlation in order to consider natural morphology of the virus, color, scale and rotation and noise in the samples.

Alvarez-Borrego, Josue; Chavez-Sanchez, Cristina; Bueno-Ibarra, Mario A.

1999-07-01

236

Effect of Fucoidan on Disease Resistance of Black Tiger Shrimp  

Microsoft Academic Search

Oral administration of crude fucoidan (CF) extracted from Sargassum polycystum can reduce the impact of White Spot Syndrome virus (WSSV) infection in Penaeus monodon. Crude fucoidan mixed with diet for shrimps weighing of 5–8 and 12–15 g was fed before and after WSSV infection. After 10 days of infection, the maximum survival rates of shrimps of 5–8 and 12–15 g

Wilaiwan Chotigeat; Suprapa Tongsupasupbsu; Kidchakan Supamataya; Amornrat Phongdara

2004-01-01

237

An environmental simulation of a shrimp mariculture pond  

E-print Network

AN ENVIRONMENTAL SIMULATION OF A SHRIMP MARICULTURE POND A Thesis JOHV LEE ttHITSO'V Submitted to the Office of Oraduate Studies of Texas AA-. M I. niversity in partial fulfillment of the reqmrements for the degree of MASTER OF SCIEVCE... December 1989 lfajor Subject: SVildlife and Fisheries Sciences AN ENVIRONMENTAL SIMULATION OF A SHRIMP MARICULTURE POND A Thesis by JOHV LEE O'HITSOV Approved as to style and content by: A. Lawrence (Co-Chair of Committee) Ora, nt (Co...

Whitson, John Lee

1989-01-01

238

Diurnal and nocturnal catchability of Kuwait's commercial shrimps  

Microsoft Academic Search

In descending order of importance, the shrimps Penaeus semisulcatus De Haan, 1844; Metapenaeus affinis (H. Milne-Edwards, 1837); and Parapenaeopsis stylifera (H. Milne-Edwards, 1837) account for over 95% of Kuwait's commercial landings. Throughout its range, P. semisulcatus is nocturnal, but Kuwait trawlers are active 24h a day during season. Historically, all scientific shrimp surveys in Kuwait have been conducted during daylight

J. M. Bishop; Y. Ye; A. H. Alsaffar; H. M. Al-Foudari; S. Al-Jazzaf

2008-01-01

239

Variation of shrimp texture with rigor-mortis  

E-print Network

t '' t tissue pH. Possibly different levels of lactic acid affected the pH of freshly caught shrimp, depending on the amount of struggle before death. The pH of shrimp during postmortem aging was probably infuenced by the amount of glycogen remaining... viii INTRODUCTION. LITERATURE REVIEW. Relationship of Texture and Rigor-Mortis. . Other Factors Affecting Texture. Warner-Bratzler Shear. EXPERIMENTAL 10 Materials. 10 Methods. 12 RESULTS AND DISCUSSION. 21 Postmortem pH. 21 The Duration...

Wilaichon, Wunwiboon

1976-01-01

240

75 FR 75965 - Certain Frozen Warmwater Shrimp From the Socialist Republic of Vietnam: Final Results of the...  

Federal Register 2010, 2011, 2012, 2013, 2014

...shrimp (Penaeus vannemei), banana prawn (Penaeus merguiensis), fleshy prawn (Penaeus chinensis), giant river prawn (Macrobrachium rosenbergii), giant tiger prawn (Penaeus monodon), redspotted shrimp (Penaeus brasiliensis), southern brown...

2010-12-07

241

76 FR 64307 - Certain Frozen Warmwater Shrimp From the Socialist Republic of Vietnam: Amended Final Results and...  

Federal Register 2010, 2011, 2012, 2013, 2014

...shrimp (Penaeus vannemei), banana prawn (Penaeus merguiensis), fleshy prawn (Penaeus chinensis), giant river prawn (Macrobrachium rosenbergii), giant tiger prawn (Penaeus monodon), redspotted shrimp (Penaeus brasiliensis), southern brown...

2011-10-18

242

75 FR 36635 - Certain Frozen Warmwater Shrimp From the Socialist Republic of Vietnam: Rescission of New Shipper...  

Federal Register 2010, 2011, 2012, 2013, 2014

...shrimp (Penaeus vannemei), banana prawn (Penaeus merguiensis), fleshy prawn (Penaeus chinensis), giant river prawn (Macrobrachium rosenbergii), giant tiger prawn (Penaeus monodon), redspotted shrimp (Penaeus brasiliensis), southern brown...

2010-06-28

243

75 FR 49889 - Notice of Final Results of Antidumping Duty Changed-Circumstances Review: Frozen Warmwater Shrimp...  

Federal Register 2010, 2011, 2012, 2013, 2014

...shrimp (Penaeus vannemei), banana prawn (Penaeus merguiensis), fleshy prawn (Penaeus chinensis), giant river prawn (Macrobrachium rosenbergii), giant tiger prawn (Penaeus monodon), redspotted shrimp (Penaeus brasiliensis), southern brown...

2010-08-16

244

76 FR 30648 - Frozen Warmwater Shrimp From the Socialist Republic of Vietnam: Final Results of Antidumping Duty...  

Federal Register 2010, 2011, 2012, 2013, 2014

...shrimp (Penaeus vannemei), banana prawn (Penaeus merguiensis), fleshy prawn (Penaeus chinensis), giant river prawn (Macrobrachium rosenbergii), giant tiger prawn (Penaeus monodon), redspotted shrimp (Penaeus brasiliensis), southern brown...

2011-05-26

245

76 FR 45775 - Fourth New Shipper Review of Certain Frozen Warmwater Shrimp From the Socialist Republic of...  

Federal Register 2010, 2011, 2012, 2013, 2014

...shrimp (Penaeus vannemei), banana prawn (Penaeus merguiensis), fleshy prawn (Penaeus chinensis), giant river prawn (Macrobrachium rosenbergii), giant tiger prawn (Penaeus monodon), redspotted shrimp (Penaeus brasiliensis), southern brown...

2011-08-01

246

Decline and Local Extinction of Caribbean Eusocial Shrimp  

PubMed Central

The tropical shrimp genus Synalpheus includes the only eusocial marine animals. In much of the Caribbean, eusocial species have dominated the diverse fauna of sponge-dwelling shrimp in coral rubble for at least the past two decades. Here we document a recent, dramatic decline and apparent local extinction of eusocial shrimp species on the Belize Barrier Reef. Our collections from shallow reefs in central Belize in 2012 failed to locate three of the four eusocial species formerly abundant in the area, and showed steep declines in colony size and increases in frequency of queenless colonies prior to their disappearance. Concordant with these declines, several nonsocial, pair-forming Synalpheus species increased in frequency. The decline in eusocial shrimp is explained in part by disappearance of two sponge species on which they specialize. Eusocial shrimp collections from Jamaica in 2012 showed similar patterns of decline in colony size and increased queenlessness compared with prior Jamaican collections. The decline and local extinction of eusocial shrimp happened against a backdrop of changes in coral assemblages during recent decades, and may reflect changes in abundance and quality of dead coral substratum and succession of the diverse cryptic organisms living within it. These changes document potentially worrisome declines in a unique taxon of eusocial marine animals. PMID:23418429

Duffy, J. Emmett; Macdonald III, Kenneth S.; Hultgren, Kristin M.; Chak, Tin Chi Solomon; Rubenstein, Dustin R.

2013-01-01

247

Decline and local extinction of Caribbean eusocial shrimp.  

PubMed

The tropical shrimp genus Synalpheus includes the only eusocial marine animals. In much of the Caribbean, eusocial species have dominated the diverse fauna of sponge-dwelling shrimp in coral rubble for at least the past two decades. Here we document a recent, dramatic decline and apparent local extinction of eusocial shrimp species on the Belize Barrier Reef. Our collections from shallow reefs in central Belize in 2012 failed to locate three of the four eusocial species formerly abundant in the area, and showed steep declines in colony size and increases in frequency of queenless colonies prior to their disappearance. Concordant with these declines, several nonsocial, pair-forming Synalpheus species increased in frequency. The decline in eusocial shrimp is explained in part by disappearance of two sponge species on which they specialize. Eusocial shrimp collections from Jamaica in 2012 showed similar patterns of decline in colony size and increased queenlessness compared with prior Jamaican collections. The decline and local extinction of eusocial shrimp happened against a backdrop of changes in coral assemblages during recent decades, and may reflect changes in abundance and quality of dead coral substratum and succession of the diverse cryptic organisms living within it. These changes document potentially worrisome declines in a unique taxon of eusocial marine animals. PMID:23418429

Duffy, J Emmett; Macdonald, Kenneth S; Hultgren, Kristin M; Chak, Tin Chi Solomon; Rubenstein, Dustin R

2013-01-01

248

Comparative spring mechanics in mantis shrimp.  

PubMed

Elastic mechanisms are fundamental to fast and efficient movements. Mantis shrimp power their fast raptorial appendages using a conserved network of exoskeletal springs, linkages and latches. Their appendages are fantastically diverse, ranging from spears to hammers. We measured the spring mechanics of 12 mantis shrimp species from five different families exhibiting hammer-shaped, spear-shaped and undifferentiated appendages. Across species, spring force and work increase with size of the appendage and spring constant is not correlated with size. Species that hammer their prey exhibit significantly greater spring resilience compared with species that impale evasive prey ('spearers'); mixed statistical results show that species that hammer prey also produce greater work relative to size during spring loading compared with spearers. Disabling part of the spring mechanism, the 'saddle', significantly decreases spring force and work in three smasher species; cross-species analyses show a greater effect of cutting the saddle on the spring force and spring constant in species without hammers compared with species with hammers. Overall, the study shows a more potent spring mechanism in the faster and more powerful hammering species compared with spearing species while also highlighting the challenges of reconciling within-species and cross-species mechanical analyses when different processes may be acting at these two different levels of analysis. The observed mechanical variation in spring mechanics provides insights into the evolutionary history, morphological components and mechanical behavior, which were not discernible in prior single-species studies. The results also suggest that, even with a conserved spring mechanism, spring behavior, potency and component structures can be varied within a clade with implications for the behavioral functions of power-amplified devices. PMID:23239886

Patek, S N; Rosario, M V; Taylor, J R A

2013-04-01

249

High-Resolution Optical Spectroscopy of the R Coronae Borealis Star V532 Ophiuchi at Maximum Light  

NASA Astrophysics Data System (ADS)

High-resolution optical spectra of the R Coronae Borealis (RCB) star V532 Oph at light maximum are discussed. The absolute visual magnitude MV of the star is found to be -4.9 ± 0.5. The elemental abundances suggest the star belongs to the majority class of RCB stars but is among the most O-poor of this class with mild enhancements of heavy elements Y, Zr, Ba, and La. The C2 Swan bands are weak in V532 Oph relative to R CrB. Other aspects of the high-resolution spectrum confirm that V532 Oph is representative of majority RCBs, i.e., the radial velocity is variable, circumstellar material is present, and the photosphere feeds a high-velocity stellar wind.

Kameswara Rao, N.; Lambert, David L.; Woolf, Vincent M.; Hema, B. P.

2014-10-01

250

Energetic consequences of flight speeds of foraging red and hoary bats (Lasiurus borealis and Lasiurus cinereus; Chiroptera: Vespertilionidae)  

PubMed

We used Doppler radar readings of the flight speeds of foraging, lactating female Lasiurus borealis (N=826) and Lasiurus cinereus (N=544) to test morphologically based predictions about their flight performance. Both species flew at speeds (V=6.7 and 7.7 m s-1, respectively) that differed significantly from predicted minimum power speed (Vmp; 4.0 and 5.08 m s-1, respectively) or predicted maximum range speed (Vmr; 5.25 and 6.69 m s-1, respectively), perhaps reflecting the active pursuit of moths performing evasive manoeuvres. Estimates of costs of flight and lactation are combined with data on prey size together with encounter and capture rates to illustrate the energetic benefits accruing to these species when they forage in concentrations of insects. PMID:9320162

Salcedo; Fenton; Hickey; Blake

1995-01-01

251

ENHANCED ORGANIC MATTER REMINERALIZATION AND NUTRIENT TURNOVER BY POPULATIONS OF BURROWING SHRIMP IN YAQUINA BAY, OR  

EPA Science Inventory

Burrowing, or thalassinid, shrimp structure large areas of intertidal habitat of Pacific Northwest estuaries. This field study utilized a combination of anoxic incubations, porewater dialysis peepers, and benthic chambers to quantify the role of burrowing shrimp species on OM dec...

252

RESPONSE OF GHOST SHRIMP (NEOTRYPAEA CALIFORNIENSIS) BIOTURBATION TO ORGANIC MATTER ENRICHMENT OF ESTUARINE INTERTIDAL SEDIMENTS  

EPA Science Inventory

Populations of burrowing shrimp (Neotrypaea californiensis and Upogebia p;ugettensis) are the dominant invertebrate fauna on Pacific estuarine tide flats, occupying >80% of intertidal area in some estuaries. Burrowing shrimp are renowned for their bioturbation of intertidal sedi...

253

Disease resistance of Pacific white shrimp, Litopenaeus vannamei, following the dietary  

E-print Network

to Schizophyllum commune glucan significantly increased resistance against white spot syndrome virus (WSSVDisease resistance of Pacific white shrimp, Litopenaeus vannamei, following the dietary for its impact on disease resistance in the Pacific white shrimp, Litopenaeus vannamei. Animals were fed

Burnett, Louis E.

254

40 CFR 408.90 - Applicability; description of the non-remote Alaskan shrimp processing subcategory.  

Code of Federal Regulations, 2010 CFR

...non-remote Alaskan shrimp processing subcategory. 408.90... CANNED AND PRESERVED SEAFOOD PROCESSING POINT SOURCE CATEGORY...discharges resulting from the processing of shrimp in non-remote Alaska. The effluent...

2010-07-01

255

40 CFR 408.100 - Applicability; description of the remote Alaskan shrimp processing subcategory.  

Code of Federal Regulations, 2010 CFR

...the remote Alaskan shrimp processing subcategory. 408.100...STANDARDS CANNED AND PRESERVED SEAFOOD PROCESSING POINT SOURCE CATEGORY ...discharges resulting from the processing of shrimp in remote Alaska. The effluent...

2010-07-01

256

76 FR 16384 - Certain Frozen Warmwater Shrimp From the Socialist Republic of Vietnam: Initiation of Antidumping...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Frozen Warmwater Shrimp From the Socialist Republic of Vietnam: Initiation of Antidumping Duty New Shipper Review...shrimp'') from the Socialist Republic of Vietnam (``Vietnam''), received on February 28, 2011, meets...

2011-03-23

257

78 FR 72635 - Certain Frozen Warmwater Shrimp From the Socialist Republic of Vietnam: Rescission of Antidumping...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Frozen Warmwater Shrimp From the Socialist Republic of Vietnam: Rescission of Antidumping Duty New Shipper Review...frozen warmwater shrimp from the Socialist Republic of Vietnam (``Vietnam'') covering the period February 1, 2013...

2013-12-03

258

78 FR 59650 - Certain Frozen Warmwater Shrimp From the Socialist Republic of Vietnam: Initiation of Antidumping...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Frozen Warmwater Shrimp From the Socialist Republic of Vietnam: Initiation of Antidumping Duty New Shipper Review...frozen warmwater shrimp from the Socialist Republic of Vietnam (``Vietnam'') meets the statutory and regulatory...

2013-09-27

259

75 FR 60730 - Certain Frozen Warmwater Shrimp From the Socialist Republic of Vietnam: Initiation of Antidumping...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Frozen Warmwater Shrimp From the Socialist Republic of Vietnam: Initiation of Antidumping Duty New Shipper Review...shrimp'') from the Socialist Republic of Vietnam (``Vietnam''), received on August 26, 2010, meets the...

2010-10-01

260

78 FR 54912 - Frozen Warmwater Shrimp from Indonesia and Thailand; Termination of Investigations  

Federal Register 2010, 2011, 2012, 2013, 2014

...Final)] Frozen Warmwater Shrimp from Indonesia and Thailand; Termination of Investigations...the subject investigations concerning Indonesia (78 FR 50379) and Thailand (78 FR...concerning frozen warmwater shrimp from Indonesia and Thailand (investigation Nos....

2013-09-06

261

MORE THAN JUST BAIT: BURROWING SHRIMP AS ECOSYSTEM ENGINEERS IN OREGON ESTUARIES - SEPTEMBER 2006  

EPA Science Inventory

Burrowing shrimp may be most widely known as excellent fishing bait, but they also play important roles in estuaries of the Pacific Northwest. These shrimps strongly affect carbon and nutrient cycling, phytoplankton abundance, food web structure and dynamics, sediment stability,...

262

Cleavage and gastrulation in the shrimp Penaeus (Litopenaeus) vannamei (Malacostraca, Decapoda, Dendrobranchiata)  

E-print Network

Cleavage and gastrulation in the shrimp Penaeus (Litopenaeus) vannamei (Malacostraca, Decapoda most malacostracan crustaceans develop through superficial cleavage, in the Amphipoda, Euphausiacea, and Dendrobranchiata (Decapoda) cleavage is complete. Euphausiaceans and dendrobranchiate shrimp share a similar early

Hertzler, Philip L.

263

Quality perceptions of stakeholders in Beninese export-oriented shrimp chain.  

PubMed

In recent years, the Beninese shrimp sector has faced a ban on export to the European Union due to lack of compliance with food safety standards. The present study aimed at obtaining insight into the factors that determine shrimp quality and safety in Benin. A survey was conducted to investigate the relationships between stakeholders, the conditions under which shrimps are handled at fishing areas and processed at shrimp plants, and the stakeholders' perceptions of quality. A total of 325 fishermen, 128 intermediate traders, 12 collectors, and 3 shrimp processing plant managers were interviewed face to face. The results showed that various specific relations existed between the stakeholders. For example, loyalty was ensured by family relationships, or incentives were provided to ensure a supply of shrimps between stakeholders. Shrimp handling practices during the steps prior to shrimp processing at the plants were not in agreement with the requirements of the European regulations. For example, shrimps were kept at ambient temperature (28 ± 1°C) by 94.1% of fishermen and 60.9% of intermediate traders. Shrimps were also stored in inappropriate holding containers and washed with nonpotable water. Fishermen, intermediate traders, and collectors considered shrimp size and texture their priority quality attributes, whereas plant managers considered shrimp appearance (freshness) and texture their priority quality attributes. This survey demonstrated that the steps prior to shrimp processing at the plants are the critical steps for shrimp quality and safety because of temperature abuse and inappropriate hygienic conditions. There is a need to communicate and provide incentives for the stakeholders in the first part of the chain to give priority to shrimp freshness. Moreover, training in Good Fishing Practices and safe food handling practices and evaluation of compliance with the practices through monitoring will contribute to better shrimp quality and safety management. PMID:25198861

Dabade, D Sylvain; den Besten, Heidy M W; Azokpota, Paulin; Nout, M J Rob; Hounhouigan, D Joseph; Zwietering, Marcel H

2014-09-01

264

Wickliffe & Jodice: Seabirds at shrimp trawlers near South Carolina 31 Marine Ornithology 38: 3139 (2010)  

E-print Network

Wickliffe & Jodice: Seabirds at shrimp trawlers near South Carolina 31 Marine Ornithology 38: 31 in such systems. South Carolina has a long history of shrimp trawling. Despite an economic decline in the shrimp and South Carolina Cooperative Fish and Wildlife Research Unit, G-27 Lehotsky Hall, Clemson University

Jodice, Patrick

265

Occurrence of Deferribacterales and Entomoplasmatales in the deep-sea Alvinocarid shrimp Rimicaris exoculata gut  

Microsoft Academic Search

The phylogenetic diversity of the gut microbial population of the hydrothermal shrimp Rimicaris exoculata was determined. The presence of micro-organisms in the hindgut of the shrimp was determined, and their morphology illustrated for the first time by transmission electron microscopy. DNA was extracted from the fore-, mid- and hindgut of shrimps collected at the Rainbow site, at the Mid-Atlantic Ridge,

Magali Zbinden; Marie-Anne Cambon-Bonavita

2003-01-01

266

Strong population genetic structure and larval dispersal capability of the burrowing ghost shrimp (Neotrypaea californiensis)  

EPA Science Inventory

The burrowing ghost shrimp, Neotrypaea californiensis, is a vital member of the estuarine benthic community. Dense populations of shrimp are found in the major estuaries of Washington and Oregon. Our study determines the genetic structure of shrimp populations in order to gain ...

267

Effects of the insecticide permethrin on three life stages of the grass shrimp, Palaemonetes pugio  

Microsoft Academic Search

Toxicity of the pyrethroid insecticide permethrin was assessed using three life stages of the estuarine grass shrimp, Palaemonetes pugio. Adult and larval shrimp were tested with and without sediment. An aqueous embryo test was also conducted. Cellular stress biomarkers, glutathione, and lipid peroxidation, were assessed. Larval shrimp were the most sensitive life stage with a 96-h lethal concentration (LC50) value

M. E. DeLorenzo; L. Serrano; K. W. Chung; J. Hoguet; P. B. Key

2006-01-01

268

Detection of new hosts for white spot syndrome virus of shrimp using nested polymerase chain reaction  

Microsoft Academic Search

The presence of white spot syndrome virus (WSSV) of shrimp in various marine crustaceans was studied by using polymerase chain reaction (PCR). The incidence of the virus in non-cultured crustaceans from shrimp farms was also studied. The results indicate that wild-caught asymptomatic marine shrimp such as Metapenaeus dobsoni, Parapenaeopsis stylifera, Solenocera indica and Squilla mantis carry WSSV. This virus could

Anirban Chakraborty; Biju Joseph; S. K. Otta; Indrani Karunasagar; Iddya Karunasagar

2001-01-01

269

50 CFR 622.208 - Minimum mesh size applicable to rock shrimp off Georgia and Florida.  

Code of Federal Regulations, 2013 CFR

...false Minimum mesh size applicable to rock shrimp off Georgia and Florida. 622...208 Minimum mesh size applicable to rock shrimp off Georgia and Florida. (a) The minimum mesh size for the cod end of a rock shrimp trawl net in the South...

2013-10-01

270

50 CFR 622.19 - South Atlantic rock shrimp limited access off Georgia and Florida.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 false South Atlantic rock shrimp limited access off Georgia and Florida...Limitations § 622.19 South Atlantic rock shrimp limited access off Georgia and Florida...For a person aboard a vessel to fish for rock shrimp in the South Atlantic EEZ off...

2012-10-01

271

50 CFR 622.208 - Minimum mesh size applicable to rock shrimp off Georgia and Florida.  

Code of Federal Regulations, 2014 CFR

...false Minimum mesh size applicable to rock shrimp off Georgia and Florida. 622...208 Minimum mesh size applicable to rock shrimp off Georgia and Florida. (a) The minimum mesh size for the cod end of a rock shrimp trawl net in the South...

2014-10-01

272

50 CFR 622.19 - South Atlantic rock shrimp limited access off Georgia and Florida.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 false South Atlantic rock shrimp limited access off Georgia and Florida...Limitations § 622.19 South Atlantic rock shrimp limited access off Georgia and Florida...For a person aboard a vessel to fish for rock shrimp in the South Atlantic EEZ off...

2011-10-01

273

50 CFR 622.19 - South Atlantic rock shrimp limited access off Georgia and Florida.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 false South Atlantic rock shrimp limited access off Georgia and Florida...Limitations § 622.19 South Atlantic rock shrimp limited access off Georgia and Florida...For a person aboard a vessel to fish for rock shrimp in the South Atlantic EEZ off...

2010-10-01

274

NOAA Technical Memorandum NMFS-SEFSC-639 Stock Assessment of Pink Shrimp  

E-print Network

NOAA Technical Memorandum NMFS-SEFSC-639 Stock Assessment of Pink Shrimp (Farfantepenaeus duorarum Stock Assessment of Pink Shrimp (Farfantepenaeus duorarum) in the U.S. Gulf of Mexico for 2011 By Rick A A. 2012. Stock Assessment of Pink Shrimp (Farfantepenaeus duorarum) in the U.S. Gulf of Mexico

275

NOAA Technical Memorandum NMFS-SEFSC-638 Stock Assessment of Brown Shrimp  

E-print Network

NOAA Technical Memorandum NMFS-SEFSC-638 Stock Assessment of Brown Shrimp (Farfantepenaeus aztecus Stock Assessment of Brown Shrimp (Farfantepenaeus aztecus) in the U.S. Gulf of Mexico for 2011 By Rick A A. 2012. Stock Assessment of Brown Shrimp (Farfantepenaeus aztecus) in the U.S. Gulf of Mexico

276

78 FR 13324 - Certain Frozen Warmwater Shrimp From the People's Republic of China: Notice of Preliminary...  

Federal Register 2010, 2011, 2012, 2013, 2014

...single entity. See Certain Frozen Warmwater Shrimp From...Rescission, Extension of Time Limits for the Final Results...Administrative Review of Certain Frozen Warmwater Shrimp From...to the order is certain frozen warmwater shrimp from...subject to the order at the time of this CCR was...

2013-02-27

277

76 FR 65178 - Certain Frozen Warmwater Shrimp From the Socialist Republic of Vietnam: Extension of Preliminary...  

Federal Register 2010, 2011, 2012, 2013, 2014

...A-552-802] Certain Frozen Warmwater Shrimp From...decided to extend the time limit for the preliminary...duty order on certain frozen warmwater shrimp...duty order on certain frozen warmwater shrimp from...31, 2011. Statutory Time Limits In...

2011-10-20

278

76 FR 36519 - Certain Frozen Warmwater Shrimp From the Socialist Republic of Vietnam: Extension of Final...  

Federal Register 2010, 2011, 2012, 2013, 2014

...A-552-802] Certain Frozen Warmwater Shrimp From...is extending the time limits for the final results...administrative review of certain frozen warmwater shrimp from...Vietnam. See Certain Frozen Warmwater Shrimp From...July 5, 2011. Statutory Time Limits In...

2011-06-22

279

75 FR 55740 - Certain Frozen Warmwater Shrimp From the Socialist Republic of Vietnam: Extension of Preliminary...  

Federal Register 2010, 2011, 2012, 2013, 2014

...A-552-802] Certain Frozen Warmwater Shrimp From...is extending the time limit for the preliminary...administrative review of certain frozen warmwater shrimp from...the review for certain frozen warmwater shrimp from...31, 2010. Statutory Time Limits In...

2010-09-14

280

75 FR 27705 - Certain Frozen Warmwater Shrimp from the Socialist Republic of Vietnam: Extension of Final...  

Federal Register 2010, 2011, 2012, 2013, 2014

...is extending the time limit for the final results...shipper review of certain frozen warmwater shrimp...Ltd. See Certain Frozen Warmwater Shrimp From...Department extended the time limit to complete its...30 days. See Certain Frozen Warmwater Shrimp...

