These are representative sample records from Science.gov related to your search topic.
For comprehensive and current results, perform a real-time search at Science.gov.
1

Phylogeographic Patterns of the Intertidal Isopods Excirolana braziliensis and Excirolana mayana (Isopoda: Cirolanidae)  

E-print Network

sincerest gratitude to Dr. Harilaos Lessios, Dr. Pilar A. Haye, and Dr. Jesser Fidelis de Souza-Filho for providing DNA sequences and/or samples of Excirolana from Panama, Chile and Brazil. I thank my husband and my parents for supporting me throughout... of Panama (Brusca et al. 1995). Excirolana braziliensis is reported to occur along the eastern Pacific from Mexico to Chile and in the western Atlantic from Mexico to Brazil, including the West Indies and the Gulf of Mexico. According to Glynn et al...

Liu, Shuang

2013-04-12

2

Activity rhythms of two cirolanid isopods from an exposed microtidal sandy beach in Uruguay  

Microsoft Academic Search

Activity rhythms of two cirolanid isopods, Excirolana armata and Excirolana braziliensis, were studied based on both seasonal field observations and laboratory experiments, at an exposed microtidal sandy beach\\u000a in Uruguay. The natural emergence patterns of both species were observed in the field for 1?year, twice in each season, and\\u000a correlated to sea level, expected tidal cycles and diel cycles. Laboratory

B. Yannicelli; R. Palacios; L. Giménez

2001-01-01

3

Is Sandy Beach Macrofauna Only Physically Controlled? Role of Substrate and Competition in Isopods  

NASA Astrophysics Data System (ADS)

Exposed sandy beaches have been defined as physically stressful environments, so that benthic populations living there are thought to be regulated mainly by physical factors, biological interactions being minimal. However, recent long-term studies indicate that potential intra- and interspecific interactions should also play a role in structuring populations and communities. This paper evaluates the role of sediment characteristics and potential interactions in determining the abundance and distribution patterns of the cirolanid isopods Excirolana armataand Excirolana braziliensisin sandy beaches of Uruguay. Results from concurrent field sampling and laboratory experiments showed that: (1) at a macroscale (between beaches), E. armataoccurred only in beaches with fine sands, whereas E. braziliensiswas observed in both fine and coarse sand beaches, reaching its highest density in the latter; (2) at a mesoscale (within beaches) and in sympatry (fine sands), both cirolanids showed maximum densities at different tidal heights, with E. braziliensisrestricted to the upper beach levels; (3) both isopods showed a clear preference for fine sands, when tested in isolation or combined; (4) survivorship of E. armatawas higher when tested in the preferred sediment under co-occurrence with E. braziliensis, which in turn presented higher survivorship in coarse sand, either in isolation or combined with E. armata; and (5) individual mean length of both species was consistently higher in allopatry, and similar body lengths were observed in sympatric populations. A geographical analysis of the abundance of E. braziliensisalong Pan-American beaches showed that this isopod is most abundant in fine sands; this overall pattern supports conclusions derived from sediment preference experiments, implicating a greater niche breadth than that observed in Uruguayan beaches. It was concluded that E. armatacould be defined as a high substrate-specific species in which intraspecific interactions would be of utmost importance in population regulation. However, distribution patterns of E. braziliensiscould not be explained by a simple animal-sediment relationship, and correlational evidence suggests that it is displaced by E. armatatowards coarse sands and upper beach levels. Thus, potential biotic interactions cannot be discarded as a structuring force in sandy beach communities.

Defeo, O.; Brazeiro, A.; de Alava, A.; Riestra, G.

1997-10-01

4

Role of suction in sandy beach habitats and the distributions of three amphipod and isopod species  

NASA Astrophysics Data System (ADS)

Sandy beach ecology has progressed rapidly with the emergence of several theories developed on the basis of understanding of hydrodynamic and morphodynamic processes on sandy beach habitats. However, the possible role of dynamic geophysical processes in the sediments remains poorly understood. The present study aims to explore the role of such geophysical processes in the sediments in forming the habitat environment and how they influence the species distributions. We conducted sets of integrated observations and surveys on intertidal and supratidal geophysical environments and the distributions of three amphipod and isopod species at four exposed sandy beaches located on the Japan Sea coast of Niigata Prefecture, Japan. The field results combined with a series of laboratory soil tests demonstrate that suction governed the variability of habitat environments observed, involving the degree of saturation, density, and hardness of the cross-shore intertidal and supratidal sediments, depending on the severity of the suction-dynamics-induced sediment compaction. While the observed species abundances were consistent with existing theories relating to intertidal and supratidal species, the observed magnitudes of suction were responsible for the distribution limits of the amphipods Haustorioides japonicus and Talorchestia brito and the isopod Excirolana chiltoni manifested consistently throughout the different beaches. The results of controlled laboratory experiments and field tests further revealed three distinctive suction-induced mechanisms, associated with their burrowing and physiology and the stability of the burrows. The novel role of such suction-induced geophysical processes in forming the habitat environment and influencing the species distributions may advance our understanding of sandy beach ecology in intertidal and supratidal zones.

Sassa, Shinji; Yang, Soonbo; Watabe, Yoichi; Kajihara, Naoto; Takada, Yoshitake

2014-01-01

5

Biotope and biology of Armadillidium album Dollfuss, a terrestrial isopod of sandy beaches, in the SW Netherlands  

NASA Astrophysics Data System (ADS)

The supralittoral isopod Armadillidium album Dollfus is common, although patchily distributed, under driftwood on the foreshore of broad sandy beaches on the outer coast of the Delta area in the SW Netherlands. The isopods are very tolerant of immersion in seawater, but are nevertheless confined to a narrow zone just above normal spring tides. A. album is a sexually reproducing isopod, with a single well-defined reproductive period in summer and a lifespan of two years. In spite of its very specialized biotope, the life cycle and reproductive strategy of A. album do not deviate substantially from those of related ubiquitous terrestrial isopods.

Vader, Wim; De Wolf, Lein

6

Clock control of foraging in the isopod Scyphax ornatus Dana  

Microsoft Academic Search

The terrestrial sand beach isopod Scyphax ornatus Dana exhibits circadian and circa-semilunar activity rhythms when kept in constant conditions in the laboratory. The circadian rhythm restricts activity to the subjective night and can be synchronised to artificial light cycles. The circa-semilunar rhythm is expressed as a cyclic variation in overall activity level, with isopods alternately active on 6–8 consecutive nights

C. G. Quilter; R. D. Lewis

1989-01-01

7

New species of terrestrial isopods (Isopoda: Oniscidea) from Sardinia  

Microsoft Academic Search

Four new species of terrestrial isopods from Sardinia are described: Alpioniscus thanit sp. nov. (Trichoniscidae), Halophiloscia cristagalli sp. nov. (Halophilosciidae), Alloschizidium maymon sp. nov. and Alloschizidium magrinii sp. nov. (Armadillidiidae). Alpioniscus thanit and Alloschizidium magrinii were collected in endogean environments, Halophiloscia cristagalli on granitic beaches of small islands in the northern and western part of Sardinia, and Alloschizidium maymon from

STEFANO TAITI; ROBERTO ARGANO

8

Heavy water slows biological timing processes  

Microsoft Academic Search

Deuterium oxide lengthens the period of the endogenous tidal activity rhythm of the sand-beach isopod, Excirolana chiltoni. Heavy water has also been shown to retard the circadian rhythm of deer mice, when added to the animals' drinking water. The average dosage dependence of the effect can be estimated with high precision for both isopod and mouse, and the two values

J. T. Enright

1971-01-01

9

Science Shorts: Inquiring About Isopods  

NSDL National Science Digital Library

Isopods, which include favorite backyard critters otherwise known as pill bugs or roly-polies, are intriguing in more ways than one. Not only do isopods easily promote inquiry and help reduce "bug" phobia among students, they also have the distinct advantage of being able to be kept in the classroom in a humane manner while withstanding close observations and handling by young children. A corresponding activity is included with this article.

Adams, Barbara

2006-04-01

10

Consumer strategies of terrestrial gastropods and isopods  

Microsoft Academic Search

Morphological, physiological and ecological evidence is used to show that terrestrial gastropods and isopods, although both can be considered as “primary consumers”, deal quite differently with the vegetabilic matter they use as food. Gastropods are both efficient digesters and assimilators whereas isopods are efficient digesters but usually inefficient assimilators. This combination may require the isopods to turn to coprophagy as

Wolfgang Wieser

1978-01-01

11

Reproduction in the Giant Isopod, Bathynomus giganteus  

Microsoft Academic Search

Aspects of the reproductive biology of the giant isopod, Bathynomus giganteus (Edwards) resemble those of other isopods. In females, the gonopores are located on the sternal midline of the eighth thoracic somite and the eggs are brooded in a marsupium. The reproductive tract of the males also resembles those of other isopods. The paired vasa deferentia open into two penes

NORETTA E. PERRY; GERTRUDE W. HINSCH

1991-01-01

12

Widespread Wolbachia infection in terrestrial isopods and other crustaceans 123 Widespread Wolbachia infection in terrestrial isopods  

E-print Network

Widespread Wolbachia infection in terrestrial isopods and other crustaceans 123 Widespread Wolbachia infection in terrestrial isopods and other crustaceans Richard Cordaux1 , Samuel Pichon1,3 , Houda Wolbachia infection in terrestrial isopods and other crustaceans. In: Strus J, Taiti S, Sfenthourakis S (Eds

Richard, Cordaux,

13

The Beach  

NSDL National Science Digital Library

Have you ever wondered what sand is made of? Where does it come from? How can we keep our beaches clean? Let's work together using the internet to find out a little bit more about the beach. Web Quest Links Introduction Task Resources Evaluation Conclusion Teacher Guide TASK Dear students, Miss Kaysha was at the beach last week and she saw lots of sand. She wants to know how it got there and what it is made of. She also saw ...

2009-04-26

14

Beach Erosion  

NSDL National Science Digital Library

This Why Files article considers beach erosion. Topics covered are: the nature and extent of beach losses, the role of beaches in protecting coasts, some measures -good and bad- to prevent coastal erosion, predicted effects of global warming and sea-level changes on beaches and the impact of melting ice sheets on global ocean volume. Some glaciologists using new calculations, think that instead of possibly collapsing in 100 years, as was considered possible 10 years ago, that the West Antarctic Ice Sheet is more likely to collapse in perhaps 5,000 years at the soonest. Five scientists were interviewed for this article.

Tenenbaum, David

1999-07-22

15

A hydrodynamically modified, abyssal isopod fauna  

NASA Astrophysics Data System (ADS)

At the High Energy Benthic Boundary Layer Experiment (HEBBLE) site (4820 m depth in the western North Atlantic) periods of strong currents and sediment erosion alternate with periods of weak flow and massive deposition. We investigated the impact of this atypical hydrodynamic environment on the isopod fauna by testing for a difference in composition between the HEBBLE site and a tranquil location, the Deep Ocean Mining Environmental Study (DOMES) site A ( ca. 5000 m) in the equatorial Pacific. Epifaunal isopods were significantly less abundant at the HEBBLE site than at the comparison site despite significantly greater total isopod numbers at the HEBBLE site. We suggest that the hydrodynamic regime puts epifaunal isopods at risk, making them rare at the HEBBLE site.

Thistle, David; Wilson, George D. F.

1987-01-01

16

The Toxicity of Zinc to Terrestrial Isopods in a \\  

Microsoft Academic Search

A method is described for assessing the effects of metals on the food consumption rate of isopods from measurements of fecal production. The effects of zinc in the diets of two isopod species, Porcellio scaber and Oniscus asellus, were tested. The metal was fed to the isopods on leaves of field maple (Acer campestre) contaminated with concentrations ranging between 1000

D. Drobne; S. P. Hopkin

1995-01-01

17

Wolbachia Bacteria Effects after Experimental Interspecific Transfers in Terrestrial Isopods  

E-print Network

Wolbachia Bacteria Effects after Experimental Interspecific Transfers in Terrestrial Isopods T of their hosts to increase in frequency in host populations. In terrestrial isopods for example, Wolba- chia in Bandi et al., 2001). In terrestrial isopods particularly, they are responsible for the feminization

18

Natural and artificial rephasing of a tidal rhythm  

Microsoft Academic Search

1.Populations of the sand-beach isopod,Excirolana chiltoni, show rhythmic swimming activity, under non-tidal conditions in the laboratory. The underlying period of this rhythm approximates the double-tidal interval of 24.8 hours rather than the tidal interval of 12.4 hours.2.Three patterns in swimming activity were observed: 1) diurnal activity, in which one peak of activity was observed each day; 2) semidiurnal equal activity,

L. A. Klapow

1972-01-01

19

Isopods Failed to Acclimate Their Thermal Sensitivity of Locomotor Performance during Predictable or Stochastic  

E-print Network

do abrupt changes. To explore this possibility, we exposed terrestrial isopods (Porcellio scaberIsopods Failed to Acclimate Their Thermal Sensitivity of Locomotor Performance during Predictable expectation, thermal treatments did not affect the thermal sensitivity of locomotion; isopods from all

Angilletta, Michael

20

Brood-pouch structures in terrestrial isopods  

Microsoft Academic Search

The brood-pouch (marsupium) of the oniscid isopod species Armadillo officinalis Dumeril 1816 (see Vandel 1955) (Armadillidae), Schizidium tiberianum Verhoeff 1923 (Armadillidiidae), and Porcellio olivieri (Audouin 1825) (Porcellionidae) was examined during their marsupial (breeding) period. In the first two species eggs, embryos and mancas are contained inside sacs which are suspended by a chord from the marsupium roof, whereas in the

M. R. WARBURG; MIRA ROSENBERG

1996-01-01

21

Daytona Beach Activities Schedule  

E-print Network

Highlights · Daytona Beach · Activities Schedule · Birthdays · Manners TheELIWeekly Daytona Beach A day of fun in the sun! WHAT: Come for a day of surf, sun, and sand at world famous Daytona Beach. We will drive to the beach in the morning and spend the day sunning, swimming, and having fun! After the beach

Pilyugin, Sergei S.

22

Daytona Beach Student Voices  

E-print Network

Highlights Daytona Beach Student Voices Birthdays Manners TheELIWeekly Daytona Beach Fun in the sun! Join us for a day of surf, sun, and sand at Daytona Beach. We will drive to the beach in the morning and spend the day sunning, swimming, and having fun! After the beach, we will stop at a restaurant

Pilyugin, Sergei S.

23

On the beach Introduction  

E-print Network

On the beach Onno Bokhove Introduction: Cutting Edge Mathematical Design of Hele-Shaw Beach Beach-Shaw' Beach Evolution by Breaking Waves Onno Bokhove "Mathematics of Computational Science", University of Twente CASA, TU Eindhoven, November 2011 #12;On the beach Onno Bokhove Introduction: Cutting Edge

Al Hanbali, Ahmad

24

Crypsis through disruptive coloration in an isopod  

PubMed Central

The white-spotted colour morph of the marine isopod Idotea baltica appears cryptic on the brown alga Fucus vesiculosus with its white-coloured epizoites Electra crustulenta and Balanus improvisus. This study shows that the crypsis of this coloration is achieved through disruptive coloration rather than through background matching. Crypsis through background matching requires that the sizes and the shapes of the pattern elements should closely resemble those of the visual background. Comparisons between the white spots of the isopods and those of their natural background contradicted this prediction. Disruptive coloration, which aims to obscure the true form of the animal by partly blending with the background and distracting the attention of the viewer from the contour of the animal to unessential patterns, presupposes more marginal elements than expected by the pattern element distribution in the background, and also highly variable and complex elements. Comparison between the observed spot distribution and simulated individuals with randomly distributed spots showed that the spots in these isopods do indeed touch the body outline more often than expected. Furthermore, the spots were highly variable and complex.

Merilaita, S.

1998-01-01

25

Locomotor activity and zonation of upper shore arthropods in a sandy beach of north central Chile  

Microsoft Academic Search

The tenebrionid beetle Phalerisida maculata Kulzer, the talitrid amphipod Orchestoidea tuberculata Nicolet and the oniscid isopod Tylos spinulosus Dana are semi-terrestrial burrowing species, which coexist on sandy beaches of north central Chile (28–30°S). During the night, these scavengers emerge to make downshore migrations. Given the similarity in niches of these three species (all are known to include macroalgal detritus in

E. Jaramillo; H. Contreras; C. Duarte; M. H. Avellanal

2003-01-01

26

Beach profile variation on Hawaiian carbonate beaches  

USGS Publications Warehouse

Beach profiles from selected Oahu and Maui beaches quantitatively document beach volume variation and change between 1994 and 1999. Along exposed, high-energy beaches, large fluctuations in beach volume, characterized primarily by the formation and erosion of extensive berms, dominate the seasonal changes. Beaches along more protected stretches of coastline show much less variation in profile morphology. Beaches on the west (leeward) coast of Oahu experienced the most seasonal variation in profile volume, followed by the north shore, east (windward) shore, and south shore. Similar to Oahu, beaches along the west coast of Maui showed the greatest overall profile variation. However, the mean variation for profiles along a single coastal reach showed little difference compared to other coastal segments. Although some beaches showed net gain or loss during the study period, most beaches remained relatively stable with change limited to a finite envelope. No island-wide trends in beach erosion or accretion were observed during the study period. However, no extreme events, such as tropical storms or hurricanes, directly influenced the Hawaiian Islands during the study period. This data set should therefore be considered as representative of typical annual beach activity. Greater variation and possible long-term change would be expected during extreme events.

Gibbs, A. E.; Richmond, B. M.; Fletcher, C. H.

2000-01-01

27

ISOPOD TRACKWAYS FROM THE CRAYSSAC LAGERSTA TTE, UPPER JURASSIC, FRANCE  

E-print Network

ISOPOD TRACKWAYS FROM THE CRAYSSAC LAGERSTA¨ TTE, UPPER JURASSIC, FRANCE by CHRISTIAN GAILLARD, which occurs abundantly in Late Jurassic deposits of England and France, was probably the trace-maker. Key words: trackways, isopods, intertidal, Tithonian, south- west France. The Upper Jurassic Crayssac

Paris-Sud XI, Université de

28

Towards a characterization of the locomotor activity rhythm of the supralittoral isopod Tylos europaeus.  

PubMed

Freshly collected samples of Tylos europaeus from Korba beach (northeast of Tunisia) were housed in an environmental cabinet at controlled temperature (18°C?±?.5°C) and photoperiod. Locomotor activity was recorded under two photoperiodic regimens by infrared actography every 20?min by multichannel data loggers. One regimen simulated the natural light-dark cycle on the day of collection, whereas the second imposed a state of continuous darkness on all individuals. Under entraining conditions, the animals displayed rhythmic activity, in phase with the period of darkness, whereas in continuous darkness these isopods exhibited a strong endogenous rhythm with circadian and semidiurnal components at mean periods of ? (h:min)?=?25:09?±?01:02?h and ??=?12:32?±?00:26?h, respectively. Under free-running conditions, this endogenous rhythm showed significant intraspecific variability. PMID:22324555

Bohli-Abderrazak, Dhouha; Ayari, Amel; Morgan, Elfed; Nasri-Ammar, Karima

2012-03-01

29

BEACHES HEALTH SURVEY  

EPA Science Inventory

Baterial samples were taken at swimming beaches (primarily freshwater beaches) in Region 10 while evaluating potential bacterial sources (e.g., people, cattle, pets, septic systems, runoff, birds). For each beach selected, the preferred sampling is: background, low/no use period...

30

External microflora of a marine wood-boring isopod.  

PubMed

Bacteria associated with the marine wood-boring isopod Limnoria lignorum were enumerated by acridine orange epifluorescence microscopy and by plate counts on several media; the plate-viable bacteria were isolated and identified. Similar procedures were followed to enumerate and identify bacteria associated with the wood substrate from which the isopods were collected and with the surrounding water from the isopod habitat. Approximately 1.4 x 10 bacterial cells were associated with each individual L. lignorum. Aeromonas hydrophila, Pseudomonas, and Vibrio were the most common genera in the isopod microflora. Wood from L. lignorum burrows had an associated bacterial flora of 1.6 x 10 cells per mg (damp weight). A. hydrophila also predominated in the wood microflora. The water from which the isopod population was collected contained 2.3 x 10 bacteria per ml. Pseudomonas and Vibrio species were very common in the water microflora, but A. hydrophila was not detected. Interactions between the isopod, its associated microorganisms, and the microorganisms within the wood substrate are discussed in the light of the known absence of a resident digestive tract microflora in these animals. PMID:16345871

Boyle, P J; Mitchell, R

1981-10-01

31

Cannibalism and Predation as Paths for Horizontal Passage of Wolbachia between Terrestrial Isopods  

E-print Network

Cannibalism and Predation as Paths for Horizontal Passage of Wolbachia between Terrestrial Isopods) Cannibalism and Predation as Paths for Horizontal Passage of Wolbachia between Terrestrial Isopods. PLoS ONE 8

Paris-Sud XI, Université de

32

Variation in emergence of parasitic and predatory isopods among habitats at Lizard Island, Great Barrier Reef  

Microsoft Academic Search

Gnathiid isopods are one of the most abundant groups of ectoparasites on coral reef fishes. They, and other isopods, have\\u000a been shown to significantly affect the health and behaviour of many reef fish. Whether isopod emergence differs among habitats\\u000a on coral reefs is not known. In this study, we measured emergence rates of parasitic isopods (Gnathiidea and Flabellifera)\\u000a in six

C. M. Jones; A. S. Grutter

2007-01-01

33

Uptake and elimination of benzo[a]pyrene in the terrestrial isopod Porcellio scaber  

Microsoft Academic Search

In isopods from contaminated sites relatively low levels of high molecular weight polycyclic aromatic hydrocarbons (PAHs) have been observed, which may be caused by either a low bioavailability or a high elimination rate. To shed light on this, the uptake and elimination rates of benzo[a]pyrene were estimated for the isopod Porcellio scaber. The isopod was fed contaminated food (100 µg

T. C. van Brummelen; N. M. van Straalen

1996-01-01

34

Global diversification at the harsh sea-land interface: mitochondrial phylogeny of the supralittoral isopod genus Tylos (Tylidae, Oniscidea).  