2010-05-18

281

Mangroves as filters of shrimp pond effluent: predictions and biogeochemical research needs  

Microsoft Academic Search

Preliminary estimates of the ratio of mangrove forest: shrimp pond area necessary to remove nutrients from shrimp pond effluent are made using budgets of nitrogen and phosphorus output for semi-intensive and intensive shrimp ponds combined with estimates of total net primary production in Rhizophora-dominated mangrove forests in tropical coastal areas. If effluent is delivered directly to mangrove forest plots, it

A. I. Robertson; M. J. Phillips

1995-01-01

282

State of the art of immunological tools and health control of penaeid shrimp  

Microsoft Academic Search

Shrimp farming constitutes an important source of revenue and employment in many develop- ing countries. However, infectious diseases have affected the profitability of the shrimp industry. For this reason, disease prevention is a priority and shrimp immunology has become a prime area of research. In such a perspective, studies into the value of cellular and humoral parameters as indicators of

Jenny Rodriguez; Gilles Le Moulla

283

The effects of boiling on the allergenic properties of tropomyosin of shrimp (litopenaeus vannamei).  

Technology Transfer Automated Retrieval System (TEKTRAN)

Shrimp play an important role in human nutrition, and is responsible for severe hypersensitivity reactions. The thermal stability of raw and boiled shrimp tropomyosins (TM) has never been reported. The aims of the study were to compare the stability of raw and boiled shrimp TM of Litopenaeus vanname...

284

The atyid shrimp (Crustacea: Decapoda: Atyidae) rostrum: phylogeny versus adaptation, taxonomy versus trophic ecology  

Microsoft Academic Search

Cave shrimps of the subgenus Troglocaris (Atyidae), exhibit high variability in rostral length and dentition. In shrimp populations that co-occur with the amphibian predator Proteus anguinus, longer rostra armed with more numerous teeth are recorded. These shrimps are also larger than those living in a presumably Proteus-free environment. Discrepancies between molecularly established phylogenetic relationships and distributions of rostral length, as

Jure Jugovic; Simona Prevorcnik; Gregor Aljancic; Boris Sket

2010-01-01

285

Evaluating the impact of seismic prospecting on artisanal shrimp fisheries  

NASA Astrophysics Data System (ADS)

The constant need to discover new hydrocarbon deposits is causing the use of air-guns to become a very widespread method of seismic prospecting. However, there is still disagreement regarding their impact on the marine environment. This uncertainty is particularly severe in the case of shellfish, which account for a substantial share of commercial fisheries and seafood trade in many parts of the world. In this paper we report on the first study to explicitly assess the impact of seismic prospecting on shrimp resources. We measured bottom trawl yields of a nonselective commercial shrimp fishery comprising the Southern white shrimp, Litopenaeus schmitti, the Southern brown shrimp, Farfantepenaeus subtilis, and the Atlantic Seabob, Xyphopenaeus kroyeri (Decapoda: Penaeidae), before and after the use of an array of four synchronized air-guns, each with 635 in 3 of total capacity, 2.000 psi, and peak pressure of 196 dB (re 1 ?Pa at 1 m). Our results did not detect significant deleterious impact of seismic prospecting on the studied species, suggesting that shrimp stocks are resilient to the disturbance by air-guns under our experimental conditions.

Andriguetto-Filho, José M.; Ostrensky, Antonio; Pie, Marcio R.; Silva, Ubiratã A.; Boeger, Walter A.

2005-09-01

286

Immunological-based assays for specific detection of shrimp viruses  

PubMed Central

Among shrimp viral pathogens, white spot syndrome virus (WSSV) and yellow head virus (YHV) are the most lethal agents, causing serious problems for both the whiteleg shrimp, Penaeus (Litopenaeus) vannamei, and the black tiger shrimp, Penaeus (Penaeus) monodon. Another important virus that infects P. vannamei is infectious myonecrosis virus (IMNV), which induces the white discoloration of affected muscle. In the cases of taura syndrome virus and Penaeus stylirostris densovirus (PstDNV; formerly known as infectious hypodermal and hematopoietic necrosis virus), their impacts were greatly diminished after the introduction of tolerant stocks of P. vannamei. Less important viruses are Penaeus monodon densovirus (PmDNV; formerly called hepatopancreatic parvovirus), and Penaeus monodon nucleopolyhedrovirus (PemoNPV; previously called monodon baculovirus). For freshwater prawn, Macrobrachium rosenbergii nodavirus and extra small virus are considered important viral pathogens. Monoclonal antibodies (MAbs) specific to the shrimp viruses described above have been generated and used as an alternative tool in various immunoassays such as enzyme-linked immunosorbent assay, dot blotting, Western blotting and immunohistochemistry. Some of these MAbs were further developed into immunochromatographic strip tests for the detection of WSSV, YHV, IMNV and PemoNPV and into a dual strip test for the simultaneous detection of WSSV/YHV. The strip test has the advantages of speed, as the result can be obtained within 15 min, and simplicity, as laboratory equipment and specialized skills are not required. Therefore, strip tests can be used by shrimp farmers for the pond-side monitoring of viral infection. PMID:24567913

Chaivisuthangkura, Parin; Longyant, Siwaporn; Sithigorngul, Paisarn

2014-01-01

287

Combining Bottom-Up and Top-Down Mass Spectrometric Strategies for De Novo Sequencing of the Crustacean Hyperglycemic Hormone (CHH) from Cancer borealis  

PubMed Central

The crustacean hyperglycemic hormone (CHH) is a 72-amino acid residue polypeptide with multiple physiological effects. The X-organ/sinus gland is the primary source for CHH and its family members. However, the amino acid sequence of CHH in Cancer borealis, a premier model system for neuromodulation, has not been characterized. In this study, a novel hybrid strategy combining “bottom-up” and “top-down” methodologies enabled direct sequencing of CHH peptide in the sinus gland of C. borealis. Multiple mass spectrometry (MS)-based techniques were employed to characterize the CHH peptide, including direct tissue analysis by MALDI FT-ICR MS, de novo sequencing of tryptic digested CHH by nano-LC-ESI Q-TOF MS and intact CHH analysis by LC FT-ICR MS. In-trap cleaning removed the extensive matrix adducts of CHH in the direct tissue analysis by MALDI FT-ICR MS. Fragmentation efficiency of the intact CHH was drastically improved after the reduction-alkylation of the disulfide bonds. The sequence coverage was further enhanced by employing multiple complementary fragmentation techniques. Overall, this example is the largest neuropeptide de novo sequenced in C. borealis by mass spectrometric methods. PMID:19046072

Ma, Mingming; Chen, Ruibing; Ge, Ying; He, Huan; Marshall, Alan G.; Li, Lingjun

2009-01-01

288

Caerulein-and xenopsin-related peptides with insulin-releasing activities from skin secretions of the clawed frogs, Xenopus borealis and Xenopus amieti (Pipidae).  

PubMed

Caerulein-related peptides were identified in norepinephrine-stimulated skin secretions of the tetraploid frog Xenopus borealis and the octoploid frog Xenopus amieti using negative ion electrospray mass spectrometry and their primary structures determined by positive ion tandem (MS/MS) mass spectrometry. X. borealis caerulein-B1 (pGlu-Gln-Asp-Tyr(SO(3))-Gly-Thr-Gly-Trp-Met-Asp-Phe.NH2) contains an additional Gly(5) residue compared with X. laevis caerulein and caerulein-B2 (pGlu-Asp-Tyr(SO(3))-Thr-Gly-Trp-Met-Asp-Phe.NH2) contains a Gln(2) deletion. X. amieti caerulein was identical to the X. laevis peptide. In addition, xenopsin, identical to the peptide from X. laevis, together with xenopsin-AM2 (pGlu-Gly-Arg-Arg-Pro-Trp-Ile- Leu) that contains the substitution Lys(3)?Arg were isolated from X. amieti secretions. X. borealis caerulein-B1, and X. amieti xenopsin and xenopsin-AM2 produced significant (P<0.05) and concentration-dependent stimulations of insulin release from the rat BRIN-BD11 clonal ? cell line at concentrations ?30nM. The peptides did not stimulate the release of lactate dehydrogenase at concentrations up to 3?M demonstrating that the integrity of the plasma membrane had been preserved. While their precise biological role is unclear, the caerulein- and xenopsin-related peptides may constitute a component of the animal's chemical defenses against predators. PMID:21458457

Zahid, Osama K; Mechkarska, Milena; Ojo, Opeolu O; Abdel-Wahab, Yasser H A; Flatt, Peter R; Meetani, Mohammed A; Conlon, J Michael

2011-06-01

289

Growth and reproductive performance of broodstock shrimp reared in a biosecure recirculating aquaculture system versus a flow-through pond  

Microsoft Academic Search

Over the past decade, viral pathogens have caused mass mortalities of farmed shrimp throughout the major shrimp farming regions of the world. In addition, the global shrimp farming industry has been criticized for negatively impacting coastal environments. These issues have raised concerns about the sustainability of traditional shrimp farming practices, and have prompted farmers and researchers to develop biosecure technologies

Clete A. Otoshi; Steve M. Arce; Shaun M. Moss

2003-01-01

290

Description and analysis of the shrimp raceway run for the summer 1990, Shrimp Mariculture Project, Texas A&M University System  

E-print Network

water visibility and productivity, but with low chemical and organic pollutants. C. TYPES OP GROWOUT OPERATIONS In general, shrimp growout culture is classified into extensive, semi-intensive, and intensive techniques (Lawrence et al. 1985... ABSTRACT DESCRIPTION AND ANALYSIS OF THE SHRIMP RACEWAY RUN FOR THE SUMMER 1990, SHRIMP MARICULTURE PROSPECT, TEXAS A&M UNIVERSITY SYSTEM. Luis Mena Licenciature in Biology, Universidad de Costa Rica The objectives of this work are to present general...

Mena, Luis

1991-01-01

291

Emerging viral diseases of fish and shrimp.  

PubMed

The rise of aquaculture has been one of the most profound changes in global food production of the past 100 years. Driven by population growth, rising demand for seafood and a levelling of production from capture fisheries, the practice of farming aquatic animals has expanded rapidly to become a major global industry. Aquaculture is now integral to the economies of many countries. It has provided employment and been a major driver of socio-economic development in poor rural and coastal communities, particularly in Asia, and has relieved pressure on the sustainability of the natural harvest from our rivers, lakes and oceans. However, the rapid growth of aquaculture has also been the source of anthropogenic change on a massive scale. Aquatic animals have been displaced from their natural environment, cultured in high density, exposed to environmental stress, provided artificial or unnatural feeds, and a prolific global trade has developed in both live aquatic animals and their products. At the same time, over-exploitation of fisheries and anthropogenic stress on aquatic ecosystems has placed pressure on wild fish populations. Not surprisingly, the consequence has been the emergence and spread of an increasing array of new diseases. This review examines the rise and characteristics of aquaculture, the major viral pathogens of fish and shrimp and their impacts, and the particular characteristics of disease emergence in an aquatic, rather than terrestrial, context. It also considers the potential for future disease emergence in aquatic animals as aquaculture continues to expand and faces the challenges presented by climate change. PMID:20409453

Walker, Peter J; Winton, James R

2010-01-01

292

Emerging viral diseases of fish and shrimp  

PubMed Central

The rise of aquaculture has been one of the most profound changes in global food production of the past 100 years. Driven by population growth, rising demand for seafood and a levelling of production from capture fisheries, the practice of farming aquatic animals has expanded rapidly to become a major global industry. Aquaculture is now integral to the economies of many countries. It has provided employment and been a major driver of socio-economic development in poor rural and coastal communities, particularly in Asia, and has relieved pressure on the sustainability of the natural harvest from our rivers, lakes and oceans. However, the rapid growth of aquaculture has also been the source of anthropogenic change on a massive scale. Aquatic animals have been displaced from their natural environment, cultured in high density, exposed to environmental stress, provided artificial or unnatural feeds, and a prolific global trade has developed in both live aquatic animals and their products. At the same time, over-exploitation of fisheries and anthropogenic stress on aquatic ecosystems has placed pressure on wild fish populations. Not surprisingly, the consequence has been the emergence and spread of an increasing array of new diseases. This review examines the rise and characteristics of aquaculture, the major viral pathogens of fish and shrimp and their impacts, and the particular characteristics of disease emergence in an aquatic, rather than terrestrial, context. It also considers the potential for future disease emergence in aquatic animals as aquaculture continues to expand and faces the challenges presented by climate change. PMID:20409453

Walker, Peter J.; Winton, James R.

2010-01-01

293

Neuropilar Projections of the Anterior Gastric Receptor Neuron in the Stomatogastric Ganglion of the Jonah Crab, Cancer Borealis  

PubMed Central

Sensory neurons provide important feedback to pattern-generating motor systems. In the crustacean stomatogastric nervous system (STNS), feedback from the anterior gastric receptor (AGR), a muscle receptor neuron, shapes the activity of motor circuits in the stomatogastric ganglion (STG) via polysynaptic pathways involving anterior ganglia. The AGR soma is located in the dorsal ventricular nerve posterior to the STG and it has been thought that its axon passes through the STG without making contacts. Using high-resolution confocal microscopy with dye-filled neurons, we show here that AGR from the crab Cancer borealis also has local projections within the STG and that these projections form candidate contact sites with STG motor neurons or with descending input fibers from other ganglia. We develop and exploit a new masking method that allows us to potentially separate presynaptic and postsynaptic staining of synaptic markers. The AGR processes in the STG show diversity in shape, number of branches and branching structure. The number of AGR projections in the STG ranges from one to three simple to multiply branched processes. The projections come in close contact with gastric motor neurons and descending neurons and may also be electrically coupled to other neurons of the STNS. Thus, in addition to well described long-loop pathways, it is possible that AGR is involved in integration and pattern regulation directly in the STG. PMID:24312448

Goeritz, Marie L.; Bowers, Matthew R.; Slepian, Brian; Marder, Eve

2013-01-01

294

Offshore Observations of Eastern Red Bats (Lasiurus borealis) in the Mid-Atlantic United States Using Multiple Survey Methods  

PubMed Central

Little is known about the migration and movements of migratory tree-roosting bat species in North America, though anecdotal observations of migrating bats over the Atlantic Ocean have been reported since at least the 1890s. Aerial surveys and boat-based surveys of wildlife off the Atlantic Seaboard detected a possible diurnal migration event of eastern red bats (Lasiurus borealis) in September 2012. One bat was sighted approximately 44 km east of Rehoboth Beach, Delaware during a boat-based survey. Eleven additional bats were observed between 16.9 and 41.8 km east of New Jersey, Delaware, and Virginia in high definition video footage collected during digital aerial surveys. Observations were collected incidentally as part of a large baseline study of seabird, marine mammal, and sea turtle distributions and movements in the offshore environment. Digital survey methods also allowed for altitude estimation for several of these bats at >100 m above sea level. These observations provide new evidence of bat movements offshore, and offer insight into their flight heights above sea level and the times of day at which such migrations may occur. PMID:24367614

Hatch, Shaylyn K.; Connelly, Emily E.; Divoll, Timothy J.; Stenhouse, Iain J.; Williams, Kathryn A.

2013-01-01

295

Apron heights around stepped massifs in the Cydonia Mensae region: Do they record the local paleobathymetry of Oceanus Borealis?  

NASA Technical Reports Server (NTRS)

The use of photoclinometry and shadow measurements to determine the basin volume without linking the measurements to a global datum is described. Since the boundary, or shoreline, of the basin cannot be tied to the datum and typically has no useful local relative height to measure, what is needed is a number of measurements of the height of the paleoshorelines distributed across the basin. Photoclinometric profiles are being compiled from Viking Orbiter images of the Cydonia Mensae region, which includes images with high sun elevations, necessary to avoid shadows, and images with low sun elevations, to enable the use of shadow measurements as an independent check, at high resolution (40 to 100 m/pixel). Both asymmetric and symmetric photoclinometric profile models are being used, and the results cross checked with one another to minimize errors. An apron-height map, potentially a paleobathymetric map of part of the margin of Oceanus Borealis, can be compiled from this data to determine whether variations in apron height are consistent with a lacustrine interpretation.

Parker, T. J.; Gorsline, D. S.

1993-01-01

296

COMBINING MICRODIALYSIS, NANOLC-MS, AND MALDI-TOF/TOF TO DETECT NEUROPEPTIDES SECRETED IN THE CRAB, CANCER BOREALIS  

PubMed Central

Microdialysis is a useful technique for sampling neuropeptides in vivo and decapod crustaceans are important model organisms for studying how these peptides regulate physiological processes. However, to date no microdialysis procedure has been reported for sampling neuropeptides from crustaceans. Here we report the first application of microdialysis to sample neuropeptides from the hemolymph of the crab, Cancer borealis. Microdialysis probes were implanted into the pericardial region of live crabs and the resulting dialysates were desalted, concentrated, and analyzed by LC-ESI-QTOF and MALDI-TOF/TOF mass spectrometry. Analysis of in vitro microdialysates of hemolymph revealed more neuropeptides and fewer protein fragments than hemolymph prepared by typical analysis methods. Mass spectra of in vivo dialysates displayed neuropeptides from ten peptide families, including the RFamide, allatostatin, and orcokinin families. In addition, GAHKNYLRFa, SDRNFLRFa, and TNRNFLRFa were sequenced from hemolymph dialysates. The detection of these neuropeptides in the hemolymph suggests that they are functioning as hormones as well as neuromodulators. In vivo microdialysis offers the capability to further study these and other neuropeptides in crustacean hemolymph, complementing current tissue-based studies and extending our knowledge of hormonal regulation of physiological states. PMID:18700782

Behrens, Heidi L.; Chen, Ruibing; Li, Lingjun

2008-01-01

297

Apron heights around stepped massifs in the Cydonia Mensae region: Do they record the local paleobathymetry of Oceanus Borealis?  

NASA Astrophysics Data System (ADS)

The use of photoclinometry and shadow measurements to determine the basin volume without linking the measurements to a global datum is described. Since the boundary, or shoreline, of the basin cannot be tied to the datum and typically has no useful local relative height to measure, what is needed is a number of measurements of the height of the paleoshorelines distributed across the basin. Photoclinometric profiles are being compiled from Viking Orbiter images of the Cydonia Mensae region, which includes images with high sun elevations, necessary to avoid shadows, and images with low sun elevations, to enable the use of shadow measurements as an independent check, at high resolution (40 to 100 m/pixel). Both asymmetric and symmetric photoclinometric profile models are being used, and the results cross checked with one another to minimize errors. An apron-height map, potentially a paleobathymetric map of part of the margin of Oceanus Borealis, can be compiled from this data to determine whether variations in apron height are consistent with a lacustrine interpretation.

Parker, T. J.; Gorsline, D. S.

298

JOUSEHOLD CONSUMER PREFERENCE ~EADED SHRIMP& BREADED FISH STICKS  

E-print Network

. D. C. September 1955 HOUSEHOLD CONSUMER PREFERENCES FOR BREADED SERIMP AND BREADm FISH STICKS Part 2 survey of household consumer preferences for breaded shrimp and breaded f ish sticks . The survey and shellfish was obtained also. Important developments in the marketing of fishery products have occurred i n

299

The Lobster and Shrimp Fisheries in Hawaii The Lobster Fishery  

E-print Network

The Lobster and Shrimp Fisheries in Hawaii The Lobster Fishery Introduction The commercial lobster fishery in Hawaii is a trap fishery which harvests several lobster species in the North western Hawaiian, from Nihoa Island to Kure Atoll (Fig. 1). The fishery targets two species: the endemic spiny lobster

300

FURTHER STUDIES ON THE FAIRY SHRIMP POPULATIONS OF NORTHEASTERN OHIO  

Microsoft Academic Search

Over a period of ten years, 1941-1950 inclusive, fairy shrimps have been collected from certain temporary pools and ponds in Portage, Summit, Stark, and Crawford Counties of Northeastern Ohio. Reports on the annual survey for the first six years have already been published (Dexter and Sheary, 1943; Dexter, 1943, 1946; Dexter and Kuehnle, 1948). The present paper summarizes studies of

RALPH W. DEXTER; CHARLES H. KUEHNLE

1951-01-01

301

Morphometric differentiation in small juveniles of the pink spotted shrimp  

E-print Network

306 Morphometric differentiation in small juveniles of the pink spotted shrimp (Farfantepenaeus-Farfante (1969, 1970, 1971a) described diagnostic charac- ters of the genus Farfantepenaeus that allowed (RL/CL). In addition, she classified Farfantepenaeus into two groups according to the shape

302

78 FR 9024 - Sea Turtle Conservation; Shrimp Trawling Requirements  

Federal Register 2010, 2011, 2012, 2013, 2014

...Incidental Bycatch and Mortality of Sea Turtles in the Southeastern U.S. Shrimp Fisheries...which could result in mortality of sea turtles. Based on new information discussed...not reflect actual fishery impacts on sea turtles. At the time the DEIS was...

2013-02-07

303

Bringing Scientific Inquiry Alive Using Real Grass Shrimp Research  

ERIC Educational Resources Information Center

This lesson was developed for middle school students using actual research on grass shrimp ("Palaemonetes pugio") to illustrate the process of a scientific investigation. The research was conducted at Savannah State University and funded by the National Oceanic and Atmospheric Administration (NOAA) Office of Education through the Living Marine…

Aultman, Terry; Curran, Mary Carla; Partridge, Michael

2010-01-01

304

21 CFR 161.175 - Frozen raw breaded shrimp.  

Code of Federal Regulations, 2013 CFR

...removed from the still frozen shrimp material (between...determine the exact dip time required for “debreading...necessary. The correct dip time is the minimum time of immersion in the copper...units are still solidly frozen and only a slight trace...

2013-04-01

305

CO2 Efflux from Shrimp Ponds in Indonesia  

PubMed Central

The conversion of mangrove forest to aquaculture ponds has been increasing in recent decades. One of major concerns of this habitat loss is the release of stored ‘blue’ carbon from mangrove soils to the atmosphere. In this study, we assessed carbon dioxide (CO2) efflux from soil in intensive shrimp ponds in Bali, Indonesia. We measured CO2 efflux from the floors and walls of shrimp ponds. Rates of CO2 efflux within shrimp ponds were 4.37 kg CO2 m?2 y?1 from the walls and 1.60 kg CO2 m?2 y?1 from the floors. Combining our findings with published data of aquaculture land use in Indonesia, we estimated that shrimp ponds in this region result in CO2 emissions to the atmosphere between 5.76 and 13.95 Tg y?1. The results indicate that conversion of mangrove forests to aquaculture ponds contributes to greenhouse gas emissions that are comparable to peat forest conversion to other land uses in Indonesia. Higher magnitudes of CO2 emission may be released to atmosphere where ponds are constructed in newly cleared mangrove forests. This study indicates the need for incentives that can meet the target of aquaculture industry without expanding the converted mangrove areas, which will lead to increased CO2 released to atmosphere. PMID:23755306

Sidik, Frida; Lovelock, Catherine E.

2013-01-01

306

A Filamentous Bacterium on the Brine Shrimp and Its Control  

Microsoft Academic Search

A strain of a colorless, filamentous bacterium (tentatively identified as Leucothrix mucor) heavily infests the brine shrimp, Artemia salina. Its ultrastructure, unlike that of some other strains, does not reveal a distinct middle layer between its outer cell wall layer and cytoplasmic membrane, irregular blebs extending from the cell layers, or an external sheath. An entire infestation, represented as a

Mobashir A. Solangi; Robin M. Overstreet; Ann L. Gannam

1979-01-01

307

Cyanobacterial cytotoxicity versus toxicity to brine shrimp Artemia salina  

Microsoft Academic Search

Heterocytous cyanobacteria from various habitats were screened for toxicity to brine shrimp Artemia salina and the murine lymphoblastic cell line Sp\\/2 in order to compare these two testing models for evaluation of risk posed by cyanobacteria to human health. Methanol extracts of biomass and cultivation media were tested for toxicity and selected extracts were fractionated to determine the active fraction.

Daniel Hisem; Pavel Hrouzek; Petr Tomek; Jana Tomší?ková; Eliška Zapom?lová; Kate?ina Skácelová; Alena Lukešová; Ji?í Kopecký

2011-01-01

308

Recent population expansion and connectivity in the hydrothermal shrimp  

E-print Network

-sea hydrothermal vents are unstable habitats that are both spatially and temporally fragmented. In vent species of the shrimp Rimicaris exoculata, which forms high-density local populations on hydrothermal vents along the Mid-Atlantic ridge. Location Deep-sea hydrothermal vents along the Mid-Atlantic Ridge. Methods We used

Teixeira, Sara

309

Economic and financial implications of shrimp farming in West Texas  

E-print Network

that shrimp farming at this time is relatively risky with a limited return on investment in West Texas. Risk was included for survival, growth rate, and price. A final risk analysis incorporated catastrophic events whereby there was a 5% percent probability...

Britt, David Westbrook

1995-01-01

310

Halogenated contaminants in farmed salmon, trout, tilapia, pangasius, and shrimp.  

PubMed

Polychlorinated biphenyls (PCBs), polychlorinated dibenzo-p-dioxins and dibenzo-p-furans (PCDD/Fs), organochlorine pesticides (OCPs), polybrominated diphenyl ethers (PBDEs), hexabromocyclododecane diastereomers (HBCDs), and perfluorinated compounds (PFCs) were analyzed in popular farmed fish such as salmon, trout, tilapia, and pangasius and in farmed shrimp. The samples originated from southeast Asia, Europe, and South America. Results show the following: (i) Carnivorous species contained higher contaminant concentrations than omnivorous species. (ii) Contaminant concentrations generally decreased per species in the following order of salmon > trout > tilapia approximately equal to pangasius approximately equal to shrimp. (iii) Most contaminant concentrations decreased in the following order of PCBs approximately equal to dichloro-diphenyl-trichloroethanes (DDTs) > hexachlorobenzene approximately equal to pentachlorobenzene approximately equal to dieldrin approximately equal to PBDEs approximately equal to alpha-HBCD approximately equal to perfluorooctane sulfonate (PFOS) > World Health Organization toxic equivalents (WHO-TEQ) [PCDD/Fs and dioxin-like (dl)-PCBs]. (iv) Contaminant concentrations were very low (mostly <1 ng/g wet weight) and far below the European and Dutch legislative limits. (v) Contaminant concentrations in farmed shrimp, pangasius, and tilapia were lower than those in wild fish, whereas contaminant concentrations in farmed salmon and trout were higher than those in lean wild marine fish. From the five species investigated, salmon is predominantly responsible (97%) for human exposure to the sum of the investigated contaminants. The contribution of trout, tilapia, pangasius, and shrimp is small (3%) because contaminant concentrations and consumption volumes were much lower. PMID:19569323

van Leeuwen, S P J; van Velzen, M J M; Swart, C P; van der Veen, I; Traag, W A; de Boer, J

2009-06-01

311

Design and Test of a Topless Shrimp Trawl to Reduce Pelagic Fish Bycatch in the Gulf of Maine Pink Shrimp Fishery  

Microsoft Academic Search

A new innovative topless shrimp trawl was designed and tested in the flume tank, and at sea to evaluate its potential of reducing finfish bycatch in the pink shrimp fishery in the Gulf of Maine. The trawl design removed the square and the top part of the section after the square (first belly section), to become \\

Pingguo He; David Goethel; Tracey Smith

2007-01-01

312

Vaccination Enhances Early Immune Responses in White Shrimp Litopenaeus vannamei after Secondary Exposure to Vibrio alginolyticus  

PubMed Central

Background Recent work suggested that the presence of specific memory or some form of adaptive immunity occurs in insects and shrimp. Hypervariable pattern recognition molecules, known as Down syndrome cell adhesion molecules, are able to mount specific recognition, and immune priming in invertebrates. In the present study, we attempted to understand the immune response pattern of white shrimp Litopenaeus vannamei which received primary (PE) and secondary exposure (SE) to Vibrio alginolyticus. Methodology Immune parameters and proliferation of haematopoietic tissues (HPTs) of shrimp which had received PE and SE to V. alginolyticus were measured. In the PE trial, the immune parameters and proliferation of HPTs of shrimp that received heat-killed V. alginolyticus (HVa) and formalin-inactivated V. alginolyticus (FVa) were measured. Mortality, immune parameters and proliferation of HPTs of 7-day-HVa-PE shrimp (shrimp that received primary exposure to HVa after 7 days) and 7-day-FVa-PE shrimp (shrimp that received primary exposure to FVa after 7 days) following SE to live V. alginolyticus (LVa) were measured. Phagocytic activity and clearance efficiency were examined for the 7?35-day-HVa-PE and FVa-PE shrimp. Results HVa-receiving shrimp showed an earlier increase in the immune response on day 1, whereas FVa-receiving shrimp showed a late increase in the immune response on day 5. The 7-day-FVa-PE shrimp showed enhancement of immunity when encountering SE to LVa, whereas 7-day-HVa-PE shrimp showed a minor enhancement in immunity. 7-day-FVa-PE shrimp showed higher proliferation and an HPT mitotic index. Both phagocytic activity and clearance maintained higher for both HVa-PE and FVa-PE shrimp after 28 days. Conclusions HVa- and FVa-receiving shrimp showed the bacteria agglutinated prior to being phagocytised. FVa functions as a vaccine, whereas HVa functions as an inducer and can be used as an immune adjuvant. A combined mixture of FVa and HVa can serve as a “vaccine component” to modulate the immunity of shrimp. PMID:23894531

Lin, Yong-Chin; Chen, Jiann-Chu; Morni, Wan Zabidii W.; Putra, Dedi Fazriansyah; Huang, Chien-Lun; Li, Chang-Che; Hsieh, Jen-Fang

2013-01-01

313

The effect of copper on the color of shrimps: redder is not always healthier.  

PubMed

The objective of this research is to test the effects of copper on the color of pacific white shrimp (Litopenaeus vannamei) in vivo. Forty-eight shrimps (L. vannamei) were exposed to a low concentration of copper (1 mg/L; experimental treatment) and forty-eight shrimps were used as controls (no copper added to the water). As a result of this experiment, it was found that shrimps with more copper are significantly redder than those designated as controls (hue (500-700 nm): P=0.0015; red chroma (625-700 nm): P<0.0001). These results indicate that redder color may result from exposure to copper and challenge the commonly held view that highly pigmented shrimps are healthier than pale shrimps. PMID:25229639

Martínez, Ana; Romero, Yanet; Castillo, Tania; Mascaró, Maite; López-Rull, Isabel; Simões, Nuno; Arcega-Cabrera, Flor; Gaxiola, Gabriela; Barbosa, Andrés

2014-01-01

314

The Effect of Copper on the Color of Shrimps: Redder Is Not Always Healthier  

PubMed Central

The objective of this research is to test the effects of copper on the color of pacific white shrimp (Litopenaeus vannamei) in vivo. Forty-eight shrimps (L. vannamei) were exposed to a low concentration of copper (1 mg/L; experimental treatment) and forty-eight shrimps were used as controls (no copper added to the water). As a result of this experiment, it was found that shrimps with more copper are significantly redder than those designated as controls (hue (500–700 nm): P?=?0.0015; red chroma (625–700 nm): P<0.0001). These results indicate that redder color may result from exposure to copper and challenge the commonly held view that highly pigmented shrimps are healthier than pale shrimps. PMID:25229639

Martínez, Ana; Romero, Yanet; Castillo, Tania; Mascaró, Maite; López-Rull, Isabel; Simões, Nuno; Arcega-Cabrera, Flor; Gaxiola, Gabriela; Barbosa, Andrés

2014-01-01

315

Snapping shrimp prefer natural as opposed to artificial materials as their habitat in laboratory conditions  

NASA Astrophysics Data System (ADS)

This study analyzed the habitat selection behavior of the snapping shrimp, Alpheus spp., comparing natural shelters (Rocks with oysters attached on the surface Sh; rocks with smooth surface, Ro and coral rubble, Co with plastic bottle. Controlled laboratory experiments were conducted to assess the habitat preference, effect of photoperiod and shrimp orientation at shelter. The current study indicated that snapping shrimp preferred natural materials but rejected plastic bottle as their shelter. Among the natural shelters, coral rubble was the most preferred habitat followed by shell and rock. Photoperiod showed minimum effect on the shrimp where they spend most of the time inside and underneath the shelters. In conclusion the current study showed that snapping shrimp preferred coral rubble as opposed to other natural material and plastic bottle. The result also suggested that plastic debris in the marine environment is not an alternative habitat for snapping shrimp.

Sim, Lai Kean; Ghazali, Shahriman M.

2014-09-01

316

Elemental abundance analyses with coadded DAO spectrograms. VI - The mercury-manganese stars Nu Cancri, Iota Coronae Borealis and HR 8349  

NASA Technical Reports Server (NTRS)

The elemental abundances of three mercury-manganese stars, Nu Cancri, Iota Coronae Borealis, and HR 8349, were found to be consistent with previous analyses of this series. As Iota CrB is a double-lined spectroscopic binary with a small velocity amplitude for most of its period, its study required determining whether the observed lines were produced in the primary or secondary or both. The derived abundances and effective termperatures were used along with those of mercury-manganese stars previously analyzed in order to extend the study of probable correlations between abundances, with the effective temperature and surface gravity in accordance with radiative diffusion explanations.

Adelman, Saul J.

1989-01-01

317

Herstellung von Chitosan und einige Anwendungen  

Microsoft Academic Search

1. Die Deacetylierung von crabshell - Chitosan führte gleichzeitig zu einem drastischen Abfall der mittleren viscosimetrischen Molmasse ( Mv), insbesondere wenn die Temperatur und die Konzentration an NaOH erhöht werden. Diese Parameter beeinflussten jedoch nicht den Grad der Deacetylierung (DD). Wichtig ist jedoch die Quelle des Ausgangsmaterials: Chitin aus Pandalus borealis ist ein guter Rohstoff für die Herstellung von Chitosan

Marcin Henryk Struszczyk

2001-01-01

318

Construction and Characterization of a Bacterial Artificial Chromosome (BAC) Library of Pacific White Shrimp, Litopenaeus vannamei  

Microsoft Academic Search

The pacific white shrimp (Litopenaeus vannamei) is one of the most economically important marine aquaculture species in the world. To facilitate gene cloning and characterization,\\u000a genome analysis, physical mapping, and molecular selection breeding of marine shrimp, we have developed the techniques to\\u000a isolate high-quality megabase-sized DNA from hemocyte nuclear DNA of female shrimp and constructed a bacterial artificial\\u000a chromosome (BAC)

Xiaojun Zhang; Yang Zhang; Chantel Scheuring; Hong-Bin Zhang; Pin Huan; Bing Wang; Chengzhang Liu; Fuhua Li; Bin Liu; Jianhai Xiang

2010-01-01

319

Assessing the Shelf Life of Retail Shrimp Using Real-time Microrespirometer  

Microsoft Academic Search

Shrimp is the most consumed seafood item in the United States (U.S.). Currently 90% of the shrimp consumed in the U.S. is imported from a few Asian countries. When imported shrimp arrives to its destination, it probably contains a load of microbial contamination due to the post-harvest processing steps such as transportation, handling, preparation, beheading, peeling, deveining, packaging and storage

Fahad Alderees

2010-01-01

320

The Shrimp Caridina nilotica in Lake Victoria (East Africa), Before and After the Nile Perch Increase  

Microsoft Academic Search

The shrimp Caridina nilotica is a major prey of the introduced Nile perch in Lake Victoria. In spite of heavy predation, the density of shrimps increased\\u000a after the Nile perch boom and the concomitant disappearance of the haplochromine cichlids. In the same period, the mean size\\u000a of gravid shrimps and the size at first maturity declined. This seems to indicate

Frans Witte; Jan H. Wanink

2006-01-01

321

Visualizing Flow Diagrams in WebSphere Studio Using SHriMP Views  

Microsoft Academic Search

This paper describes the integration of an information visualization tool, called SHriMP Views, with IBM WebSphere Studio Application Developer Integration Edition, which was developed with Eclipse technology. Although SHriMP was originally developed for visualizing programs, it is content-independent. We have re-targeted SHriMP for visualizing flow diagrams. Flow diagrams, as supported by WebSphere Studio Appli- cation Developer Integration Edition, can be

Derek Rayside; Marin Litoiu; Margaret-anne D. Storey; Casey Best; Robert Lintern

2003-01-01

322

SUBARU/HDS STUDY OF HE 1015-2050: SPECTRAL EVIDENCE OF R CORONAE BOREALIS LIGHT DECLINE  

SciTech Connect

Hydrogen deficiency and a sudden optical light decline of about 6-8 mag are two principal characteristics of R Coronae Borealis (RCB) stars. The high latitude carbon star HE 1015-2050 was identified as a hydrogen-deficient carbon star from low-resolution spectroscopy. Photometric data of the Catalina Real-Time Transient Survey gathered between 2006 February and 2012 May indicate that the object exhibits no variability. However, a high-resolution (R {approx} 50, 000) optical spectrum of this object obtained with the 8.2 m Subaru telescope using High Dispersion Spectrograph on the 2012 January 13 offers sufficient spectral evidence that the object is a cool HdC star of RCB type undergoing light decline. In contrast to the Na I D broad absorption features seen in the low-resolution spectra on several occasions, the high-resolution spectrum exhibits Na I D{sub 2} and D{sub 1} features in emission. A few emission lines due to Mg I, Sc II, Ti I, Ti II, Fe II, and Ba I are also observed in the spectrum of this object for the first time. Such emission features combined with neutral and singly ionized lines of Ca, Ti, Fe, etc., in absorption are reportedly seen in RCBs spectra in the early stage of decline or during the recovery to maximum. Further, the light decline of RCBs is ascribed to the formation of a cloud of soot that obscures the visible photosphere. The presence of such circumstellar material is evident from the polarimetric observations with an estimated V-band percentage polarization of {approx}1.7% for this object.

Goswami, Aruna [Indian Institute of Astrophysics, Bangalore 560034 (India); Aoki, Wako, E-mail: aruna@iiap.res.in [National Astronomical Observatory, Mitaka, Tokyo 181-8588 (Japan)

2013-02-01

323

Subaru/HDS Study of HE 1015-2050: Spectral Evidence of R Coronae Borealis Light Decline  

NASA Astrophysics Data System (ADS)

Hydrogen deficiency and a sudden optical light decline of about 6-8 mag are two principal characteristics of R Coronae Borealis (RCB) stars. The high latitude carbon star HE 1015-2050 was identified as a hydrogen-deficient carbon star from low-resolution spectroscopy. Photometric data of the Catalina Real-Time Transient Survey gathered between 2006 February and 2012 May indicate that the object exhibits no variability. However, a high-resolution (R ~ 50, 000) optical spectrum of this object obtained with the 8.2 m Subaru telescope using High Dispersion Spectrograph on the 2012 January 13 offers sufficient spectral evidence that the object is a cool HdC star of RCB type undergoing light decline. In contrast to the Na I D broad absorption features seen in the low-resolution spectra on several occasions, the high-resolution spectrum exhibits Na I D2 and D1 features in emission. A few emission lines due to Mg I, Sc II, Ti I, Ti II, Fe II, and Ba I are also observed in the spectrum of this object for the first time. Such emission features combined with neutral and singly ionized lines of Ca, Ti, Fe, etc., in absorption are reportedly seen in RCBs spectra in the early stage of decline or during the recovery to maximum. Further, the light decline of RCBs is ascribed to the formation of a cloud of soot that obscures the visible photosphere. The presence of such circumstellar material is evident from the polarimetric observations with an estimated V-band percentage polarization of ~1.7% for this object.

Goswami, Aruna; Aoki, Wako

2013-02-01

324

The Visual Orbit of the 1.1 Day Spectroscopic Binary ?2 Coronae Borealis from Interferometry at the Chara Array  

NASA Astrophysics Data System (ADS)

We present an updated spectroscopic orbit and a new visual orbit for the double-lined spectroscopic binary ?2 Coronae Borealis (CrB) based on radial velocity measurements at the Oak Ridge Observatory in Harvard, MA and interferometric visibility measurements at the Center for High Angular Resolution Astronomy (CHARA) Array on Mount Wilson in California. ?2 CrB is composed of two Sun-like stars of roughly equal mass in a circularized orbit with a period of 1.14 days. The long baselines of the CHARA Array have allowed us to resolve the visual orbit for this pair, the shortest-period binary yet resolved interferometrically, enabling us to determine component masses of 1.137 ± 0.037 M sun and 1.090 ± 0.036 M sun. We have also estimated absolute V-band magnitudes of M V(primary) = 4.35 ± 0.02 and M V(secondary) = 4.74 ± 0.02. A comparison with stellar evolution models indicates a relatively young age of 0.1-3 Gyr, consistent with the high-Li abundance measured previously. This pair is the central component of a quintuple system, along with another similar-mass star, ?1 CrB, in a ~730-year visual orbit, and a distant M-dwarf binary, ? CrB C, at a projected separation of ~10'. We also present differential proper motion evidence to show that components C & D (ADS 9979C & D) listed for this system in the Washington Double Star Catalog are optical alignments that are not gravitationally bound to the ? CrB system.

Raghavan, Deepak; McAlister, Harold A.; Torres, Guillermo; Latham, David W.; Mason, Brian D.; Boyajian, Tabetha S.; Baines, Ellyn K.; Williams, Stephen J.; ten Brummelaar, Theo A.; Farrington, Chris D.; Ridgway, Stephen T.; Sturmann, Laszlo; Sturmann, Judit; Turner, Nils H.

2009-01-01

325

The Visual Orbit of the 1.1-day Spectroscopic Binary ?^2 Coronae Borealis from Interferometry at the CHARA Array  

E-print Network

We present an updated spectroscopic orbit and a new visual orbit for the double-lined spectroscopic binary \\sigma^2 Coronae Borealis based on radial velocity measurements at the Oak Ridge Observatory in Harvard, Massachusetts and interferometric visibility measurements at the CHARA Array on Mount Wilson. \\sigma^2 CrB is composed of two Sun-like stars of roughly equal mass in a circularized orbit with a period of 1.14 days. The long baselines of the CHARA Array have allowed us to resolve the visual orbit for this pair, the shortest period binary yet resolved interferometrically, enabling us to determine component masses of 1.137 \\pm 0.037 M_sun and 1.090 \\pm 0.036 M_sun. We have also estimated absolute V-band magnitudes of MV (primary) = 4.35 \\pm 0.02 and MV(secondary) = 4.74 \\pm 0.02. A comparison with stellar evolution models indicates a relatively young age of 1-3 Gyr, consistent with the high Li abundance measured previously. This pair is the central component of a quintuple system, along with another similar-mass star, \\sigma^1 CrB, in a ~ 730-year visual orbit, and a distant M-dwarf binary, \\sigma CrB C, at a projected separation of ~ 10 arcmin. We also present differential proper motion evidence to show that components C & D (ADS 9979C & D) listed for this system in the Washington Double Star Catalog are optical alignments that are not gravitationally bound to the \\sigma CrB system.

Deepak Raghavan; Harold A. McAlister; Guillermo Torres; David W. Latham; Brian D. Mason; Tabetha S. Boyajian; Ellyn K. Baines; Stephen J. Williams; Theo A. ten Brummelaar; Chris D. Farrington; Stephen T. Ridgway; Laszlo Sturmann; Judit Sturmann; Nils H. Turner

2008-08-29

326

Alterations in prey capture and induction of metallothioneins in grass shrimp fed cadmium-contaminated prey  

SciTech Connect

The aquatic oligochaete Limnodrilus hoffmeisteri from a Cd-contaminated cove on the Hudson River, Foundry Cove, New York, USA, has evolved Cd resistance. Past studies have focused on how the mode of detoxification of Cd by these Cd-resistant worms influences Cd trophic transfer to the grass shrimp Palaemonetes pugio. In the present study, the authors investigate reductions in prey capture in grass shrimp fed Cd-contaminated prey. They also investigate the induction of metal-binding proteins, metallothioneins, in these Cd-exposed shrimp. Grass shrimp were fed field-exposed Cd-contaminated Foundry Cove oligochaetes or laboratory-exposed Cd-contaminated Artemia salina. Following these exposures, the ability of Cd- dosed and control shrimp to capture live A. salina was compared. Results show that shrimp fed laboratory-exposed Cd-contaminated A. salina for 2 weeks exhibit significant reductions in their ability to successfully capture prey (live A. salina). Reductions in prey capture were also apparent, though not as dramatic in shrimp fed for 1 week on field-exposed Cd-contained Foundry Cove oligochaetes. Shrimp were further investigated for their subcellular distribution of Cd to examine if alterations in prey capture could be linked to saturation of Cd-metallothionein. Cd-dosed shrimp produced a low molecular weight CD-binding metallothionein protein in a dose- and time-dependent manner. Most importantly, successful prey capture decreased with increased Cd body burdens and increased Cd concentration bound to high molecular weight proteins.

Wallace, W.G.; Hoexum Brouwer, T.M.; Brouwer, M.; Lopez, G.R.

2000-04-01

327

Social and ecological challenges of market-oriented shrimp farming in Vietnam.  

PubMed

Vietnam is one of the largest shrimp exporters in the world. Since 2010, Vietnam has earned about two billion dollars annually through shrimp exports. As a fertile area of greatest potential for agricultural production in Vietnam, the Mekong Delta has been a major contributor to the country's achievements, especially in the agricultural sector. During recent decades, trade liberation along with various policies in support of aquaculture has accelerated the development of shrimp production in the Delta. Based on an ethnographic study of shrimp farming in the Mekong Delta of Vietnam, I assert that along with great rewards arising from the expansion of shrimp farming areas, productivity, and export value, the shrimp industry has brought various environmental, economic and social challenges. Consequently, shrimp farming is a risky business and local inhabitants have relied on various strategies to cope with these challenges. Risk mitigation in shrimp production and labor migration are the two important strategies of local inhabitants for securing their livelihoods. Water pollution and poor quality post-larvae shrimp are direct consequences of market-oriented production. PMID:24386621

Lan, Ngo Thi Phuong

2013-01-01

328

Simulated gastrointestinal digestion reduces the allergic reactivity of shrimp extract proteins and tropomyosin.  

PubMed

Shrimp are highly allergenic foods. Current management are limited to the avoidance of foods. Therefore, there is an unmet need for a safe and effective therapy using modified allergens. This study focuses on assessing the potential for modification of the allergenicity of shrimp proteins following heat treatment or simulated gastric digestion. Shrimp proteins do not reduce their IgE reactivity after heat treatment but it is reduced by simulated gastric digestion in a time- and dose-dependent manner. Tropomyosin in shrimp extract is worse digested than purified tropomyosin. After 60 min of 10 U/?g pepsin digestion, a strong inhibition was produced in the in vivo skin reactivity of shrimp extracts and in activation of basophils from allergic patients. Immunisation experiments performed in rabbits demonstrated that digested boiled shrimp extract is able to induce IgG antibodies that block the IgE binding to the untreated boiled shrimp extract in shrimp-allergic patients. Building on our observations, digestion treatment could be an effective method for reducing shrimp allergenicity while maintaining the immunogenicity. PMID:25466048

Gámez, Cristina; Zafra, Ma Paz; Sanz, Verónica; Mazzeo, Carla; Ibáñez, Ma Dolores; Sastre, Joaquín; del Pozo, Victoria

2015-04-15

329

Shrimp Lipids: A Source of Cancer Chemopreventive Compounds  

PubMed Central

Shrimp is one of the most popular seafoods worldwide, and its lipids have been studied for biological activity in both, muscle and exoskeleton. Free fatty acids, triglycerides, carotenoids, and other lipids integrate this fraction, and some of these compounds have been reported with cancer chemopreventive activities. Carotenoids and polyunsaturated fatty acids have been extensively studied for chemopreventive properties, in both in vivo and in vitro studies. Their mechanisms of action depend on the lipid chemical structure and include antioxidant, anti-proliferative, anti-mutagenic, and anti-inflammatory activities, among others. The purpose of this review is to lay groundwork for future research about the properties of the lipid fraction of shrimp. PMID:24135910

López-Saiz, Carmen-María; Suárez-Jiménez, Guadalupe-Miroslava; Plascencia-Jatomea, Maribel; Burgos-Hernández, Armando

2013-01-01

330

Mating behaviour, epibiotic growth, and the effect of salinity on grooming activity in the hermaphroditic shrimp Lysmata wurdemanni  

E-print Network

Many species of caridean shrimp are protandrous hermaphrodites, maturing initially as males but developing into females as they age and grow. A unique sexual system was recently discovered in the peppermint shrimp, Lysmata wurdemanni...

Giri, Tuhin

2004-09-30

331

77 FR 64102 - Frozen Warmwater Shrimp From the Socialist Republic of Vietnam: Amended Final Results and Partial...  

Federal Register 2010, 2011, 2012, 2013, 2014

...7\\ The Domestic Producers are the Ad Hoc Shrimp Trade Action Committee members: Nancy Edens; Papa Rod, Inc.; Carolina Seafoods; Bosarge Boats, Inc.; Knight's Seafood Inc.; Big Grapes, Inc.; Versaggi Shrimp...

2012-10-18

332

77 FR 63786 - Certain Frozen Warmwater Shrimp From the Socialist Republic of Vietnam: Notice of Court Decision...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Shrimp From the Socialist Republic of Vietnam: Notice of Court Decision Not in Harmony...Review of Grobest & I Mei Industrial (Vietnam) Co., Ltd., and Notice of Amended...shrimp'') from the Socialist Republic of Vietnam (``Vietnam'') for the period...

2012-10-17

333

78 FR 18958 - Certain Frozen Warmwater Shrimp From the People's Republic of China and Diamond Sawblades and...  

Federal Register 2010, 2011, 2012, 2013, 2014

...WTO'') in United States--Anti-Dumping Measures on Certain Shrimp and Diamond...settlement panel in United States--Anti-Dumping Measures on Certain Shrimp and Diamond...Department recalculated the weighted-average dumping margins from the antidumping...

2013-03-28

334

76 FR 30034 - Fisheries of the Caribbean, Gulf of Mexico, and South Atlantic; Shrimp Fishery Off the Southern...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Commercial Penaeid Shrimp Trawling Off South Carolina AGENCY: National Marine Fisheries...exclusive economic zone (EEZ) off South Carolina in the South Atlantic. NMFS previously...shrimp trawling in the EEZ off South Carolina on March 22, 2011. The...

2011-05-24

335

IMPACT OF BURROWING SHRIMP POPULATIONS ON C, N CYCLING AND WATER QUALITY IN WESTERN NORTH AMERICAN TEMPERATE ESTUARIES  

EPA Science Inventory

Thalassinid burrowing shrimp (predominantly, Neotrypaea californiensis and Upogebia pugettensis) inhabit large expanses of tide flats in North American Pacific estuaries, from British Columbia to Baja California. Feeding, burrowing, and burrow irrigation by burrowing shrimp can ...

336

IMPACT OF BURROWING SHRIMP POPULATIONS ON NITROGEN CYCLING AND WATER QUALITY IN WESTERN NORTH AMERICAN TEMPERATE ESTUARIES  

EPA Science Inventory

Thalassinid burrowing shrimp (predominantly, Neotrypaea californiensis and Upogebia pugettensis) inhabit large expanses of tide flats in North American Pacific estuaries, from British Columbia to Baja California. Feeding, burrowing, and burrow irrigation by burrowing shrimp can ...

337

DISTRIBUTION AND ABUNDANCE OF BURROWING SHRIMP IN TWO OREGON ESTUARIES AND IMPLICATIONS FOR ESTUARINE-SCALE NITROGEN DYNAMICS  

EPA Science Inventory

Thalassinid burrowing shrimp (Neotrypaea californiensis and Upogebia pugettensis) inhabit large expanses of Pacific estuarine tide flats, from British Columbia to Baja California. The spatial distribution of shrimp populations within estuaries has rarely been quantified because ...

338

Issues, impacts, and implications of shrimp aquaculture in Thailand  

Microsoft Academic Search

Water quality impacts to and from intensive shrimp aquaculture in Thailand are substantial. Besides the surface and subsurface\\u000a salinization of freshwaters, loadings of solids, oxygen-consuming organic matter, and nutrients to receiving waters are considerable\\u000a when the cumulative impacts from water exchange during the growout cycle, pond drainage during harvesting, and illegal pond\\u000a sediment disposal are taken into account. Although just

Forrest E. Dierberg; Woraphan Kiattisimkul

1996-01-01

339

Toxicity of Fusarium sambucinum Fuckel sensu lato to brine shrimp  

Microsoft Academic Search

In a screening test sevenFusarium strains out of 17 proved to be toxic towards brine shrimp. Among these, fourF. sambucinum strains as well as threeF. venenatum isolates caused toxic effects. The chemical screening by TLC analysis revealed the presence of sambucinol and diacetoxyscirpenol\\u000a in the extracts of the toxic isolates ofF. venenatum 64537.

R. Schmidt; P. Zajkowski; J. Wink

1995-01-01

340

Economic feasibility of commercial shrimp farming in Texas  

E-print Network

corducive to harvesting and accessible to supplementary equipment. Since the model is based upon the Texas API University experimental shrimp farm, the location of 10 the facility must be near the sea water source. In recent years land prices in..., insurance for each crop would be approximately $ percent of the cost of the seed stock. Standard insurance companies can be used. for in- suring the facility and its supplementary equipment. Nost of the equipment will be insurable at standard rates...