PubMed

The supralittoral environment, at the transition between sea and land, is characterized by harsh conditions for life. Nonetheless, evolution of terrestrial isopods (Oniscidea), the only group of Crustacea fully adapted to live on land, appears to have involved a transitional step within the supralittoral. The two most basal oniscidean lineages (Ligiidae and Tylidae) have representatives that successfully colonized the supralittoral. One of them is the genus Tylos, which is found exclusively in supralittoral sandy beaches from tropical and subtropical coasts around the world. Comprehensive phylogenetic hypotheses for this genus are lacking, which are necessary for understanding the evolution and biogeography of a lineage that successfully diversified in the harsh sea-land interface. Herein, we studied the phylogenetic relationships among 17 of the 21 currently recognized species of the genus Tylos, based on sequences from four mitochondrial genes (Cytochrome Oxidase I, Cytochrome b, 16S rDNA, and 12S rDNA). Maximum Likelihood and Bayesian phylogenetic analyses identified several lineages with deep divergences and discrete geographic distributions. Phylogenetic and distributional patterns of Tylos provide important clues on the biogeography and evolution of this group. Large divergences among the most basal clades are consistent with ancient splits. Due to the biological characteristics of Tylos, which likely prevent dispersal of these isopods across vast oceanic scales, we argue that tectonic events rather than trans-oceanic dispersal explain the distribution of Tylos in different continents. Overwater dispersal, however, likely enabled range expansions within some basins, and explains the colonization of volcanic oceanic islands. Present-day distributions were also likely influenced by sea level and climate changes. High levels of allopatric cryptic genetic differentiation are observed in different regions of the world, implying that the dispersal abilities of Tylos isopods are more limited than previously thought. Our results indicate that a taxonomic revision of this group is necessary. PMID:24736501

Hurtado, Luis A; Lee, Eun J; Mateos, Mariana; Taiti, Stefano

2014-01-01

35

Daytona Beach Fall 2012 Dates  

E-print Network

Highlights Daytona Beach Fall 2012 Dates Birthdays Manners TheELIWeekly Daytona Beach Fun in the sun! Join us for a day of surf, sun, and sand at Daytona Beach. We will be going to the beach to Gainesville around 10:30pm. Transportation: Bus passes for Daytona Beach are now sold out! If you bought

Pilyugin, Sergei S.

36

Widespread Wolbachia infection in terrestrial isopods and other crustaceans.  

PubMed

Wolbachia bacteria are obligate intracellular alpha-Proteobacteria of arthropods and nematodes. Although widespread among isopod crustaceans, they have seldom been found in non-isopod crustacean species. Here, we report Wolbachia infection in fourteen new crustacean species. Our results extend the range of Wolbachia infections in terrestrial isopods and amphipods (class Malacostraca). We report the occurrence of two different Wolbachia strains in two host species (a terrestrial isopod and an amphipod). Moreover, the discovery of Wolbachia in the goose barnacle Lepas anatifera (subclass Thecostraca) establishes Wolbachia infection in class Maxillopoda. The new bacterial strains are closely related to B-supergroup Wolbachia strains previously reported from crustacean hosts. Our results suggest that Wolbachia infection may be much more widespread in crustaceans than previously thought. The presence of related Wolbachia strains in highly divergent crustacean hosts suggests that Wolbachia endosymbionts can naturally adapt to a wide range of crustacean hosts. Given the ability of isopod Wolbachia strains to induce feminization of genetic males or cytoplasmic incompatibility, we speculate that manipulation of crustacean-borne Wolbachia bacteria might represent potential tools for controlling crustacean species of commercial interest and crustacean or insect disease vectors. PMID:22536103

Cordaux, Richard; Pichon, Samuel; Hatira, Houda Ben Afia; Doublet, Vincent; Grève, Pierre; Marcadé, Isabelle; Braquart-Varnier, Christine; Souty-Grosset, Catherine; Charfi-Cheikhrouha, Faouzia; Bouchon, Didier

2012-01-01

37

Widespread Wolbachia infection in terrestrial isopods and other crustaceans  

PubMed Central

Abstract Wolbachia bacteria are obligate intracellular alpha-Proteobacteria of arthropods and nematodes. Although widespread among isopod crustaceans, they have seldom been found in non-isopod crustacean species. Here, we report Wolbachia infection in fourteen new crustacean species. Our results extend the range of Wolbachia infections in terrestrial isopods and amphipods (class Malacostraca). We report the occurrence of two different Wolbachia strains in two host species (a terrestrial isopod and an amphipod). Moreover, the discovery of Wolbachia in the goose barnacle Lepas anatifera (subclass Thecostraca) establishes Wolbachia infection in class Maxillopoda. The new bacterial strains are closely related to B-supergroup Wolbachia strains previously reported from crustacean hosts. Our results suggest that Wolbachia infection may be much more widespread in crustaceans than previously thought. The presence of related Wolbachia strains in highly divergent crustacean hosts suggests that Wolbachia endosymbionts can naturally adapt to a wide range of crustacean hosts. Given the ability of isopod Wolbachia strains to induce feminization of genetic males or cytoplasmic incompatibility, we speculate that manipulation of crustacean-borne Wolbachia bacteria might represent potential tools for controlling crustacean species of commercial interest and crustacean or insect disease vectors. PMID:22536103

Cordaux, Richard; Pichon, Samuel; Hatira, Houda Ben Afia; Doublet, Vincent; Greve, Pierre; Marcade, Isabelle; Braquart-Varnier, Christine; Souty-Grosset, Catherine; Charfi-Cheikhrouha, Faouzia; Bouchon, Didier

2012-01-01

38

The trophic significance of the invasive seaweed Sargassum muticum in sandy beaches  

NASA Astrophysics Data System (ADS)

Native and exotic seaweeds frequently lie on the beach and sustain part of the benthic food web. However, the role of exotic seaweeds as food sources for beach consumers has been poorly studied. We studied the temporal and spatial variability in the trophic significance of the invasive brown seaweed Sargassum muticum on sandy beaches. We measured the stable isotopes ( ?13C and ?15N) in the tissues of S. muticum and of invertebrate consumers and estimated the dietary biomass proportion of S. muticum during four sampling dates at two beaches and heights on the shore. Samples were collected from eight pitfall traps placed at a distance of 2 m from each other. Detrital macroalgae and seagrasses were also collected by hand within an area of 30 cm around each pitfall trap. We measured the spatial and temporal variability in the isotope composition of the beach consumers and of S. muticum using different models of analyses of variance. We then calculated the biomass proportion of S. muticum to the animal diet with a two-isotopic mixing model. The invasive alga S. muticum seemed to be one of the main food sources for the amphipod Talitrus saltator and, to a less extent, for the isopod Tylos europaeus. The importance of S. muticum was however temporally variable and decreased during spring (in March and May), probably due to the availability of native macrophytes. The supply of invasive wrack to beach food webs thus deserves more attention if we want to understand their role in influencing food web dynamics.

Rossi, Francesca; Olabarria, Celia; Incera, Mónica; Garrido, Josefina

2010-01-01

39

Wolbachia Bacteria Effects after Experimental Interspecific Transfers in Terrestrial Isopods  

Microsoft Academic Search

Wolbachia bacteria are intracellular parasites, vertically transmitted from mothers to offspring through the cytoplasm of the eggs. They manipulate the reproduction of their hosts to increase in frequency in host populations. In terrestrial isopods for example, Wolbachia are responsible for the full feminization of putative males, therefore increasing the proportion of females, the sex by which they are transmitted. Vertical

T. Rigaud; P. S. Pennings; P. Juchault

2001-01-01

40

Terrestrial isopods: useful biological indicators of urban metal pollution  

Microsoft Academic Search

Environmental pollution by toxic metals is widespread in urban areas. In contrast to many industrialized sites, however, metal pollution in most urban regions occurs at low or moderately elevated levels. Reliable criteria of environmental quality have therefore to be established, with the consequence that there is an increasing need for sensitive monitoring of pollution. In this present study, the isopod

Reinhard Dallinger; Burkhard Berger; Stefan Birkel

1992-01-01

41

Experience influences settling behaviour in desert isopods, Hemilepistus reaumuri  

Microsoft Academic Search

Habitat quality, and the levels of habitat variables that are associated with good habitat, can vary between years. Therefore, animals that are able to adjust their habitat selectivity should enjoy higher fitness. I examined the use of experience in habitat selection during natal dispersal in Hemilepistus reaumuri, a monogamous, semelparous desert isopod. Young from the previous year emerge in the

MITCHELL B. BAKER

2005-01-01

42

Thermal stress studies on selected zooplankton species and an isopod  

SciTech Connect

Laboratory determination of temperature stress levels and assessment of their ecological consequences was carried out for selected zooplankton species to develop data for ecological impact associated with industrial use of natural water for cooling. An included literature search revealed substantial fish and benthos data, but little on stress temperature effects on zooplankton. Information was gathered on two cladocerans, four copepods and an isopod.

Bunting, D.L.; Cheper, N.J.

1980-06-01

43

State of the Beach  

NSDL National Science Digital Library

This annual Surfrider Foundation report surveys the state of the beaches in coastal and Great Lakes states that are home to Foundation chapters. Each state is rated based on the availability of information and status of eight indicators, including beach access, Website access, surf zone water quality, and beach erosion, among others. The report is written from the perspective of a "concerned local citizen" and aimed at "the people who use and care most about this precious resource." The online report contains six sections, including an executive summary, an explanation of the indicators, conclusions, and recommendations.

2000-01-01

44

Pyrethroid pesticide effects on behavioral responses of aquatic isopods to danger cues.  

PubMed

The present study sought to evaluate the behavioral responses of non-target organisms in order to determine whether phototactic responses of isopods to danger cues are altered as a function of exposure to the pyrethroid pesticides ?-cyhalothrin and bifenthrin. Experiments conducted on Gnorimosphaeroma oregonensis identified sublethal behavioral responses to pyrethroids, ?-cyhalothrin and bifenthrin at concentrations 0.15 ng/mL, 0.025 ng/mL, and 0.005 ng/mL. Experimental setup tested isopod phototactic responses across six treatments: control, pyrethroid, hemolymph, predator, hemolymph + pyrethroid, and predator + pyrethroid. Isopods exhibited no preference for phototactic responses in the control and pyrethroid treatments. When exposed to danger cues (hemolymph or predator), isopods exhibited significant negative phototaxis, as expected. When exposure to danger cues was combined with pyrethroids, isopods again exhibited no preference for phototactic response. Experiments indicate that pyrethroids diminish isopod's negatively phototactic response to danger cues. PMID:24390114

Huynh, Carolyn K; Poquette, Signe R; Whitlow, W Lindsay

2014-04-01

45

Isopod and limulid marks and trails in Tonganoxie Sandstone (Upper Pennsylvanian) of Kansas  

E-print Network

THE UNIVERSITY OF KANSAS PALEONTOLOGICAL CONTRIBUTIONS June 9, 1967 Paper 19 ISOPOD AND LIMULID MARKS AND TRAILS IN TONGANOXIE SANDSTONE (UPPER PENNSYLVANIAN) OF KANSAS KLAUS BANDEL Geologisch-Paliiontologisches Institut, Rheinische Friedrich... interpreted as being of isopod and limulid origin. Both arthropods are rare as fossils and not known from the Pennsylvanian of Kansas. No trails or tracks of other origin could be recognized. A comparison with Recent environ- ments of limulids and isopods...

Bandel, K.

1967-06-09

46

Hawaii Beach Monitoring Program: Beach Profile Data  

USGS Publications Warehouse

Coastal erosion is widespread and locally severe in Hawaii and other low-latitude areas. Typical erosion rates in Hawaii are in the range of 15 to 30 cm/yr (0.5 to 1 ft/yr; Hwang, 1981; Sea Engineering, Inc., 1988; Makai Ocean Engineering, Inc. and Sea Engineering, Inc.,1991). Recent studies on Oahu (Fletcher et al., 1997; Coyne et al., 1996) have shown that nearly 24%, or 27.5 km (17.1 mi) of an original 115 km (71.6 mi) of sandy shoreline (1940's) has been either significantly narrowed (17.2 km; 10.7 mi) or lost (10.3 km; 6.4 mi). Nearly one-quarter of the islands' beaches have been significantly degraded over the last half-century and all shorelines have been affected to some degree. Oahu shorelines are by far the most studied, however, beach loss has been identified on the other islands as well, with nearly 13 km (8 mi) of beach likely lost due to shoreline hardening on Maui (Makai Engineering, Inc. and Sea Engineering, Inc., 1991). Causes of coastal erosion and beach loss in Hawaii are numerous but, unfortunately, poorly understood and rarely quantified. Construction of shoreline protection structures limits coastal land loss, but does not alleviate beach loss and may actually accelerate the problem by prohibiting sediment deposition in front of the structures. Other factors contributing to beach loss include: a) reduced sediment supply; b) large storms; and, c) sea-level rise. Reduction in sand supply, either from landward or seaward (primarily reef) sources, can have a myriad of causes. Obvious causes such as beach sand mining and emplacement of structures that interrupt natural sediment transport pathways or prevent access to backbeach sand deposits, remove sediment from the active littoral system. More complex issues of sediment supply can be related to reef health and carbonate production which, in turn, may be linked to changes in water quality. Second, the accumulated effect of large storms is to transport sediment beyond the littoral system. Third, rising sea level leads to a natural landward migration of the shoreline. Dramatic examples of coastal erosion, such as houses and roads falling into the sea, are rare in Hawaii, but the impact of erosion is still very serious. The signs of erosion are much more subtle and typically start as a "temporary" hardening structure designed to mitigate an immediate problem which, eventually, results in a proliferation of structures along a stretch of coast. The natural ability of the sandy shoreline to respond to changes in wave climate is lost. The overall goals of this study are to document the coastal erosion history in Hawaii, determine the causal factors of that erosion, provide high-quality data for other "end-users" in applied studies (i.e. coastal engineers, planners, and managers), and increase our general understanding of low-latitude coastal geologic development. This project involves close cooperation between the USGS Coastal and Marine Geology Program and the University of Hawaii.

Gibbs, Ann E.; Richmond, Bruce M.; Fletcher, Charles H.; Hillman, Kindra P.

2001-01-01

47

Virtual Beach: Decision Support Tools for Beach Pathogen Prediction  

EPA Science Inventory

The Virtual Beach Managers Tool (VB) is decision-making software developed to help local beach managers make decisions as to when beaches should be closed due to predicted high levels of water borne pathogens. The tool is being developed under the umbrella of EPA's Advanced Monit...

48

Surface characteristics of isopod digestive gland epithelium studied by SEM  

Microsoft Academic Search

The structure of the digestive gland epithelium of a terrestrial isopod Porcellio scaber has been investigated by conventional scanning electron microscopy (SEM), focused ion beam–scanning electron microscopy (FIB\\/SEM),\\u000a and light microscopy in order to provide evidence on morphology of the gland epithelial surface in animals from a stock culture.\\u000a We investigated the shape of cells, extrusion of lipid droplets, shape

Agron Millaku; Vladka Lešer; Damjana Drobne; Matjaz Godec; Matjaz Torkar; Monika Jenko; Marziale Milani; Francesco Tatti

2010-01-01

49

Vision Index for Isopod Crustacea related to Latitude and Depth  

Microsoft Academic Search

THERE has been no systematic study of the distribution of eye-bearing and blind benthic crustaceans in relation to the depth of the sea at which they occur. It has, however, been known for many years1 that many deep-sea isopods are blind and it has also been known that most intertidal species have well developed eyes2. We have examined the bathymetric

Robert J. Menzies; Robert Y. George; Gilbert Rowe

1968-01-01

50

Size dependent differences in litter consumption of isopods: preliminary results  

PubMed Central

Abstract A series of experiments were applied to test how leaf orientation within microcosms affect consumption rates (Experiment 1), and to discover intra-specific differences in leaf litter consumption (Experiment 2) of the common isopod species Porcellio scaber and Porcellionides pruinosus. A standardised microcosm setup was developed for feeding experiments to maintain standard conditions. A constant amount of freshly fallen black poplar litter was provided to three distinct size class (small, medium, large) of woodlice. We measured litter consumption after a fortnight. We maintained appr. constant isopod biomass for all treatments, and equal densities within each size class. We hypothesized that different size classes differ in their litter consumption, therefore such differences should occur even within populations of the species. We also hypothesized a marked difference in consumption rates for different leaf orientation within microcosms. Our results showed size-specific consumption patterns for Porcellio scaber: small adults showed the highest consumption rates (i.e. litter mass loss / isopod biomass) in high density microcosms, while medium-sized adults of lower densities ate the most litter in containers. Leaf orientation posed no significant effect on litter consumption. PMID:22536112

Vilisics, Ferenc; Szekeres, Sandor; Hornung, Elisabeth

2012-01-01

51

Size dependent differences in litter consumption of isopods: preliminary results.  

PubMed

A series of experiments were applied to test how leaf orientation within microcosms affect consumption rates (Experiment 1), and to discover intra-specific differences in leaf litter consumption (Experiment 2) of the common isopod species Porcellio scaber and Porcellionides pruinosus. A standardised microcosm setup was developed for feeding experiments to maintain standard conditions. A constant amount of freshly fallen black poplar litter was provided to three distinct size class (small, medium, large) of woodlice. We measured litter consumption after a fortnight. We maintained appr. constant isopod biomass for all treatments, and equal densities within each size class. We hypothesized that different size classes differ in their litter consumption, therefore such differences should occur even within populations of the species. We also hypothesized a marked difference in consumption rates for different leaf orientation within microcosms. Our results showed size-specific consumption patterns for Porcellio scaber: small adults showed the highest consumption rates (i.e. litter mass loss / isopod biomass) in high density microcosms, while medium-sized adults of lower densities ate the most litter in containers. Leaf orientation posed no significant effect on litter consumption. PMID:22536112

Vilisics, Ferenc; Szekeres, Sándor; Hornung, Elisabeth

2012-01-01

52

Species-specific patterns of litter processing by terrestrial isopods (Isopoda: Oniscidea) in high intertidal salt marshes and coastal forests  

Microsoft Academic Search

Summary 1. The species-specificity of litter processing by three species of isopods at the interface between salt marsh and coastal forest habitats in the south-eastern United States was examined. 2. To quantify isopod performance, measurements were taken of feeding, digestion and growth of isopods fed on three litter types ( Juncus roemerianus , Quercus virginiana and Pinus palustris ) and

M. Zimmer; S. C. Pennings; T. L. Buck; T. H. Carefoot

2002-01-01

53

Environmental Pollution (Series B) 9 (1985) 239-254 Heavy Metals in Isopods from the Supra-littoral Zone  

E-print Network

of heavy metals were compared in the tissues oiL. oceanica and in two 'more terrestrial' isopods, OniscusEnvironmental Pollution (Series B) 9 (1985) 239-254 Heavy Metals in Isopods from the Supra ABSTRACT The concentrations o]zinc, cadmium, lead and copper in the tissues of the littoral isopod Ligia

Hopkin, Steve

54

Effect of Endosulfan and Parathion on Energy Reserves and Physiological Parameters of the Terrestrial Isopod Porcellio dilatatus  

Microsoft Academic Search

The in vivo effects of parathion and endosulfan on the isopod Porcellio dilatatus were investigated. Feeding parameters (food consumption and assimilation rates), growth, and energy reserves (glycogen, lipid, and protein contents) of pesticide-exposed isopods were compared with those of control animals. Isopods were exposed to a wide range of concentrations of parathion or endosulfan (0.1, 1, 10, 25, 50, 100,

Sónia Ribeiro; J. P. Sousa; A. J. A. Nogueira; A. M. V. M. Soares

2001-01-01

55

Morphodynamics of Prograding Beaches  

NASA Astrophysics Data System (ADS)

Long-term coastal evolution often results from the cumulative effects of small residual differences between relatively large signals. In light of dire projections of sea level rise over the next several decades to century, there is a strong societal need for accurate forecasts of net interannual- to decadal-scale coastal change. However, our present understanding of the processes responsible for storm-induced erosion and coastal recession is significantly more advanced than our knowledge of coastal recovery during calm periods. To investigate the processes and morphodynamics associated with progading beaches we synthesize findings from a long-term (15 years) beach morphology monitoring program in the U.S. Pacific Northwest. Most of the beaches along the Columbia River littoral cell (northwest Oregon and southwest Washington) were eroded during the two intense winters of 1997/1998 (a major El Niño event) and 1998/1999 (a moderate La Niña event). Subsequent to these winters the beaches have exhibited net residual progradation of several meters per year resulting in significant shoreline advance. During this same period as many as two to three new foredunes formed with backshore beach profiles accumulating sand at rates of well over 10 m3/m/yr. Interestingly, these large signals of horizontal and vertical coastal advance have occurred on beaches in which nearshore morphological variability is dominated by net offshore sandbar migration. Net offshore sandbar migration follows a three-stage process; bar generation near the shoreline, seaward migration, and bar degeneration in the outer nearshore with a cyclic return period of approximately 4 to 5 years in the region. Gradients in alongshore sediment transport, net onshore directed cross-shore sediment transport within the surf zone, and cross-shore feeding from a shoreface out of equilibrium with forcing conditions may each be partially responsible for the sediment supplied to the beaches and dunes during the study period. In this paper we will exploit regional variability in physical (e.g. sediment supply) and ecological variables (e.g. % cover of exotic beach grass species and density) thought responsible for the varying rates and form of coastal advance in the region. These gradients allow us to test hypotheses regarding the relative role of the various controls on interannual- to decadal-scale coastal evolution.

Ruggiero, P.

2012-12-01

56

CLASS XI NRLI Beach Management  

E-print Network

SESSION February 2012 06 REPORT BY CLASS XI NRLI Beach Management for Migrating Shore Birds and Human Recreation At the Holiday Inn, Fort Myers Beach, Project Team member Bruce Delaney welcomedthe,emotions,andpeople. this issue Welcome to Ft Myers Beach P.1 Florida Bay P.2 Difficult Dynamics P.3 Fieldtrip to Carlos Pointe P

Florida, University of

57

Transformations of mercury in the terrestrial isopod Porcellio scaber (Crustacea).  

PubMed

The biological cycle of mercury in the terrestrial isopod Porcellio scaber was investigated. Testing the possibility of in vivo Hg(2+) methylation was divided into two methodologically different parts. Firstly, concentrations of total mercury and MeHg in isopods P. scaber and their environment from a Hg-unpolluted area were measured by the use of validated methods (CV AAS, CV AFS). The data obtained show that the percentage of MeHg in leaves, soil and faeces was less than 1%. In contrast, the percentage of MeHg in gut and hepatopancreas was increased to 14 and 77%, respectively, indicating methylation of Hg(2+) in the gut and its further accumulation in glands. To confirm this assumption, the second methodology was applied-a radiotracer technique with 203Hg(2+) of high specific activity. There are few radiotracer techniques for Hg-methylation assays; for our work we chose the method of Czuba et al. which includes alkaline leaching of Hg species, their extraction into dithizone-toluene, followed by specific separation of Hg dithizonates by thin-layer chromatography and gamma counting. All steps of the analytical protocol were checked and optimised by the use of aqueous solutions of 203Hg(2+) and Me(203)Hg(+). The most important finding was that cleaning-up the extract through a florisil column is not appropriate, because the column retains different percentages of Hg(2+) and MeHg(+) and consequently affects the accuracy of the final result. This optimised protocol was then applied to Hg transformation studies in the terrestrial isopod P. scaber. Leaching Hg species from P. scaber fed with 203Hg(2+) or Me(203)Hg(+) dosed food was completely efficient only at elevated temperatures. Preliminary results of methylation/demethlytion studies are rather variable but they show that both processes (Hg(2+)<-->MeHg(+)) take place in the isopod P. scaber. Additionally, an assessment of the mass balance of Hg in isopods P. scaber exposed to 203Hg(2+) indicates that volatile Hg species are also formed. PMID:12663189

Jereb, Vesna; Horvat, Milena; Drobne, Damjana; Pihlar, Boris

2003-03-20

58

Effects of terrestrial isopods on the decomposition of woodland leaf litter  

Microsoft Academic Search

The indirect contribution terrestrial isopods make to decomposition processes by stimulating microbial activites has been quantified in laboratory experiments. The extent to which microbial metabolism is enhanced as a result of the passage of Betula pendula leaf litter through the alimentary system of isopods was measured for both freshly fallen and decayed leaves. Faeces derived from 1 g freshly fallen

M. Hassall; J. G. Turner; M. R. W. Rands

1987-01-01

59

Terrestrial isopods -- a good choice for toxicity testing of pollutants in the terrestrial environment  

Microsoft Academic Search

Terrestrial isopods are suitable invertebrates for testing the relative toxicities of chemicals present in the terrestrial environment. Terrestrial isopods respond in numerous ways to elevated concentrations of chemicals in their food, but only a few of these responses can be used as toxicological endpoints. The most suitable are changes in reproduction, food consumption, moult cycle duration, and structure of the

Damjana Drobne

1997-01-01

60

Detection of Wolbachia (Alphaproteobacteria: rickettsiales) in three species of terrestrial isopods (crustacea: isopoda: oniscidea) in Brazil.  

PubMed

Terrestrial isopods are widely infected with Wolbachia. However, little is known about the presence of bacteria in the Neotropical species. The objective of this study was to test the hypothesis of presence of Wolbachia infection in the native species of terrestrial isopods, Atlantoscia floridana and Circoniscus bezzii, and in the introduced species Burmoniscus meeusei. PMID:24031883

Zimmermann, Bianca Laís; Almerão, Maurício Pereira; Bouchon, Didier; Araujo, Paula Beatriz

2012-04-01

61

The role of coprophagy in the feeding strategies of terrestrial isopods  

Microsoft Academic Search

The hypothesis that faeces recycling in isopods evolved as an adaption to facilitate maintenance of an adequate copper balance in terrestrial environments is examined. Experimental observations on the consumption, absorption and growth rates of Porcellio scaber fed Betula pendula leaf litter varying in copper content and extent of microbial decay are reported. Preventing the isopods from reingesting their faeces caused

Mark Hassall; Stephen P. Rushton

1982-01-01

62

Wolbachia infection in the terrestrial isopod Oniscus asellus: sex ratio distortion and effect on fecundity  

Microsoft Academic Search

Maternally inherited Wolbachia bacteria are widespread in arthropods where they are responsible for various reproductive alterations. In terrestrial isopods (woodlice), Wolbachia may induce feminization or cytoplasmic incompatibility (CI), but their effect remains unknown in most host species. To increase our understanding of host\\/symbiont interactions in terrestrial isopods, the effect of Wolbachia was investigated in the oniscidean Oniscus asellus, mainly to

Thierry Rigaud; Jérôme Moreau; Pierre Juchault

1999-01-01

63

A New Iridovirus of Two Species of Terrestrial Isopods, Armadillidium vulgare and Porcellioscaber  

Microsoft Academic Search

Summary A new iridovirus, herein named isopod iridescent virus (IIV), was isolated from two species of terrestrial isopods in Berkeley, Calif. Infected individuals of Armadillidium vulgare and Porcellio scaber (Crustacea:Isopoda) appeared purple in color; in thin sections, hemocytes, nerve cells, and fat body cells contained cytoplasmic aggregations of virions. Isolated particles, 135 nm in diameter in negative stain, contained DNA

Anabel Cole; Jack Morris

1980-01-01

64

Parasitic isopods (Gnathia sp.) reduce haematocrit in captive blackeye thicklip (Labridae) on the Great  

E-print Network

-meshed hand-net, and placed into moist re-sealable plastic bags. Bagged fi the isopod culture or an identical oval plastic tub without isopods (215 Ã? 150 Ã? 50 cm). Fish were confined for 24 h in rectangular plastic baskets (60 Ã? 40 Ã? 40 cm with 1 cm mesh) covered with shade cloth

Grutter, Alexandra "Lexa"

65

ISOPODS FROM THE ALASKA SALMoN INVESTIGATION. By HARRIET RICHARDSON, Ph. D.,  

E-print Network

ISOPODS FROM THE ALASKA SALMoN INVESTIGATION. By HARRIET RICHARDSON, Ph. D., Collaborator, Smitlzsonialt Institution. 209 B. B. F. 19Q.I-H #12;Blank page retained for pagination #12;211 ISOPODS FROM, densely covered with light brown dots, which form a regular line along the margin of each segment. Surface

66

The Divided Eye of the Isopod Glyptonotus antarcticus: Effects of Unilateral Dark Adaptation and Temperature Elevation  

Microsoft Academic Search

The literature on the structure and function of isopod compound eyes is briefly reviewed. Unlike other isopods studied, Glyptonotus antarcticus possesses physically separated large dorsal compound eyes and small ventral compound eyes. G. antarcticus turns upside down when it swims, and it seems that this is when the ventrally located eyes become useful. Structurally, the two types of eye are

V. B. Meyer-Rochow

1982-01-01

67

Food and habitat choice of the isopod Idotea baltica in the northeastern Baltic Sea  

Microsoft Academic Search

The isopod Idotea baltica is the most important benthic herbivore in the Baltic Sea. There exists a significant correlation between the distribution of the adult isopod and the belts of bladder wrack Fucus vesiculosus. However, following the eutrophication induced blooms of the filamentous macroalga Pilayella littoralis and the disappearance of F. vesiculosus a notable increase in idoteid abundances has been observed.

Helen Orav-Kotta; Jonne Kotta

2004-01-01

68

PREDAnON ON JUVENILE PACIFIC SALMON BY A MARINE ISOPOD  

E-print Network

NOTE PREDAnON ON JUVENILE PACIFIC SALMON BY A MARINE ISOPOD Rocinela bel/ieeps pugettensis (CRUSTACEA, ISOPODA) Observations were made of predation by a ma- rine isopod on both captive and wild the night; a surface light was used to attract the plankton and an airlift pump to draw them into a net

69

Thaumamermis cosgrovei n. gen., n. sp. (Mermithidae: Nematoda) parasitizing terrestrial isopods (Isopoda: Oniscoidea)  

Microsoft Academic Search

Summary  A new mermithid nematode, Thaumamermis cosgrovei n. gen., n. sp. (Mermithidae: Nematoda) was found parasitizing two terrestrial isopods (Isopoda: Oniscoidea) in California. The hosts, Armadillidium vulgare (Latr.) (a pillbug) and Porcellio scaber (Latr.) (a sowbug) represent the first cases of isopods attacked by mermithid nematodes. The genus Thaumamermis can be distinguished from all previously described mermithids by the extremely dimorphic

George O. Poinar

1981-01-01

70

A comparison of test systems for assessing effects of metals on isopod ecological functions.  

PubMed

The effects of metals on the isopod Porcellio scaber and the implication of metal pollution for the functioning of isopods in soil decomposition processes were determined. The experiments were carried out using two test systems, a simple test container without natural substrate and a micro-ecosystem with leaf litter, the latter being more comparable to the field situation. Metals were offered to the isopods by feeding artificially contaminated litter and litter from contaminated field sites. The Cd concentrations in isopods in test containers with ground litter as food were similar to those in isopods in micro-ecosystems with intact leaves as food. Exposure to artificially contaminated litter with Cd alone or litter from contaminated field sites with Cd, Pb, Zn, and Cu resulted in comparable Cd concentrations in the isopods. Growth of the isopods was not affected by Cd or by the combination of Cd, Pb, Zn, and Cu, but differed between the test systems. Fragmentation activity of isopods decreased in litter containing 155 nmol/g Cd and 33500 nmol/g Zn, sampled at a contaminated field site. CO2 production from micro-ecosystems decreased at a concentration of 1010 nmol/g Cd, but NH4 and NO3 concentrations in the litter did not respond to Cd. Isopod growth was better in micro-ecosystems. These systems are therefore recommended for ecotoxicity tests using isopods. After comparison with literature data it was concluded that the bioavailability of Cd in laboratory tests is often higher than the bioavailability in the field at the same total concentrations. This may be due to environmental heterogeneity; this gives animals food choice and is absent in many laboratory test systems. For the quantification of a laboratory-field extrapolation factor for general use, more detailed information is needed than is available now. PMID:1280586

Van Wensem, J; Krijgsman, M; Postma, J F; Van Westrienen, R W; Wezenbeek, J M

1992-10-01

71

77 FR 50019 - Safety Zone; Cocoa Beach Air Show, Atlantic Ocean, Cocoa Beach, FL  

Federal Register 2010, 2011, 2012, 2013

...Zone; Cocoa Beach Air Show, Atlantic Ocean, Cocoa Beach, FL AGENCY: Coast...safety zone on the waters of the Atlantic Ocean located east of Cocoa Beach...in aerobatic maneuvers over the Atlantic Ocean east of Cocoa Beach,...

2012-08-20

72

NAME: Cedar Beach Creek Habitat Restoration Demonstration Project LOCATION: Cedar Beach County Parke, Suffolk Co., NY  

E-print Network

NAME: Cedar Beach Creek Habitat Restoration Demonstration Project LOCATION: Cedar Beach County: The Cedar Beach Creek Habitat Restoration Demonstration Project will restore local essential ecosystem, beach, and open water mosaic. This project will establish and enhance three critical marine habitats

US Army Corps of Engineers

73

Fate of Microplastics in the Marine Isopod Idotea emarginata.  

PubMed

Plastic pollution is an emerging global threat for marine wildlife. Many species of birds, reptiles, and fishes are directly impaired by plastics as they can get entangled in ropes and drown or they can ingest plastic fragments which, in turn, may clog their stomachs and guts. Microplastics of less than 1 mm can be ingested by small invertebrates, but their fate in the digestive organs and their effects on the animals are yet not well understood. We embedded fluorescent microplastics in artificial agarose-based food and offered the food to marine isopods, Idotea emarginata. The isopods did not distinguish between food with and food without microplastics. Upon ingestion, the microplastics were present in the stomach and in the gut but not in the tubules of the midgut gland which is the principal organ of enzyme-secretion and nutrient resorption. The feces contained the same concentration of microplastics as the food which indicates that no accumulation of microplastics happens during the gut passage. Long-term bioassays of 6 weeks showed no distinct effects of continuous microplastic consumption on mortality, growth, and intermolt duration. I. emarginata are able to prevent intrusion of particles even smaller than 1 ?m into the midgut gland which is facilitated by the complex structure of the stomach including a fine filter system. It separates the midgut gland tubules from the stomach and allows only the passage of fluids and chyme. Our results indicate that microplastics, as administered in the experiments, do not clog the digestive organs of isopods and do not have adverse effects on their life history parameters. PMID:25289587

Hämer, Julia; Gutow, Lars; Köhler, Angela; Saborowski, Reinhard

2014-11-18

74

Chromatophore Behavior in the Isopod Ligia Occidentalis Dana  

E-print Network

C H R O M A T O P H O R E BEHAVIOR I N T H E ISOPOD LIGIA OCCIDENTALIS D A N A , 1853 BY K E N N E T H B. A R M I T A G E Depar tment of Zoology University of Kansas, Lawrence I N T R O D U C T I O N The alteration of body color in Ligia.... The present study was undertaken to examine the pigment responses in the chroma- tophores of Ligia occidentalis Dana, 1853 under varied conditions of light and dark and to correlate the responses with the habits of the animals in their natural environment...

Armitage, Kenneth

1960-01-01

75

Beach/Fireworks Notes from the Office  

E-print Network

Highlights · Beach/Fireworks · Notes from the Office · Birthdays · Manners TheELIWeekly Beach at Crescent Beach. We will drive to the beach and spend the day sunning, swimming, and having fun! After the beach, we will come back to campus to watch fireworks at Flavet Field. WHEN: Saturday, July 3rd. Meet

Pilyugin, Sergei S.

76

Tonic immobility in terrestrial isopods: intraspecific and interspecific variability.  

PubMed

Many arthropods, including terrestrial isopods, are capable of entering a state of tonic immobility upon a mechanical disturbance. Here we compare the responses to mechanical stimulation in three terrestrial isopods Balloniscus glaber, Balloniscus sellowii and Porcellio dilatatus. We applied three stimuli in a random order and recorded whether each individual was responsive (i.e. showed tonic immobility) or not and the duration of the response. In another trial we related the time needed to elicit tonic immobility and the duration of response of each individual. Balloniscus sellowii was the least responsive species and Porcellio dilatatus was the most, with 23% and 89% of the tested individuals, respectively, being responsive. Smaller Balloniscus sellowii were more responsive than larger individuals. Porcellio dilatatus responded more promptly than the Balloniscus spp. but it showed the shortest response. Neither sex, size nor the type of stimulus explained the variability found in the duration of tonic immobility. These results reveal a large variability in tonic immobility behavior, even between closely related species, which seems to reflect a species-specific response to predators with different foraging modes. PMID:22536106

Quadros, Aline Ferreira; Bugs, Priscila Silva; Araujo, Paula Beatriz

2012-01-01

77

Molecular evolution of the androgenic hormone in terrestrial isopods.  

PubMed

In crustaceans, the androgenic gland (AG), thanks to the synthesis of the androgenic gland hormone (AGH), controls the differentiation of the primary and secondary male sexual characters. In this study, we amplified 12 new AGH cDNAs in species belonging to five different families of the infra-order Ligiamorpha of terrestrial isopods. Putative essential amino acids for the production of a functional AGH protein exhibit signatures of negative selection and are strictly conserved including typical proteolytic cleavage motifs, a putative N-linked glycosylation motif on the A chains and the eight Cys positions. An insulin-like growth factor motif was also identified in Armadillidium AGH sequences. The phylogenetic relationships of AGH sequences allowed one to distinguish two main clades, corresponding to members of the Armadillidiidae and the Porcellionidae families which are congruent with the narrow specificity of AG heterospecific grafting. An in-depth understanding of the regulation of AGH expression would help deciphering the interaction between Wolbachia, widespread feminizing endosymbiotic bacteria in isopods, and the sex differentiation of their hosts. PMID:24561051

Cerveau, Nicolas; Bouchon, Didier; Bergès, Thierry; Grève, Pierre

2014-04-25

78

Isolation and characterization of microsatellite loci for the isopod crustacean Armadillidium vulgare and transferability in terrestrial isopods.  

PubMed

Armadillidium vulgare is a terrestrial isopod (Crustacea, Oniscidea) which harbors Wolbachia bacterial endosymbionts. A. vulgare is the major model for the study of Wolbachia-mediated feminization of genetic males in crustaceans. As a consequence of their impact on host sex determination mechanisms, Wolbachia endosymbionts are thought to significantly influence A. vulgare evolution on various grounds, including population genetic structure, diversity and reproduction strategies. To provide molecular tools for examining these questions, we isolated microsatellite loci through 454 pyrosequencing of a repeat-enriched A. vulgare genomic library. We selected 14 markers and developed three polymorphic microsatellite multiplex kits. We tested the kits on two A. vulgare natural populations and found high genetic variation, thereby making it possible to investigate the impact of Wolbachia endosymbionts on A. vulgare nuclear variation at unprecedented resolution. In addition, we tested the transferability of these kits by cross-species amplification in five other terrestrial isopod species harboring Wolbachia endosymbionts. The microsatellite loci showed good transferability in particular in Armadillidium nasatum and Chaetophiloscia elongata, for which these markers represent promising tools for future genetic studies. PMID:24098543

Giraud, Isabelle; Valette, Victorien; Bech, Nicolas; Grandjean, Frédéric; Cordaux, Richard

2013-01-01

79

Isolation and Characterization of Microsatellite Loci for the Isopod Crustacean Armadillidium vulgare and Transferability in Terrestrial Isopods  

PubMed Central

Armadillidium vulgare is a terrestrial isopod (Crustacea, Oniscidea) which harbors Wolbachia bacterial endosymbionts. A. vulgare is the major model for the study of Wolbachia-mediated feminization of genetic males in crustaceans. As a consequence of their impact on host sex determination mechanisms, Wolbachia endosymbionts are thought to significantly influence A. vulgare evolution on various grounds, including population genetic structure, diversity and reproduction strategies. To provide molecular tools for examining these questions, we isolated microsatellite loci through 454 pyrosequencing of a repeat-enriched A. vulgare genomic library. We selected 14 markers and developed three polymorphic microsatellite multiplex kits. We tested the kits on two A. vulgare natural populations and found high genetic variation, thereby making it possible to investigate the impact of Wolbachia endosymbionts on A. vulgare nuclear variation at unprecedented resolution. In addition, we tested the transferability of these kits by cross-species amplification in five other terrestrial isopod species harboring Wolbachia endosymbionts. The microsatellite loci showed good transferability in particular in Armadillidium nasatum and Chaetophiloscia elongata, for which these markers represent promising tools for future genetic studies. PMID:24098543

Bech, Nicolas; Grandjean, Frederic; Cordaux, Richard

2013-01-01

80

Terrestrial isopods -- a good choice for toxicity testing of pollutants in the terrestrial environment  

SciTech Connect

Terrestrial isopods are suitable invertebrates for testing the relative toxicities of chemicals present in the terrestrial environment. Terrestrial isopods respond in numerous ways to elevated concentrations of chemicals in their food, but only a few of these responses can be used as toxicological endpoints. The most suitable are changes in reproduction, food consumption, moult cycle duration, and structure of the digestive glands. These responses are able to provide accurate indications of sublethal toxicity. Toxicity tests with terrestrial isopods could be much more reliable through the use of positive controls. A positive control with a reference toxicant could also be supplemented by a reference endpoint. The most suitable reference endpoint is change of food consumption rate. Toxicity testing with terrestrial isopods is a very promising method for fast, routine, and inexpensive laboratory determination of the relative toxicities of chemicals in the terrestrial environment.