Williams, Robert James

1973-01-01

341

Effect of Shrimp Chitin and Shrimp Chitin Hydrolysate on the Freeze-Induced Denaturation, and on the Amount of Unfreezable Water of Wanieso Lizardfish Myofibrillar Protein  

NASA Astrophysics Data System (ADS)

In view of potential utilization of shrimp waste, shrimp chitin (SC) and shrimp chitin hydrolysate (SCH) were prepared from 3 kinds of shrimp species, namely: black tiger shrimp Penaeus monodon, endeavour shrimp Metapenaeus endeavouri and giant freshwater shrimp Macrobrachium rosenbergii. The effects of 5% SC and SCH (dry weight) on the state of water and on the denaturation of wanieso lizardfish Saurida wanieso myofibrillar protein (Mf) were evaluated based on changes in Mf Ca-ATPase activity and the amount of unfreezable water during frozen storage. Each effect was compared with those of Mf without additives (control) and Mf with glucose. The changes in Ca-ATPase activity of control and Mf with SC during frozen storage were exhibited biphasic pattern while those of SCH and glucose exhibited monophasic pattern. The amount of unfreezable water of Mf with SC was lower than that of control while those of Mf with SCH and glucose were higher than that of control. Present findings suggested that the preventive effect of SCH on freeze-induced denaturation of Mf is caused by the stabilizing the hydrated water molecule surrounding the Mf.

Somjit, Kingduean; Kongpun, Orawan; Osatomi, Kiyoshi; Hara, Kenji; Nozaki, Yukinori

342

Shrimps that pay attention: saccadic eye movements in stomatopod crustaceans  

PubMed Central

Discovering that a shrimp can flick its eyes over to a fish and follow up by tracking it or flicking back to observe something else implies a ‘primate-like’ awareness of the immediate environment that we do not normally associate with crustaceans. For several reasons, stomatopods (mantis shrimp) do not fit the general mould of their subphylum, and here we add saccadic, acquisitional eye movements to their repertoire of unusual visual capabilities. Optically, their apposition compound eyes contain an area of heightened acuity, in some ways similar to the fovea of vertebrate eyes. Using rapid eye movements of up to several hundred degrees per second, objects of interest are placed under the scrutiny of this area. While other arthropod species, including insects and spiders, are known to possess and use acute zones in similar saccadic gaze relocations, stomatopods are the only crustacean known with such abilities. Differences among species exist, generally reflecting both the eye size and lifestyle of the animal, with the larger-eyed more sedentary species producing slower saccades than the smaller-eyed, more active species. Possessing the ability to rapidly look at and assess objects is ecologically important for mantis shrimps, as their lifestyle is, by any standards, fast, furious and deadly. PMID:24395969

Marshall, N. J.; Land, M. F.; Cronin, T. W.

2014-01-01

343

Chronic toxicity of nitrate to Pacific white shrimp, Litopenaeus vannamei: Impacts on survival, growth, antennae length, and pathology  

Microsoft Academic Search

Chronic toxicity of nitrate (NO3?) has not been well documented in the culture of penaeid shrimp. To interpret this problem, lab-scale research was conducted in recirculating aquaculture systems (RAS) to determine the long-term impacts of nitrate on shrimp growth, survival, total mass of shrimp per system (shrimp biomass), antennae length, and tissue pathology. The first experiment, Trial (A), was performed

David D. Kuhn; Stephen A. Smith; Gregory D. Boardman; Matthew W. Angier; Lori Marsh; George J. Flick

2010-01-01

344

Abundance and size of Gulf shrimp in Louisiana's coastal estuaries following the Deepwater Horizon oil spill.  

PubMed

The Deepwater Horizon oil spill impacted Louisiana's coastal estuaries physically, chemically, and biologically. To better understand the ecological consequences of this oil spill on Louisiana estuaries, we compared the abundance and size of two Gulf shrimp species (Farfantepeneus aztecus and Litopeneus setiferus) in heavily affected and relatively unaffected estuaries, before and after the oil spill. Two datasets were used to conduct this study: data on shrimp abundance and size before the spill were available from Louisiana Department of Wildlife and Fisheries (LDWF). Data on shrimp abundance and size from after the spill were independently collected by the authors and by LDWF. Using a Before-After-Control-Impact with Paired sampling (BACIP) design with monthly samples of two selected basins, we found brown shrimp to become more abundant and the mean size of white shrimp to become smaller. Using a BACIP with data on successive shrimp year-classes of multiple basins, we found both species to become more abundant in basins that were affected by the spill, while mean shrimp size either not change after the spill, or increased in both affected and unaffected basins. We conclude that following the oil spill abundances of both species increased within affected estuaries, whereas mean size may have been unaffected. We propose two factors that may have caused these results: 1) exposure to polycyclic aromatic hydrocarbons (PAHs) may have reduced the growth rate of shrimp, resulting in a delayed movement of shrimp to offshore habitats, and an increase of within-estuary shrimp abundance, and 2) fishing closures established immediately after the spill, may have resulted in decreased fishing effort and an increase in shrimp abundance. This study accentuates the complexities in determining ecological effects of oil spills, and the need of studies on the organismal level to reveal cause-and-effect relationships of such events. PMID:25272142

van der Ham, Joris L; de Mutsert, Kim

2014-01-01

345

Evolution of specific immunity in shrimp - a vaccination perspective against white spot syndrome virus.  

PubMed

Invertebrates lack true adaptive immunity and it solely depends on the primitive immunity called innate immunity. However, various innate immune molecules and mechanisms are identified in shrimp that plays potential role against invading bacterial, fungal and viral pathogens. Perceiving the shrimp innate immune mechanisms will contribute in developing effective vaccine strategies against major shrimp pathogens. Hence this review intends to explore the innate immune molecules of shrimp with suitable experimental evidences together with the evolution of "specific immune priming" of invertebrates. In addition, we have emphasized on the development of an effective vaccine strategy against major shrimp pathogen, white spot syndrome virus (WSSV). The baculovirus displayed rVP28 (Bac-VP28), a major envelope protein of WSSV was utilized to study its vaccine efficacy by oral route. A significant advantage of this baculovirus expression cassette is the use of WSSV-immediate early 1 (ie1) promoter that derived the abundant expression of rVP28 protein at the early stage of the infection in insect cell. The orally vaccinated shrimp with Bac-VP28 transduced successfully in the shrimp cells as well as provided highest survival rate. In support to our vaccine efficacy we analysed Pattern Recognition Proteins (PRPs) ?-1,3 glucan lipopolysaccharides (LGBP) and STAT gene profiles in the experimental shrimp. Indeed, the vaccination of shrimp with Bac-VP28 demonstrated some degree of specificity with enhanced survival rate when compared to control vaccination with Bac-wt. Hence it is presumed that the concept of "specific immune priming" in relevant to shrimp immunity is possible but may not be common to all shrimp pathogens. PMID:24780624

Syed Musthaq, Syed Khader; Kwang, Jimmy

2014-10-01

346

Reprint of "evolution of specific immunity in shrimp - a vaccination perspective against white spot syndrome virus".  

PubMed

Invertebrates lack true adaptive immunity and it solely depends on the primitive immunity called innate immunity. However, various innate immune molecules and mechanisms are identified in shrimp that plays potential role against invading bacterial, fungal and viral pathogens. Perceiving the shrimp innate immune mechanisms will contribute in developing effective vaccine strategies against major shrimp pathogens. Hence this review intends to explore the innate immune molecules of shrimp with suitable experimental evidences together with the evolution of "specific immune priming" of invertebrates. In addition, we have emphasized on the development of an effective vaccine strategy against major shrimp pathogen, white spot syndrome virus (WSSV). The baculovirus displayed rVP28 (Bac-VP28), a major envelope protein of WSSV was utilized to study its vaccine efficacy by oral route. A significant advantage of this baculovirus expression cassette is the use of WSSV-immediate early 1 (ie1) promoter that derived the abundant expression of rVP28 protein at the early stage of the infection in insect cell. The orally vaccinated shrimp with Bac-VP28 transduced successfully in the shrimp cells as well as provided highest survival rate. In support to our vaccine efficacy we analysed Pattern Recognition Proteins (PRPs) ?-1,3 glucan lipopolysaccharides (LGBP) and STAT gene profiles in the experimental shrimp. Indeed, the vaccination of shrimp with Bac-VP28 demonstrated some degree of specificity with enhanced survival rate when compared to control vaccination with Bac-wt. Hence it is presumed that the concept of "specific immune priming" in relevant to shrimp immunity is possible but may not be common to all shrimp pathogens. PMID:25083808

Syed Musthaq, Syed Khader; Kwang, Jimmy

2015-02-01

347

These Squatters Are Not Innocent: The Evidence of Parasitism in Sponge-Inhabiting Shrimps  

PubMed Central

Marine sponges are frequently inhabited by a wide range of associated invertebrates, including caridean shrimps. Symbiotic shrimps are often considered to be commensals; however, in most cases, the relationship with sponge hosts remains unclear. Here we demonstrate that sponge-inhabiting shrimps are often parasites adapted to consumption of sponge tissues. First, we provide detailed examination of morphology and stomach contents of Typton carneus (Decapoda: Palaemonidae: Pontoniinae), a West Atlantic tropical shrimp living in fire sponges of the genus Tedania. Remarkable shear-like claws of T. carneus show evidence of intensive shearing, likely the result of crushing siliceous sponge spicules. Examination of stomach contents revealed that the host sponge tissue is a major source of food for T. carneus. A parasitic mode of life is also reflected in adaptations of mouth appendages, in the reproduction strategy, and in apparent sequestration of host pigments by shrimp. Consistent results were obtained also for congeneric species T. distinctus (Western Atlantic) and T. spongicola (Mediterranean). The distribution of shrimps among sponge hosts (mostly solitary individuals or heterosexual pairs) suggests that Typton shrimps actively prevent colonisation of their sponge by additional conspecifics, thus protecting their resource and reducing the damage to the hosts. We also demonstrate feeding on host tissues by sponge-associated shrimps of the genera Onycocaris, Periclimenaeus, and Thaumastocaris (Pontoniinae) and Synalpheus (Alpheidae). The parasitic mode of life appears to be widely distributed among sponge-inhabiting shrimps. However, it is possible that under some circumstances, the shrimps provide a service to the host sponge by preventing a penetration by potentially more damaging associated animals. The overall nature of interspecific shrimp-sponge relationships thus warrants further investigation. PMID:21814564

?uriš, Zden?k; Horká, Ivona; Jura?ka, Petr Jan; Petrusek, Adam; Sandford, Floyd

2011-01-01

348

Description of three ecology studies on brown shrimp Penaeus aztecus and white shrimp P. setiferus conducted by the National Marine Fisheries Service, Galveston, Texas  

E-print Network

scientists on several different projects. Most of the projects were designed to study different aspects on the ecology of penaeid shrimp, mainly those that could affect shrimp populations and thus an important f1shery resource. This paper conta1ns... separate reports of the three main project on which I had the opportunity to work. The first one was a study on the abundance of brown shrimp, Panaeus aztecus, in vegetated and non- vegetated habitats in a Lou1siana salt marsh where the dominant species...

Diego, Maria Eugenia de

1984-01-01

349

Larviculture of native white shrimp, Penaeus setiferus, and exotic white shrimp, P. vannanmei at Continental Fisheries, Limited, Panama City, Florida  

E-print Network

in 1934 when Dr. Motosaku Fuginaga, Japan's fatner of shrimp mariculture, successfully spawned and partially reared larvae of penaeus j aponi cus ( Mock 1975 ) . In 1963 Dr . Fugi naga visited the United States and spent some time at the National... Marine Fisheries Service ( NMFS ) laboratory in Galveston, Texas. At this time Dr. Fuginaga and Mr. Harry Cook and others of the NMFS Galveston laboratory experimented witn Japanese methods and spawned and reared larvae of P. setiferus and P. aztecus...

Aranyakananda, Porcham

1985-01-01

350

Predictive Computer Modeling of Growth and Feeding Rates for Pacific White Shrimp, Penaeus vanammei, in Hard Freshwater  

Microsoft Academic Search

If the United States is to find its niche in shrimp aquaculture production, non-traditional methods of shrimp farming must be used to overcome the climatic incompatibility and strict environmental regulations. Non-traditional shrimp production must also find ways to significantly reduce capital and operational costs. Recirculating aquaculture systems (RAS), which support high population densities and precise control of the suitable growth

Anthony F. Pegel; J. Richard Booth

351

An Assessment of the Economic Importance of the San Carlos Island Shrimp Processing Industry to the Lee County Economy  

E-print Network

to the Lee County Economy Chuck Adams, David Mulkey, and Alan Hodges Food and Resource Economics Department the shrimp processing industry on San Carlos Island contributes to the Lee County economy. Most of the shrimp of the revenues earned on a trip are spent within the Lee County economy. During seasons when shrimp landings

Florida, University of

352

Simulation of phosphorus dynamics in an intensive shrimp culture system: effects of feed formulations and feeding strategies  

Microsoft Academic Search

The rapid expansion of shrimp culture has brought concern about potential environmental impacts caused by phosphorus wastes discharged from shrimp farms. This study describes development of a simulation model representing the effect of feed nutritional quality, feed physical characteristics, and feeding strategies on phosphorus dynamics in intensive Pacific white shrimp (Litopenaeus vannamei) culture systems, receiving dry feeds in the absence

Ruby A. Montoya; A. L. Lawrence; M. Velasco

2000-01-01

353

First record of a parasitic septate gregarines (Apicomplexa: Sporozoea) in the shrimp Peneaus monodon in Sundarbans of West Bengal  

Microsoft Academic Search

Investigations on the incidence of septate gregarines in shrimp have immense importance because of severe pathogenicity of\\u000a the parasite. The septate gregarines infect the midgut of shrimp Peneaus monodon and severe infection disturbs the intestinal tissues. Mostly gregarines of the genus Nematopsis have been identified from cultured peneaid shrimp. It has worldwide in distribution. In India, gregarine parasites have so

J. Chakraborti; P. K. Bandyopadhyay

2010-01-01

354

Non-Stationary Markov Process Analysis of the Size Distribution of Shrimp Processing Firms in the Southeast United States  

Microsoft Academic Search

The shrimp harvesting sector is the largest component of the Southeastern United States fishing industry, accounting for 57% of the total value of landings in the region in 1996. U.S. shrimp imports were valued at $2.6 billion in 1996. Together , domestic production and imports of raw products support a large shrimp processing sector, which provides several thousand jobs either

Hamady Diop; Wes R. Harrison; Walter R. Keithly

2000-01-01

355

75 FR 37757 - Frozen Warmwater Shrimp from the Socialist Republic of Vietnam: Notice of Extension of Time Limit...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Administration [A-552-802] Frozen Warmwater Shrimp from...Notice of Extension of Time Limit for the Final Results...antidumping duty order on frozen warmwater shrimp from...31, 2009. See Certain Frozen Warmwater Shrimp from...2010. Extension of the Time for the Final...

2010-06-30

356

75 FR 34976 - Certain Frozen Warmwater Shrimp from Thailand: Notice of Extension of Time Limit for the Final...  

Federal Register 2010, 2011, 2012, 2013, 2014

...A-549-822 Certain Frozen Warmwater Shrimp from...Notice of Extension of Time Limit for the Final Results...duty order on certain frozen warmwater shrimp from...31, 2009. See Certain Frozen Warmwater Shrimp from...review. Extension of Time Limit for the Final...

2010-06-21

357

76 FR 55350 - Certain Frozen Warmwater Shrimp From the Socialist Republic of Vietnam: Extension of Time Limit...  

Federal Register 2010, 2011, 2012, 2013, 2014

...A-552-802] Certain Frozen Warmwater Shrimp...Vietnam: Extension of Time Limit for the Preliminary...decided to extend the time limit for the preliminary...order on certain frozen warmwater shrimp...2\\ See Certain Frozen Warmwater Shrimp...Statutory Time Limits Section...

2011-09-07

358

75 FR 62099 - Certain Frozen Warmwater Shrimp From India and Thailand: Notice of Extension of Time Limits for...  

Federal Register 2010, 2011, 2012, 2013, 2014

...A-549-822] Certain Frozen Warmwater Shrimp From...Notice of Extension of Time Limits for the Preliminary...administrative review of certain frozen warmwater shrimp from...10, 2010. See Certain Frozen Warmwater Shrimp from...Extension of Time Limit of Preliminary...

2010-10-07

359

76 FR 61668 - Certain Frozen Warmwater Shrimp From India and Thailand: Notice of Extension of Time Limits for...  

Federal Register 2010, 2011, 2012, 2013, 2014

...A-549-822] Certain Frozen Warmwater Shrimp From...Notice of Extension of Time Limits for the Preliminary...duty orders on certain frozen warmwater shrimp From...31, 2011. See Certain Frozen Warmwater Shrimp From...2011). Extension of Time Limit of Preliminary...

2011-10-05

360

75 FR 24883 - Certain Frozen Warmwater Shrimp from the Socialist Republic of Vietnam: Extension of Time Limits...  

Federal Register 2010, 2011, 2012, 2013, 2014

...A-552-802] Certain Frozen Warmwater Shrimp from...Vietnam: Extension of Time Limits for Preliminary...duty orders on certain frozen warmwater shrimp from...duty order on certain frozen warmwater shrimp are currently...respectively. Extension of Time Limits for...

2010-05-06

361

75 FR 27299 - Certain Frozen Warmwater Shrimp from Brazil, India, the People's Republic of China and Thailand...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Certain Frozen Warmwater Shrimp from Brazil, India, the People's Republic of China and...certain frozen warmwater shrimp from Brazil, India, the People's Republic of China (PRC...certain frozen warmwater shrimp from Brazil, India, the PRC, and Thailand. See Notice...

2010-05-14

362

Chandra, Extreme Ultraviolet Explorer, and Very Large Array Observations of the Active Binary System ?2 Coronae Borealis  

NASA Astrophysics Data System (ADS)

We present the results of a coordinated observing campaign on the short-period RS CVn binary ?2 Coronae Borealis (F6V+G0V Porb=1.14 days) with the Very Large Array, the Extreme Ultraviolet Explorer, and the Chandra X-Ray Observatory High-Energy Transmission Grating Spectrometer. The radio emission is consistent with previously determined quiescent gyrosynchrotron properties. Multiple flares were seen with Extreme Ultraviolet Explorer, five occurring within two consecutive orbital periods. The first of these flares was observed with Chandra. The Chandra observations of ?2 CrB showed no systematic variations of line fluxes, widths, or Doppler shifts with orbital phase, nor any response in line width or offset due to the flare. This is consistent with both stars being equally active coronal emitters. We have developed a self-consistent method of spectral analysis to derive information from the line and continuum emissions concerning the distribution of plasma with temperature and elemental abundances. A bimodal temperature distribution is appropriate for both quiescent and flare intervals, with a stable peak at 6-8 MK and another variable enhancement at higher temperatures, with evidence for significant contribution from temperatures up to 50 MK during the flare, compared to 30 MK during quiescence. The iron abundance is subsolar during quiescence but is enriched by about a factor of 2 during a large flare seen with Chandra. The noble gas elements neon and argon show elevated abundances with respect to iron, but there is no clear evidence for any first ionization potential-based abundance pattern during quiescence or the flare. We have determined coronal electron densities from the helium-like ions O VII, Ne IX, Mg XI, and Si XIII, which imply densities >=1010 cm-3. There is a small enhancement in the electron densities derived for the flare, but it is not statistically significant. We call attention to electron temperature constraints provided by the ratios of 1s2 1S0-1snp 1P1 transitions of the helium-like ions O VII, Ne IX, Mg XI, and Si XIII. The derived coronal electron pressures change by 1-2 orders of magnitude over a 25% change in temperature, implying nonisobaric coronal conditions. We find no evidence for significant departures from the effectively thin coronal assumption. The electron densities inferred from the soft X-ray spectra are inconsistent with cospatial gyrosynchrotron emission; further observations are necessary to discriminate the relative locations of the radio and soft X-ray-emitting plasma.

Osten, Rachel A.; Ayres, Thomas R.; Brown, Alexander; Linsky, Jeffrey L.; Krishnamurthi, Anita

2003-01-01

363

Clues to the Evolution of the R Coronae Borealis Stars from their Unique 16O/18O ratios  

NASA Astrophysics Data System (ADS)

We report new spectroscopic observations of the CO bands near 2.3 micron in order to measure the 16O/18O isotopic ratio in the R Coronae Borealis (RCB) stars using IRTF/SpeX. These observations of ten additional stars confirm the remarkable discovery made a few years ago that the hydrogen-deficient carbon (HdC) and RCB stars have 16O/18O ratios that are close to and in some cases less than unity, values that are orders of magnitude smaller than measured in other stars (the Solar value is 500). The RCB stars are a small group of carbon-rich supergiants. Only about 100 RCB stars are known in the Galaxy. Their defining characteristics are hydrogen deficiency and unusual variability - RCB stars undergo massive declines of up to 8 mag due to the formation of carbon dust at irregular intervals. The six known HdC stars are very similar to the RCB stars spectroscopically, but do not show declines or IR excesses. Two scenarios have been proposed for the origin of an RCB star: the double degenerate and the final helium-shell flash models. The former involves the merger of a CO- and a He-white dwarf. In the latter, a star evolving into a planetary nebula central star expands to supergiant size by a final, helium-shell flash. Greatly enhanced 18O is evident in every HdC and RCB we have measured that is cool enough to have detectable CO bands. This discovery is important evidence to help distinguish between the proposed evolutionary pathways of HdC and RCB stars. No overproduction of 18O is expected in a final flash, so we are investigating the merger scenario. We are working to reproduce the observed 16O/18O ratios by performing hydrodynamical simulations of the merger of CO- and He-WDs to investigate the formation of RCB stars. We are also using the MESA stellar evolution and NuGrid nucleosynthesis codes to construct post-merger 1D spherical models and follow their evolution into the region of the HR diagram where RCB stars are located.

Clayton, Geoffrey C.; Montiel, Edward J.; Geballe, Thomas R.; Welch, Douglas L.; Tisserand, Patrick

2014-06-01

364

Hydraulic activities by ghost shrimp Neotrypaea californiensis induce oxic-anoxic oscillations in sediments  

EPA Science Inventory

We applied porewater pressure sensing, time-lapse photography and planar optode imaging of oxygen to investigate hydraulic behaviors of the Thalassinidean ghost shrimp Neotrypaea californiensis and the associated dynamics of oxygen in and around their burrows. Ghost shrimp were h...

365

The use of indole as a potential quality index for fresh, frozen, cooked and canned shrimp  

E-print Network

modified colorimetric method for the determination of indole in shrimp. In press. Cheuk, W. L. , Finne, G. and Nickelson, R. 1979, Sta'bility of adeno- sine deaminase and adenosine moncphosphate deaminase during ice storage of pink and brown shrimp from...

Chang, Olivia Hui-Fen

1981-01-01

366

Genetic diversity of wild and cultured Black Tiger Shrimp ( Penaeus monodon) in the Philippines using microsatellites  

Microsoft Academic Search

Six microsatellites were used to study (1) the genetic diversity of wild Penaeus monodon shrimp from four geographic regions (Palawan, Quezon, Capiz and Negros Occidental-W) in the Philippines, and (2) its association with the status of mangroves and intensity of shrimp culture systems in these regions. Two cultured populations (Negros Occidental-C and Antique) were used for comparison. All six microsatellite

Zhenkang Xu; Jurgenne H Primavera; Leobert D de la Pena; Priscilla Pettit; Jane Belak; Acacia Alcivar-Warren

2001-01-01

367

Growth overfishing in the brown shrimp fishery of Texas, Louisiana, and adjoining Gulf of Mexico EEZ  

Microsoft Academic Search

Growth overfishing in the brown shrimp, Farfantepenaeus aztecus, fishery in inshore (estuarine) and offshore (Gulf of Mexico) territorial waters of Texas and Louisiana, and adjoining waters of the United States’ (U.S.) Exclusive Economic Zone (EEZ), and its potentially detrimental economic consequences to the harvesting sector, have not been among major concerns of Federal and State shrimp management agencies. Three possible

C CAILLOUETJR; R. A. Hart; J. M. Nance

2008-01-01

368

Immunity enhancement in black tiger shrimp ( Penaeus monodon) by a probiont bacterium ( Bacillus S11)  

Microsoft Academic Search

Survival and growth of Penaeus monodon fed the probiont Bacillus S11 in two 90-day culture trials were increased compared with non-treated shrimp. Bacillus S11 also efficiently activated and increased the engulfment of foreign particles (phagocytic activity) as measured by % phagocytosis and phagocytic index (PI) in hemolymph. Phenoloxidase and antibacterial activities increased with age in all shrimp, but were even

Sirirat Rengpipat; Sombat Rukpratanporn; Somkiat Piyatiratitivorakul; Piamsak Menasaveta

2000-01-01

369

BIOACCUMULATION OF KEPONE BY GRASS SHRIMP (PALAEMONETIS PUGIO): IMPORTANCE OF DIETARY ACCUMULATION AND INGESTION RATE  

EPA Science Inventory

The relative extent of dietary accumulation and bioconcentration of Kepone by grass shrimp (Palaemonetes pugio) was quantitatively evaluated at food rations of 4 and of the average wet weight of the shrimp. 14C]Kepone was utilized to determine bioconcentration and dietary accumul...

370

FEEDING RATES OF THE MUD SHRIMP UPOGEBIA PUGETTENSIS AND IMPLICATIONS FOR ESTUARINE PHYTOPLANKTON ABUNDANCE  

EPA Science Inventory

The burrowing shrimp Upogebia pugettensis is an abundant inhabitant of Pacific Northwest bays and estuaries where it lives commensally with the clam Cryptomya californica. Suspension-feeding activities of the shrimp and its commensal clam, as well as particle settlement within t...

371

Modeling Shrimp Biomass and Viral Infection for Production of Biological Countermeasures  

E-print Network

Modeling Shrimp Biomass and Viral Infection for Production of Biological Countermeasures H. T 29422 December 9, 2005 Abstract In this paper we develop a mathematical model for the rapid production production with those for vaccine production in shrimp that have been infected with a recombinant viral

372

Mitochondrial Pseudogenes Are Pervasive and Often Insidious in the Snapping Shrimp Genus Alpheus  

Microsoft Academic Search

Here we show that multiple DNA sequences, similar to the mitochondrial cytochrome oxidase I (COI) gene, occur within single individuals in at least 10 species of the snapping shrimp genus Alpheus. Cloning of amplified products revealed the presence of copies that differed in length and (more frequently) in base substitutions. Although multiple copies were amplified in individual shrimp from total

S. T. Williams; N. Knowlton

2002-01-01

373

USE OF THE GRASS SHRIMP 'PALAEMONETES PUGIO' IN A LIFE-CYCLE TOXICITY TEST  

EPA Science Inventory

A methodology for using the estuarine grass shrimp (Palaemonetes pugio) in life-cycle toxicity tests was successfully developed. Life-cycle exposures of juvenile shrimp (12 to 19 mm in rostrum-telson length) to the chlorinated hydrocarbon pesticide endrin were begun in November 1...