Drobne, D. [Univ. of Ljubljana (Slovenia). Dept. of Biology

1997-06-01

81

The Sublethal Effects and Accumulation of Cadmium in the Terrestrial Isopod Porcellio laevis Latr. (Crustacea, Isopoda)  

Microsoft Academic Search

.   This study investigated the sublethal effects of CdSO4 on the terrestrial isopod species Porcellio laevis and its capacity to accumulate and compartmentalize cadmium. The ability of P. laevis to discriminate between uncontaminated and CdSO4-contaminated leaves was also studied. It was shown that sublethal effects in terms of mass changes of exposed isopods occur\\u000a at cadmium concentrations between 10 and

J. P. Odendaal; A. J. Reinecke

1999-01-01

82

Seasonal Abundance and Occurrence of the Asian Isopod Synidotea laevidorsalis in Delaware Bay, USA  

Microsoft Academic Search

In 1999 the marine isopod Synidotea laevidorsalis (Miers 1881), indigenous to the northwest Pacific, was first documented in Delaware Bay, USA. We monitored weekly recruitment\\u000a of this isopod and several other motile species in the Maurice River, a tributary of Delaware Bay. A spatial survey was also\\u000a conducted. Abundance of S. laevidorsalis varied seasonally but overwhelmingly dominated other co-occurring species

David Bushek; Sean Boyd

2006-01-01

83

An Analysis of Factors Affecting the Oxygen Consumption of the Isopod Ligia oceanica  

E-print Network

AN ANALYSIS OF FACTORS AFFECTING THE OXYGEN CONSUMPTION OF THE ISOPOD LIGIA OCEANICA1 R. C. NEWELL, A. ROY, AND K. B. ARMITAGE Institute of Biology, University of Odense, 5000 Odense, Denmark;2 Department des Sciences Biologiques, Universit& de... temperature, starvation time, lipid content, acclimation time, and body size. The isopod Ligia oceanica was selected because it lives well in the laboratory and was available in a wide variety of sizes. There is also some information in the literature...

Newell, R. C.; Roy, A.; Armitage, Kenneth

1997-01-01

84

Global Diversity of Marine Isopods (Except Asellota and Crustacean Symbionts)  

PubMed Central

The crustacean order Isopoda (excluding Asellota, crustacean symbionts and freshwater taxa) comprise 3154 described marine species in 379 genera in 37 families according to the WoRMS catalogue. The history of taxonomic discovery over the last two centuries is reviewed. Although a well defined order with the Peracarida, their relationship to other orders is not yet resolved but systematics of the major subordinal taxa is relatively well understood. Isopods range in size from less than 1 mm to Bathynomus giganteus at 365 mm long. They inhabit all marine habitats down to 7280 m depth but with few doubtful exceptions species have restricted biogeographic and bathymetric ranges. Four feeding categories are recognised as much on the basis of anecdotal evidence as hard data: detritus feeders and browsers, carnivores, parasites, and filter feeders. Notable among these are the Cymothooidea that range from predators and scavengers to external blood-sucking micropredators and parasites. Isopods brood 10–1600 eggs depending on individual species. Strong sexual dimorphism is characteristic of several families, notably in Gnathiidae where sessile males live with a harem of females while juvenile praniza stages are ectoparasites of fish. Protandry is known in Cymothoidae and protogyny in Anthuroidea. Some Paranthuridae are neotenous. About half of all coastal, shelf and upper bathyal species have been recorded in the MEOW temperate realms, 40% in tropical regions and the remainder in polar seas. The greatest concentration of temperate species is in Australasia; more have been recorded from temperate North Pacific than the North Atlantic. Of tropical regions, the Central Indo-Pacific is home to more species any other region. Isopods are decidedly asymmetrical latitudinally with 1.35 times as many species in temperate Southern Hemisphere than the temperate North Atlantic and northern Pacific, and almost four times as many Antarctic as Arctic species. More species are known from the bathyal and abyssal Antarctic than Arctic GOODS provinces, and more from the larger Pacific than Atlantic oceans. Two areas with many species known are the New Zealand-Kermadec and the Northern North Pacific provinces. Deep hard substrates such as found on seamounts and the slopes are underrepresented in samples. This, the documented numbers of undescribed species in recent collections and probable cryptic species suggest a large as yet undocumented fauna, potentially an order of magnitude greater than presently known. PMID:22952700

Poore, Gary C. B.; Bruce, Niel L.

2012-01-01

85

Effect of Endosulfan and Parathion on Energy Reserves and Physiological Parameters of the Terrestrial Isopod Porcellio dilatatus  

Microsoft Academic Search

The in vivo e4ects of parathion and endosulfan on the isopod Porcellio dilatatus were investigated. Feeding parameters (food consumption and assimilation rates), growth, and energy re- serves (glycogen, lipid, and protein contents) of pesticide-exposed isopods were compared with those of control animals. Isopods were exposed to a wide range of concentrations of parathion or endosulfan (0.1, 1, 10, 25, 50,

J. P. Sous; A. J. A. Nogueira

2001-01-01

86

Morphology and function of cuticular micro-scales and corresponding structures in terrestrial isopods (Crust., Isop., Oniscoidea)  

Microsoft Academic Search

Summary In nearly all terrestrial isopods the cuticle of the tergites is equipped with scale-like, circular or polygonal micro-ridges, whereas in aquatic isopods the cuticle is smooth. Brief descriptions of the microscopic cuticle surface and corresponding SEM photographs are given for 16 isopod species. The function of these structures is considered to be ‘anti-adhesive’, preventing small wet substrate particles from

Helmut Schmalfuss

1978-01-01

87

Contemporary Parallel Diversification, Antipredator Adaptations and Phenotypic Integration in an Aquatic Isopod  

PubMed Central

It is increasingly being recognized that predation can be a strong diversifying agent promoting ecological divergence. Adaptations against different predatory regimes can emerge over short periods of time and include many different traits. We studied antipredator adaptations in two ecotypes of an isopod (Asellus aquaticus) that have, diverged in parallel in two Swedish lakes over the last two decades. We quantified differences in escape speed, morphology and behavior for isopods from different ecotypes present in these lakes. Isopods from the source habitat (reed) coexist with mainly invertebrate predators. They are more stream-profiled and have higher escape speeds than isopods in the newly colonized stonewort habitat, which has higher density of fish predators. Stonewort isopods also show more cautious behaviors and had higher levels of phenotypic integration between coloration and morphological traits than the reed isopods. Colonization of a novel habitat with a different predation regime has thus strengthened the correlations between pigmentation and morphology and weakened escape performance. The strong signature of parallelism for these phenotypic traits indicates that divergence is likely to be adaptive and is likely to have been driven by differences in predatory regimes. Furthermore, our results indicate that physical performance, behavior and morphology can change rapidly and in concert as new habitats are colonized. PMID:19587791

Eroukhmanoff, Fabrice; Svensson, Erik I.

2009-01-01

88

Are They Beach Cusps or Beach Horns? A Kauai Observation  

NASA Astrophysics Data System (ADS)

Beach cusps on a southwest Kauai shoreline exhibit departures from the current schools of thought on cusp dynamics. Beach sediment is either carbonate sand or volcanic sand. The horns of the beach cusps are depositional features, reflecting the migration of sediment along the beach during the waning storm-wave (energy) phase and represent a building of the beach face. This phase may be comparable to the development of distinct sediment-transport bedforms in a unidirectional flow environment that develop at distinct ranges of Froude number. Heterogeneities such as groundwater-sapping patterns after storms, protruding bedrock, and variation of sediment size along the initial beach front (perhaps as a result of previous cusp development) provide the initial irregularities to initiate cusp morphology with evolution to a more rhythmic pattern because of the major feedback processes in the beach cusp environment. Although cusps may be stationary at some locations, transport of sediment along the shore is still occurring. The term beach horns, instead of beach cusps, should be used because the morphology is developed as a consequence of horn development. At the start of the field observation, long-period (LP) waves from south-southwest of Kauai dominated the shorter period Trade-Wind (TW) waves which are refracted around the island. The LP waves generated high-surf warnings. At this time, the cusps had an asymmetric pattern with the main backwash close to the horn located on the side of the cusp that represents the direction of longshore transport. Active erosion of the horn took place on the side of the cusp where more backwash occurred. The horn crests had an acute angle towards the approaching LP wave front. As the energy of the LP waves decreased, the TW waves became more dominant in the interference pattern of the two wave forms. The beach cusps reflected this change of interference in terms of symmetry as they became more symmetrical. Significant transport of sediment within the cusp feature was limited to high-tide periods. Troughs form offshore in front of the horns and sediment buildup occurs offshore of the cusps. Backwash in the cusp interferes with incoming waves, resulting in sediment deposition. In contrast, waves impinging on the horns had no interference from backwash and eroded the offshore troughs, depositing the sediment on the surface of the horn with additional sediment being carried into the cusps. Beach cusp processes were the same on the two types of beaches along this shoreline.

Pederson, D. T.

2004-12-01

89

Traits underpinning desiccation resistance explain distribution patterns of terrestrial isopods.  

PubMed

Predicted changes in soil water availability regimes with climate and land-use change will impact the community of functionally important soil organisms, such as macro-detritivores. Identifying and quantifying the functional traits that underlie interspecific differences in desiccation resistance will enhance our ability to predict both macro-detritivore community responses to changing water regimes and the consequences of the associated species shifts for organic matter turnover. Using path analysis, we tested (1) how interspecific differences in desiccation resistance among 22 northwestern European terrestrial isopod species could be explained by three underlying traits measured under standard laboratory conditions, namely, body ventral surface area, water loss rate and fatal water loss; (2) whether these relationships were robust to contrasting experimental conditions and to the phylogenetic relatedness effects being excluded; (3) whether desiccation resistance and hypothesized underlying traits could explain species distribution patterns in relation to site water availability. Water loss rate and (secondarily) fatal water loss together explained 90% of the interspecific variation in desiccation resistance. Our path model indicated that body surface area affects desiccation resistance only indirectly via changes in water loss rate. Our results also show that soil moisture determines isopod species distributions by filtering them according to traits underpinning desiccation resistance. These findings reveal that it is possible to use functional traits measured under standard conditions to predict soil biota responses to water availability in the field over broad spatial scales. Taken together, our results demonstrate an increasing need to generate mechanistic models to predict the effect of global changes on functionally important organisms. PMID:23224790

Dias, André T C; Krab, Eveline J; Mariën, Janine; Zimmer, Martin; Cornelissen, Johannes H C; Ellers, Jacintha; Wardle, David A; Berg, Matty P

2013-07-01

90

Florida: Clearwater Beach and Pier 60  

Microsoft Academic Search

Clearwater Beach, a year-round vacation spot, spans 3 miles along the coast of Florida. With its clean white sand and various attractions, this beach, located just 20 miles from the Tampa International Airport, makes the perfect vacation spot for any age group. Amenities on the beach and around the beach include: parasailing, pirate ship cruises, restaurants, and a range from

Chet Smolski

1978-01-01

91

Beach Hopper Bonanza Grade Level: Second Grade  

E-print Network

Beach Hopper Bonanza Grade Level: Second Grade Developers: Jan Ward, Merry Lojkovic, Kara Davidson the characteristics, behavior, and anatomy of beach hoppers. !" Examine the relationships between the beach hopper (transparent) !" 1-2 buckets !" sieves !" shovel !" small plastic container with lid to hold beach hoppers

92

AES Huntington Beach Generation Station Surf Zone  

E-print Network

AES Huntington Beach Generation Station Surf Zone Water Quality Study Prepared For: California HUNTINGTON BEACH GENERATING STATION SURF ZONE WATER QUALITY STUDY Prepared for: California of the Applied Energy Services (AES) Huntington Beach Generating Station (AES HBGS) in 2001, a near shore beach

93

Nonlinear Magnetic Beach  

NASA Astrophysics Data System (ADS)

The ion response to the rf-field in the magnetic beach problem can be essentially nonlinear. This paper presents a self-consistent theory of the rf-wave propagation and ion motion through the ion cyclotron resonance. An important ingredient of the problem is the ion flow along the magnetic field. The flow velocity limits the time the ions spend at the resonance, which in turn limits the ion energy gain. A feature that makes the problem nonlinear is that the flow accelerates under the effect of the grad B force and rf-pressure. This acceleration can produce a steep decrease in the plasma density at the resonance, resulting in partial reflection of the incident wave. *Work supported by VASIMR project at NASA and by U.S. DOE Contract DE-FG03-96ER-54346.

Arefiev, A.; Breizman, B.

2000-10-01

94

NATURE: Hippo Beach  

NSDL National Science Digital Library

This website is the online companion to Hippo Beach, which recently aired on the PBS series NATURE. And as the website explains, "from the study of hippos' essential relationships with birds to the discovery that hippos can communicate underwater, these mammals deserve a closer look." Students can get a closer look with "Sun, Sand, and Hippos," an interdisciplinary lesson plan for grades 3-5. The lesson guides students in researching and creating presentations on hippos and helpful weblinks, worksheets, and a teacher's guide are provided. The website contains other special features as well, including video clips from the program, multimedia activities, informative essays, and more. [RS] This site is also reviewed in the November 14, 2003 NSDL Life Sciences Report.

95

Coastal Erosion: Where's the Beach?  

NSDL National Science Digital Library

This data tip from Bridge, the Ocean Sciences Education Teacher Resource Center archive, explores erosion and accretion of coastal sediments, the two processes that keep our beaches in a constant state of change. Both natural and not-so-natural factors influencing these processes are discussed. Learners can view a variety of weblinks on the topic and conduct their own beach profile investigation, or access profile data from a 1999 Ocean City, Maryland beach and plot the changes over time for a graphic illustration of these processes.

2000-05-01

96

Widespread atypical mitochondrial DNA structure in isopods (Crustacea, Peracarida) related to a constitutive heteroplasmy in terrestrial species.  

PubMed

Metazoan mitochondrial DNA (mtDNA) is generally composed of circular monomeric molecules. However, a few exceptions do exist and among them two terrestrial isopods Armadillidium vulgare and Porcellionides pruinosus have an atypical mtDNA composed of linear monomers associated with circular "head-to-head" dimers: a very unusual structure for animal mtDNA genome. To assess the distribution of this atypical mtDNA among isopods, we performed RFLP and Southern blot analyses on mtDNA of 16 terrestrial (Oniscidea family) and two aquatic isopod species: the marine Sphaeroma serratum (suborder Flabellifera, sister group of Oniscidea) and the freshwater Asellus aquaticus (Asellota, early derived taxon of isopod). The atypical mtDNA structure was observed in 15 terrestrial isopod species and A. aquaticus, suggesting a wide distribution of atypical mtDNA among isopods. However, a typical metazoan mtDNA structure was detected in the marine isopod S. serratum and the Oniscidea Ligia oceanica . Our results suggest two possible scenarios: an early origin of the atypical mtDNA in isopods followed by reversion to the typical ancestral mtDNA structure for several species, or a convergent appearance of the atypical mtDNA structure in two isopod suborders. We compare this distribution of the atypical mtDNA structure with the presence of a heteroplasmy also observed in the mtDNA of several terrestrial isopod species. We discuss if this transmitted heteroplasmy is vectored by the atypical mtDNA and its impact on the maintenance of the atypical mtDNA in isopods. PMID:22376074

Doublet, Vincent; Raimond, Roland; Grandjean, Frédéric; Lafitte, Alexandra; Souty-Grosset, Catherine; Marcadé, Isabelle

2012-03-01

97

Benign effect of the fish parasitic isopod Ceratothoa cf. imbricata on Selenotoca multifasciata (Scatophagidae) from Australia.  

PubMed

The tongue-biter cymothoid isopod Ceratothoa cf. imbricata is nearly ubiquitous in buccal cavities of the banded scat Selenotoca multifasciata (Scatophagidae) from Waterloo Bay, south-east Queensland. To test whether infestation affects fish growth or condition significantly, we explored parasitism and condition in 122 S. multifasciata specimens. The internal area of the buccal cavity and that occupied by ovigerous female isopods were measured, allowing the relative proportion of free internal area of the buccal cavity (PFIAO) to be calculated. Of 122 fish, 119 (97.5%) were infected; 35.3% had large female isopods, the remaining infections comprised much smaller mancae, juveniles and adult males. Mean intensity of infection was significantly correlated with fish total length (TL). In some fish, the female isopod occupied up to 80% of the buccal cavity area. There was little evidence of attachment damage in the buccal cavity; only 9 of 43 hosts analysed had restricted damage to the tissues at the points of attachment of the female isopod. Condition factor, food intensity index and stomach weight did not differ between fish with and without female C. cf. imbricata. The relative proportion of free internal area of the buccal cavity with respect to the fish total length (PFIAO/TL2 ratio) of fish infected with females correlated with food intensity and condition factor. Although the correlation was significant, the actual effect was not large because more than 70% of these 2 indices was not explained by the PFIAO/TL2 ratio (r2 < 0.3 in both cases). Despite the dramatic appearance of infestations and the high prevalence of C. cf. imbricata in the population, the near-absence of pathological alterations and the limited effect of the isopod on the condition indices and food intensity suggest that this isopod is relatively benign for S. multifasciata. PMID:25114041

Carrassón, M; Cribb, T H

2014-08-11

98

77 FR 27120 - Safety Zone; Virginia Beach Oceanfront Air Show, Atlantic Ocean, Virginia Beach, VA  

Federal Register 2010, 2011, 2012, 2013

...Virginia Beach Oceanfront Air Show, Atlantic Ocean, Virginia Beach, VA AGENCY...a temporary safety zone on the Atlantic Ocean in the vicinity of Virginia Beach...vessel traffic movement on the Atlantic Ocean to protect mariners from the...

2012-05-09

99

Sea-land transitions in isopods: pattern of symbiont distribution in two species of intertidal isopods Ligia pallasii and Ligia occidentalis in the Eastern Pacific.  

PubMed

Studies of microbial associations of intertidal isopods in the primitive genus Ligia (Oniscidea, Isopoda) can help our understanding of the formation of symbioses during sea-land transitions, as terrestrial Oniscidean isopods have previously been found to house symbionts in their hepatopancreas. Ligia pallasii and Ligia occidentalis co-occur in the high intertidal zone along the Eastern Pacific with a large zone of range overlap and both species showing patchy distributions. In 16S rRNA clone libraries mycoplasma-like bacteria (Firmicutes), related to symbionts described from terrestrial isopods, were the most common bacteria present in both host species. There was greater overall microbial diversity in Ligia pallasii compared with L. occidentalis. Populations of both Ligia species along an extensive area of the eastern Pacific coastline were screened for the presence of mycoplasma-like symbionts with symbiont-specific primers. Symbionts were present in all host populations from both species but not in all individuals. Phylogenetically, symbionts of intertidal isopods cluster together. Host habitat, in addition to host phylogeny appears to influence the phylogenetic relation of symbionts. PMID:20730112

Eberl, Renate

2010-07-01

100

Sea-land transitions in isopods: pattern of symbiont distribution in two species of intertidal isopods Ligia pallasii and Ligia occidentalis in the Eastern Pacific  

PubMed Central

Studies of microbial associations of intertidal isopods in the primitive genus Ligia (Oniscidea, Isopoda) can help our understanding of the formation of symbioses during sea-land transitions, as terrestrial Oniscidean isopods have previously been found to house symbionts in their hepatopancreas. Ligia pallasii and Ligia occidentalis co-occur in the high intertidal zone along the Eastern Pacific with a large zone of range overlap and both species showing patchy distributions. In 16S rRNA clone libraries mycoplasma-like bacteria (Firmicutes), related to symbionts described from terrestrial isopods, were the most common bacteria present in both host species. There was greater overall microbial diversity in Ligia pallasii compared with L. occidentalis. Populations of both Ligia species along an extensive area of the eastern Pacific coastline were screened for the presence of mycoplasma-like symbionts with symbiont-specific primers. Symbionts were present in all host populations from both species but not in all individuals. Phylogenetically, symbionts of intertidal isopods cluster together. Host habitat, in addition to host phylogeny appears to influence the phylogenetic relation of symbionts. PMID:20730112

2010-01-01

101

Phylogeography of Supralittoral Rocky Intertidal Ligia Isopods in the Pacific Region from Central California to Central Mexico  

Microsoft Academic Search

BackgroundLigia isopods are widely distributed in the Pacific rocky intertidal shores from central California to central Mexico, including the Gulf of California. Yet, their biological characteristics restrict them to complete their life cycles in a very narrow range of the rocky intertidal supralittoral. Herein, we examine phylogeographic patterns of Ligia isopods from 122 localities between central California and central Mexico.

Luis A. Hurtado; Mariana Mateos; Carlos A. Santamaria; Sharyn Jane Goldstien

2010-01-01

102

Distribution, density, and habitat use among native and introduced populations of the Australasian burrowing isopod Sphaeroma quoianum  

Microsoft Academic Search

The Australasian burrowing isopod (Sphaeroma quoianum) has been introduced to numerous embayments along the Pacific coast of North America. In some bays, populations of S. quoianum can exceed tens of thousands of individuals m?3 and bioturbation by the isopods can exacerbate shoreline erosion. Within their native range, however, studies recognize S. quoianum primarily as a woodborer. We measured the distribution,

Timothy M. Davidson; Chad L. Hewitt; Marnie Campbell

2008-01-01

103

Morphological Description of Bacterial Infection of Digestive Glands in the Terrestrial Isopod Porcellio scaber(Isopoda, Crustacea)  

Microsoft Academic Search

Morphological studies of the hepatopancreas of the terrestrial isopodPorcellio scaberrevealed bacterial infection. The percentage of infected animals collected from the same site varied from 0 to 10% during the 4 years of study. Transmission electron microscopy, scanning electron microscopy, and light microscopy revealed that infected glands differed from those in healthy isopods. The most prominent sign was white spots between

D. Drobne; J. Štrus; N. Žnidarši?; P. Zidar

1999-01-01

104

Photosensitive neurogenic heart of the isopod crustacean Ligia exotica  

PubMed Central

The heart of animals is regulated through the central nervous system in response to external sensory stimuli. We found, however, that the adult neurogenic heart of the isopod crustacean Ligia exotica has photosensitivity. The beat frequency of the isolated heart decreased in response to a light stimulus. Magnitude of the response was stimulus intensity dependent and the heartbeat frequency decreased to less than 80% of the dark value during illumination of the white light with an intensity of 6.0?mW?cm?2. The spectral sensitivity curve of the heart photoresponse peaked at a wavelength around 520?nm. In response to 530?nm monochromatic light, the relationship between light intensity and response magnitude was linear and the threshold intensity was 7.26×1012?quanta?cm?2?s?1. Bursting activity of the cardiac ganglion, which is located in the heart and acts as the cardiac pacemaker deceased in frequency in response to illumination by white light. This fact suggests that the heart photoresponse of L. exotica results from the photosensitivity of the cardiac ganglion neurons. The photoresponse of the heart therefore contributes to regulation of cardiac output in addition to other regulatory systems. PMID:16959646

Miyamoto, Hiroshi; Horiguchi, Hiroko; Hariyama, Takahiko; Takano, Satoshi; Yamagishi, Hiroshi

2006-01-01

105

Photosensitive neurogenic heart of the isopod crustacean Ligia exotica.  

PubMed

The heart of animals is regulated through the central nervous system in response to external sensory stimuli. We found, however, that the adult neurogenic heart of the isopod crustacean Ligia exotica has photosensitivity. The beat frequency of the isolated heart decreased in response to a light stimulus. Magnitude of the response was stimulus intensity dependent and the heartbeat frequency decreased to less than 80% of the dark value during illumination of the white light with an intensity of 6.0 mW cm-2. The spectral sensitivity curve of the heart photoresponse peaked at a wavelength around 520 nm. In response to 530 nm monochromatic light, the relationship between light intensity and response magnitude was linear and the threshold intensity was 7.26 x 1012 quanta cm-2 s-1. Bursting activity of the cardiac ganglion, which is located in the heart and acts as the cardiac pacemaker deceased in frequency in response to illumination by white light. This fact suggests that the heart photoresponse of L. exotica results from the photosensitivity of the cardiac ganglion neurons. The photoresponse of the heart therefore contributes to regulation of cardiac output in addition to other regulatory systems. PMID:16959646

Miyamoto, Hiroshi; Horiguchi, Hiroko; Hariyama, Takahiko; Takano, Satoshi; Yamagishi, Hiroshi

2006-10-01

106

Surface characteristics of isopod digestive gland epithelium studied by SEM.  

PubMed

The structure of the digestive gland epithelium of a terrestrial isopod Porcellio scaber has been investigated by conventional scanning electron microscopy (SEM), focused ion beam-scanning electron microscopy (FIB/SEM), and light microscopy in order to provide evidence on morphology of the gland epithelial surface in animals from a stock culture. We investigated the shape of cells, extrusion of lipid droplets, shape and distribution of microvilli, and the presence of bacteria on the cell surface. A total of 22 animals were investigated and we found some variability in the appearance of the gland epithelial surface. Seventeen of the animals had dome-shaped digestive gland "normal" epithelial cells, which were densely and homogeneously covered by microvilli and varying proportions of which extruded lipid droplets. On the surface of microvilli we routinely observed sparsely distributed bacteria of different shapes. Five of the 22 animals had "abnormal" epithelial cells with a significantly altered shape. In three of these animals, the cells were much smaller, partly or completely flat or sometimes pyramid-like. A thick layer of bacteria was detected on the microvillous border, and in places, the shape and size of microvilli were altered. In two animals, hypertrophic cells containing large vacuoles were observed indicating a characteristic intracellular infection. The potential of SEM in morphological investigations of epithelial surfaces is discussed. PMID:20155290

Millaku, Agron; Leser, Vladka; Drobne, Damjana; Godec, Matjaz; Torkar, Matjaz; Jenko, Monika; Milani, Marziale; Tatti, Francesco

2010-05-01

107

75 FR 24997 - FPL Energy Point Beach, LLC; Point Beach Nuclear Plant, Units 1 and 2; Environmental Assessment...  

Federal Register 2010, 2011, 2012, 2013

...the Point Beach Nuclear Plant, Units...from ``FPL Energy Point Beach...to ``NextEra Energy Point Beach...for Point Beach Nuclear Plant, Units...a significant effect on the quality of the human environment....

2010-05-06

108

Uptake and elimination of benzo[a]pyrene in the terrestrial isopod Porcellio scaber.  

PubMed

In isopods from contaminated sites relatively low levels of high molecular weight polycyclic aromatic hydrocarbons (PAHs) have been observed, which may be caused by either a low bioavailability or a high elimination rate. To shed light on this, the uptake and elimination rates of benzo[a]pyrene were estimated for the isopod Porcellio scaber. The isopod was fed contaminated food (100 microg benzo[a]pyrene/g dwt) for seven weeks followed by four weeks of untreated food. The hindguts of the animals were removed prior to analysis to exclude food material from the body. Benzo[a]pyrene concentrations were log-normally distributed among the individuals. The high inter-individual variation in benzo[a]pyrene content could not be explained from differences in sex, the estimated amount of food in the hindgut, or the body weight. A one-compartment model fitted to the isopod concentrations estimated an assimilation rate of 2.9 microg benzo[a]pyrene/g dwt day, an elimination rate constant of 1.1/day and an equilibrium concentration of 2.5 microg benzo[a]pyrene/g dwt. According to the model 68% of the isopod population had an equilibrium concentration between 1.0 and 7.2 microg benzo[a]pyrene/g dwt day with a benzo[a]pyrene half-life ranging between 0.4 and 1.3 days. The assimilation efficiency was estimated at 20 to 40% of the ingested benzo[a]pyrene. The tissue distribution of benzo[a]pyrene was investigated in a separate experiment. Trace levels of benzo[a]pyrene were detected in haemolymph samples, demonstrating absorption and transport of the compound in the isopod. It is concluded that dietary benzo[a]pyrene is available for uptake to the isopod and that low residues of the compound observed in field isopods are the result of a high elimination rate rather than a reduced bioavailability. As PAHs from soil appear to be available to soil invertebrates, the widespread contamination of the soil from atmospheric emissions is of some concern, especially since the observed elimination may be linked to metabolic activation of PAHs. PMID:8781081

van Brummelen, T C; van Straalen, N M

1996-08-01

109

An analysis of factors affecting the oxygen consumption of the isopod Ligia oceanica  

E-print Network

AN ANALYSIS OF FACTORS AFFECTING T H E O X Y G E N CONSUMPTION OF THE ISOPOD LIGIA OCEANICA 1 R . C . N E W E L L , A . R O Y , A N D K . B. A R M I T A G E Inst i tute of B i o l o g y , Univers i ty of Odense , 5000 Odense, D e n m a r k ; 2 D.... According­ ly, the second phase of our work was to study the effects on metabolism of acclimation temperature, short-term ex­ posure temperature, starvation time, lipid content, acclimation time, and body size. The isopod Ligia oceanica was selected...

Armitage, Kenneth

1976-01-01

110

Beach Cusps of Monterey Bay, California.  

National Technical Information Service (NTIS)

A radiographic study was conducted on impregnated sand samples taken from beach cusps on Marina Beach, Monterey Bay, California, over a 7-month period from September 1970 to April 1971. The radiographs revealed much more structure than is discernable with...

J. L. Brueggeman

1971-01-01

111

Newport Beach Police Department Press Release870 Santa Barbara Dr., Newport Beach, CA 92660  

E-print Network

Newport Beach Police Department Press Release870 Santa Barbara Dr., Newport Beach, CA 92660, at approximately 8 a.m., Newport Beach Police Detectives served a search warrant in the 1000 block of Valencia for 496 PC ­ Possession of Stolen Property. They were booked at the Newport Beach Police Jail and were

Rose, Michael R.

112

Week 5, A 'Sweet As' Beach and Ride Murdering Beach at sunset.  

E-print Network

Week 5, A 'Sweet As' Beach and Ride Murdering Beach at sunset. I'm starting to get used Point trailhead, we turned off on a steep road down to Murdering Beach. Apparently a murder did occur for the sunset. #12;Tidal Pool at Murdering Beach Also this week, I brought the camera along on what has become

Bardsley, John

113

33 CFR 100.736 - Annual Fort Myers Beach air show; Fort Myers Beach, FL.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 2011-07-01 false Annual Fort Myers Beach air show; Fort Myers Beach, FL. 100.736 Section 100.736 Navigation...NAVIGABLE WATERS § 100.736 Annual Fort Myers Beach air show; Fort Myers Beach, FL....

2011-07-01

114

33 CFR 100.736 - Annual Fort Myers Beach air show; Fort Myers Beach, FL.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false Annual Fort Myers Beach air show; Fort Myers Beach, FL. 100.736 Section 100.736 Navigation...NAVIGABLE WATERS § 100.736 Annual Fort Myers Beach air show; Fort Myers Beach, FL....

2013-07-01

115

West Onslow Beach and New River Inlet (Topsail Beach), North Carolina  

E-print Network

West Onslow Beach and New River Inlet (Topsail Beach), North Carolina 17 April 2008 Abstract: Topsail Beach lies along the southwestern end of Topsail Island, a sandy barrier island about two miles are estimated at $9,200,00 The proposed project for coastal storm damage reduction is a traditional beach

US Army Corps of Engineers

116

Fish in Long Beach waters have risky contamination levels From staff reports Long Beach Press Telegram  

E-print Network

Fish in Long Beach waters have risky contamination levels From staff reports Long Beach Press coast showed high levels of methylmercury and moderate levels of PCBs in fish in Long Beach bay waters the coast. In the bay waters of Long Beach, the levels found in fish were of "high concern," according

117

NAME: City of Long Beach's Colorado Lagoon LOCATION: Long Beach, California  

E-print Network

NAME: City of Long Beach's Colorado Lagoon LOCATION: Long Beach, California ACRES: 28.3 acres NON-FEDERAL SPONSORS: City of Long Beach Friends of Colorado Lagoon PROJECT DESCRIPTION: The Colorado Lagoon is a 28 of visitors from communities within and surrounding the City of Long Beach, California. There are over 700

US Army Corps of Engineers

118

33 CFR 100.736 - Annual Fort Myers Beach air show; Fort Myers Beach, FL.  

Code of Federal Regulations, 2012 CFR

...2012-07-01 2012-07-01 false Annual Fort Myers Beach air show; Fort Myers Beach, FL. 100.736 Section 100.736 Navigation...NAVIGABLE WATERS § 100.736 Annual Fort Myers Beach air show; Fort Myers Beach, FL....

2012-07-01

119

ODU Virginia Beach 1881 University Drive  

E-print Network

Live at ODU Virginia Beach 1881 University Drive Virginia Beach, VA 23453 757-368-4100 www.odu.edu/vabeach Thursday October 9 2014 12:30--1:30pm Lecture Hall Book signing and Reception to follow: Book sales in Lot 3 Ellen Dor� Watson The HungryHeart isTellingYou ODU Virginia Beach Presents Poetry Readings

120

The Belgian sandy beach ecosystem: a review  

Microsoft Academic Search

This paper reviews the available knowledge on sedimentology, hydrodynamics and five major ecosystem components (microphytobenthos, vascular plants, terrestrial arthropods, zoobenthos, and avifauna) of Belgian sandy beaches. It covers the area from the foredunes to the lower foreshore, takes an ecosystem approach to beaches of this specific geographic area. Morphodynamically, Bel- gian beaches are (ultra-)dissipative, macrotidal, and wide. Characteristic grain sizes

Jeroen Speybroeck; Dries Bonte; Wouter Courtens; Tom Gheskiere; Patrick Grootaert; Jean-Pierre Maelfait; Sam Provoost; Koen Sabbe; Eric W. M. Stienen; Vera Van Lancker; Wouter Van Landuyt; Magda Vincx; Steven Degraer

2008-01-01

121

Radiological Habits Survey: Cumbrian coast beach occupancy,  

E-print Network

Radiological Habits Survey: Cumbrian coast beach occupancy, 2009 2010 Cefas contract report C3635 Environment Report RL 01/10 #12;1 Environment Report RL 01/10 Radiological Habits Survey: Cumbrian coast beach. Survey area 9 Map 1 The Cumbrian coast beach occupancy survey area 10 3.1 General observations 11 3

122

Radiological Habits Survey: Sellafield Beach Occupancy, 2007  

E-print Network

Radiological Habits Survey: Sellafield Beach Occupancy, 2007 Environment Report RL 02/08 Customer: Sellafield Beach Occupancy, 2007 Centre for Environment, Fisheries & Aquaculture Science Lowestoft Laboratory to Seamill 12 4.2.1 Beach description 12 4.2.2 Activities 13 4.3 Seamill Lane to Coulderton and Nethertown 15

123

City of Manhattan Beach Community Development  

E-print Network

City of Manhattan Beach Community Development Phone: (310) 802-5500 FAX: (310) 802-5501 TDD: (310 Sacramento, Ca. 95814 Attention: Joe Loyer j mloycr@cncrgy.stalc.ca.us Subject: City of Manhattan Beach the City of Manhattan Beach adoption of our local more stringent energy efficiency standards. In accordance

124

Week 14, Surfing It Is Smaills Beach  

E-print Network

Week 14, Surfing It Is Smaills Beach One of the things that I had hoped to be able to do while I enjoy swimming at the beach; the ocean is cold this far south, even in summer. Over the past couple to go out for an hour before school. And we also have two body boards, so going to the beach is now

Bardsley, John

125

Impact of a microphallid trematode on the behaviour and survival of its isopod intermediate host: phylogenetic inheritance?  

PubMed

The extent to which the ability of parasites to alter host behaviour is phylogenetically inherited as opposed to independently evolved has received little attention. We investigated the impact of an undescribed species of Microphallus on the behaviour and survival of its host, the freshwater isopod Austridotea annectens, to determine if it produced effects comparable to those induced by other trematodes of this genus. There was no difference between the vertical distribution and responses to light of infected isopods and those of uninfected isopods. In contrast, we found that infected isopods were more active swimmers than uninfected isopods, and that they failed to show the evasive responses shown by uninfected isopods when exposed to a simulated predator. There was no detectable effect of Microphallus infection on isopod survival, however. Overall, our results provide no strong evidence that the behavioural manipulation shown by our Microphallus species and that displayed by the well-studied Microphallus papillorobustus are inherited from a common ancestor rather than independently derived. PMID:15997403

Hansen, Ellen K; Poulin, Robert

2005-10-01

126

Inside the "Long Beach Way"  

ERIC Educational Resources Information Center

This article features Long Beach Unified School District, the 2003 winner of a prestigious prize in urban education. The district of more than 90,000 students is the first winner of the award to return to the competition as a finalist. Its reappearance on the list after earning the prize in 2003 raises interesting questions about how districts…

Olson, Lynn

2007-01-01

127

Isopods Failed to Acclimate Their Thermal Sensitivity of Locomotor Performance during Predictable or Stochastic Cooling  

PubMed Central

Most organisms experience environments that vary continuously over time, yet researchers generally study phenotypic responses to abrupt and sustained changes in environmental conditions. Gradual environmental changes, whether predictable or stochastic, might affect organisms differently than do abrupt changes. To explore this possibility, we exposed terrestrial isopods (Porcellio scaber) collected from a highly seasonal environment to four thermal treatments: (1) a constant 20°C; (2) a constant 10°C; (3) a steady decline from 20° to 10°C; and (4) a stochastic decline from 20° to 10°C that mimicked natural conditions during autumn. After 45 days, we measured thermal sensitivities of running speed and thermal tolerances (critical thermal maximum and chill-coma recovery time). Contrary to our expectation, thermal treatments did not affect the thermal sensitivity of locomotion; isopods from all treatments ran fastest at 33° to 34°C and achieved more than 80% of their maximal speed over a range of 10° to 11°C. Isopods exposed to a stochastic decline in temperature tolerated cold the best, and isopods exposed to a constant temperature of 20°C tolerated cold the worst. No significant variation in heat tolerance was observed among groups. Therefore, thermal sensitivity and heat tolerance failed to acclimate to any type of thermal change, whereas cold tolerance acclimated more during stochastic change than it did during abrupt change. PMID:21698113

Schuler, Matthew S.; Cooper, Brandon S.; Storm, Jonathan J.; Sears, Michael W.; Angilletta, Michael J.

2011-01-01

128

ADAPTIVE FEATURES OF GUT STRUCTURE AND DIGESTIVE PHYSIOLOGY IN THE TERRESTRIAL ISOPOD PHILOSCIA MUSCORUM (SCOPOLI) 1763  

Microsoft Academic Search

The alimentary canal of isopod crustaceans is comparable to that of most other Arthropoda in that three basic regions can be recognized. These are the foregut, derived from the ectodermal stomodaeum and consisting of an oesophagus and pro ventriculus, the endodermal midgut, and an ectodermal hindgut derived from the proctodaeum (Goodrich, 1939) . The midgut, though, is unusual in that

MARK HASSALL; J. B. JENNINGS

1975-01-01

129

Toxicity of abamectin to the terrestrial isopod Porcellio scaber (Isopoda, Crustacea).  

PubMed

To determine effects of the antiparasitic veterinary drug abamectin on the isopod Porcellio scaber, animals were exposed for 21 days to Lufa 2.2 soil spiked at concentrations of 3-300 mg/kg dry soil. After exposure, abamectin residues in the isopods were analysed using a novel analytical method. Toxicity was evaluated on different levels of biological organisation: biochemical, cellular and the individual organism. Measurements included glutathione S-transferase (GST) activity and stability of cell membranes in the digestive gland, animal mass gain or loss, food consumption, behaviour and mortality. LC50 for the effect of abamectin on survival of P. scaber was 71 mg/kg dry soil. The most obvious sublethal effects were reduced food consumption and decreased body mass (NOEC 3 mg/kg dry soil). Additionally, loss of digging activity and reduced GST activity (NOEC 30 mg/kg dry soil) and cell membrane destabilization (NOEC 10 mg/kg dry soil) were recorded. Abamectin only slightly accumulated in the isopods, with bioaccumulation factors always being <0.1. Based on these results and current information on environmental levels of abamectin, it is not likely that isopods will be affected by abamectin, but further studies with exposure through faeces are recommended. PMID:20217223

Kolar, Lucija; Jemec, Anita; van Gestel, Cornelis A M; Valant, Janez; Hrzenjak, Rok; Erzen, Nevenka Kozuh; Zidar, Primoz

2010-06-01

130

Intraspecific variation of life history parameters in the terrestrial isopod, Armadillidium vulgare  

Microsoft Academic Search

Individual populations of the terrestrial isopod, Armadillidium vulgare, were studied in three Texas coastal prairie habitats: Chinese tallow forest, oak forest, and a Baccharis-grassland area. Time-specific life tables were compared for each population to determine intraspecific variation in life history parameters. Survivorship was greatest in the Baccharis area but density was lower and fluctuated less in this area than in

Ross H. Miller; Guy N. Cameron

1983-01-01

131

Adaptive variation in offspring size in the terrestrial isopod, Armadillidium vulgare  

Microsoft Academic Search

Variation in the birth size of offspring of the terrestrial isopod, Armadillidium vulgare, was observed in laboratory experiments and in field populations. In the laboratory, larger offspring were produced when the mother's food supply was reduced. In field populations, larger offspring were produced during the summer, a period of reduced food availability. Smaller offspring are produced in the spring, when

M. S. Brody; L. R. Lawlor

1984-01-01

132

Natural and experimental associations of Caenorhabditis remanei with Trachelipus rathkii and other terrestrial isopods  

Microsoft Academic Search

Summary - Caenorhabditis remanei was found in association with the terrestrial isopod Trachelipus rathkii at several wooded locations in southwestern Ohio. These associations were as developmentally arrested dauer larvae. The sites of association were the inner surfaces of the dorsal plates and ventral appendages. C. remanei associations also were observed with Armadillidium nasatum, Cylisticus convexus, and Porcellio scaber. They were

Scott Everet Baird

1999-01-01

133

Evidence for widespread Wolbachia infection in isopod crustaceans: molecular identification and host feminization.  