374

77 FR 31062 - Programs To Reduce Incidental Capture of Sea Turtles in Shrimp Fisheries; Certifications Pursuant...  

Federal Register 2010, 2011, 2012, 2013, 2014

...environments in 26 other countries and one economy do not pose a threat of the incidental...certified 26 shrimp harvesting nations and one economy as having fishing environments that do...Kingdom, and Uruguay. Ten nations and one economy only harvest shrimp using small...

2012-05-24

375

The Relationship Between Shrimp Yields and Intertidal Vegetation (Mangrove) Areas: A Reassessment  

Microsoft Academic Search

Three data sets (one from a worldwide survey, one from Indonesia and one using Philippine data) are combined to derive a single relationship linking penaeid shrimp yield, intertidal vegetation area (mainly mangrove) and latitude. This relationship, being logarithmic, cannot be used to compute precise estimates of shrimp fishery losses, given destruction or reclamation of a given surface area of intertidal

Daniel Pauly; Jose Ingles

1999-01-01

376

Pilot scale lactic acid fermentation of shrimp wastes for chitin recovery  

Microsoft Academic Search

Lactic fermentation of shrimp waste on solid substrates was studied as a means of preservation for chitin recovery. Shrimp wastes were fermented in 100-g flasks with varying levels of inoculation with lactobacilli as well as different types and levels of carbohydrate. Sucrose was selected as the carbohydrate source in further experimental work due to its better acid production potential as

Luis A Cira; Sergio Huerta; George M Hall; Keiko Shirai

2002-01-01

377

Comparison of Lactic Acid Bacteria Fermentation with Acid Treatments for Chitosan Production from Shrimp Waste  

Microsoft Academic Search

The traditional procedure for chitosan production involves use of a strong acid (HCl) for demineralization of chitin. This study reports application of a mixed culture of lactic acid bacteria (Lactobacillus plantarum, Lactobacillus acidophilus, and Lactobacillus lactis) fermentation in demineralization of chitin for chitosan production from shrimp waste. Chitosan produced from shrimp waste with lactic acid bacteria fermentation at 30°C for

Sureerat Phuvasate; Yi-Cheng Su

2010-01-01

378

Frozen Commodity Shrimp: Potential Avenue for Introduction of White Spot Syndrome Virus and Yellow Head Virus  

Microsoft Academic Search

Since 1992, white spot syndrome virus (WSSV) and yellow head virus (YHV) have caused mortalities in cultured shrimp throughout Asia. By 1995, WSSV was detected in Texas and South Carolina, and the virus has also been recently reported in Central and South America (Nicaragua, Honduras, Guatemala, Panama, Colombia, Peru, and Ecuador). The importation of live infected shrimp is the principal

S. V. Durand; K. F. J. Tang; D. V. Lightner

2000-01-01

379

Effect of cryogenic freezing on salmonella and listeria recovery from inoculated shrimp  

Technology Transfer Automated Retrieval System (TEKTRAN)

In the United States, shrimp is number one in seafood consumption. Shrimp is usually imported frozen, and the Food and Drug Administration has isolated Salmonella spp. from this frozen product. This research was conducted to determine the effect of two cryogenic freezing protocols (time and tempe...

380

Probabilities of low nighttime temperatures during stocking and harvest seasons for inland shrimp culture  

Technology Transfer Automated Retrieval System (TEKTRAN)

Technical Abstract: The pacific white shrimp (Litopenaeus vannamei) is cultured in earthen ponds at inland sites across the southern US. The growing season in ponds is limited to periods when water temperatures permit shrimp survival and growth. Low nighttime air temperatures associated with cold f...

381

Foreign Fishery Developments may have also affected 1984 pond pro-Ecuadorean Shrimp  

E-print Network

Foreign Fishery Developments may have also affected 1984 pond pro- duction. Ecuadorean Shrimp the world's leading producer of farmed shrimp. Investors in Ecuador continued to build ponds in 1984 24,000 hectares of new ponds in 1984 (Table 2). Although complete statistical data was not available

382

Characterization of the Taura syndrome virus isolate originating from the 2004 Texas Epizootic in cultured shrimp  

Technology Transfer Automated Retrieval System (TEKTRAN)

Taura syndrome virus (TSV) is a major viral pathogen of penaeid shrimp worldwide. A comprehensive investigation of the Texas isolate of TSV that caused epizootics in shrimp farms in Texas in 2004 (Us04Pv1) revealed that the virus was highly virulent in laboratory bioassays causing severe symptom dev...

383

75 FR 56988 - Certain Frozen Warmwater Shrimp From the People's Republic of China: Extension of Preliminary...  

Federal Register 2010, 2011, 2012, 2013, 2014

...is extending the time limit for the preliminary...administrative review of certain frozen warmwater shrimp from...anniversary month. Extension of Time Limit for Preliminary...administrative review on certain frozen warmwater shrimp from the PRC within the original time limit because the...

2010-09-17

384

ULTRASTRUCTURAL STUDY OF LESIONS IN GILLS OF A MARINE SHRIMP EXPOSED TO CADMIUM  

EPA Science Inventory

Pathologic black gills of pink shrimp, Penaeus duorarum, exposed to 763 micrograms/l of cadmium chloride for 15 days were studied with transmission electron microscopy and were compared with normal gills of control pink shrimp. Local as well as extensive areas of cell death and n...

385

Onboard processing of deepwater pink shrimp ( Parapenaeus longirostris ) with liquid ice: Effect on quality  

Microsoft Academic Search

This study investigated the effect on the quality of deepwater pink shrimp (Parapenaeus longirostris) of onboard chilling with liquid ice versus the traditional chilling with flaked ice. Quality was estimated by physical, chemical, microbiological and sensory parameters after 24 h and 4 days of chilled storage. Application of liquid ice immediately after catch for the fast chilling of pink shrimp

Almudena Huidobro; María Elvira López-Caballero; Rogério Mendes

2002-01-01

386

FISH PREDATION ON JUVENILE BROWN SHRIMp, PENAEUS AZTECUS IVES: EFFECTS OF TURBIDITY AND  

E-print Network

FISH PREDATION ON JUVENILE BROWN SHRIMp, PENAEUS AZTECUS IVES: EFFECTS OF TURBIDITY AND SUBSTRATUM for burrowing. Regardless of the type of substratum, turbid water increased predation by southern flounder clear and turbid water, the presence of sand, whic1l allowed shrimp to burrow, decreased predation

387

Brine Shrimp Lethality Activity of Thai Medicinal Plants in the Family Meliaceae  

Microsoft Academic Search

Brine shrimp larvae have been used as a bioassay for a variety of toxic substances. The method has also been applied to plant extracts in order to facilitate the isolation of biologically active compounds. In this study, the plants in the family Meliaceae have been selected to test for brine shrimp lethality activity based on taxonomic approach including Azedirachta indica,

Sirintorn Pisutthanana; Pinyupa Plianbangchang

388

A comparison between two brine shrimp assays to detect in vitro cytotoxicity in marine natural products  

Microsoft Academic Search

BACKGROUND: The brine shrimp lethality assay is considered a useful tool for preliminary assessment of toxicity. It has also been suggested for screening pharmacological activities in plant extracts. However, we think that it is necessary to evaluate the suitability of the brine shrimp methods before they are used as a general bio-assay to test natural marine products for pharmacological activity.

José Luis Carballo; Zaira L Hernández-Inda; Pilar Pérez; María D García-Grávalos

2002-01-01

389

Feeding biology of the shrimp Rimicaris exoculata at hydrothermal vents on the Mid-Atlantic Ridge  

Microsoft Academic Search

A newly described species of shrimp, Rimicaris exoculata Williams and Rona, 1986, dominates the megafaunal community at two hydrothermal vent sites on the Mid-Atlantic Ridge. Behavioral observations and gut-content analyses indicate, that these shrimp ingest large amounts of sulfide particles from black smoker chimneys. We found no evidence for chemoautotrophic endosymbionts in R. exoculata, based on analyses of morphology, stable

C. L. Dover; B. Fry; J. F. Grassle; S. Humphris; P. A. Rona

1988-01-01

390

Process optimization for extraction of carotenoids from shrimp waste with vegetable oils  

Microsoft Academic Search

Shrimp waste is an important source of natural carotenoid. Studies were carried out to determine the extraction yield of shrimp waste carotenoids in different vegetable oils. Highest yield was obtained by extraction using refined sunflower oil compared to groundnut oil, gingelly oil, mustard oil, soy oil, coconut oil and rice bran oil. The extraction yield of carotenoids in sunflower oil

N. M. Sachindra; N. S. Mahendrakar

2005-01-01

391

MODELING THE RELATIONSHIP BETWEEN SHRIMP MARICULTURE AND WATER QUALITY IN THE RIO CHONE ESTUARY, ECUADOR  

EPA Science Inventory

The Rio Chone estuary in Ecuador has been heavily altered by the conversion of over 90% of the original mangrove forest to shrimp ponds. We carried out computational experiments using both hydrodynamic and shrimp pond models to investigate factors leading to declines in estuarine...

392

White spot syndrome virus epizootic in cultured Pacific white shrimp Litopenaeus vannamei (Boone) in Taiwan.  

PubMed

White spot syndrome virus (WSSV) has caused significant losses in shrimp farms worldwide. Between 2004 and 2006, Pacific white shrimp Litopenaeus vannamei (Boone) were collected from 220 farms in Taiwan to determine the prevalence and impact of WSSV infection on the shrimp farm industry. Polymerase chain reaction (PCR) analysis detected WSSV in shrimp from 26% of farms. Juvenile shrimp farms had the highest infection levels (38%; 19/50 farms) and brooder shrimp farms had the lowest (5%; one of 20 farms). The average extent of infection at each farm was as follows for WSSV-positive farms: post-larvae farms, 71%; juvenile farms, 61%; subadult farms, 62%; adult farms, 49%; and brooder farms, 40%. Characteristic white spots, hypertrophied nuclei and basophilic viral inclusion bodies were found in the epithelia of gills and tail fans, appendages, cephalothorax and hepatopancreas, and virions of WSSV were observed. Of shrimp that had WSSV lesions, 100% had lesions on the cephalothorax, 96% in gills and tail fans, 91% on appendages and 17% in the hepatopancreas. WSSV was also detected in copepoda and crustaceans from the shrimp farms. Sequence comparison using the pms146 gene fragment of WSSV showed that isolates from the farms had 99.7-100% nucleotide sequence identity with four strains in the GenBank database--China (AF332093), Taiwan (AF440570 and U50923) and Thailand (AF369029). This is the first broad study of WSSV infection in L. vannamei in Taiwan. PMID:24111694

Cheng, L; Lin, W-H; Wang, P-C; Tsai, M-A; Hsu, J-P; Chen, S-C

2013-12-01

393

Effects of a Fixed-Crest Weir on Brown Shrimp Penaeus aztecus Growth, Mortality, and Emigration in a Louisiana Coastal Marsh  

Microsoft Academic Search

We investigated the effects of water-control weirs on growth, emigration, and mortality of brown shrimp. Juvenile brown shrimp were captured, marked, and released in two shallowwater marsh ponds. One pond had a weir at its only exit. All surviving marked brown shrimp were recaptured as they emigrated from each pond. Shrimp remained in the weired pond 12–18 d longer after

E. Eric Knudsen; Ronald F. Paille; Barton D. Rogers; William H. Herke; James P. Geaghan

1989-01-01

394

A multi-biomarker approach to assess the impact of farming systems on black tiger shrimp (Penaeus monodon).  

PubMed

This study examined the advantages of the use of biomarkers as an early warning system by applying it to different shrimp farming systems in Soctrang and Camau provinces, main shrimp producers in Mekong River Delta, Vietnam. Shrimp were collected at 15 different farms divided into four different farming systems: three farms were converted from originally rice paddies into intensive shrimp farming systems (IS1, IS2, IS3); three farms were rice-shrimp integrated farming systems (RS4, RS5, RS6); three farms were intensive farming systems (IS7, IS8, IS9); six farms were extensive shrimp farming systems (From ES1 to ES6). Lipid peroxidation (LPO) and total glutathione (GSH) were measured as well as catalase (CAT), glutathione peroxidase (GPX), glutathione S-transferase (GST) and acetylcholinesterase activities (ACHE). Organ specificity was observed between gills and hepatopancreas with generally higher activity of GST in gills (GSTG) whereas the contrary was observed for LPO level in gills (LPOG). Hierarchical clustering and principal component analysis clearly indicated that shrimp reared in extensive culture system formed a distinct group from those reared in intensive or rice-shrimp integrated systems. CAT in gills (CATG), GPX in gills (GPXG) and hepatopancreas (GPXHP) and ACHE in muscle (ACHEM) of shrimp collected in extensive farms showed a general higher level than those in intensively farmed shrimp. On the contrary, we observed clear high levels of GSTG and GST in hepatopancreas (GSTHP) and LPOG and hepatopancreas (LPOHP) of shrimp sampled in intensive and rice-shrimp integrated systems. Thus, we propose that LPO and CAT, GPX, GST and ACHE can be used as a set of biomarkers for the assessment of health condition and can discriminate between shrimp cultivated in different farming systems. These findings provide the usefulness of integrating a set of biomarkers to define the health status of shrimp in different shrimp culture systems. PMID:20943254

Tu, Huynh Thi; Silvestre, Frederic; Wang, Neil; Thome, Jean-Pierre; Phuong, Nguyen Thanh; Kestemont, Patrick

2010-11-01

395

Predation by dipteran larvae on fairy shrimp (Crustacea: Anostraca) in Utah rock pools  

USGS Publications Warehouse

A series of experiments examined how ecological factors affect notonectid foraging success on fairy shrimp. Variation in pond depth over natural ranges had no direct effect on notonectid ability to capture fairy shrimp. Decreases in water clarity over natural ranges led to decreased notonectid ability to capture fairy shrimp. This corresponds with the observation that six weeks after the fairy shrimp hatched they were more likely to be present in cloudy ponds than in ponds containing clearer water. If correct, this is a situation where physical factors have a major effect on how a biological interaction influences the local distribution of species. It appears water depth indirectly affects notonectid foraging rates, as shallow ponds are apparently made cloudy by wind-driven waves disturbing the bottom mud. These results suggest the notonectid-fairy shrimp interaction will not be a constant for any given pond, but will depend on abiotic factors like amount of rainfall and frequency of windy conditions.

Graham, T.B.

1994-01-01

396

Influence of ultrasonic treatment on the allergenic properties of Shrimp ( Penaeus vannamei) Allergen  

NASA Astrophysics Data System (ADS)

The present study was undertaken to determine whether high intensity ultrasound could reduce the allergic properties of shrimp allergens. Reducing the allergenic properties of these allergens will be beneficial to allergic individuals. Samples of shrimp protein extract and shrimp muscle were treated by high-intensity ultrasound with water bathing at 0°C or 50°C for different time periods. The treated and untreated samples were then analyzed by SDS-PAGE, Western blots and competitive inhibition ELISA (Ci-ELISA) to determine the shrimp allergenicity. The results show that high-intensity ultrasound has no effect on allergenicity when the extracts were treated at 0°C. However, a significant decrease was observed in the level of the major shrimp allergen, Pen a 1, when the samples were treated at 50°C. In the determination of allergenicity with Ci-ELISA, a reduction in IgE binding was also observed.

Zhenxing, Li; Hong, Lin; Limin, Cao

2006-04-01

397

A study of the incidence of Vibrio parahaemolyticus in Malaysian shrimp undergoing processing for export.  

PubMed Central

The incidence of Vibrio parahaemolyticus in products of the Malaysian export shrimp processing industry was investigated through the stages from the catch to that of the cooked, peeled and frozen product. The organism was commonly found in freshly caught and landed shrimp, and could be detected by enrichment culture at all stages of processing. The number of V. parahaemolyticus in shrimp varied from nil to 4x10(4), and 19 of the 50 serotypes in the current antigenic scheme were found, O1-K38 and O1-K32 occurring most often. All the isolates were Kanagawa-negative; one strain was a sucrose-positive variant. The study indicated that specifications of 10(2) g-1 for V. parahaemolyticus in raw tropical shellfish are too stringent but that the Malaysian shrimp industry should be able to meet this requirement for cooked shrimp. PMID:7310127

Cann, D. C.; Taylor, L. Y.; Merican, Z.

1981-01-01

398

Effect of peach gum polysaccharides on quality changes of white shrimp.  

PubMed

Peach gum polysaccharides (PGPs) have both antibacterial and antioxidant activities. In this study, the retardation effect of the PGPs on the quality changes of white shrimp (Penaeus vannamei) during refrigerated storage was investigated. Shrimp samples were untreated with different concentrations of the PGPs solution and then they were stored under refrigerated conditions for 10 days. During refrigerated storage, shrimp samples were taken periodically and their total viable count, pH value, total volatile basic nitrogen, and overall acceptability score were evaluated. Compared to the control, treatment of the PGPs solution effectively retarded bacterial growth and pH changes, reduced total volatile basic nitrogen, and increased overall acceptability score of white shrimp (P. vannamei) during refrigerated storage. The results indicate that treatment of PGPs could be a promising means to preserve white shrimp (P. vannamei). PMID:25450827

Yao, Xing-Cun; Chang, Cheng-Fei; Wu, Sheng-Jun

2015-01-01

399

Immune response and disease resistance of shrimp fed biofloc grown on different carbon sources.  

PubMed

The objective of this study was to document the immunological effects of growing shrimp in biofloc systems. The experiment consisted of four types of biofloc systems in which bioflocs were produced by daily supplementation of four different carbon sources, i.e. molasses, tapioca, tapioca-by-product, and rice bran, at an estimated C/N ratio of 15 and a control system without any organic carbon addition. Each biofloc system was stocked with Pacific white shrimp (Litopenaeus vannamei) juveniles that were reared for 49 days. The use of tapioca-by-product resulted in a higher survival (93%) of the shrimp as compared to the other carbon sources and the control. The highest yield and protein assimilation was observed when tapioca was used as the carbon source. After 49 days, phenoloxidase (PO) activity of the shrimp grown in all biofloc systems was higher than that of the shrimp from the control system. Following a challenge test by injection with infectious myonecrosis virus (IMNV), the levels of PO and respiratory burst (RB) activity in the shrimp of all biofloc treatments were higher than that of the challenged shrimp from the control treatment. An increased immunity was also suggested by the survival of the challenged shrimp from the experimental biofloc groups that was significantly higher as compared to the challenged shrimp from the control treatment, regardless of the organic carbon source used to grow the bioflocs. Overall, this study demonstrated that the application of biofloc technology may contribute to the robustness of cultured shrimp by immunostimulation and that this effect is independent of the type of carbon source used to grow the flocs. PMID:25218685

Ekasari, Julie; Hanif Azhar, Muhammad; Surawidjaja, Enang H; Nuryati, Sri; De Schryver, Peter; Bossier, Peter

2014-12-01

400

[Exploitation of the shrimp trawl fishery in the period 1991-1999 at the Gulf of Nicoya, Costa Rica].  

PubMed

In Costa Rica, the Gulf of Nicoya shrimp fishery originated in 1952 and represented one of the most important economic activities in the region. Nevertheless, overfishery reduced the captured volumes to levels that prevent this commercial activity. I analyzed official fishery statistics between 1991 and 1999. These species involved are: two species of white shrimp, (Litopenaeus occidentalis and L. stylirostris), the "titi" shrimp (Xiphopenaeus riveti), the brown shrimp (Farfantepenaeus californiensis), the "pinki" shrimp (F. brevirostris) and the "fidel" shrimp (Solenocera agassizi). All the species reached the Maximum Sustainable Yield in the decades of 1970 and 1980 and are now found at over-exploitation levels. I recommend that this shrimp trawl fishery be completely closed down. PMID:18457129

Tabash Blanco, Farid A

2007-03-01

401

Isotopic Incorporation Rates and Discrimination Factors in Mantis Shrimp Crustaceans  

PubMed Central

Stable isotope analysis has provided insights into the trophic ecology of a wide diversity of animals. Knowledge about isotopic incorporation rates and isotopic discrimination between the consumer and its diet for different tissue types is essential for interpreting stable isotope data, but these parameters remain understudied in many animal taxa and particularly in aquatic invertebrates. We performed a 292-day diet shift experiment on 92 individuals of the predatory mantis shrimp, Neogonodactylus bredini, to quantify carbon and nitrogen incorporation rates and isotope discrimination factors in muscle and hemolymph tissues. Average isotopic discrimination factors between mantis shrimp muscle and the new diet were 3.0 ± 0.6 ‰ and 0.9 ± 0.3 ‰ for carbon and nitrogen, respectively, which is contrary to what is seen in many other animals (e.g. C and N discrimination is generally 0–1 ‰ and 3–4 ‰, respectively). Surprisingly, the average residence time of nitrogen in hemolymph (28.9 ± 8.3 days) was over 8 times longer than that of carbon (3.4 ± 1.4 days). In muscle, the average residence times of carbon and nitrogen were of the same magnitude (89.3 ± 44.4 and 72.8 ± 18.8 days, respectively). We compared the mantis shrimps’ incorporation rates, along with rates from four other invertebrate taxa from the literature, to those predicted by an allometric equation relating carbon incorporation rate to body mass that was developed for teleost fishes and sharks. The rate of carbon incorporation into muscle was consistent with rates predicted by this equation. Our findings provide new insight into isotopic discrimination factors and incorporation rates in invertebrates with the former showing a different trend than what is commonly observed in other animals. PMID:25835953

deVries, Maya S.; del Rio, Carlos Martínez; Tunstall, Tate S.; Dawson, Todd E.

2015-01-01

402

Transmission of white spot syndrome virus (WSSV) from Dendronereis spp. (Peters) (Nereididae) to penaeid shrimp.  

PubMed

Dendronereis spp. (Peters) (Nereididae) is a common polychaete in shrimp ponds built on intertidal land and is natural food for shrimp in traditionally managed ponds in Indonesia. White spot syndrome virus (WSSV), an important viral pathogen of the shrimp, can replicate in this polychaete (Desrina et al. 2013); therefore, it is a potential propagative vector for virus transmission. The major aim of this study was to determine whether WSSV can be transmitted from naturally infected Dendronereis spp. to specific pathogen-free (SPF) Pacific white shrimp Litopenaeus vannamei (Boone) through feeding. WSSV was detected in naturally infected Dendronereis spp. and Penaeus monodon Fabricius from a traditional shrimp pond, and the positive animals were used in the current experiment. WSSV-infected Dendronereis spp. and P. monodon in a pond had a point prevalence of 90% and 80%, respectively, as measured by PCR. WSSV was detected in the head, gills, blood and mid-body of Dendronereis spp. WSSV from naturally infected Dendronereis spp was transmitted to SPF L. vannamei and subsequently from this shrimp to new naïve-SPF L. vannamei to cause transient infection. Our findings support the contention that Dendronereis spp, upon feeding, can be a source of WSSV infection of shrimp in ponds. PMID:24716813

Haryadi, D; Verreth, J A J; Verdegem, M C J; Vlak, J M

2015-05-01

403

Purification and partial characterization of the plasma clotting protein from the pink shrimp Farfantepenaeus paulensis.  

PubMed

A clotting protein (CP) was purified from the plasma of the pink shrimp Farfantepenaeus paulensis by sequential anion-exchange chromatography. The shrimp CP was able to form stable clots in vitro in the presence of hemocyte lysate and Ca2+, suggesting that the clotting reaction is catalyzed by a Ca2+-dependent transglutaminase present in shrimp hemocytes. Dansylcadaverine was incorporated into the shrimp CP in the presence of endogenous transglutaminase (hemocyte lysate), confirming that the shrimp purified CP is the substrate for the transglutaminase enzyme. The molecular mass of the CP was determined by gel filtration to be 341 kDa and 170 kDa by SDS-PAGE under reducing conditions. These results suggest that the shrimp CP consists of two identical subunits, covalently linked by disulphide bonds. The amino acid sequence at the N-terminus was 100% identical to that of the penaeids Litopenaeus vannamei and Penaeus monodon and 66% to 80% identical to the CPs of other decapods. This is the first report of a CP characterization in an Atlantic penaeid species. Further studies, including a molecular cloning approach would enable to detect which tissues express the gene of the clotting protein. It would be also useful to understand the mechanism by which the coagulation time is delayed in shrimps under stress conditions. PMID:16153866

Perazzolo, Luciane M; Lorenzini, Daniel M; Daffre, Sirlei; Barracco, Margherita A

2005-11-01

404

Molecular cloning and characterisation of prophenoloxidase from haemocytes of the white shrimp, Litopenaeus vannamei.  

PubMed

cDNA encoding prophenoloxidase (proPO) of the white shrimp Litopenaeus vannamei was obtained from haemocytes by a reverse-transcription polymerase chain reaction (RT-PCR) and rapid amplification of cDNA using oligonucleotide primers based on the proPO sequence of tiger shrimp Penaeus monodon, freshwater crayfish Pacifastacus leniusculus, green tiger shrimp Penaeus semisulcatus (accession no.: AF521949) and kuruma shrimp Marsupenaeus japonicus (accession no.: AB0733223). proPO of L. vannamei was constitutively expressed. The 2471-bp cDNA contained an open reading frame (ORF) of 2058 bp, a 96-bp 5'-untranslated region, and a 317-bp 3'-untranslated region containing the poly A tail. The molecular mass of the deduced amino acid sequence (686 amino acids) was 78.1 kDa with an estimated pI of 6.02. It contained putative copper binding sites, a complement-like motif (GCGWPQHM), a proteolytic activation site, and a conserved C-terminal region common to all known proPOs. However, no signal peptide sequence was detected in white shrimp proPO. Comparison of amino acid sequences showed that white shrimp proPO is more closely related to the proPO of another penaeid than to that of a freshwater crayfish. White shrimp proPO mRNA was synthesized in haemocytes and not in the hepatopancreas or muscle. The activation responses of the proPO of the white shrimp to an exogenous protease (trypsin), a detergent (sodium dodecyl sulphate), and algal and microbial cell wall components (laminarin, sodium alginate, zymosan, and lipopolysaccharide), and its susceptibility to protease inhibitors in vitro resemble the proPO activation system of other crustaceans. These facts suggest that the proPO system in haemocytes of the white shrimp Litopenaeus vannamei serves an important function in non-self recognition and host immune reactions. PMID:15683918

Lai, Ching-Yi; Cheng, Winton; Kuo, Ching-Ming

2005-05-01

405

Risk assessment of heavy metal contamination in shrimp farming in Mai Po Nature Reserve, Hong Kong.  