PubMed Central

Wolbachia are maternally inherited, intracellular, alpha proteobacteria that infect a wide range of arthropods. They cause three kinds of reproductive alterations in their hosts: cytoplasmic incompatibility, parthenogenesis and feminization. There have been many studies of the distribution of Wolbachia in arthropods, but very few crustacean species are known to be infected. We investigated the prevalence of Wolbachia in 85 species from five crustacean orders. Twenty-two isopod species were found to carry these bacteria. The bacteria were found mainly in terrestrial species, suggesting that Wolbachia came from a continental environment. The evolutionary relationships between these Wolbachia strains were determined by sequencing bacterial genes and by interspecific transfers. All the bacteria associated with isopods belonged to the Wolbachia B group, based on 16S rDNA sequence data. All the terrestrial isopod symbionts in this group except one formed an independent clade. The results of interspecific transfers show evidence of specialization of Wolbachia symbionts to their isopod hosts. They also suggest that host species plays a more important role than bacterial phylogeny in determining the phenotype induced by Wolbachia infection. PMID:9684374

Bouchon, D; Rigaud, T; Juchault, P

1998-01-01

134

Effects of predation risk on population variation in adult size in a stream-dwelling isopod  

Microsoft Academic Search

I used a combination of laboratory experiments and field surveys to examine the role that population-specific predation risk may play in shaping the life history strategy of a stream-dwelling isopod Lirceus fontinalis. Two focal populations were identified that were exposed to different predator types. The first population was exposed to larvae of the streamside salamander (Ambystoma barbouri) and the second

Timothy C. Sparkes

1996-01-01

135

Host preference and specialization in Gnathia sp., a common parasitic isopod of coral reef fishes  

E-print Network

ectoparasites of coral reef fishes) from the Great Barrier Reef, Australia, was allowed to choose among fishes Great Barrier Reef (GBR), and nearby Queensland coast have been described (Holdich & Harrison, 1980Host preference and specialization in Gnathia sp., a common parasitic isopod of coral reef fishes L

Grutter, Alexandra "Lexa"

136

Effect of introduced exotic tree litter on consumption patterns of the introduced exotic isopod Armadillidium vulgare  

Microsoft Academic Search

The feeding preferences and consumption rates of the exotic woodlouse Armadillidium vulgare were measured on litters from the autochthonous Rio Grande cottonwood and the exotic Russian olive. When offered a choice between five litter types (green and shed leaves of Russian olive and cottonwood, and fruits of Russian olive), the isopods consumed more of the exotic plant litter (green leaves

Manuela Abelho; Manuel C. Molles Jr.

2009-01-01

137

Isopods failed to acclimate their thermal sensitivity of locomotor performance during predictable or stochastic cooling.  

PubMed

Most organisms experience environments that vary continuously over time, yet researchers generally study phenotypic responses to abrupt and sustained changes in environmental conditions. Gradual environmental changes, whether predictable or stochastic, might affect organisms differently than do abrupt changes. To explore this possibility, we exposed terrestrial isopods (Porcellio scaber) collected from a highly seasonal environment to four thermal treatments: (1) a constant 20°C; (2) a constant 10°C; (3) a steady decline from 20° to 10°C; and (4) a stochastic decline from 20° to 10°C that mimicked natural conditions during autumn. After 45 days, we measured thermal sensitivities of running speed and thermal tolerances (critical thermal maximum and chill-coma recovery time). Contrary to our expectation, thermal treatments did not affect the thermal sensitivity of locomotion; isopods from all treatments ran fastest at 33° to 34°C and achieved more than 80% of their maximal speed over a range of 10° to 11°C. Isopods exposed to a stochastic decline in temperature tolerated cold the best, and isopods exposed to a constant temperature of 20°C tolerated cold the worst. No significant variation in heat tolerance was observed among groups. Therefore, thermal sensitivity and heat tolerance failed to acclimate to any type of thermal change, whereas cold tolerance acclimated more during stochastic change than it did during abrupt change. PMID:21698113

Schuler, Matthew S; Cooper, Brandon S; Storm, Jonathan J; Sears, Michael W; Angilletta, Michael J

2011-01-01

138

Three abdominal parasitic isopods (Isopoda: Epicaridea: Bopyridae: Athelginae) on hermit crabs from China and Hong Kong  

Microsoft Academic Search

Three bopyrid isopods of the subfamily Athelginae parasitizing hermit crabs collected in Chinese waters are discussed and described in this paper. Athelges takanoshimensis Ishii, 1914 is recorded again from China on Pagurus pectinatus (Stimpson) and from Hong Kong on a new host, Pagurus minutus Hess. Parathelges enoshimensis Shiino, 1950 is recorded for the first time from China on a member

Jianmei An; Jason D. Williams; Haiyan Yu

2011-01-01

139

Are foraminifers (Protozoa) important food for small isopods (Crustacea) in the deep sea?  

NASA Astrophysics Data System (ADS)

Gut contents of three small (<6 mm) species of munnopsid asellote isopod crustaceans ( Echinozone arctica, Ilyarachna bergendali and I. torleivi) from bathyal depths in the Nordic Seas were examined. The species feed mainly on benthic foraminifers, and their gut contents reflect the functional capability of the mouthparts in partitioning the food. Fragments of small and fragile calcareous foraminifer protozoans and small hard agglutinating foraminifers were most important in the guts of Echinozone arctica, which has rounded mandibular molar process, suited for crunching the foraminifers. Dark- and light-gray stercomata (foraminifer fecal pellets) from soft agglutinating foraminifers were most important in the guts of Ilyarachna bergendali, whose molar process has a wide crunching cusp and a sharp cutting edge. The gut contents of Ilyarachna torleivi were similar to the contents of I. bergendali, but differed somewhat from those of E. arctica. The results indicate that foraminiferivory may be common among small munnopsid asellote isopods and that the isopods may specialize in certain foraminifer species or genera. The strength of the foraminifer test may be an important aid against predation. This study indicates that small, yet poorly known, soft-shelled and agglutinating foraminifers with a low nutritional value may be important as food for deep-water isopods and that foraminifers may be an important link between phytodetritus and the macrofauna.

Gudmundsson, Gudmundur; von Schmalensee, Menja; Svavarsson, Jörundur

2000-11-01

140

Morphology, morphometry and ultrastructure of the maxillary gland of the terrestrial isopod Porcellio scaber (Crustacea, Oniscidea)  

Microsoft Academic Search

The ultrastructure of the maxillary gland of the terrestrial isopod Porcellio scaber is described. The gland is composed of an end sac, an excretory duct and a terminal duct which opens by a valve at the base of maxilla 2. An epithelium of podocytes in the end sac enables passive ultrafiltration by haemolymph pressure. The excretory duct shows ultrastructural adaptations

W. Kobusch

1994-01-01

141

Light and electron microscopy of the hepatopancreas of the isopod Acellus intermedius  

Microsoft Academic Search

Hepatopancreas from Acellus intermedius, a small freshwater isopod, was examined by light and electron microscopy. Of particular interest are the two cell types present in the hepatopancreas. Their ultrastructural features indicate that the major role of the large alpha cells is to absorb material from the lumen as well as secrete materials into the lumen while the major role of

J. M. Smith; M. J. Nadakavukaren; H. R. Hetzel

1975-01-01

142

Diel variation in ammonia excretion, glutamine levels, and hydration status in two species of terrestrial isopods  

Microsoft Academic Search

Terrestrial isopods (suborder Oniscidea) excrete most nitrogen diurnally as volatile ammonia, and ammonia-loaded animals accumulate nonessential amino acids, which may constitute the major nocturnal nitrogen pool. This study explored the relationship between ammonia excretion, glutamine storage\\/mobilization, and water balance, in two sympatric species Ligidium lapetum (section Diplocheta), a hygric species; and Armadillidium vulgare (Section Crinocheta), a xeric species capable of

Jonathan C. Wright; Mariasol Peña-Peralta

2005-01-01

143

Atmospheric Water Absorption and the Water Budget of Terrestrial Isopods (Crustacea, Isopoda, Oniscidea)  

Microsoft Academic Search

Studies of terrestrial isopods (Crustacea, Iso- poda, Oniscidea) have revealed a capacity for active water vapor absorption (WVA) in the taxonomic sections Cri- nocheta and Diplocheta but not in Synocheta. Uptake thresholds in Crinocheta are modest by comparison with other vapor absorbers, but standardized uptake fluxes are among the highest recorded and are probably an adaptive requirement to counter the

JONATHAN C. WRIGHT; JOHN MACHIN

1993-01-01

144

Genetic and environmental variation in performance of a marine isopod: effects of eutrophication  

Microsoft Academic Search

Environmental variation in food resources modifies performance of herbivores, in addition to genetic variation and maternal effects. In marine benthic habitats, eutrophication may modify herbivores’ diets by changing host species composition or nutritional quality of algae for herbivores. We studied experimentally the effects of diet breadth and nutrient availability for the host algae on fitness components of the herbivorous isopod

Anne Hemmi; Veijo Jormalainen

2004-01-01

145

Are foraminifers (Protozoa) important food for small isopods (Crustacea) in the deep sea?  

Microsoft Academic Search

Gut contents of three small (<6mm) species of munnopsid asellote isopod crustaceans (Echinozone arctica, Ilyarachna bergendali and I. torleivi) from bathyal depths in the Nordic Seas were examined. The species feed mainly on benthic foraminifers, and their gut contents reflect the functional capability of the mouthparts in partitioning the food. Fragments of small and fragile calcareous foraminifer protozoans and small

Gudmundur Gudmundsson; Menja von Schmalensee; Jörundur Svavarsson

2000-01-01

146

Diel ontogenetic shift in parasitic activity in a gnathiid isopod on Caribbean coral reefs  

Microsoft Academic Search

Ontogenetic niche shifts are characteristic of organisms with complex life cycles such as many marine invertebrates. Research has focused primarily on changes in habitat or diet. However, ontogenetic changes can also occur in the temporal pattern of foraging. Gnathiid isopods feed on fish blood throughout their larval stages and are the primary food item for cleaning organisms on coral reefs.

P. C. Sikkel; R. E. Ziemba; W. T. Sears; J. C. Wheeler

2009-01-01

147

Reproductive anatomy, precopulatory mate guarding, and paternity in the socorro isopod, thermosphaeroma thermophilum  

Microsoft Academic Search

We examine the reproductive anatomy of both sexes of the isopod Thermosphaeroma thermo?philum using SEM and light microscopy, and study the occurrence of multiple paternity using allozyme electrophoresis. Female reproductive openings are found ventrally, under the cuticular plate covering the body between the fifth and seventh pereonites. Receptivity for copulation is short during the sexual moult. Sperm from copulation are

Veijo Jormalainen; Stephen M. Shuster; Herbert C. Wildey

1999-01-01

148

TEST OF CRITERIA FOR INTRODUCED SPECIES: THE GLOBAL INVASION BY THE ISOPOD SYNIDOTEA LAEVIDORDALIS (MEIRS 1881)  

EPA Science Inventory

Criteria for distinguishing introduced from endemic peracaridan crustaceans were used to deduce that a human-borne global invasion by the Oriental isopod Synidotea laevidorsalis (Meirs 1881) has occurred in the past 100 years. hese criteria concern the ecological, evolutionary, a...

149

Assemblages of terrestrial isopods (Isopoda, Oniscidea) in a fragmented forest landscape in Central Europe.  

PubMed

Terrestrial isopods were collected in 13 forest fragments differing in area (within the range of 0.1 and 254.5 ha), shape and composition of forest vegetation (thermophilous oak, mesophilous oak-hornbeam, thermophilous oak-hornbeam, acidophilous oak, basiphilous oak, beech oak-hornbeam, moist mixed deciduous forest, plantations of deciduous and coniferous trees), all situated in the ?eský kras Protected Landscape Area, Czech Republic, Central Europe. Number of sites sampled in each fragment of forest depended on its size and ranged from 1 to 7. Altogether 30 sites were sampled. Soil samples (5 per site collected twice a year) and pitfall trapping (5 traps per site in continuous operation throughout a year) during 2008-2009 yielded a total of 14 species of terrestrial isopods. The highest densities and highest epigeic activities of terrestrial isopods were recorded in the smallest fragments of woodland. Although a wider range of habitats were sampled in the larger fragments of woodland there was not a greater diversity of species there and the population densities and epigeic activities recorded there were lower. Porcellium collicola was most abundant in small fragments of woodland regardless the vegetation there. Armadillidium vulgare and Protracheoniscus politus were statistically more abundant in the larger fragments of woodland. The results indicate that forest fragmentation does not necessarily result in a decrease in the species richness of the isopod assemblages in such habitats. PMID:22536108

Tajovský, Karel; Hošek, Jan; Hofmeister, Je?ýk; Wytwer, Jolanta

2012-01-01

150

Assemblages of terrestrial isopods (Isopoda, Oniscidea) in a fragmented forest landscape in Central Europe  

PubMed Central

Abstract Terrestrial isopods were collected in 13 forest fragments differing in area (within the range of 0.1 and 254.5 ha), shape and composition of forest vegetation (thermophilous oak, mesophilous oak-hornbeam, thermophilous oak-hornbeam, acidophilous oak, basiphilous oak, beech oak-hornbeam, moist mixed deciduous forest, plantations of deciduous and coniferous trees), all situated in the ?eský kras Protected Landscape Area, Czech Republic, Central Europe. Number of sites sampled in each fragment of forest depended on its size and ranged from 1 to 7. Altogether 30 sites were sampled. Soil samples (5 per site collected twice a year) and pitfall trapping (5 traps per site in continuous operation throughout a year) during 2008–2009 yielded a total of 14 species of terrestrial isopods. The highest densities and highest epigeic activities of terrestrial isopods were recorded in the smallest fragments of woodland. Although a wider range of habitats were sampled in the larger fragments of woodland there was not a greater diversity of species there and the population densities and epigeic activities recorded there were lower. Porcellium collicola was most abundant in small fragments of woodland regardless the vegetation there. Armadillidium vulgare and Protracheoniscus politus were statistically more abundant in the larger fragments of woodland. The results indicate that forest fragmentation does not necessarily result in a decrease in the species richness of the isopod assemblages in such habitats. PMID:22536108

Tajovsky, Karel; Hosek, Jan; Hofmeister, Jenyk; Wytwer, Jolanta

2012-01-01

151

Virtual Beach 3: user's guide  

USGS Publications Warehouse

Virtual Beach version 3 (VB3) is a decision support tool that constructs site-specific statistical models to predict fecal indicator bacteria (FIB) concentrations at recreational beaches. VB3 is primarily designed for beach managers responsible for making decisions regarding beach closures or the issuance of swimming advisories due to pathogen contamination. However, researchers, scientists, engineers, and students interested in studying relationships between water quality indicators and ambient environmental conditions will find VB3 useful. VB3 reads input data from a text file or Excel document, assists the user in preparing the data for analysis, enables automated model selection using a wide array of possible model evaluation criteria, and provides predictions using a chosen model parameterized with new data. With an integrated mapping component to determine the geographic orientation of the beach, the software can automatically decompose wind/current/wave speed and magnitude information into along-shore and onshore/offshore components for use in subsequent analyses. Data can be examined using simple scatter plots to evaluate relationships between the response and independent variables (IVs). VB3 can produce interaction terms between the primary IVs, and it can also test an array of transformations to maximize the linearity of the relationship The software includes search routines for finding the "best" models from an array of possible choices. Automated censoring of statistical models with highly correlated IVs occurs during the selection process. Models can be constructed either using previously collected data or forecasted environmental information. VB3 has residual diagnostics for regression models, including automated outlier identification and removal using DFFITs or Cook's Distances.

Cyterski, Mike; Brooks, Wesley; Galvin, Mike; Wolfe, Kurt; Carvin, Rebecca; Roddick, Tonia; Fienen, Mike; Corsi, Steve

2014-01-01

152

Habitat-specific pigmentation in a freshwater isopod: adaptive evolution over a small spatiotemporal scale.  

PubMed

Pigmentation in the freshwater isopod Asellus aquaticus (Crustacea) differed between habitats in two Swedish lakes. In both lakes, isopods had lighter pigmentation in stands of submerged vegetation, consisting of stoneworts (Chara spp.), than in nearby stands of reed (Phragmites australis). Experimental crossings of light and dark isopods in a common environment showed that pigmentation had a genetic basis and that genetic variance was additive. Environmental effects of diet or chromatophore adjustment to the background had minor influence on pigmentation, as shown by laboratory rearing of isopods on stonewort or reed substrates, as well as analyses of stable isotope ratios for isopods collected in the field. In both study lakes, the average phenotype became lighter with time (across generations) in recently established stonewort stands. Taken together, these results indicate that altered phenotype pigmentation result from evolutionary responses to local differences in natural selection. Based on the assumption of two generations per year, the evolutionary rate of change in pigmentation was 0.08 standard deviations per generation (haldanes) over 20 generations in one lake and 0.22 haldanes over two generations in the other lake. This genetic change occurred during an episode of population growth in a novel habitat, a situation known to promote adaptive evolution. In addition, stonewort stands constitute large and persistent patches, characteristics that tend to preserve local adaptations produced by natural selection. Results from studies on selective forces behind the adaptive divergence suggest that selective predation from visually oriented predators is a possible selective agent. We found no indications of phenotype-specific movements between habitats. Mating within stonewort stands was random with respect to pigmentation, but on a whole-lake scale it is likely that mating is assortative, as a result of local differences in phenotype distribution. PMID:15058721

Hargeby, Anders; Johansson, Jonas; Ahnesjö, Jonas

2004-01-01

153

A Complex Evolutionary History in a Remote Archipelago: Phylogeography and Morphometrics of the Hawaiian Endemic Ligia Isopods  

E-print Network

restricted to specific coastal patchy habitats, however, have the potential for high levels of allopatric diversification. This is the case of Ligia isopods endemic to the Hawaiian Archipelago, which most likely arose from a rocky supralittoral ancestor...

Santamaria, Carlos A.; Mateos, Mariana; Taiti, Stefano; DeWitt, Thomas J.; Hurtado, Luis A.

2013-12-30

154

Long-term toxicity of five polycyclic aromatic hydrocarbons for the terrestrial isopods Oniscus asellus and Porcellio scaber  

Microsoft Academic Search

Polycyclic aromatic hydrocarbons (PAHs) are a common component of soil pollution, yet little is known of the ecotoxicological risks these compounds may pose to life in soil. This article reports the ecotoxicity of five PAHs for two terrestrial isopod species. Isopods were exposed to food contaminated with four different concentrations of either fluorene, phenanthrene, fluoranthene (up to 4 μmol\\/g), benz[a]anthracene,

Timco C. van Brummelen; Cornelis A. M. van Gestel; Rudo A. Verweij

1996-01-01

155

Morphological variation in the giant isopod Bathynomus giganteus (suborder Flabellifera: family Cirolanidae) with notes on the genus  

E-print Network

MORPHOLOGICAL VARIATION IN THE GIANT ISOPOD BAIHYNOMUS GIGANTEUS (SUBORDER FLABELLIFERA: FAMILY CIROLANIDAE) WITH NOTES ON THE GENUS. A Thesis by BRIAN THOMAS COCKE Submitted to the Graduate College of Texas ASM University in partial... fulfillment of the requirements for the degree of MASTER OF SCIENCE August 1987 Maj or Subj ect: Zoology MORPHOLOGICAL VARIATION IN THE GIANT ISOPOD BATHYNOMUS GIGANTEUS (SUBORDER FLABELLIFERA: FAMILY CIROLANIDAE) WITH NOTES ON THE GENUS. A Thesis...

Cocke, Brian Thomas

2012-06-07

156

Brain anatomy of the marine isopod Saduria entomon Linnaeus, 1758 (Valvifera, Isopoda) with special emphasis on the olfactory pathway.  