PubMed

An ecological survey was carried out to determine the sediment concentrations of nutrients and heavy metals and bioaccumulation of heavy metals in fish and shrimp including tilapia (Oreochromis mossambicus x O. nilotica), grey mullet (Mugil cephalus), gei wai shrimp (Metapenaeus ensis) and caridean shrimp (Macrobrachium nipponensis) in the traditional tidal shrimp ponds (gei wais) of Mai Po Nature Reserve, Hong Kong. The sediments collected from the landward sites contained higher nutrient contents, as well as zinc (Zn), chromium (Cr), copper (Cu), nickel (Ni) and cadmium (Cd) than those collected from the seaward sites, but vice versa for lead (Pb) and mercury (Hg). However, the concentrations of all metals were exceptionally high in the two sites located outside the reserve, suggesting that waters from Deep Bay might be the possible source of metal contamination affecting the reserve. All metals studied seemed to accumulate in the viscera of fish. Body size was the determining factor for the accumulation of heavy metals in caridean shrimp and gei wai shrimp but not fish. Concentrations of the metals studied in tissues of grey mullet and gei wai shrimp were found to be safe for human consumption. Concentrations of Cr in tilapia whole body (0.68-1.10 mg kg(-1) wet weight) were close to or over the guideline value of 1 mg kg(-1) set by the Food Adulteration (Metallic Contamination) Regulations of Hong Kong. Tilapia flesh and small caridean shrimp collected from gei wais were contaminated by Cr and Pb but still fit for human consumption. Caution is required if large caridean shrimp is to be consumed in large amounts continuously because the concentration of Pb exceeded the maximum permitted concentration (6 mg kg(-1)). The rather high Cr concentrations in tilapia whole body should not be overlooked as the fish will serve as a food source for migratory birds visiting the site. PMID:16528597

Cheung, K C; Wong, M H

2006-01-01

406

Characterization of Intestinal Bacteria in Wild and Domesticated Adult Black Tiger Shrimp (Penaeus monodon)  

PubMed Central

The black tiger shrimp (Penaeus monodon) is a marine crustacean of economic importance in the world market. To ensure sustainability of the shrimp industry, production capacity and disease outbreak prevention must be improved. Understanding healthy microbial balance inside the shrimp intestine can provide an initial step toward better farming practice and probiotic applications. In this study, we employed a barcode pyrosequencing analysis of V3-4 regions of 16S rRNA genes to examine intestinal bacteria communities in wild-caught and domesticated P. monodon broodstock. Shrimp faeces were removed from intestines prior to further analysis in attempt to identify mucosal bacterial population. Five phyla, Actinobacteria, Fusobacteria, Proteobacteria, Firmicutes and Bacteroidetes, were found in all shrimp from both wild and domesticated environments. The operational taxonomic unit (OTU) was assigned at 97% sequence identity, and our pyrosequencing results identified 18 OTUs commonly found in both groups. Sequences of the shared OTUs were similar to bacteria in three phyla, namely i) Proteobacteria (Vibrio, Photobacterium, Novosphingobium, Pseudomonas, Sphingomonas and Undibacterium), ii) Firmicutes (Fusibacter), and iii) Bacteroidetes (Cloacibacterium). The shared bacterial members in P. monodon from two different habitats provide evidence that the internal environments within the host shrimp also exerts selective pressure on bacterial members. Intestinal bacterial profiles were compared using denaturing gradient gel electrophoresis (DGGE). The sequences from DGGE bands were similar to those of Vibrio and Photobacterium in all shrimp, consistent with pyrosequencing results. This work provides the first comprehensive report on bacterial populations in the intestine of adult black tiger shrimp and reveals some similar bacterial members between the intestine of wild-caught and domesticated shrimp. PMID:24618668

Rungrassamee, Wanilada; Klanchui, Amornpan; Maibunkaew, Sawarot; Chaiyapechara, Sage; Jiravanichpaisal, Pikul; Karoonuthaisiri, Nitsara

2014-01-01

407

Status of selected bottomfish and crustacean species in Prince William Sound following the Exxon Valdez oil spill  

SciTech Connect

Exposure and possible adverse effects of the Exxon Valdez oil spill (EVOS) at depth were studied between 1989 and 1991 on several species of crustaceans, molluscs, and finfish that are characterized by ontogenetic shifts in distribution from meroplanktonic larvae to benthic and demersal juveniles and adults. The authors approach was to search for (1) evidence of exposure to Exxon Valdez crude oil (EVC) at depth (generally between 20 to 150 m) and (2) measurable perturbations at both the individual and population levels. Primary species targeted were Tanner crab (Chionoecetes bairdi), several pandalid shrimps (Pandalus platyceros, P. hypsinotus, P. borealis), flathead sole (Hippoglossoides elassodon), and several bivalves including scallops (Chlamys rubida) and infaunal clams (Nuculana, Yoldia, and Macoma spp.). The survey design provided a comparison between variables measured in oiled bays around Knight Island and non-oiled bays at other locations within Prince William Sound. Polycyclic aromatic hydrocarbons (PAHs) of petrogenic origin were measured in all bays sampled in this study and levels of PAHs derived from EVC were elevated in the oiled bays following the spill, yet attenuated to less than 200 ng/g sediment by 1991. 95 refs., 22 figs., 6 tabs.

Armstrong, D.A.; Dinnel, P.A.; Orensanz, J.M. [Univ. of Washington, Seattle, WA (United States). School of Fisheries] [and others

1995-12-31

408

The quality and safety of shrimp sold by roadside vendors in Texas  

E-print Network

and adenosine monophosphate deaminase durzng ice storage of pink and brown shrimp from the Gulf of Mexico. J. Food Sci. 44:1625-1628. 2. Cobb, B. F. III, I. Alaniz, and C. Thompson, Jr. , 1973. Biochemica1. and microbial studies on shrimp: Volatile nitrogen.... Better methods in handling, storage and sanitation will improve the public health and freshness quality of both roadside and store- bought shrimp. 19 REFERENCES 1. Cheuk, W. L. , G. Finne, and R. Nickelson II, 1979. Stability of adenosine diaminase...

Lackey, Patrick A

1980-01-01

409

Effect of chitosan-based edible coating on preservation of white shrimp during partially frozen storage.  

PubMed

Chitosan and chitooligosaccharides are preservatives with proven antibacterial activity, while glutathione has antioxidant activity. This study investigated the effects of chitosan coating combined with chitooligosaccharides and glutathione (0.8% glutathione+1% chitooligosaccharides+1% chitosan) on preservation of white shrimp (Penaeus vannamei) during partially frozen storage. Chitosan-based coating treatments effectively inhibited bacterial growth, reduced total volatile basic nitrogen and malondialdehyde, and basically maintained the sensory properties of white shrimp (P. vannamei) during partially frozen storage. Therefore, chitosan-based edible coating combined with chitooligosaccharides and glutathione could be a promising antimicrobial and oxidant method to prevent metamorphism of white shrimp with extended shelf life. PMID:24491494

Wu, Shengjun

2014-04-01

410

A Brine Shrimp Bioassay for Measuring Toxicity and Remediation of Chemicals  

NASA Astrophysics Data System (ADS)

A bioassay using Artemia franciscana (brine shrimp) was adapted to measure the toxicity of household chemicals. One project is described in which students collect dose-response curves for seven commercial flea-killing products. Next, groups of students researched the insecticidal ingredients of the flea products. On the basis of the structures of the active ingredients, they chose remediation methods to make the flea product less toxic to brine shrimp; procedures included copper-catalyzed hydrolysis, adsorption onto activated charcoal, bleach treatment, and photodegradation. No special equipment or supplies are necessary for the bioassay other than the brine shrimp eggs, which can be obtained at any aquarium store.

Lieberman, Marya

1999-12-01

411

Retention and tissue damage of PSP and NSP toxins in shrimp: Is cultured shrimp a potential vector of toxins to human population?  

PubMed

Toxic microalgae outbreaks have caused significant economic losses in the Mexican aquaculture industry. Blooms that involve PSP and NSP phycotoxins are two of the most dangerous, causing harmful effects to the environment, economy and public health. The exact metabolic mechanism of these toxins in shrimp still remains unknown. Because shrimp consume microalgae their edible tissues are clearly possible vectors for human toxic syndrome. This study examined and verified the toxicological effects for white leg shrimp (Litopenaeus vannamei) exposed to different cell densities of Gymnodinium catenatum and Karenia brevis. Acute assays demonstrated good survival rates of shrimp at low densities of dinoflagellates (10(3) cell/L), while mortality and abnormal behavior were observed with higher densities (>10(4) cell/L). Chronic assays showed significant differences in survival rates, percentage of feed and weight gain of organisms exposed to the dinoflagellates with respect to controls. Furthermore, PSP and NSP toxins were detected in all the edible tissues. Gastric glands and muscle retained toxins for a longer period of time compared to other tissues, even after a depuration period. Histology damages were observed in the heart, gastric gland and brain. This study strongly supports that shrimp represent a potential risk for humans as unconventional vectors of phycotoxins. PMID:19028514

Pérez Linares, Jesús; Ochoa, José Luis; Gago Martínez, Ana

2009-02-01

412

Histopathological Investigations on Rickettsiella-like sp. and Nonoccluded Viruses Infecting the Pecan Weevil Curculio caryae,the Squash Beetle Epilachna borealis,and the Mexican Bean Beetle Epilachna varivestis  

Microsoft Academic Search

Electron microscopic observations of abnormal specimens of pecan weevils,Curculio caryae,squash beetles,Epilachna borealis,and Mexican bean beetles,Epilachna varivestis,obtained from insect-rearing facilities and from field collections revealed that rickettsia-like organisms (RLOs) and viruses caused disease in these species. Several pleomorphic forms of the RLOs which were similar to those ofRickettsiellasp. were found in tissues of the fat body, hypodermis, tracheal matrix, muscle, and

J. R Adams; T. B Clark; G. J Tompkins; W. W Neel; R. F Schroder; P. W Schaefer

1997-01-01

413

HISTOPATHOLOGICAL CHANGES IN GRASS SHRIMP EXPOSED TO CHROMIUM, PENTACHLOROPHENOL AND DITHIOCARBAMATES  

EPA Science Inventory

This report deals with the histopathological/ultrastructural changes in various tissues of grass shrimp (Palaemonetes pugio) exposed to hexavalent chromium, pentachlorophenol (PCP) and two dithiocarbamate formulations: Aquatreat DNM-30 (15% sodium dimethyl dithiocarbamate plus 15...

414

ECONOMIC AND FINANCIAL ANALYSIS OF INCREASING COSTS IN THE GULF SHRIMP FLEETI,2  

E-print Network

-vessel shrimp prices were lower. Thus none of the classes of vessels would have experienced a break-even cash. Manuscript accepted December 1975. FISHERY BULLETIN, VOL. 74, NO.2, 1976. index for lumber, metals

415

Requirements of shrimp, Penaeus chinensis O'sbeck for potassium, sodium, magnesium and iodine  

NASA Astrophysics Data System (ADS)

Potassium, sodium, magnesium and iodine requirements of shrimp, Penaeus chinensis were studied. Orthogonal design was employed in this experiment. The composition of the basal diet consisted of fish meal, peanut cake, corn meal, soybean cake, wheat bran, vitamin mix and mineral mix, and supplementations of potassium, sodium, magnesium and iodine in the basal diet were made according to the L9(34) orthogonal table. The results indicated that iodine supplementation improved growth of the shrimp significantly and raised survival very significantly, iodine requirement of the shrimp was 0.003%; sodium requirement was 0.87% or less; and that 1.1 1.3% potassium and 0.18 0.38% magnesium in the diet were proper nutrition supplements for the shrimp.

Liu, Fa-Yi; Li, He-Fang; Wang, Hui-Liang; Liang, De-Hai; Tian, Yu-Chuan

1995-06-01

416

Seizing a species : the story of the Great Salt Lake brine shrimp harvest  

E-print Network

In the early 1950s, C.C. "Sparkplug" Sanders began harvesting brine shrimp from Utah's Great Salt Lake. Sanders built up a small business selling their eggs, called "cysts, to aquarium stores across the country. During the ...

Wotipka, Samuel Alex

2014-01-01

417

Use of a Brine Shrimp Assay to Study Herbal Teas in the Classroom.  

ERIC Educational Resources Information Center

Introduces a brine shrimp assay to demonstrate the effects of the biological activity of herbal remedies. Describes two protocols, one using aqueous extracts and the other using methanol extracts. (Contains 21 references.) (YDS)

Opler, Annette; Mizell, Rebecca; Robert, Alexander; Cervantes-Cervantes, Miguel; Kincaid, Dwight; Kennelly, Edward J.

2002-01-01

418

Intraspecific relationships among the stygobitic shrimp Typhlatya mitchelli, by analyzing sequence data from mitochondrial DNA  

E-print Network

Intraspecific relationships among the anchialine cave shrimp Typhlatya mitchelli were examined by sequencing a total of 1505 bp from portions of three mitochondrial DNA genes. Cytochrome b, cytochrome oxidase I, and 16S rRNA were partially...

Webb, Michael Scott

2004-09-30

419

Genetic improvement of Pacific white shrimp [Penaeus (Litopenaeus) vannamei]: perspectives for genomic selection  

PubMed Central

The uses of breeding programs for the Pacific white shrimp [Penaeus (Litopenaeus) vannamei] based on mixed linear models with pedigreed data are described. The application of these classic breeding methods yielded continuous progress of great value to increase the profitability of the shrimp industry in several countries. Recent advances in such areas as genomics in shrimp will allow for the development of new breeding programs in the near future that will increase genetic progress. In particular, these novel techniques may help increase disease resistance to specific emerging diseases, which is today a very important component of shrimp breeding programs. Thanks to increased selection accuracy, simulated genetic advance using genomic selection for survival to a disease challenge was up to 2.6 times that of phenotypic sib selection. PMID:25852740

Castillo-Juárez, Héctor; Campos-Montes, Gabriel R.; Caballero-Zamora, Alejandra; Montaldo, Hugo H.

2015-01-01

420

Productivity and Profitability of South Carolina Shrimp Vessels, 1971-75  

E-print Network

, the productivity of conven- tional capital (i.e., nonlabor capital) and human capital (i.e., labor) were estimtated.l that shrimping labor is earning less than its opportunity income. as is new capital investment, hut

421

75 FR 42070 - Certain Frozen Warmwater Shrimp from the People's Republic of China: Partial Rescission of...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Action Committee (``AHSTAC'') is the petitioner in the underlying investigation. The members of AHSTAC are: Nancy Edens; Papa Rod, Inc., Carolina Seafoods; Bosarge Boats, Inc.; Knight's Seafood Inc.; Big Grapes, Inc.; Versaggi Shrimp...

2010-07-20

422

Experimental studies on the bioaccumulation and bioavailability of colloidally-bound trace metals to penaeid shrimp  

E-print Network

in whole shrimp were generally higher for free-ionic forms compared to colloidal forms. However, statistically significant differences in overall rates and extents of uptake were not observed in these experiments. Results indicate that mass specific...

Carvalho, Roberta Anne

1996-01-01

423

78 FR 50389 - Certain Frozen Warmwater Shrimp From Ecuador: Final Affirmative Countervailing Duty Determination  

Federal Register 2010, 2011, 2012, 2013, 2014

...Date: August 19, 2013. FOR FURTHER INFORMATION CONTACT: Joshua Morris and Austin Redington, AD/CVD Operations, Import Administration...Tommy's Seafood; Vincent Piazza & Sons Seafood, Inc.; Wood's Fisheries; Mariah Jade Shrimp Company, LLC; David...

2013-08-19

424

REPRODUCTIVE ALTERATIONS IN ADULT GRASS SHRIMP, PALAEMONETES PUGIO, FOLLOWING SUBLETHAL, CHRONIC ENDOSULFAN EXPOSURE. (R827397)  

EPA Science Inventory

Grass shrimp ( Palaemonetes pugio ) populations exposed to anthropogenic contaminant sources in South Carolina (SC) have reduced densities when compared with populations at SC-reference sites. This laboratory study examined the effects of a commonly used agricultural inse...

425

Abstract--The variability in the supply of pink shrimp (Farfante-  

E-print Network

. Simulation Variability in supply and cross-shelf transport of pink shrimp (Farfantepenaeus duorarum (Farfantepenaeus duorarum) of Dry Tortugas is one of the most economi- cally and ecologically important spe- cies

426

Little Shrimp, Big Results: A Model of an Integrative, Cross-Curricular Activity  

NSDL National Science Digital Library

This integrative, cross-curricular lab engages middle school biology students in an exercise involving ecology, arthropod biology, and mathematics. Students research the anatomy and behavioral patterns of a species of brine shrimp, compare the anatomy of

Carol Piser

2010-12-01

427

78 FR 11221 - Frozen Warmwater Shrimp From China, Ecuador, India, Indonesia, Malaysia, Thailand, and Vietnam  

Federal Register 2010, 2011, 2012, 2013, 2014

...Shrimp From China, Ecuador, India, Indonesia, Malaysia, Thailand, and Vietnam Determination...imports from China, Ecuador, India, Indonesia, Malaysia, Thailand, and Vietnam of...Governments of China, Ecuador, India, Indonesia, Malaysia, Thailand, and...

2013-02-15

428

78 FR 764 - Frozen Warmwater Shrimp From China, Ecuador, India, Indonesia, Malaysia, Thailand, and Vietnam...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Shrimp From China, Ecuador, India, Indonesia, Malaysia, Thailand, and Vietnam...imports from China, Ecuador, India, Indonesia, Malaysia, Thailand, and Vietnam of...Governments of China, Ecuador, India, Indonesia, Malaysia, Thailand, and...

2013-01-04

429

ASPECTS OF BROWN SHRIMP, PENAEUS AZTECUS, GROWTH IN THE NORTHERN GULF OF MEXICO  

E-print Network

-age relationships are appreciably different for each sex in that females are much larger than malesofthe same age annuli on hard parts. Shrimp molt many times during their life cycle; all hard parts are lost

430

78 FR 15686 - Certain Frozen Warmwater Shrimp From Thailand: Preliminary Results of Antidumping Duty...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Department selected for individual examination are Marine Gold Products Limited (Marine Gold), and Thai Union Frozen Products Public Co...shrimp from Thailand produced and exported by Marine Gold. Finally, the Department also preliminarily...

2013-03-12

431

Isolation of indole-producing bacteria from white shrimp (Penaeus setiferus)  

E-print Network

unhindered by bacterial degradation, had reduced the homogenate to Class 4 without the production of detectable indole. The results of this study indicate that the formation of 35 indole ir white shrimp undergoing spoilage is due to bacterial...

Smith, Rodney Lee

1981-01-01

432

Genetic characterization of the burrowing shrimp (Neotrypaea californiensis) in Washington and Oregon estuaries  

EPA Science Inventory

The Ghost shrimp, (Neotrypaea californiensis) are burrowers, which have a wide demographic distribution along the United States Pacific Coast. Our study used genetic analysis to estimate the source populations of larvae recruiting into estuaries to allow a greater understanding ...

433

DISEASES, PARASITES, AND TOXIC RESPONSES OF COMMERCIAL PENAEID SHRIMPS OF THE GULF OF MEXICO  

E-print Network

are a virus, bacteria, fungi, protozoa, hel, minthes, and nematodes. A well·described Baculovirus infects. The ciliate protozoa Zoothamnium sp., Lagenophrys sp., and Parauronema sp. may cause dysfunction in shrimp

434

77 FR 38266 - Sea Turtle Conservation; Shrimp Trawling Requirements; Public Hearing  

Federal Register 2010, 2011, 2012, 2013, 2014

...Atmospheric Administration 50 CFR Part 223 RIN 0648-BC10 Sea Turtle Conservation; Shrimp Trawling Requirements; Public Hearing...and wing nets (butterfly trawls) rigged for fishing to use turtle excluder devices (TEDs) in their nets, which was...

2012-06-27

435

77 FR 37647 - Sea Turtle Conservation; Shrimp Trawling Requirements; Public Hearing Notification  

Federal Register 2010, 2011, 2012, 2013, 2014

...Atmospheric Administration 50 CFR Part 223 RIN 0648-BC10 Sea Turtle Conservation; Shrimp Trawling Requirements; Public Hearing...and wing nets (butterfly trawls) rigged for fishing to use turtle excluder devices (TEDs) in their nets, which was...

2012-06-22

436

50 CFR Figures 19a and 19b to Part... - Chauvin Shrimp Deflector Installation Details  

Code of Federal Regulations, 2012 CFR

50 Wildlife and Fisheries 10 2012-10-01 2012-10-01 false Chauvin Shrimp Deflector Installation Details 19a Figures 19a and 19b to Part 223 Wildlife and Fisheries NATIONAL MARINE FISHERIES SERVICE, NATIONAL...

2012-10-01

437

50 CFR Figures 19a and 19b to Part... - Chauvin Shrimp Deflector Installation Details  

Code of Federal Regulations, 2013 CFR

50 Wildlife and Fisheries 10 2013-10-01 2013-10-01 false Chauvin Shrimp Deflector Installation Details 19a Figures 19a and 19b to Part 223 Wildlife and Fisheries NATIONAL MARINE FISHERIES SERVICE, NATIONAL...

2013-10-01

438

Stage-Specific Cannibalism and Spontaneous Cyst Hatching in the Freshwater Fairy Shrimp Streptocephalus Proboscideus Frauenfeld  

Microsoft Academic Search

Freshwater fairy shrimp that live in episodically filled rainpools are obligate bisexual animals that produce drought-resistant, encapsulated embryos called cysts. A fraction of these hatches upon each inundation, a bet-hedging strategy, and the resulting larvae grow in a concerted manner, forming a cohort. Here, we show that in the Sudan fairy shrimp, Streptocephalus proboscideus, about one-third of the cysts hatches

Henri J. Dumont; A. Jawahar Ali

2004-01-01

439

Effects of environmental salinity and dietary protein levels on digestibility in four species of penaeid shrimp  

E-print Network

EFFECTS OF ENVIRONMENTAL SALINITY AND DIETARY PROTEIN LEVELS ON DIGESTIBILITY IN FOUR SPECIES OF PENAEID SHRIMP A Thesis SILVIO ROMERO DE C ~ COELHO Submitted to the Graduate College of Texas A6M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE December 1984 Major Subject: Wildlife and Fisheries Sciences EFFECTS OF ENVIRONMENTAL SALINITY AND DIETARY PROTEIN LEVELS ON DIGESTIBILITY IN FOUR SPECIES OF PENAEID SHRIMP A Thesis SILVIO ROMERO DE C...

Coelho, Silvio Romero de C.

1984-01-01

440

Effects of a probiotic bacterium on black tiger shrimp Penaeus monodon survival and growth  

Microsoft Academic Search

Bacillus S11 bacterium isolated from black tiger shrimp habitats was added to shrimp feed as a probiotic in three forms: fresh cells, fresh cells in normal saline solution, and a lyophilized form. After a 100-day feeding trial with probiotic supplemented and non-supplemented (control) feeds, Penaeus monodon (from PL30) exhibited no significant difference (p>0.05) in growth, survival nor external appearance between

Sirirat Rengpipat; Wannipa Phianphak; Somkiat Piyatiratitivorakul; Piamsak Menasveta

1998-01-01

441

Effects of temperature and salinity on thermal death in postlarval brown shrimp, Penaeus aztecus  

E-print Network

EFFECTS Ol'- TEMPERATURE AND SALINITY ON THERMAL DEATH IN POSTLARVAL BROWN SHRIMP, Penaeus aztecus A Thesis by LARRY MILTON WIESEPAPE Submitted to the Graduate College of Texas A&M University in partial fulfilln:ent of the requirements... for the degree of MASTER OF SCIENCE August 1970 Major Subject: Wildlife Science EFFECTS OF TEMPERATURE AND SALINITY ON THERMAL DEATH IN POSTIARVAL BROWN SHRIMP, Penaeus aztecus A Thesis by IARRY MILTON WIESEPAPE Approved as to style and content by...

Wiesepape, Larry Milton

1970-01-01

442

Genome-wide discovery of novel and conserved microRNAs in white shrimp (Litopenaeus vannamei).  

PubMed

Of late years, a large amount of conserved and species-specific microRNAs (miRNAs) have been performed on identification from species which are economically important but lack a full genome sequence. In this study, Solexa deep sequencing and cross-species miRNA microarray were used to detect miRNAs in white shrimp. We identified 239 conserved miRNAs, 14 miRNA* sequences and 20 novel miRNAs by bioinformatics analysis from 7,561,406 high-quality reads representing 325,370 distinct sequences. The all 20 novel miRNAs were species-specific in white shrimp and not homologous in other species. Using the conserved miRNAs from the miRBase database as a query set to search for homologs from shrimp expressed sequence tags (ESTs), 32 conserved computationally predicted miRNAs were discovered in shrimp. In addition, using microarray analysis in the shrimp fed with Panax ginseng polysaccharide complex, 151 conserved miRNAs were identified, 18 of which were significant up-expression, while 49 miRNAs were significant down-expression. In particular, qRT-PCR analysis was also performed for nine miRNAs in three shrimp tissues such as muscle, gill and hepatopancreas. Results showed that these miRNAs expression are tissue specific. Combining results of the three methods, we detected 20 novel and 394 conserved miRNAs. Verification with quantitative reverse transcription (qRT-PCR) and Northern blot showed a high confidentiality of data. The study provides the first comprehensive specific miRNA profile of white shrimp, which includes useful information for future investigations into the function of miRNAs in regulation of shrimp development and immunology. PMID:25227525

Xi, Qian-Yun; Xiong, Yuan-Yan; Wang, Yuan-Mei; Cheng, Xiao; Qi, Qi-En; Shu, Gang; Wang, Song-Bo; Wang, Li-Na; Gao, Ping; Zhu, Xiao-Tong; Jiang, Qing-Yan; Zhang, Yong-Liang; Liu, Li

2015-01-01

443

Uptake of lead, cadmium and zinc by the fairy shrimp, Branchinecta longiantenna (Crustacea: Anostraca)  

Microsoft Academic Search

Individuals of the fairy shrimp, Branchinecta longiantenna, were subjected to 5 concentrations (0.1 to 15 mg l-1) of Pb in diluted habitat water at 13 °C. Lead concentrations (mg kg-1 wet weight) in the animals were determined at 2-day intervals by digestion in nitric acid followed by atomic absorption analysis. The shrimp were also subjected to 0.1 mg l-1 media

Alan Mizutani; Eric Ifune; Andrew Zanella; Clyde Eriksen

1991-01-01

444

Toxicity of Selected Chemicals to the Fairy Shrimp, Streptocephalus seali, under Laboratory and Field Conditions  

Microsoft Academic Search

Laboratory toxicity tests were conducted with six chemicals to determine their effect on fairy shrimp (Streptocephalus seali). Formalin (15 and 25 mg\\/1) and Diquat (0.25 to 2.0 mg\\/1) were not toxic to fairy shrimp. Paraquat (0.25 to 2.0 mg\\/1) and benzene hexachloride (0.10 and 0.25 mg\\/1) were moderately toxic. Dylox (0.10 and 0.25 mg\\/1) was highly toxic; mortality exceeded 82%

Jerry L. Moss

1978-01-01

445

Oxygen, carbon, and sulfur cycling in the sediments of hyper-eutrophic mesocosms (shrimp mariculture ponds)  

E-print Network

OXYGEN, CARBON, AND SULFUR CYCLING IN THE SEDIMENTS OF HYPER-EUTROPHIC MESOCOSMS (SHRIMP MARICULTURE PONDS) A Thesis by MATTHEW STEWART ELLIS Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE August 1992 Major Subject: Oceanography OXYGEN, CARBON, AND SULFUR CYCLING IN THE SEDIMENTS OF HYPER-EUTROPHIC MESOCOSMS (SHRIMP MARICULTURE PONDS) A Thesis by MATTHEW STEWART ELLIS Approved as to style...

Ellis, Matthew Stewart

1992-01-01

446

Culturing the fairy shrimp Streptocephalus dichotomus Baird using livestock waste – a reclamation study  

Microsoft Academic Search

The present study describes a defined culturetechnique for the fairy shrimp, Streptocephalusdichotomus. It emphasizes reclamation of low-cost organiclive-stock waste(cow-dung), lime powder, and urea. These compounds wereused to enrich algal and diatom populations in themedium. These algae and diatoms were fed to filter feedingfairy shrimps to yield anostracanbiomass. A production of 262 ± 6 animals l-1was obtained in an experimental tank

N. Munuswamy; A. K. A. Nazar; C. S. Velu; H. J. Dumont

1997-01-01

447

The By-catch From the Artisanal Shrimp Trawl Fishery, Gulf of Paria, Trinidad  

E-print Network

The By-catch From the Artisanal Shrimp Trawl Fishery, Gulf of Paria, Trinidad VISHWANIE MAHARAJ, an estimated yearly average of 200,000,000 kg of demersal finfish by-catch is thought to be discarded ABSTRACT and 97hauls were sampled. Annual ratio estimates were 9 (SD 1.3) finfish:shrimp and 14. 7 (SD 2.0) by-catch

448

Fitness and virulence of an ancestral White Spot Syndrome Virus isolate from shrimp  

Microsoft Academic Search

White Spot Syndrome Virus, the type species of the virus family Nimaviridae, is a large dsDNA virus infecting shrimp and other crustaceans. Genomic analysis of three completely sequenced WSSV isolates identified two major polymorphic loci, “variable region ORF14\\/15” and “variable region ORF23\\/24”. Here, we characterize a WSSV isolate originating from shrimp collected in Thailand in 1996 (TH-96-II). This isolate contains

Hendrik Marks; Josyanne J. A. van Duijse; Douwe Zuidema; Mariëlle C. W. van Hulten; Just M. Vlak

2005-01-01

449

Production and managerial techniques employed at a commercial shrimp farm in South Texas  

E-print Network

). Some revolutionary breakthroughs include the maturation and spawning of many shrimp species, in captivity and general improvements in seed production. Improvement in other areas of shrimp culture, such as nutrition, feeding, and management practices... of elevated header tanks which will then distribute the water to each of the different systems (postlarvae holding tanks, algae culture tanks, larval rearing tanks, maturation tanks, spawning tanks, and quarantine tanks) as seen in Figure 4...

Vizcaino Solares, Jorge Ignacio

1993-01-01

450

An analysis of the impact of alternative import management policies for shrimp  

E-print Network

AN ANALYSIS OF THE IMPACT OF ALTERNATIVE IMPORT MANAGEMENT POLICIES FOR SHRIMP A Thesis by 3ANE CHADWICK HOPKINS Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE December 1983 Major Subject: Agricultural Economics AN ANALYSIS OF THE IMPACT OF ALTERNATIVE IMPORT MANAGEMENT POLICIES FOR SHRIMP A Thesis JANE CHADWICK HOPKINS approved as to style and content by: John P. Nichols (Chairman of...

Hopkins, Jane Chadwick

1983-01-01

451

Penetration mechanism and distribution gradients of sodium tripolyphosphate in peeled and deveined shrimp  

E-print Network

should not be changed. At these lower levels the treatment should give the same improved product and avoid the unnecessarily high uptake of STp that treatment at the higher levels yields, Thin La er Chromato ra h Thin layer chromatography was used... encountered in determining a consistent rf value for a standard STP solution. Due to these inconsistent results with non-radioactive STP treated shrimp extracts, thin layer chromatography was performed on P 32 treated shrimp that had been in frozen storage...

Tenhet, Vickie Lynn

1979-01-01

452

Antioxidant enzyme activities in Pacific white shrimp ( Litopenaeus vannamei) in response to environmental hypoxia and reoxygenation  

Microsoft Academic Search

Hypoxia–reoxygenation represents a relevant physiological challenge for shrimp culture. The sudden input of oxygen (O2) after environmental hypoxia increases reactive oxygen species (ROS) production in Pacific white shrimp (Litopenaeus vannamei). It has been postulated that a relatively high activity of the main antioxidant enzymes allows several adapted invertebrate species to survive repetitive cycles of hypoxia–reoxygenation by counteracting ROS production and,

Delia Patricia Parrilla-Taylor; Tania Zenteno-Savín

2011-01-01

453

Effects of ghost shrimp on zinc and cadmium in sediments from Tampa Bay, FL  

USGS Publications Warehouse

This study investigated the effects that ghost shrimp have on the distribution of metals in sediment. We measured levels of HNO3-extractable zinc and cadmium in surface sediment, in ghost shrimp burrow walls and in sediment ejected by the ghost shrimp from their burrows, at five sandy intertidal sites in Tampa Bay. Ghost shrimp densities and their rate of sediment ejection were also quantified, as were sediment organic content and silt + clay content. Densities of ghost shrimp (Sergio trilobata and Lepidophthalmus louisianensis) averaged 33/m2 at our sites, and they ejected sediment at an average rate of 28 g/burrow/day. Levels of both Zn and Cd were significantly higher in burrow walls than in surface sediments. Sediment ejected by the shrimp from their burrows had elevated levels of Zn (relative to surface sediments) at one of the sites. Sediment organic content and silt + clay content were higher in burrow-wall sediments than in ejected sediment, which in turn tended to have values above those of surface sediments. Differences in levels of HNO3-extractable Zn and Cd among sediment types may be a consequence of these sediments differing in other physiochemical characteristics, though the differences in metal levels remained statistically significant for some sites after correcting for differences in organic content and silt + clay content. We conclude that the presence of ghost shrimp burrows contributes to spatial heterogeneity of sedimentary metal levels, while the ghost shrimp bioturbation results in a significant flux of metals to the sediment surface and is expected to decrease heterogeneity of metal levels in sedimentary depth profiles.

Klerks, P.L.; Felder, D.L.; Strasser, K.; Swarzenski, P.W.

2007-01-01

454

Toxicity assessment of fumonisins using the brine shrimp ( Artemia salina) bioassay  

Microsoft Academic Search

The Fusarium mycotoxins fumonisin B1 (FB1) (1) and B2 (FB2) (2), their hydrolysed analogues HFB1 (3) and HFB2 (4) and the recently discovered fumonisin derivatives N-palmitoyl-HFB1 (5) and N-carboxymethyl-FB1 (6) were compared for their toxicity in a short term bioassay using brine shrimp (Artemia salina). The brine shrimp were hatched in artificial sea water and exposed to the fumonisins in

M. Hartl; H.-U. Humpf

2000-01-01

455

Brine shrimp toxicity and antiplasmodial activity of five Kenyan medicinal plants  

Microsoft Academic Search

The organic extracts of leaves and roots of five plants used for treating malaria in Central, Nairobi and Rift Valley Provinces, Kenya were tested for brine shrimp lethality and in vitro antiplasmodial activity against chloroquine sensitive and resistant strains of Plasmodium falciparum. Of the plants tested, 60% were toxic to the brine shrimp (LC50<30?g\\/ml) and eight out of ten plant

G. N. Wanyoike; S. C. Chhabra; C. C. Lang’at-Thoruwa; S. A. Omar

2004-01-01

456

Chronic toxicity of arsenic to the Great Salt Lake brine shrimp, Artemia franciscana  

Microsoft Academic Search

We determined the chronic toxicity of arsenic (sodium arsenate) to the Great Salt Lake brine shrimp, Artemia franciscana. Chronic toxicity was determined by measuring the adverse effects of arsenic on brine shrimp growth, survival, and reproduction under intermittent flow-through conditions. The study commenced with <24-h-old nauplii, continued through reproduction of the parental generation, and ended after 28 days of exposure.

Kevin V. Brix; Rick D. Cardwell; William J. Adams

2003-01-01

457

Do omnivorous shrimp influence mayfly nymph life history traits in a tropical island stream?  

PubMed

Interspecific interactions can play an important role in determining habitat selection and resource use between competing species. We examined interactions between an omnivorous shrimp and a grazing mayfly, two co-dominant taxa found in Puerto Rican headwater streams, to assess how predator presence may influence mayfly resource use and instantaneous growth in a tropical rainforest ecosystem. We conducted a series of behavioral and growth experiments to determine the effects of the freshwater shrimp, Xiphocaris elongata, on the growth rate and resource selection of mayfly nymphs in the family Leptophlebiidae. For resource choice assessments, we conducted a series of five day laboratory experiments where mayflies were given access to two resource substrate choices (cobble vs. leaves) in the presence or absence of shrimp. To assess for the effects of shrimp on mayfly fitness, we measured mayfly growth in laboratory aquaria after five days using four treatments (cobble, leaves, cobble + leaves, no resource) in the presence or absence of shrimp. In resource choice experiments, mayflies showed preference for cobble over leaf substrata (p < 0.05) regardless of the presence of shrimps, however, the preference for cobble was significantly greater when shrimp were present in the leaf habitat. In growth experiments, there were no statistical differences in mayfly growth in the presence or absence of shrimp (p = 0.07). However, we measured increased mayfly nymph growth in the absence of predators and when both cobble and leaves were available. Our results suggest that interspecific interactions between these taxa could potentially influence organic matter resource dynamics (e.g., leaf litter processing and export) in Puerto Rican streams. PMID:25189068

Macías, Nicholas A; Colón-Gaud, Checo; Duggins, Jonathan W; Ramírez, Alonso

2014-04-01

458

Visualizing Flow Diagrams in WebSphere Studio Using SHriMP Views (Visualizing Flow Diagrams)  

Microsoft Academic Search

Abstract: This paper describes the integration of an information visualization tool, called SHriMPViews, with IBM WebSphere Studio Application Developer Integration Edition, whichwas developed with Eclipse technology. Although SHriMP was originally developedfor visualizing programs, it is content-independent. We have re-targeted SHriMP forvisualizing flow diagrams. Flow diagrams, as supported by WebSphere Studio ApplicationDeveloper Integration Edition, can be hierarchically composed, thus...

Derek Rayside; Marin Litoiu

459

First record of a parasitic septate gregarines (Apicomplexa: Sporozoea) in the shrimp Peneaus monodon in Sundarbans of West Bengal.  

PubMed

Investigations on the incidence of septate gregarines in shrimp have immense importance because of severe pathogenicity of the parasite. The septate gregarines infect the midgut of shrimp Peneaus monodon and severe infection disturbs the intestinal tissues. Mostly gregarines of the genus Nematopsis have been identified from cultured peneaid shrimp. It has worldwide in distribution. In India, gregarine parasites have so far been reported from penaeid shrimps of Bombay and Kerala. The species which was isolated from the midgut of shrimp Peneaus monodon collected from Kharibari area of Sunderbans. 9 out of 20 i.e. 45% of the randomly sampled hosts were found to be infected with a species of the genus Nematopsis. Different developmental stages including trophozoites, sporadins, and gametocysts of the Nematopsis sp. infecting the shrimp have been isolated. No correlations have been established between incidence of infection and environmental parameters. PMID:21526032

Chakraborti, J; Bandyopadhyay, P K

2010-04-01

460

Effect of stocking density on extensive production of freshwater shrimp in coal mine reclamation ponds  

SciTech Connect

The use of post-mining reclamation ponds for the production of freshwater shrimp was evaluated by examining different stocking densities. Juvenile shrimp (Macrobrachium rosenbergii) averaging 0.5g each were stocked into four existing ponds at Peabody`s Ken Surface Mine at 6,175; 12,350; 18,500; and 24,700/ha (2,500, 5,000, 7,500, and 10,000/acre) on June 1, 1995. Shrimp were fed twice a week for 103 days, with harvest conducted September 13, 1995. Survival averaged 40%, overall. Average individual weight size was inversely related to stocking density ranging from 52 g (8.7 shrimp/lb) at 6,175/ha to 20.3 g (22.7 shrimp/lb) at 18,500/acre. Total production was directly related to stocking density ranging from 97 kg/ha (86 lbs/acre) at low density to 211 kg/ha (188 lbs/acre) at 18,500/ha shrimp acre. The major difficulty was at harvest due to difficulty in draining ponds. Construction of designed culture ponds with gravity drains during reclamation could greatly enhance survival, harvestability, and commercial feasibility.

Tidwell, J.H.; Wynne, F.; Coyle, S.D. [Kentucky State Univ., Frankfort, KY (United States). Aquaculture Research Center; Grey, B. [Peabody Coal Co., Rockport, KY (United States); McGuire, J.

1998-12-31

461

White spot syndrome virus (WSSV) infection in shrimp (Litopenaeus vannamei) exposed to low and high salinity.  

PubMed

White spot syndrome virus (WSSV) has a worldwide distribution and is considered one of the most pathogenic and devastating viruses to the shrimp industry. A few studies have explored the effect of WSSV on shrimp acclimated to low (5 practical salinity units [psu]) or high ([40 psu) salinity conditions. In this work, we analysed the physiological response of WSSV-infected Litopenaeus vannamei juveniles that were acclimated to different salinities (5, 15, 28, 34 and 54 psu). We evaluated the osmotic response and survival of the shrimp at different times after infection (0 to 48 hours), and we followed the expression levels of a viral gene (vp664) in shrimp haemolymph using real-time PCR. Our results indicate that the susceptibility of the shrimp to the virus increased at extreme salinities (5 and 54 psu), with higher survival rates at 15 and 28 psu, which were closer to the iso-osmotic point (24.7 psu, 727.5 mOsmol/kg). Acute exposure to the virus made the haemolymph less hyperosmotic at 5 and 15 psu and less hypo-osmotic at higher salinities ([28 psu). The capacity of white shrimp to osmoregulate, and thus survive, significantly decreased following WSSV infection. According to our results, extreme salinities (5 or 54 psu) are more harmful than seawater. PMID:24658782

Ramos-Carreño, Santiago; Valencia-Yáñez, Ricardo; Correa-Sandoval, Francisco; Ruíz-García, Noé; Díaz-Herrera, Fernando; Giffard-Mena, Ivone

2014-09-01

462

Prevalence and distribution of White Spot Syndrome Virus in cultured shrimp.  

PubMed

White Spot Syndrome Virus (WSSV) is a dsDNA virus causing White Spot Syndrome Disease (WSSD) in shrimp with almost 100% morality rate within 3-10 days. In Bangladesh, WSSD is one of the major impediments of shrimp farming. This study first investigated the prevalence and distribution of WSSV in cultured shrimps of the coastal regions in Bangladesh. A total of 60 shrimp samples, collected from the 25 shrimp farms of different coastal regions (Satkhira, Khulna, Bagerhat and Cox's Bazar), were analysed during 2013-2014 by conventional PCR using VP28 and VP664 gene-specific primers; 39 of 60 samples were found WSSV positive. SYBR green real-time PCR using 71-bp amplicon for VP664 gene correlated well with conventional PCR data. The prevalence rates of WSSV among the collected 60 samples were Satkhira 79%, Khulna 50%, Bagerhat 38% and Cox's Bazar 25%. Sequencing of WSSV-positive PCR amplicons of VP28 showed 99% similarity with WSSV NCBI Ref/Seq Sequences. Molecular analysis of the VP28 gene sequences of WSSV revealed that Bangladeshi strains phylogenetically affiliated to the strains belong to India. This work concluded that WSSV infections are widely distributed in the coastal regions cultured shrimp in Bangladesh. PMID:25402810

Hossain, A; Nandi, S P; Siddique, M A; Sanyal, S K; Sultana, M; Hossain, M A

2015-02-01

463

Recent insights into host-pathogen interaction in white spot syndrome virus infected penaeid shrimp.  

PubMed

Viral disease outbreaks are a major concern impeding the development of the shrimp aquaculture industry. The viral disease due to white spot syndrome virus (WSSV) observed in early 1990s still continues unabated affecting the shrimp farms and cause huge economic loss to the shrimp aquaculture industry. In the absence of effective therapeutics to control WSSV, it is important to understand viral pathogenesis and shrimp response to WSSV at the molecular level. Identification and molecular characterization of WSSV proteins and receptors may facilitate in designing and development of novel therapeutics and antiviral drugs that may inhibit viral replication. Investigations into host-pathogen interactions might give new insights to viral infectivity, tissue tropism and defence mechanism elicited in response to WSSV infection. However, due to the limited information on WSSV gene function and host immune response, the signalling pathways which are associated in shrimp pathogen interaction have also not been elucidated completely. In the present review, the focus is on those shrimp proteins and receptors that are potentially involved in virus infection or in the defence mechanism against WSSV. In addition, the major signalling pathways involved in the innate immune response and the role of apoptosis in host-pathogen interaction is discussed. PMID:24953507

Shekhar, M S; Ponniah, A G

2014-06-23

464

Hematological changes in white spot syndrome virus-infected shrimp, Fenneropenaeus chinensis (Osbeck)  

NASA Astrophysics Data System (ADS)

The pathological changes of hemocytes in the haemolymph and hepatopancreas were examined in experimentally and naturally WSSV (white spot syndrome virus) infected Fenneropenaeus chinensis. The results showed that the pathological manifestations of hemocytes were similar among moribund shrimps infected via injection, feeding and by nature. Firstly, the total hemocyte counts (THCs) in WSSV-infected shrimp were significantly lower than those in healthy shrimp. Secondly, necrotic, broken and disintegrated cells were often observed, and a typical hematolysis was present in the haemolymph smear of WSSV-infected shrimp. Thirdly, necrosis and typical apoptosis of hemocytes were detected with TEM in the peripheral haemolymph of WSSV-infected shrimp. Hyalinocytes and semi-granulocytes with masses of WSSVs in their nuclei often appeared, whereas no granular hemocytes with WSSV were found in the hepatopancreas of moribund infected shrimps. All our results supported that hemocytes were the main target cells of WSSV, and hyalinocytes and semigranular hemocytes seemed to be more favorable for WSSV infection in F. chinensis.

Feng, Shouming; Zhan, Wenbin; Xing, Jing; Li, Jun; Yang, Kai; Wang, Jing

2008-08-01

465

Grass shrimp (Palaemonetes spp.) play a pivotal trophic role in enhancing Ruppia maritima.  

PubMed

Coupled trophic-engineer interactions are potentially important for maintaining habitat function and ecosystem services. As ephemeral submerged aquatic vegetation (SAV), Ruppia maritima has a short well-defined growth-senescence cycle and should benefit from any ecological interaction that enhances its physical condition and longevity. Grass shrimp (Palaemonetes spp.) are abundant facultative grazers of epiphytic algae and conveyors of nutrients in tidal marsh and SAV habitats. Grass shrimp addition consistently enhanced Ruppia biomass and shoot density in a series of three field experiments conducted in Grand Bay National Estuarine Research Reserve, Mississippi, USA. In two experiments, epiphyte grazing by grass shrimp enhanced Ruppia by inhibiting die-back during the mid- and latter stages of the Ruppia life cycle. Despite a nonsignificant epiphyte grazing effect, grass shrimp also enhanced Ruppia during its early growth stage in a third experiment. In that experiment, nutrient addition also significantly increased epiphyte biomass. Grass shrimp may have fostered the early growth of Ruppia through direct deposition of feces to the sediment in the third experiment. Grass shrimp play a pivotal trophic role in the maintenance of Ruppia through context-dependent interactions involving stage of the SAV life cycle, season, and nutrient limitation. PMID:17503590

McCall, Donna Drury; Rakocinski, Chet F

2007-03-01

466

Effects of gamma irradiation on chemical, microbial quality and shelf life of shrimp  

NASA Astrophysics Data System (ADS)

In the present study the combined effect of gamma irradiation (1, 3 and 5 kGy) and storage at two temperatures: refrigeration (+4 °C) and frozen (-18 °C), on the shelf-life extension of fresh shrimp meat was investigated. The study was based on microbiological and physicochemical changes occuring in the shrimp samples. Total volatile base nitrogen values and trimethylamine values for irradiated shrimp samples were significantly lower than non-irradiated samples at both storage temperatures, and the rate of decrease was more pronounced in samples irradiated at the higher dose (p<0.05). Thiobarbituric acid values for irradiated shrimp samples were significantly higher than non-irradiated samples at both storage temperatures (p<0.05). pH values of shrimp samples were affected significantly by both irradiating dose and storage temperatures (p<0.05). Microbial counts for non-irradiated shrimp samples were higher than the respective irradiated samples at both storage temperatures (p<0.05). The results revealed that irradiation at high dose (5 kGy) might enhance lipid oxidation, although the growth of microorganisms and protein oxidation was inhibited.

Hocao?lu, Asl?; Sükrü Demirci, Ahmet; Gümüs, Tuncay; Demirci, Mehmet

2012-12-01

467

Abundance and seasonal migrations of the penaeid shrimp Metapenaeus affinis (H. Milne-Edwards) within Iraqi waters  

Microsoft Academic Search

Migration of Metapenaeus affinis (H. Milne-Edwards) from the Arabian Gulf to nursery grounds in the inland waters of Iraq extends from May\\/June to January\\/February. Shrimp ranging in size from 3–125 mm total length were found in inland waters. In the shallow waters of the Al-Assaflya small-sized shrimp only were caught, while in the Marshes large-sized shrimp were abundant. Maximum numbers

S. D. Salman; M. H. Ali; A. H. Y. Al-AdhubI

1990-01-01

468

Identification of differentially expressed genes in shrimp ( Penaeus stylirostris ) infected with White spot syndrome virus by cDNA microarrays  

Microsoft Academic Search

Summary. White spot syndrome virus (WSSV) is currently the most important viral pathogen infecting penaeid shrimp worldwide. Although considerable progress has been made in characterizing the WSSV genome and developing detection methods, information pertaining to host genes involved in WSSV pathogenesis is limited. We examined the potential of cDNA microarray analysis to study gene expression in WSSV-infected shrimp. Shrimp cDNAs

A. K. Dhar; A. Dettori; M. M. Roux; K. R. Klimpel; B. Read

2003-01-01

469

Peptidomic analysis of Chinese shrimp ( Fenneropenaeus chinensis) hemolymph by magnetic bead-based MALDI-TOF MS  

NASA Astrophysics Data System (ADS)

Peptides in shrimp hemolymph play an important role in the innate immune response. Analysis of hemolymph will help to detect and identify potential novel biomarkers of microbial infection. We used magnetic bead-based purification (ClinProt system) and matrix-assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF MS) to characterize shrimp hemolymph peptides. Shrimp serum and plasma were used as the source of samples for comparative analysis, and it was found that serum was more suitable for shrimp hemolymph peptidomic analysis. To screen potential specific biomarkers in serum of immune-challenged shrimps, we applied magnetic bead-based MALDI-TOF MS to serum samples from 10 immune-challenged and 10 healthy shrimps. The spectra were analyzed using FlexAnalysis 3.0 and ClinProTools 2.1 software. Thirteen peptide peaks significantly different between the two groups were selected as candidate biomarkers of lipopolysaccharide (LPS)-infection. The diagnostic model established by genetic algorithm using five of these peaks was able to discriminate LPS-challenged shrimps from healthy control shrimps with a sensitivity of 90% and a specificity of 100%. Our approach in MALDITOF MS-based peptidomics is a powerful tool for screening bioactive peptides or biomarkers derived from hemolymph, and will help to enable a better understanding of the innate immune response of shrimps.

Wang, Baojie; Liu, Mei; Jiang, Keyong; Zhang, Guofan; Wang, Lei

2013-03-01

470

75 FR 61122 - Certain Frozen Warmwater Shrimp From the Socialist Republic of Vietnam: Amended Final Results of...  

Federal Register 2010, 2011, 2012, 2013, 2014

...shrimp (Penaeus vannemei), banana prawn (Penaeus merguiensis), fleshy prawn (Penaeus chinensis), giant river prawn (Macrobrachium rosenbergii), giant tiger prawn (Penaeus monodon), redspotted [[Page 61123

2010-10-04

471

LINKING HABITAT CHANGE AND NUTRIENT DYNAMICS: COMPARISON OF FOOD WEBS AND NITROGEN FLUXES IN BURROWING SHRIMP- AND OYSTER-DOMINATED HABITATS  

EPA Science Inventory

Endemic thalassinid burrowing shrimps are simultaneously dominant ecosystem engineering species and economic pests within Pacific estuaries. Dense populations of two shrimps (Neotrypaea californiensis and Upogebia pugettensis) commonly occupy >75% of intertidal and shallow subti...

472

Distribution, relative abundance and species composition of shrimp, crabs and fish in the intake area, discharge canal and cooling lake of the Cedar Bayou generating station, Baytown, Texas  

E-print Network

similar function for the discharge canal. Species capable of reproducing in the estuary such as bay anchovy, sea catfish and tidewater silverside are finding the cooling lake favor- able for residency. Grass shrimp are decreasing due to dis- appearance... STUDY AREA AND METHODS RESULTS AND DISCUSSION Hydrological Data Biological Data Relative Abundance Brown Shrimp, P. aztecus White Shrimp, P. setiferus Grass Shrimp, P. puuio Blue Crab, C. sapidus. G lf M h d, B. d t Bay Anchovy, A. mitchilli. d...

St. Clair, Lou Ann

1978-01-01

473

Detoxification mechanisms in shrimp: comparative approach between hydrothermal vent fields and estuarine environments.  

PubMed

Hydrothermal vents are extreme deep-sea habitats that, due to their singular features, still intrigue scientific communities. Swift growth rates and profuse biomass of biological communities can be observed, despite of their inherently unstable physical-chemical and toxic conditions, indicating that organisms inhabiting this environment must be well adapted to these inhospitable conditions. The caridean shrimp, Chorocaris chacei, Mirocaris fortunata and Rimicaris exoculata, together with bathymodiolid mussels, dominate the vent fauna along the Mid-Atlantic Ridge (MAR). Crustacean species are widely used as biological indicators of environmental alterations, since they play a key ecological role as planktivorous grazers, epibenthic scavengers or as prey species. The biological consequences of the hydrothermal metal-rich environment in shrimp species are still largely unknown. Therefore, the aim of this study was the determination of the metal levels (Ag, Cd, Cu, Fe, Mn and Zn), metallothioneins (MT) and lipid peroxidation (LPO) in shrimp species collected in Rainbow, Lucky Strike and Menez-Gwen vent sites, in order to evaluate their different adaptation strategies toward metals when compared with two common coastal shrimp species (Palaemon elegans and Palaemonetes varians) from a fairly unpolluted estuarine system in south Portugal (Ria Formosa). Results show significant differences in metal concentrations, MT levels and lipid peroxidation between vent and coastal shrimp and also between shrimp species from the same site. This indicates that biochemical responses in both vent and coastal shrimp are affected not only by the environmental characteristics but also by inter-specific differences. Nevertheless, these responses apparently grant a successful adaptation for the survival in a metal-extreme environment. PMID:18405963

Gonzalez-Rey, Maria; Serafim, Angela; Company, Rui; Gomes, Tânia; Bebianno, Maria João

2008-07-01

474

Tangential flow ultrafiltration for detection of white spot syndrome virus (WSSV) in shrimp pond water.  