PubMed

Representatives of at least six crustacean taxa managed to establish a terrestrial life style during their evolutionary history and the Oniscidea (Isopoda) are currently held as the most successfully terrestrialized malacostracan crustaceans. The brain architecture of terrestrial isopods is fairly well understood and studies on this field suggest that the evolutionary transition from sea to land in isopods coincided with a considerable size reduction and functional loss of their first pair of antennae and associated brain areas. This finding suggests that terrestrial isopods may have no or poor abilities to detect volatile substances but that their chemosensory ecology is most likely restricted to contact chemoreception. In this study, we explored how the brain of a marine isopod and particularly its olfactory system compares to that of terrestrial relatives. Using histochemical and immunohistochemical labeling, brightfield and confocal laser-scan microscopy, we show that in the marine isopod Saduria entomon aesthetascs on the first pair of antennae provide input to a well defined deutocerebrum (DC). The deutocerebral chemosensory lobes (DCL) are divided into spherical neuropil compartments, the olfactory glomeruli (og). Secondary processing areas in the lateral protocerebrum (lPC) are supplied by a thin but distinct projection neuron tract (PNT) with a contralateral connection. Hence, contrary to terrestrial Isopoda, S. entomon has at least the neuronal substrate to perceive and process olfactory stimuli suggesting the originally marine isopod lineage had olfactory abilities comparable to that of other malacostracan crustaceans. PMID:24109435

Kenning, Matthes; Harzsch, Steffen

2013-01-01

157

Brain anatomy of the marine isopod Saduria entomon Linnaeus, 1758 (Valvifera, Isopoda) with special emphasis on the olfactory pathway  

PubMed Central

Representatives of at least six crustacean taxa managed to establish a terrestrial life style during their evolutionary history and the Oniscidea (Isopoda) are currently held as the most successfully terrestrialized malacostracan crustaceans. The brain architecture of terrestrial isopods is fairly well understood and studies on this field suggest that the evolutionary transition from sea to land in isopods coincided with a considerable size reduction and functional loss of their first pair of antennae and associated brain areas. This finding suggests that terrestrial isopods may have no or poor abilities to detect volatile substances but that their chemosensory ecology is most likely restricted to contact chemoreception. In this study, we explored how the brain of a marine isopod and particularly its olfactory system compares to that of terrestrial relatives. Using histochemical and immunohistochemical labeling, brightfield and confocal laser-scan microscopy, we show that in the marine isopod Saduria entomon aesthetascs on the first pair of antennae provide input to a well defined deutocerebrum (DC). The deutocerebral chemosensory lobes (DCL) are divided into spherical neuropil compartments, the olfactory glomeruli (og). Secondary processing areas in the lateral protocerebrum (lPC) are supplied by a thin but distinct projection neuron tract (PNT) with a contralateral connection. Hence, contrary to terrestrial Isopoda, S. entomon has at least the neuronal substrate to perceive and process olfactory stimuli suggesting the originally marine isopod lineage had olfactory abilities comparable to that of other malacostracan crustaceans. PMID:24109435

Kenning, Matthes; Harzsch, Steffen

2013-01-01

158

Valuing Recreation and Amenities at San Diego County Beaches  

Microsoft Academic Search

Policymakers and analysts concerned with coastal issues often need economic value information to evaluate policies that affect beach recreation. This paper presents economic values associated with beach recreation in San Diego County generated from a recreation demand model that explains a beach user's choice of which beach to visit. These include estimates of the economic values of a beach day,

DANIEL K. LEW; DOUGLAS M. LARSON

2005-01-01

159

Huntington Beach offshore Parcel 14  

Microsoft Academic Search

Parcel 14 of the Huntington Beach Oil Field (California) is located down the west plunge of a large east-west-trending asymmetrical anticlinal structure. This offshore structure extends from the shore westward approximately 3 miles. The south flank of the anticline is steep-dipping with known dips up to 65°. The north flank has an average dip of 10$. Faulting is minor on

1966-01-01

160

1250 BELLFLOWER BOULEVARD, LONG BEACH, CA 90840 CALIFORNIA STATE UNIVERSITY, LONG BEACH  

E-print Network

KKJZ AS HC 1250 BELLFLOWER BOULEVARD, LONG BEACH, CA 90840 CALIFORNIA STATE UNIVERSITY, LONG BEACH PA SRM FND HRL IPCDC LIB MLSC PP/CMREC WHSE RH1 RH4 RH5 RH3 RH2 SH MMC VEC SLH BEACH DRIVE 1 = Apprx.500 Steps Beach Striders Campus Tour · 2.35 miles · apprx.4700 steps #12;KKJZ AS HC 1250 BELLFLOWER

Sorin, Eric J.

161

2008 VIRGINIA BEACH TOURISM ECONOMIC IMPACT STUDY  

E-print Network

2008 VIRGINIA BEACH TOURISM ECONOMIC IMPACT STUDY by Gilbert R. Yochum, Ph.D. gyochum University Research Foundation Norfolk, Virginia 23529 (757) 683 May 2009 2008 VIRGINIA BEACH TOURISM¼¼¼¼¼¼¼¼¼¼¼¼¼¼¼¼¼¼¼¼¼¼¼¼¼¼¼¼¼ 2008 Virginia Beach Visitor Annual Summary Direct City Taxes and Fees

162

Caribbean beach changes and climate change adaptation  

Microsoft Academic Search

Beach monitoring data are presented and show an average beach erosion trend of 0.5 m yr in eight Caribbean islands over the period 1985–2000, with elevated rates in those islands impacted by a higher number of hurricanes. The data are based on 5 to 15 years of continuous monitoring, conducted at three-month intervals, at 113 beaches (200 profile sites) on

Gillian Cambers

2009-01-01

163

An energy?mobility beach classification system as a basis for the management of beach resources  

Microsoft Academic Search

The successful implementation of structural and nonstructural solution to problems of shoreline erosion is greatly facilitated if the accumulation and analysis of data sets are accomplished within a design framework which has both theoretical validity and practical application. An inventory of beach resources based upon breaking?wave energy and beach mobility is presented as a basis for a beach classification system.

Karl F. Nordstrom

1979-01-01

164

VISUAL BEACH: SOFTWARE FOR ACHIEVING BEACH AESTHETIC AND PUBLIC HEALTH PROTECTION  

EPA Science Inventory

The Beaches Environmental Assessment and Coastal Health Act of 2000 directs the EPA to assure that 100% of significant public beaches are managed by 2008. Under the Act EPA is developing a program to monitor beach water quality and strategies for timely notification of the public...

165

Factors controlling beach changes of a Texas gulf coast beach  

E-print Network

of the old Brazos delta retreated 1000 feet since 1937, while the the shoreline of the new Brazos delta grew a comparable distance (Figures 7, 9 and Appendix 0). 1941: Hurricane tides of nine feet were recorded at the Freeport Jetties (Bodine, 3). 1942... National Ocean Survey) 21 beach profile than normal and caused high ebbing velocities at Brown Cedar Cut. 1946; Photographs by the U. S. Department of Agriculture of the new Brazos delta show the shoreline changed only an insignificant amount between...

Seelig, William Newton

2012-06-07

166

Episymbiotic microbes as food and defence for marine isopods: unique symbioses in a hostile environment  

PubMed Central

Symbioses profoundly affect the diversity of life, often through novel biochemical services that symbionts provide to their hosts. These biochemical services are typically nutritional enhancements and less commonly defensive, but rarely both simultaneously. On the coral reefs of Papua New Guinea, we discovered unique associations between marine isopod crustaceans (Santia spp.) and episymbiotic microbes. Transmission electron microscopy and pigment analyses show that episymbiont biomass is dominated by large (20–30??m) cyanobacterial cells. The isopods consume these photosymbionts and ‘cultivate’ them by inhabiting exposed sunlit substrates, a behaviour made possible by symbionts' production of a chemical defence that is repulsive to fishes. Molecular phylogenetic analyses demonstrated that the symbiotic microbial communities are diverse and probably dominated in terms of population size by bacteria and small unicellular Synechococcus-type cyanobacteria. Although largely unknown in the oceans, defensive symbioses probably promote marine biodiversity by allowing niche expansions into otherwise hostile environments. PMID:16024384

Lindquist, Niels; Barber, Paul H; Weisz, Jeremy B

2005-01-01

167

Microhabitat segregation and cannibalism in an endangered freshwater isopod, Thermosphaeroma thermophilum  

Microsoft Academic Search

Intraspecific microhabitat segregation is expected to arise when there are age- or sex-specific differences in predation risk.\\u000a The degree to which conspecific predation (cannibalism) can generate this risk, however, is poorly understood. In this paper,\\u000a we examine microhabitat use, cannibalism, and individual responses to the presence of conspecifics in Thermosphaeroma thermophilum, an endangered isopod crustacean species that is endemic to

Veijo Jormalainen; Stephen M. Shuster

1997-01-01

168

Characterization and cDNA Cloning of Androgenic Gland Hormone of the Terrestrial Isopod Armadillidium vulgare  

Microsoft Academic Search

The sex differentiation in crustaceans is known to be controlled by a peptide hormone called androgenic gland hormone (AGH). AGH was extracted and purified from the androgenic glands (AGs) of the male isopod Armadillidium vulgare by high-performance liquid chromatography. AGH consisted of two peptide chains and their N-terminal amino acid sequences were determined. A cDNA encoding AGH was cloned by

Atsuro Okuno; Yuriko Hasegawa; Tsuyoshi Ohira; Yasutosi Katakura; Hiromichi Nagasawa

1999-01-01

169

Cold adaptation of the terrestrial isopod, Porcellio scaber , to subnivean environments  

Microsoft Academic Search

The terrestrial isopod, Porcellio scaber, was susceptible to subzero temperature: both freezing and chilling were injurious. The level of cold hardiness against chilling and freezing showed different patterns in their seasonal variation. The lower lethal temperature causing 50% mortality, an indicator of the tolerance to chilling, ranged from-1.37°C in August to-4.58°C in December. The whole body supercooling point, the absolute

K. Tanaka; T. Udagawa

1993-01-01

170

Metabolism of 1-fluoropyrene and pyrene in marine flatfish and terrestrial isopods  

Microsoft Academic Search

Monofluorinated polycyclic aromatic hydrocarbons (F-PAHs) are useful reference compounds for a broad spectrum of PAH studies. The pyrene metabolite 1-hydroxypyrene is often used as a biomarker of PAH exposure. Two species, isopod (Porcellio scaber) and flatfish (Platichthys flesus), that produce 1-hydroxypyrene as the major intermediary metabolite and have distinct phase-II conjugates, were selected to investigate the cytochrome P450 catalyzed metabolism

Gregor Luthe; Gerard J Stroomberg; Freek Ariese; Udo A. Th Brinkman; Nico M van Straalen

2002-01-01

171

Trace metals in populations of freshwater isopods: Influence of biotic and abiotic variables  

Microsoft Academic Search

Trace metal levels in water, sediments and freshwater isopods from 28 different water systems in the Netherlands were measured during the period of 1986 to 1989. Distinct element-specific internal distribution patterns were present, with Cd and Cu stored mainly in the hepatopancreas (30–60% of total body burden) and Pb and Zn in the hindgut and exoskeleton with hemolymph. Mean whole-body

B. van Hattum; N. M. van Straalen; H. A. J. Govers

1996-01-01

172

Calcium translocations during the moulting cycle of the semiterrestrial isopod Ligia hawaiiensis (Oniscidea, Crustacea)  

Microsoft Academic Search

Terrestrial isopods moult first the posterior and then the anterior half of the body. During the moulting cycle they retain\\u000a a significant fraction of cuticular calcium partly by storing it in sternal CaCO3 deposits. We analysed the calcium content in whole Ligia hawaiiensis and the calcium distribution between the posterior, the anterior ventral, and the anterior dorsal cuticle during four

Andreas Ziegler; Monica Hagedorn; Gregory A. Ahearn; Thomas H. Carefoot

2007-01-01

173

Microscopical and functional aspects of calcium-transport and deposition in terrestrial isopods  

Microsoft Academic Search

Terrestrial isopods (Crustacea) are excellent model organisms to study epithelial calcium-transport and the regulation of biomineralization processes. They molt frequently and resorb cuticular CaCO3 before the molt to prevent excessive loss of Ca2+ ions when the old cuticle is shed. The resorbed mineral is stored in CaCO3 deposits within the ecdysial gap of the first four anterior sternites. After the

Andreas Ziegler; Helge Fabritius; Monica Hagedorn

2005-01-01

174

Natatory-stage cymothoid isopods: Description, molecular identification and evolution of attachment  

Microsoft Academic Search

Cymothoid isopods are parasites that have a biphasic life cycle comprised of free-swimming micropredatory stages that eventually attach permanently to fishes, on which they change sex and morphology. Thus, matching free-swimming and permanently attached life-history stages is difficult. We attempted to identify natatory-stage cymothoids by seeking matches of partial 16S rRNA gene sequences from these stages and described adult cymothoids.

Conor M. Jones; Terrence L. Miller; Alexandra S. Grutter; Thomas H. Cribb

2008-01-01

175

Female resistance and male preference in a stream-dwelling isopod: effects of female molt characteristics  

Microsoft Academic Search

In the stream-dwelling isopod, Lirceus fontinalis, mating contests between males and females occur prior to pair formation. We examined the relative contribution of male preference\\u000a and female resistance to contest outcomes. We first quantified male and female behavior during typical mating interactions\\u000a and examined the relationship between time until molt (TTM) and mating outcomes. We then examined the role of

Timothy C. Sparkes; Daniel P. Keogh; Kristin E. Haskins

2000-01-01

176

Light and electron microscopy of the hepatopancreas of the isopod Acellus intermedius.  

PubMed

Hepatopancreas from Acellus intermedius, a small freshwater isopod, was examined by light and electron microscopy. Of particular interest are the two cell types present in the hepatopancreas. Their ultrastructural features indicate that the major role of the large alpha cells is to absorb material from the lumen as well as secrete materials into the lumen while the major role of the small beta cells is to store the absorbed materials as well as break down stored materials before transport. PMID:1203957

Smith, J M; Nadakavukaren, M J; Hetzel, H R

1975-11-12

177

Diel ontogenetic shift in parasitic activity in a gnathiid isopod on Caribbean coral reefs  

Microsoft Academic Search

Ontogenetic niche shifts are characteristic of organisms with complex life cycles such as many marine invertebrates. Research\\u000a has focused primarily on changes in habitat or diet. However, ontogenetic changes can also occur in the temporal pattern of\\u000a foraging. Gnathiid isopods feed on fish blood throughout their larval stages and are the primary food item for cleaning organisms\\u000a on coral reefs.

P. C. Sikkel; R. E. Ziemba; W. T. Sears; J. C. Wheeler

2009-01-01

178

An experimental field test of host-finding mechanisms in a Caribbean gnathiid isopod  

Microsoft Academic Search

Field experiments were conducted from dusk to dawn off St. John (18° 18? 59.32? N, 64° 43? 24.5? W) and Guana Island (18°\\u000a 28? 28.31? N, 64° 34? 30.83? W), Virgin Islands from June through August 2008-2010 to assess the sensory cues used by the\\u000a nocturnal\\/crepuscular fish-parasitic gnathiid isopod, Gnathia marleyi, to locate fish hosts. Experimental traps providing both visual

Paul C. SikkelWhitney; Whitney T. Sears; Ben Weldon; Ben C. Tuttle

2011-01-01

179

Observations with a different approach to morphological colour variation in an isopod population (Crustacea: Isopoda)  

Microsoft Academic Search

Morphological colour variation in Idotea baltica basteri Audouin, 1827 (Isopoda: Crustacea) is reported for the first time on populations from a brackish water lake (Kucukcekmece\\u000a Lagoon) in Turkey. According to pigmentation characteristics, the isopods were described and sorted to ten different colour\\u000a morphs which are named as maculata, maculata-lineata, uniformis, uniformis-lineata, immaculatum, immaculatum-lineata, nigrum, nigrum-lineata, albafusca,\\u000a and albafusca-fasciatum. The similarity

Belgin Camur-Elipek

2009-01-01

180

75 FR 16201 - FPL Energy Point Beach, LLC; Point Beach Nuclear Plant, Units 1 and 2; Exemption  

Federal Register 2010, 2011, 2012, 2013

...NRC-2010-0123] FPL Energy Point Beach, LLC; Point Beach Nuclear Plant, Units 1 and 2; Exemption 1.0 Background FPL Energy Point Beach, LLC (FPLE...NRC) to M. S. Fertel (Nuclear Energy Institute) dated June...

2010-03-31

181

Effect of the parasitic isopod, Catoessa boscii (Isopoda, Cymothoidae), a buccal cavity parasite of the marine fish, Carangoides malabaricus  

PubMed Central

Objective To examine the effect of isopod parasite Catoessa boscii (C. boscii) on Carangoides malabaricus (C. malabaricus). Methods The host fish C. malabaricus infested by C. boscii were collected directly from the trawlers landed at Parangipettai coast during December 2008 to November 2009. Data regarding the total length, width, weight and sex of the host fish were recorded. Effect of infestation on C. malabaricus, the length and weight data were analysed and host specificity of isopods was also examined. Results During the sampling period, 585 C. malabaricus were examined. Among them, 218 specimens were found to carry 243 parasites. Three pairs of isopods (one male with one female) were recorded from the host fish and each pair was attached to the tongue in the buccal cavity of the host. Another pair was also found where the male and male, female and female isopod had settled on the tongue in the buccal cavity. Gross lesions observed in the buccal cavity of infested fish showed small pin-holes in the tongue region, through which dactyls of pereopod's penetrating claws dig into the host tissues. The maximum weight loss was reported in females (5.43%) than in males (3.75%) of C. malabaricus. Due to infestation of different isopod parasites in both male and female fish, the effects on the length-weight relationship of C. malabaricus were compared. The rate of increased growth in weight in uninfested female fish was found to be higher than that of the infested. The weight gain is faster in uninfested fish than in the infested fish. Conclusions From the above mentioned observations, it is clear that the worst of fish on account of the infestation of isopods are the C. malabaricus succumbed to the attack of isopod parasites. Although, the infestation did not cause immediate death, it had affected the normal growth of the host fish. PMID:23593590

Rameshkumar, Ganapathy; Ravichandran, Samuthirapandian

2013-01-01

182

Effects of ingested nano-sized titanium dioxide on terrestrial isopods (Porcellio scaber).  

PubMed

The effects of ingested nano-sized titanium dioxide (TiO2; anatase, 15 nm) on the terrestrial isopod Porcellio scaber (Isopoda, Crustacea) after short-term (3-d) dietary exposure were studied. Activities of antioxidant enzymes, such as catalase (CAT) and glutathione-S-transferase (GST), in digestive glands were affected in a dose-independent manner, but higher-level isopod endpoints, including weight change, feeding rate, food assimilation efficiency, and survival, were not affected up to the highest tested concentration of TiO2 in food (3,000 microg/g). Exposure concentrations of 0.5, 2,000, and 3,000 microg nonsonicated TiO2/g food decreased CAT and GST activities, but intermediate concentrations (1, 10, 100, and 1,000 microg/g food) did not result in significant changes of enzyme activities. When the dispersion of TiO2 was sonicated, no effects on enzyme activities or higher-level biomarkers were observed. The experimental setup with terrestrial isopods designed for dissolved chemicals also is suitable for testing the effects of ingested nanoparticles, but the presentation of toxicity data needs to be adapted according to the mode of action of the nanoparticles and their specific characteristics. PMID:19086208

Jemec, Anita; Drobne, Damjana; Remskar, Maja; Sepci?, Kristina; Tisler, Tatjana

2008-09-01

183

Effect of metal mixtures (Cd and Zn) on body weight in terrestrial isopods.  