PubMed

Water represents the most important component in the white spot syndrome virus (WSSV) transmission pathway in aquaculture, yet there is very little information. Detection of viruses in water is a challenge, since their counts will often be too low to be detected by available methods such as polymerase chain reaction (PCR). In order to overcome this difficulty, viruses in water have to be concentrated from large volumes of water prior to detection. In this study, a total of 19 water samples from aquaculture ecosystem comprising 3 creeks, 10 shrimp culture ponds, 3 shrimp broodstock tanks and 2 larval rearing tanks of shrimp hatcheries and a sample from a hatchery effluent treatment tank were subjected to concentration of viruses by ultrafiltration (UF) using tangential flow filtration (TFF). Twenty to 100l of water from these sources was concentrated to a final volume of 100mL (200-1000 fold). The efficiency of recovery of WSSV by TFF ranged from 7.5 to 89.61%. WSSV could be successfully detected by PCR in the viral concentrates obtained from water samples of three shrimp culture ponds, one each of the shrimp broodstock tank, larval rearing tank, and the shrimp hatchery effluent treatment tank with WSSV copy numbers ranging from 6 to 157mL(-1) by quantitative real time PCR. The ultrafiltration virus concentration technique enables efficient detection of shrimp viral pathogens in water from aquaculture facilities. It could be used as an important tool to understand the efficacy of biosecurity protocols adopted in the aquaculture facility and to carry out epidemiological investigations of aquatic viral pathogens. PMID:25779823

Alavandi, S V; Ananda Bharathi, R; Satheesh Kumar, S; Dineshkumar, N; Saravanakumar, C; Joseph Sahaya Rajan, J

2015-06-15

475

Resistance to the crayfish plague pathogen, Aphanomyces astaci, in two freshwater shrimps.  

PubMed

Aphanomyces astaci, the causal agent of the crayfish plague, has recently been confirmed to infect also freshwater-inhabiting crabs. We experimentally tested the resistance of freshwater shrimps, another important decapod group inhabiting freshwaters, to this pathogen. We exposed individuals of two Asian shrimp species, Macrobrachium dayanum and Neocaridina davidi, to zoospores of the pathogen strain isolated from Procambarus clarkii, a known A. astaci carrier likely to get into contact with shrimps. The shrimps were kept in separate vessels up to seven weeks; exuviae and randomly chosen individuals were sampled throughout the experiment. Shrimp bodies and exuviae were tested for A. astaci presence by a species-specific quantitative PCR. The results were compared with amounts of A. astaci DNA in an inert substrate to distinguish potential pathogen growth in live specimens from persisting spores or environmental DNA attached to their surface. In contrast to susceptible crayfish Astacus astacus, we did not observe mortality of shrimps. The amount of detected pathogen DNA was decreasing steadily in the inert substrate, but it was still detectable several weeks after zoospore addition, which should be considered in studies relying on molecular detection of A. astaci. Probably due to moulting, the amount of A. astaci DNA was decreasing in N. davidi even faster than in the inert substrate. In contrast, high pathogen DNA levels were detected in some non-moulting individuals of M. dayanum, suggesting that A. astaci growth may be possible in tissues of this species. Further experiments are needed to test for the potential of long-term A. astaci persistence in freshwater shrimp populations. PMID:25064254

Svoboda, J; Mruga?a, A; Kozubíková-Balcarová, E; Kouba, A; Diéguez-Uribeondo, J; Petrusek, A

2014-09-01

476

Photometry and Spectroscopy of ES Aql, SV Sge, and Z UMi, Cool Stars with Variability of the R Coronae Borealis Type  

NASA Astrophysics Data System (ADS)

UBVR c I c photometric measurements are made of three cool stars with R Coronae Borealis type variability, ES Aql, SV Sge, and Z UMi. During their visual light minima ES Aql and Z UMi manifested brightness and color behavior typical of this type of variability: a decrease or increase in the color indices as the brightness decreases and an increase as the normal state is recovered. The molecular spectrum of Z UMi during the second half of the minimum with an weakness by about 4m was already normal, but the Na I D doublet lines were still filled with emission. High resolution profiles of the Na I D lines for SV Sge reveal a systematic shift to -10 km/s and an extended blue wing, which can be regarded as a consequence of a constant outflow of matter from the star's atmosphere that has not led to minima in the visual brightness even over a time of 9 years. Identification of the interstellar Na I D lines in the high resolution spectra has made it possible to verify the known color excess E(B-V) for Z UMi at a level 0m.02 ± 0m.11 and substantially reduce its value to 0m.03 for SV Sge. For the latter star this also opens up the possibility of a substantially lower absolute magnitude, M V ? 2m, than assumed previously.

Rosenbush, A. E.

2013-12-01

477

CNO ABUNDANCES OF HYDROGEN-DEFICIENT CARBON AND R CORONAE BOREALIS STARS: A VIEW OF THE NUCLEOSYNTHESIS IN A WHITE DWARF MERGER  

SciTech Connect

We present high-resolution (R {approx} 50, 000) observations of near-IR transitions of CO and CN of the five known hydrogen-deficient carbon (HdC) stars and four R Coronae Borealis (RCB) stars. We perform an abundance analysis of these stars by using spectrum synthesis and state-of-the-art MARCS model atmospheres for cool hydrogen-deficient stars. Our analysis confirms reports by Clayton and colleagues that those HdC stars exhibiting CO lines in their spectrum and the cool RCB star S Aps are strongly enriched in {sup 18}O (with {sup 16}O/{sup 18}O ratios ranging from 0.3 to 16). Nitrogen and carbon are in the form of {sup 14}N and {sup 12}C, respectively. Elemental abundances for CNO are obtained from C I, C{sub 2}, CN, and CO lines. Difficulties in deriving the carbon abundance are discussed. Abundances of Na from Na I lines and S from S I lines are obtained. Elemental and isotopic CNO abundances suggest that HdC and RCB stars may be related objects, and that they probably formed from a merger of an He white dwarf with a C-O white dwarf.

Garcia-Hernandez, D. A. [Instituto de Astrofisica de Canarias, C/ Via Lactea s/n, 38200 La Laguna (Spain); Hinkle, K. H. [National Optical Astronomy Observatory (NOAO), Tucson, AZ 85726 (United States); Lambert, David L. [W. J. McDonald Observatory, University of Texas at Austin, 1 University Station, C1400. Austin, TX 78712-0259 (United States); Eriksson, K. [Department of Physics and Astronomy, Uppsala University, Box 515, 75120 Uppsala (Sweden)], E-mail: agarcia@iac.es, E-mail: hinkle@noao.edu, E-mail: dll@astro.as.utexas.edu, E-mail: Kjell.Eriksson@astro.uu.se

2009-05-10

478

CNO Abundances of Hydrogen-Deficient Carbon and R Coronae Borealis Stars: A View of the Nucleosynthesis in a White Dwarf Merger  

NASA Astrophysics Data System (ADS)

We present high-resolution (R ~ 50, 000) observations of near-IR transitions of CO and CN of the five known hydrogen-deficient carbon (HdC) stars and four R Coronae Borealis (RCB) stars. We perform an abundance analysis of these stars by using spectrum synthesis and state-of-the-art MARCS model atmospheres for cool hydrogen-deficient stars. Our analysis confirms reports by Clayton and colleagues that those HdC stars exhibiting CO lines in their spectrum and the cool RCB star S Aps are strongly enriched in 18O (with 16O/18O ratios ranging from 0.3 to 16). Nitrogen and carbon are in the form of 14N and 12C, respectively. Elemental abundances for CNO are obtained from C I, C2, CN, and CO lines. Difficulties in deriving the carbon abundance are discussed. Abundances of Na from Na I lines and S from S I lines are obtained. Elemental and isotopic CNO abundances suggest that HdC and RCB stars may be related objects, and that they probably formed from a merger of an He white dwarf with a C-O white dwarf.

García-Hernández, D. A.; Hinkle, K. H.; Lambert, David. L.; Eriksson, K.

2009-05-01

479

The Visual Orbit of the 1.1-day Spectroscopic Binary \\sigma^2 Coronae Borealis from Interferometry at the CHARA Array  

E-print Network

We present an updated spectroscopic orbit and a new visual orbit for the double-lined spectroscopic binary \\sigma^2 Coronae Borealis based on radial velocity measurements at the Oak Ridge Observatory in Harvard, Massachusetts and interferometric visibility measurements at the CHARA Array on Mount Wilson. \\sigma^2 CrB is composed of two Sun-like stars of roughly equal mass in a circularized orbit with a period of 1.14 days. The long baselines of the CHARA Array have allowed us to resolve the visual orbit for this pair, the shortest period binary yet resolved interferometrically, enabling us to determine component masses of 1.137 \\pm 0.037 M_sun and 1.090 \\pm 0.036 M_sun. We have also estimated absolute V-band magnitudes of MV (primary) = 4.35 \\pm 0.02 and MV(secondary) = 4.74 \\pm 0.02. A comparison with stellar evolution models indicates a relatively young age of 1-3 Gyr, consistent with the high Li abundance measured previously. This pair is the central component of a quintuple system, along with another simi...

Raghavan, Deepak; Torres, Guillermo; Latham, David W; Mason, Brian D; Boyajian, Tabetha S; Baines, Ellyn K; Williams, Stephen J; Brummelaar, Theo A ten; Farrington, Chris D; Ridgway, Stephen T; Sturmann, Laszlo; Sturmann, Judit; Turner, Nils H

2008-01-01

480

Putative Promoters Isolated From Infectious Hypodermal and Hematopoietic Necrosis Virus of Shrimp Drive Expression of a Reporter Gene in Bacteria, Insect Cells, Fish Cells, and Shrimp  

Technology Transfer Automated Retrieval System (TEKTRAN)

Infectious hypodermal and hematopoietic necrosis virus (IHHNV) of shrimp contains a linear single-stranded DNA genome of approximately 4.1 kb with three putative open reading frames (ORFs) namely, the left ORF, middle ORF and the right ORF on the same DNA strand. Whereas the left ORF codes for non-s...

481

Effect of ante-mortem hypoxia on the physicochemical and functional properties of white shrimp (Litopenaeus vannamei) muscle stored on ice.  

PubMed

The effect of ante-mortem hypoxia on the physicochemical and functional properties of raw and cooked white shrimp was studied. Hue angle was greater (p???0.05) for stressed raw shrimp compared to control (greener color); whereas a lower angle was detected for cooked stressed shrimp (redder/orange coloration). In addition, hue angle increased (p???0.05) over the ice storage period for control and stressed shrimp (raw and/or cooked). Muscle hardness and shear force showed no differences when comparing control and stressed shrimp (raw and/or cooked). However, during ice storage, shear force increased (p???0.05) by 22% and 9% for control and stressed raw shrimp, respectively; in contrast, shear force and muscle hardness decreased for cooked shrimp (p???0.05). Control showed more (p???0.05) elasticity than stressed cooked shrimp. Stressed raw shrimp showed a water holding capacity 10.8% lower (p???0.05) than control. However, during the storage, water holding capacity increased (p???0.05) reaching similar values to control after day 4. Muscle protein solubility of stressed shrimp was 31% lower than control; however, no differences (p?>?0.05) were observed after the second day. The thermal stability of myosin (T max) showed differences (p???0.05) among control and stressed shrimp, whereas no differences for ?H were observed. Results showed the influence of ante-mortem hypoxia on the physicochemical and functional properties of white shrimp muscle. PMID:23685566

García-Sifuentes, Celia Olivia; Pacheco-Aguilar, Ramón; Scheuren-Acevedo, Susana María; Carvallo-Ruiz, Gisela; Garcia-Sanchez, Guillermina; Gollas-Galván, Teresa; Hernández-López, Jorge

2013-06-01

482

Fairy, tadpole, and clam shrimps (Branchiopoda) in seasonally inundated clay pans in the western Mojave Desert and effect on primary producers  

Microsoft Academic Search

BACKGROUND: Fairy shrimps (Anostraca), tadpole shrimps (Notostraca), clam shrimps (Spinicaudata), algae (primarily filamentous blue-green algae [cyanobacteria]), and suspended organic particulates are dominant food web components of the seasonally inundated pans and playas of the western Mojave Desert in California. We examined the extent to which these branchiopods controlled algal abundance and species composition in clay pans between Rosamond and Rogers

WN Brostoff; JG Holmquist; J Schmidt-Gengenbach; PV Zimba

2010-01-01

483

Biotechnology-Aquaculture Interface: The Site of Maximum Impact Workshop Biosecure Zero-Exchange Systems for Intensive Shrimp Culture: Past Experiences, Biocomplexity Challenges, Future Opportunities  

Microsoft Academic Search

Shrimp farmers have suffered significant economic losses in recent years due to disease problems that have plagued the global shrimp farming industry. To mitigate crop loss, shrimp farmers and researchers are evaluating biosecure production systems designed to minimize the introduction and spread of pathogens and protect coastal resources. A hallmark of these systems is the elimination of water exchange as

Shaun M. Moss

484

Effects of omnivorous shrimp in a montane tropical stream: sediment removal, disturbance of sessile invertebrates and enhancement of understory algal biomass  

Microsoft Academic Search

Freshwater shrimp dominate the faunal biomass of many headwater tropical streams: however, their role in community organization is unclear. Enclosure\\/exclosure experiments in a montane Puerto Rican stream examined direct and indirect effects of two dominant taxa of atyid (Atyidae) shrimp, Atya lanipes Holthuis and Xiphocaris elongata Guerin-Meneville. Both shrimp taxa caused significant reductions in sediment cover on rock substrata, reducing

Catherine M. Pringle; Gail A. Blake; Alan P. Covich; Karen M. Buzby; Amy Finley

1993-01-01

485

Investigations on juvenile fish excluder cum shrimp sorting device (JFE-SSD).  

PubMed

Penaeid shrimp is a major resource in India contributing about 7.4% of the total marine fish landings. They are mostly landed by small mechanized trawlers. Shrimp trawling generates large quantities of bycatch mostly consisting of juvenile fishes, due to use of small mesh size in codends of trawl nets. Juvenile Fish Excluder cum Shrimp Sorting Device (JFE-SSD) is a bycatch reduction device with an in situ sorting mechanism, which replaces the conventional codend in a trawl. The device was designed to catch shrimps and commercially important fish species using a specially designed oval sorting grid with appropriate bar spacing and dual codends. Shrimp sorting efficiency and bycatch exclusion characteristics of JFE-SSD attached to a 29.6 m shrimp trawl, was tested by experimental fishing along the coastal waters off Cochin, India. Out of a total of 317.07 kg of catch encountered in the JFE-SSD installed trawl, 58.22% was retained in lower codend, 17.53% in upper codend and 24.25%, mostly consisting of juveniles and sub-adults of finfishes and shellfishes, was excluded from upper codend. The mean CPUE registered for upper and lower codend were 7.23±1.04 SE and 5.84±0.96 SE kg h(-1) respectively. The CPUE of shrimps retained in upper and lower codends were significantly different (Kruskal-Wallis test (1,62), P<0.001), but the mean CPUE for fishes did not vary significantly. The average escapement of shrimps and juvenile fishes from upper codend were 0.06±0.02 SE kg h(-1) and 2.40±0.44 SE kg h(-1) respectively. Significant differences in the length composition between upper and lower codends were noticed for Megalaspis cordyla, Stolephorus waitei, Metapenaeus dobsoni and Parapenaeopsis stylifera. The experiments demonstrated in situ sorting ability of the device and its potential to reduce the bycatch of juveniles and sub-adults in shrimp trawls. PMID:23875130

Boopendranath, Menothuparambil Ravunny; Pravin, Puthra; Gibinkumar, Therodath Rajan; Sabu, Sarasan; Madhu, Vettiyattil Ramakrishnan

2013-12-01

486

Physical and physiological aspects of gear efficiency in North Sea brown shrimp fisheries  

NASA Astrophysics Data System (ADS)

In search of means to reduce the by-catch of juvenile flatfish in the shrimp fishery, vibrations and changes in current velocity caused by shrimp trawls were investigated in the field and in the laboratory. Buried as well as emerged shrimps ( Crangon crangon) exhibit tailflips 5 10 cm before being touched by the rollers of a shrimp gear approaching them at a speed of 0.5 m·sec-1, as was revealed by slow motion video recordings in aquaria under artificial light. Hence, the signal effective in triggering escape must be attenuated strongly with increasing distance. Sediment vibration, commonly assumed to be an important signal in triggering escape of shrimps, was found to decrease by a factor 100·m-1. Signals from the rollers of a commercial shrimp gear in operation (towing speed 1 m·sec-1) were directly recorded with an accelerometer. Their frequency ranged from 50 to 500 Hz and reached an acceleration of 40 m·sec-2 on soft bottom or up to 100 m·sec-2 on hard substrate. Accelerometers, which had been buried right at the surface of a tidal sand flat during low tide, produced only one sharp signal of 100 Hz with an acceleration of 24 m·sec-2, when a shrimp gear swept them on the submerged tidal flats. However, in aquaria short sinusoidal signals (<5 m·sec-2; 20 to 300 Hz) made buried shrimps and flatfish ( Pleuronectes platessa, Solea solea, Microstomus kitt) hide rather than flee. The vibrations recorded directly at the rollers and the underlying jolting movements of the rollers induce corresponding pulses in the water surrounding the rollers in a layer of approximately 10 15 cm. Similar water displacement of high acceleration was experimentally produced by a spring loaded transparent lucite piston (7 cm in diameter) fitted to an accelerometer. Accelerating this piston (12 116 m·sec-2, 50 200 Hz range) from 5 cm above towards the shrimp produced escape responses in up to 94% of the tests. Arthropods are known to perceive medium displacement rather than pressure. Hence, strong and rapidly rising water currents caused by the rollers rather than sediment vibration are assumed to mainly trigger the escape reaction, which makes Crangon accessible to the gear.

Berghahn, R.; Wiese, K.; Lüdemann, K.

1995-03-01

487

Characterization of a ras-related nuclear protein (Ran protein) up-regulated in shrimp antiviral immunity.  

PubMed

Diseases caused by viruses, especially white spot syndrome virus (WSSV), are the greatest challenge to worldwide shrimp aquaculture. Therefore, the innate immunity of shrimp has attracted extensive attentions these years. To date, however, no mechanism of immuno-related signal transduction pathway has been reported. In this investigation, an important signal transduction factor-Ran gene encoding ras-related nuclear protein (Ran protein) was characterized in shrimp. The shrimp Ran gene, without introns when compared with genomic DNA, was 645 bp in length. The GTP-binding assay showed that the Ran protein had GTP-binding activity. The results of RT-PCR and Western blot indicated that the transcript and protein of Ran were detected in every tissue of shrimp including hepatopancreas, haemolymph, gill, intestine, heart and muscle. In the WSSV-resistant and WSSV-infected shrimp at 4h postinfection, the Ran gene was obviously up-regulated, indicating that it played a role in shrimp immunity against virus infection. This study, therefore, might provide a clue to elucidate shrimp innate immunity. PMID:17703953

Han, Fang; Zhang, Xiaobo

2007-11-01

488

Determination of oxytetracycline residue in shrimp using a portable time-resolved analyzer and HPLC-MS/MS validation  

Technology Transfer Automated Retrieval System (TEKTRAN)

Oxytetracycline (OTC) is the most prominent antibiotic in shrimp aquaculture. In this work, OTC residue in shrimp muscle is determined using a portable analyzer built in this laboratory based on europium-sensitized luminescence (ESL). First, OTC is extracted in McIlvaine buffer at pH 4.0 with 0.1 ...

489

Penaeidins, antimicrobial peptides with chitin-binding activity, are produced and stored in shrimp granulocytes and released after microbial challenge  

Microsoft Academic Search

Penaeidins are members of a new family of antimicrobial peptides isolated from a crustacean, which present both Gram-positive antibacterial and antifungal activities. We have studied the localization of synthesis and storage of penaeidins in the shrimp Penaeus vannamei. The distribution of penaeidin transcripts and peptides in various tissues reveals that penaeidins are constitutively synthesized and stored in the shrimp haemocytes.

Delphine Destoumieux; Marcello Muñoz; Céline Cosseau; Jenny Rodriguez; Philippe Bulet; Michel Comps; Evelyne Bachère

2000-01-01

490

PARTICLE REMOVAL RATES BY THE MUD SHRIMP UPOGEBIA PUGETTENSIS, ITS BURROW, AND A COMMENSAL CLAM: EFFECTS ON ESTUARINE PHYTOPLANKTON ABUNDANCE  

EPA Science Inventory

The burrowing shrimp Upogebia pugettensis is an abundant intertidal inhabitant of Pacific Northwest bays and estuaries where it lives commensally with the bivalve Cryptomya californica. Suspension-feeding activities by the shrimp and by its commensal clam, as well as particle se...

491

On predatory tendencies in the feeding ecology of the fairy shrimp Streptocephalus proboscideus (Frauenfeld, 1873) (Crustacea: Anostraca)  

Microsoft Academic Search

The feeding habits of the filter-feeding fairy shrimp Streptocephalus proboscideus are documented experimentally by offering them ciliates, Volvox, rotifers, nematodes and small crustaceans as prey. Escape capabilities (e.g. swimming speed) rather than size or shape were found to determine these animals' vulnerability to predation by the fairy shrimp. Ingestion rates for Volvox increased hyperbolically with size and, at the high

Johan Mertens; N. Munuswamy; Christine Walsche; Henri J. Dumont

1990-01-01

492

Detection of white-spot syndrome in cultured penaeid shrimp in Asia: Microscopic observation and polymerase chain reaction  

Microsoft Academic Search

Serious disease outbreak caused by a new virus has been occurring among cultured penaeid shrimps in Asian countries since 1993. Typical signs include white spots or patches on the inner surface of the shell and carapace and\\/or reddish coloration of the body. Histopathological changes observed among diseased shrimps collected from various countries exhibited widespread cellular degeneration and severe nuclear hypertrophy

J Kasornchandra; S Boonyaratpalin; T Itami

1998-01-01

493

Biological pumps at the sediment-water interface: Mechanistic evaluation of the alpheid shrimp Alpheus mackayi and its irrigation pattern  

Microsoft Academic Search

Deep-burrowing crustaceans are common on all coasts. In a series of model experiments conducted at the Hawaii Institute of Marine Biology from March to October 1977, the effect of the alpheid shrimp Alpheus mackayi Banner and Banner, on material fluxes across the sediment-water interface has been determined. Viewed as a “biological pump”, the shrimp's irrigation pattern was not random, but

G. Gust; J. T. Harrison

1981-01-01

494

Considerations of diet, stocking density, distribution, population estimation and economics in the pond culture of blue shrimp (Penaeus stylirostris Stimpson)  

E-print Network

shrimp) and July 14 (100 shrimp). Finally, on July 17, a sample of 300 postlarvae were preserved in buffered formalin for future measurements. Postlarvae were measured to the nearest 0. 5 mm from 10 x magnification. On July 17 and 18, postlarvae were...

Hardin, Mark Perry

1981-01-01

495

ASPECTS OF THE HOST - COMMENSAL RELATIONSHIP BETWEEN A PALAEMONID SHRIMP ('PONTONIA DOMESTICA') AND THE PEN SHELL ('ATRINA RIGIDA')  

EPA Science Inventory

Sixty pen shells (Atrina rigida), were collected and examined to determine the prevalence and morphometrics of the commensal shrimp (Pontonia domestica). The spatial and sexual distribution within the shell of the host, and the reproductive states of the shrimp were also investig...

496

75 FR 28235 - Certain Frozen Warmwater Shrimp From the People's Republic of China: Extension of Final Results...  

Federal Register 2010, 2011, 2012, 2013, 2014

...is extending the time limit for the final results...administrative review of certain frozen warmwater shrimp from...period. Extension of Time Limit for Preliminary...administrative review of certain frozen warmwater shrimp from the PRC within the 120 day time limit because the...

2010-05-20

497

76 FR 30100 - Certain Frozen Warmwater Shrimp From the People's Republic of China: Extension of Final Results...  

Federal Register 2010, 2011, 2012, 2013, 2014

...is extending the time limit for the final results...administrative review of certain frozen warmwater shrimp from...period. Extension of Time Limit for Preliminary...administrative review of certain frozen warmwater shrimp from the PRC within the 120 day time limit because the...

2011-05-24

498

Replacement of fish meal with black soldier fly meal in practical diets for Pacific whiteleg shrimp Litopenaeus vannamei  

Technology Transfer Automated Retrieval System (TEKTRAN)

Shrimp account for 15 percent of the total value of internationally traded fishery products, and currently are the largest single aquaculture commodity in value terms. The Pacific whiteleg shrimp (Litopenaeus vannamei) generated USD 11 billion from a production volume of 2.7 million metric tons (mm...

499

Apparent digestibility of dry matter, protein, and essential amino acid in marine feedstuffs for juvenile whiteleg shrimp Litopenaeus vannamei  

Microsoft Academic Search

Apparent protein and amino acid digestibility coefficients of feedstuffs are needed for more accurate, environmentally friendly, and economical feed formulations for shrimp. Coefficients of digestibility of nine feedstuffs of marine origin were measured, in terms of apparent dry matter, protein, and essential amino acid, for juvenile whiteleg shrimp, Litopenaeus vannamei, using 1% chromic oxide as the inert marker. The tested

Martín Terrazas-Fierro; Roberto Civera-Cerecedo; Lilia Ibarra-Martínez; Ernesto Goytortúa-Bores; Margarita Herrera-Andrade; Armando Reyes-Becerra

2010-01-01

500

Effect of temperature on antioxidant enzyme gene expression and stress protein response in white shrimp, Litopenaeus vannamei  

Microsoft Academic Search

The white shrimp Litopenaeus vannamei is one of the most important economic species in shrimp farming and are frequently exposed to multiple stressors (including temperature) in aquaculture. The differential expression of seven genes encoding antioxidant enzymes and stressor biomarkers was investigated by real-time quantitative PCR in haemocytes and hepatopancreas and gill extracted from L. vannamei following acute temperature stress. Temperature

Jun Zhou; Lei Wang; Yu Xin; Wei-Na Wang; Wen-Yin He; An-Li Wang; Yuan Liu

2010-01-01