PubMed

The aim of this study was to determine the effect of exposure to cadmium and zinc mixtures on the weight of terrestrial isopods. Experiments were conducted using uncontaminated specimens of P. laevis. The isopods were exposed to various concentrations of cadmium and zinc sulfate in single- and mixed-metal experiments. The mean weight of the unexposed isopods in the control group increased over the 6 weeks of observation. It was concluded that cadmium and zinc, administered separately, had a negative effect on the weight of P. laevis. The weight change (gain or loss) of P. laevis in the exposures to mixtures of cadmium and zinc sulfate were different from those of woodlice where Cd and Zn were administered separately. Combination of the lowest concentrations of Cd and Zn (20 and 1000 mg x kg(-1)) produced a stimulating effect compared to the control. Weight changes of the other two combinations of Cd and Zn (80/4000 and 160/8000 mg x kg(-1)) showed no differences from those of the control, and weight changes of woodlice exposed to Cd and Zn mixtures were mostly the same as those of the control over the 6-week exposure period. It can thus be concluded that mixtures of Cd and Zn have an antagonistic effect on each other in terms of weight of P. laevis. PMID:15195810

Odendaal, J P; Reinecke, A J

2004-04-01

184

Wolbachia infection in the terrestrial isopod oniscus asellus: sex ratio distortion and effect on fecundity  

PubMed

Maternally inherited Wolbachia bacteria are widespread in arthropods where they are responsible for various reproductive alterations. In terrestrial isopods (woodlice), Wolbachia may induce feminization or cytoplasmic incompatibility (CI), but their effect remains unknown in most host species. To increase our understanding of host/symbiont interactions in terrestrial isopods, the effect of Wolbachia was investigated in the oniscidean Oniscus asellus, mainly to discriminate between feminization and CI. The Wolbachia infection was not linked with a CI phenomenon, but females infected with Wolbachia produced female-biased broods compared with uninfected females. The fecundity of infected females was slightly lower than that of uninfected, but the number of young at the adult stage was similar between the two female categories. The experimental transfer of the symbiont into uninfected strains showed that Wolbachia was responsible for the feminization of a number of genetic males. In female-biased broods, Wolbachia were vertically transmitted to around 88% of the offspring, but the transmission rate was lower in the few male-biased progenies. The feminizing activity of these symbionts was not systematic, as many phenotypic males were infected. These results contrasted with what is known in another woodlouse species, and indicated that feminization has evolved in different ways in terrestrial isopods. PMID:10583549

Rigaud; Moreau; Juchault

1999-10-01

185

Rip Currents on a Cornish Beach  

Microsoft Academic Search

RIP currents have been measured at Holywell in West Cornwall, where a sandy beach is open to waves and swells from the Atlantic. A rip current is a narrow streak of water which flows seawards from the beach; it carries the return flow of the general shorewards transport of water produced by the breaking of waves. Such currents cause many

L. Draper; P. J. DOBSON

1965-01-01

186

Plastics and beaches: A degrading relationship  

Microsoft Academic Search

Plastic debris in Earth’s oceans presents a serious environmental issue because breakdown by chemical weathering and mechanical erosion is minimal at sea. Following deposition on beaches, plastic materials are exposed to UV radiation and physical processes controlled by wind, current, wave and tide action. Plastic particles from Kauai’s beaches were sampled to determine relationships between composition, surface textures, and plastics

Patricia L. Corcoran; Mark C. Biesinger; Meriem Grifi

2009-01-01

187

PREDICTING BACTERIAL CONCENTRATION ON THE NATION'S BEACHES  

EPA Science Inventory

A classical example of the failure of institutions and environmental technology to protect the nation's aesthetic, recreational, and public health values is represented by the July-August, 1999 Huntington Beach, California beach closure. This multi-million dollar regional public ...

188

Hydrodynamic variability on megatidal beaches, Normandy, France  

Microsoft Academic Search

Several experiments aimed at characterising the hydrodynamics of megatidal beaches outside the surf zone were carried out between 1990 and 1994 on the Cotentin coast of the Cherbourg Peninsula in Normandy. The database was established from the records of several electromagnetic current meters and pressure sensors and from field surveys. The mean spring tidal range on these beaches varies between

Franck Levoy; Olivier Monfort; Claude Larsonneur

2001-01-01

189

Effects of beach cast cleaning on beach quality, microbial food web, and littoral macrofaunal biodiversity  

NASA Astrophysics Data System (ADS)

At the end of the summer, drifting filamentous red algae cover shallow bottoms and accumulate in huge cast walls on the open shores of the non-tidal central Baltic Sea. The hypotheses that beach cleaning increases water clarity, decreases the organic content of the sand, and increases the species diversity in the shallow zone closest to the shore, were tested through field investigations and experiments. Cleaned shorelines were compared with un-cleaned shorelines at two sites with different intensity of beach cleaning in a rural area of SE Sweden. The results show that water clarity was significantly increased off the intensively cleaned beach but not off the moderately cleaned one. Similarly, the total leakage of nitrogenous compounds decreased off the intensively cleaned beach, but not off the moderately cleaned. The organic content of the sand was lower on both cleaned beaches compared with nearby un-cleaned beaches. The total animal biomass was significantly lower on the intensively cleaned beach compared with the un-cleaned beach, but the moderately cleaned beach gave no such effect. The difference in biodiversity and community structure between cleaned and un-cleaned beaches was insignificant. The most obvious difference in species composition was a much higher number of planktivore opossum shrimps of the genus Mysis and Praunus on the un-cleaned beaches. The bacterial production and the amount of ciliates larger than 20 mm were also higher on un-cleaned beaches, indicating that the microbial food web off the un-cleaned beaches is stimulated by the discharge of decomposing algal material. The conclusion of the study is that mechanical cleaning reduces the organic content of the beach sand and may change the water quality and microbial production, but the effect on the macrofaunal biodiversity is insignificant.

Malm, Torleif; Råberg, Sonja; Fell, Sabine; Carlsson, Per

2004-06-01

190

Function-Related Structural Characters and Their Modifications in the Hindgut Epithelium of Two Terrestrial Isopods, Armadillidium vulgare and Oniscus asellus  

Microsoft Academic Search

Intercellular junctions of the hindgut epithelial cells of two terrestrial isopods, Armadillidium vulgare and Oniscus asellus, are described. Long septate desmosomes occupy the subluminal region while gap junctions, zonulae adherens and intercellular spaces characterize the remainder of the convoluted lateral cell borders. The specialized junctional complexes and the ultrastructural morphology of the cells indicate that the terrestrial isopod hindgut epithelium

Laura Coruzzi; Ruth Witkus; Grace M. Vernon

1982-01-01

191

Locomotor activity and zonation of upper shore arthropods in a sandy beach of north central Chile  

NASA Astrophysics Data System (ADS)

The tenebrionid beetle Phalerisida maculata Kulzer, the talitrid amphipod Orchestoidea tuberculata Nicolet and the oniscid isopod Tylos spinulosus Dana are semi-terrestrial burrowing species, which coexist on sandy beaches of north central Chile (28-30°S). During the night, these scavengers emerge to make downshore migrations. Given the similarity in niches of these three species (all are known to include macroalgal detritus in their diet) and their relatively high abundance on that beaches, there is the potential for some degree of interaction, both inter- and intraspecific. Field studies were carried out to examine zonation of these burrowing organisms and eventual time and/or space partitioning of locomotor activity during night hours. Locomotor activity on the beach surface was analyzed over 12 h periods during spring and neap tides of September and December 2000, and March 2001. Scavengers moving over the beach surface were captured using pitfall traps buried with their rims flush with the beach surface along a transect extended from the foot of the dunes to the highest levels reached by the swashes. Every 1 h the captured animals in the traps were collected. Locomotor activity was also studied in the laboratory with chambers equipped with infrared recording systems (actographs). Data downloaded from the actographs were graphed to obtain a display of locomotor activity per 15 min interval during the course of the 7 day experiments. Results show space partitioning of burrowed organisms and time partitioning in the locomotor activity of O. tuberculata, T. spinulosus and P. maculata over the beach surface. Circular statistics showed that usually the activity peaks of O. tuberculata were more different from those of P. maculata and T. spinulosus than those of the last two species when compared with each other. Intraspecific differences were also found in the surface locomotor activity, primarily between juveniles and adults of O. tuberculata. Interseasonal comparisons of capture figures show that the highest locomotor activity occurred during early summer (December 2000). Moon phases apparently affect locomotor activity (i.e. T. spinulosus and P. maculata had higher locomotor activity during neap tides as compared with that observed during spring tide samplings carried out with full moon). Periodograms resulting from the locomotor activity of adults of O. tuberculata, T. spinulosus and P. maculata studied with actographs and total darkness show evidence of a circadian endogenous component close to 23-25 h. Activity peaks close to 11-14 h were also found that probably represents a circatidal component in the locomotor activity. Results of actograph experiments under constant light show that the circadian rhythm of locomotor activity of O. tuberculata was the only one maintained throughout the experiment and phased with the subjective night. Analyses of contour distributional maps and mean hourly zonations show that the locomotor activity of the studied species also differed, specially that of O. tuberculata versus that of T. spinulosus and P. maculata. Results of coexistence experiments showed no evidence of intraspecific interactions. Similar experiments evidentiated interspecific interactions: those species with similarities in locomotor activity (that is T. spinulosus and P. maculata) showed no interactions between them, while both of them had negative interactions with O. tuberculata, the species which separated more in time and hourly zonation of locomotor activity. Thus, differences in time/space partitioning of surface locomotor activity can be interpreted as a means to avoid detrimental interactions in this guild of scavengers. That partitioning would allow coexistence of interacting scavenger species and provides evidence that biological interactions are indeed important in community structure of sandy beach macroinfauna.

Jaramillo, E.; Contreras, H.; Duarte, C.; Avellanal, M. H.

2003-10-01

192

Horseshoe crab (Limulus polyphemus) reproductive activity on Delaware Bay beaches: Interactions with beach characteristics  

USGS Publications Warehouse

We used results from a survey of horseshoe crab reproductive activity that was conducted in 1999 throughout Delaware Bay to examine the relationship between estimates of spawning females and egg deposition and analyze how that relationship varies with geography, time within a spawning season, beach morphology, and wave energy. We found that beach morphology and wave energy interacted with density of spawning females to explain variation in the density and distribution of eggs and larvae. For example, the quantity of eggs in surface sediment (i.e., eggs that are potentially available to foraging shorebirds) was associated with the density of spawning females, beach morphology, and wave energy. The association between beach morphology and live eggs in surface sediment was strong especially in late May (Percent Reduction in Error = 86% from regression tree model) where egg density was an order of magnitude higher on beaches <15 m wide (3.38*105 m-2; 90% CI: 2.29*105, 4.47*105) compared to wider beaches (1.49*104 m-2; 90% CI: 4.47*103, 2.53*104). Results also indicate that, among bay-front beaches, horseshoe crabs prefer to spawn on narrow beaches, possibly because of reduced wave energy. At peak periods of spawning activity, density of spawning females was inversely related to foreshore width on mid-latitude beaches within Delaware Bay (t = -2.68, 7 df, p = 0.03). Because the distribution of eggs across the foreshore varied with beach morphology and widened as the spawning season progressed, methods used to sample eggs need to be robust to variation in beach morphology and applicable regardless of when the samples are taken. Because beach morphology and wave energy were associated with the quantity of eggs in surface sediment, certain beach types may be critical to the conservation of shorebird foraging habitat.

Smith, D.R.; Pooler, P.S.; Loveland, R.E.; Botton, M.L.; Michels, S.F.; Weber, R.G.; Carter, D.B.

2002-01-01

193

Basic Information on the Beach Standards, Monitoring, & Notification Program  

NSDL National Science Digital Library

The U.S. EPA BEACH Program website describes how the public's health and environmental quality of our nation's beaches can be improved. It focuses on strengthening beach standards and testing, providing faster laboratory test methods, predicting pollution, investing in health and methods research, and informing the public about the environmental quality of our beaches.

2006-11-30

194

Hispanics push for equality in Palm Beach County school district  

E-print Network

Hispanics push for equality in Palm Beach County school district WPEC - CBS12.com 2011-09-21 22:16:58 PALM BEACH COUNTY, Fla. -- A group of Hispanic business and community leaders pack the Palm Beach, 29 percent of Palm Beach County Students are Hispanic. Meanwhile, less than 10 percent of teachers

Belogay, Eugene A.

195

Palm Beach County nonprofits get creative, gain By EMILY ROACH  

E-print Network

Palm Beach County nonprofits get creative, gain stability By EMILY ROACH Palm Beach Post Staff Writer Updated: 5:47 a.m. Tuesday, Aug. 30, 2011 Posted: 10:26 p.m. Monday, Aug. 29, 2011 Palm Beach. The center had committed six years earlier to moving to West Palm Beach's city hall complex on Clematis

Belogay, Eugene A.

196

Surf City and North Topsail Beach, NC 27 August 2010  

E-print Network

Surf City and North Topsail Beach, NC 27 August 2010 Abstract: Surf City and North Topsail Beach elevation of 15 feet NGVD fronted by a 7-foot NGVD (50-foot wide) beach berm. The project also includes Topsail Beach. The total average annual benefits are $39,775,000 with $11,180,000 in total annual costs

US Army Corps of Engineers

197

78 FR 33969 - Special Local Regulations; Daytona Beach Grand Prix of the Sea, Atlantic Ocean; Daytona Beach, FL  

Federal Register 2010, 2011, 2012, 2013

...Beach Grand Prix of the Sea, Atlantic Ocean; Daytona Beach, FL AGENCY...regulation on the waters of the Atlantic Ocean east of Daytona Beach, Florida...will be held on the waters of the Atlantic Ocean east of Daytona Beach,...

2013-06-06

198

75 FR 20802 - Safety Zone; New York Air Show at Jones Beach State Park, Atlantic Ocean off of Jones Beach...  

Federal Register 2010, 2011, 2012, 2013

...Show at Jones Beach State Park, Atlantic Ocean off of Jones Beach, Wantagh...performing aerobatic maneuvers over the Atlantic Ocean off of Jones Beach State Park...aircraft over a specified area of the Atlantic Ocean off of Jones Beach State...

2010-04-21

199

The recreational value of beaches in the Nelson Mandela Bay area, South Africa  

Microsoft Academic Search

Using beach visitation data collected via the administration of a questionnaire to 226 respondents, this paper estimates a random utility model of beach recreation. The relative value of selected attributes of beaches is estimated, and the recreational values of lost access to four Blue Flag beaches in the Nelson Mandela Bay area, namely Kings beach, Humewood beach, Hobie beach and

Mario Du Preez; Deborah Ellen Lee; Stephen Gerald Hosking

2011-01-01

200

Case study Piçarras Beach: Erosion and nourishment of a headland bay beach  

Microsoft Academic Search

Master project report.\\u000aPiçarras is one of the touristic beaches of Santa Catarina state in Brazil. Piçarras beach is a headland bay beach. In the bay irregular features like an island, rocky outcrops and shoals are present influencing wave propagation. In the south Piçarras is bounded by Piçarras river. The river mouth has been fixated in 1970, after which erosion

S. Van den Heuvel; R. Hoekstra; R. De Zeeuw; A. Zoon

2008-01-01

201

Morphodynamics of a mesotidal rocky beach: Palmeras beach, Gorgona Island National Natural Park, Colombia  

NASA Astrophysics Data System (ADS)

The response of a rocky beach to different possible combinations of hydrodynamic conditions (tides, waves, oceanic currents) has been little studied. In this work, the morphodynamic response to different hydrodynamic forcing is evaluated from sedimentological and geomorphological analysis in seasonal and medium term (19 years) scale in Palmeras beach, located in the southwest of Gorgona Island National Natural Park (NNP), a mesotidal rocky island on the Colombian Pacific continental shelf. Palmeras is an important nesting area of two types of marine turtles, with no anthropogenic stress. In the last years, coastal erosion has reduced the beach width, restricting the safe areas for nesting and conservation of these species. Until now, the sinks, sources, reservoirs, rates, and paths of sediments were unknown, as well as their hydrodynamic forcing. The beach seasonal variability, from October 2010 to August 2012, was analyzed based on biweekly or monthly measurements of five beach profiles distributed every 200 m along the 1.2 km of beach length. The main paths for sediment transport were defined from the modeling of wave currents with the SMC model (Coastal Modeling System), as well as the oceanic currents, simulated for the dry and wet seasons of 2011 using the ELCOM model (Estuary and Lake COmputer Model). Extreme morphologic variations over a time span of 19 years were analyzed with the Hsu and Evans beach static equilibrium parabolic model, from one wave diffraction point which dominates the general beach plan shape. The beach lost 672 m3/m during the measuring period, and erosional processes were intensified during the wet season. The beach trends responded directly to a wave mean energy flux change, resulting in an increase of up to 14 m in the width northward and loss of sediments in the beach southward. This study showed that to obtain the integral morphodynamic behavior of a rocky beach it is necessary to combine information of hydrodynamic, sedimentology and geomorphology in different time scales.

Gómez-García, A. M.; Bernal, G. R.; Osorio, A. F.; Botero, V.

2014-10-01

202

(dm-)Beach Creation by Breaking Waves  

E-print Network

(1938-2007). #12;... Howell Peregrine... ·! British applied mathematician on surface wave phenomena. ·! Hypothesis: beach forms because sea has energy in all frequencies; slow because only bit of correct frequency

Al Hanbali, Ahmad

203

A Day at the Beach, Anyone?  

NSDL National Science Digital Library

A field trip to the shore can engage students in real-world science and offer plentiful opportunities for interdisciplinary learning. This field trip "action plan" ensures that a day at the beach goes smoothly for students and chaperones alike.

Fredericks, Anthony D.; Childers, Julie

2004-07-01

204

Sea level anomalies exacerbate beach erosion  

NASA Astrophysics Data System (ADS)

level anomalies are intra-seasonal increases in water level forced by meteorological and oceanographic processes unrelated to storms. The effects of sea level anomalies on beach morphology are unknown but important to constrain because these events have been recognized over large stretches of continental margins. Here, we present beach erosion measurements along Onslow Beach, a barrier island on the U.S. East Coast, in response to a year with frequent sea level anomalies and no major storms. The anomalies enabled extensive erosion, which was similar and in most places greater than the erosion that occurred during a year with a hurricane. These results highlight the importance of sea level anomalies in facilitating coastal erosion and advocate for their inclusion in beach-erosion models and management plans. Sea level anomalies amplify the erosive effects of accelerated sea level rise and changes in storminess associated with global climate change.

Theuerkauf, Ethan J.; Rodriguez, Antonio B.; Fegley, Stephen R.; Luettich, Richard A.

2014-07-01

205

The Immune Cellular Effectors of Terrestrial Isopod Armadillidium vulgare: Meeting with Their Invaders, Wolbachia  

PubMed Central

Background Most of crustacean immune responses are well described for the aquatic forms whereas almost nothing is known for the isopods that evolved a terrestrial lifestyle. The latter are also infected at a high prevalence with Wolbachia, an endosymbiotic bacterium which affects the host immune system, possibly to improve its transmission. In contrast with insect models, the isopod Armadillidium vulgare is known to harbor Wolbachia inside the haemocytes. Methodology/Principal Findings In A. vulgare we characterized three haemocyte types (TEM, flow cytometry): the hyaline and semi-granular haemocytes were phagocytes, while semi-granular and granular haemocytes performed encapsulation. They were produced in the haematopoietic organs, from central stem cells, maturing as they moved toward the edge (TEM). In infected individuals, live Wolbachia (FISH) colonized 38% of the haemocytes but with low, variable densities (6.45±0.46 Wolbachia on average). So far they were not found in hyaline haemocytes (TEM). The haematopoietic organs contained 7.6±0.7×103 Wolbachia, both in stem cells and differentiating cells (FISH). While infected and uninfected one-year-old individuals had the same haemocyte density, in infected animals the proportion of granular haemocytes in particular decreased by one third (flow cytometry, Pearson's test?=?12 822.98, df?=?2, p<0.001). Conclusions/Significance The characteristics of the isopod immune system fell within the range of those known from aquatic crustaceans. The colonization of the haemocytes by Wolbachia seemed to stand from the haematopoietic organs, which may act as a reservoir to discharge Wolbachia in the haemolymph, a known route for horizontal transfer. Wolbachia infection did not affect the haemocyte density, but the quantity of granular haemocytes decreased by one third. This may account for the reduced prophenoloxidase activity observed previously in these animals. PMID:21533137

Bertaux, Joanne; Raimond, Maryline; Morel, Franck; Bouchon, Didier; Greve, Pierre; Braquart-Varnier, Christine

2011-01-01

206

Salinity and groundwater flow below beaches  

NASA Astrophysics Data System (ADS)

High rates of exchange between seawater and fresh groundwater in beach sediments drive significant chemical reactions, but the groundwater flow that controls this is poorly understood. Current conceptual models for groundwater flow in beaches highlight an upper saline plume, which is separated from the traditional freshwater-saltwater interface by a zone of brackish to fresh groundwater discharge. The lack of an upper saline plume at our study site led us to ask whether the plume exists in all beaches and what hydrogeological features control its formation. We used variable-density, saturated-unsaturated, transient groundwater flow models to investigate the geometry of the freshwater-saltwater interface in beaches with slopes varying from 0.1 to 0.01. We also varied hydraulic conductivity, dispersivity, tidal amplitude, inflow of fresh groundwater and precipitation. All models showed that a salinity gradient developed between the fresh groundwater and seawater in the intertidal zone, but the magnitude of the gradient was variable. The hydraulic conductivity was an important control on the development of an upper saline plume. A hydraulic conductivity of 100 m/d allowed the formation of an upper saline plume in every beach slope. No upper saline plumes formed in any beach with hydraulic conductivities less than 10 m/d. The slope of the beach was also a significant control. In models using a representative hydraulic conductivity of 10 m/d, the upper saline plume only formed in beaches with a slope of 0.5 or greater. The salinity of brackish groundwater that discharges seaward of the upper saline plume was inversely proportional to the input of fresh groundwater. Prior studies of groundwater flow and salinity in beaches have used very small dispersivities, but we found that the upper saline plume becomes much less distinct when larger dispersivities are used. Real beaches are highly mixed environments and the appropriate magnitude of dispersivity remains unclear. Our results suggest that upper saline plumes may not form in beaches of the U.S. Southeast, which are characterized by fine-grained sediment and moderate slopes. The concentration gradient between the upper saline plume and adjacent groundwater discharge zone increased with decreasing longitudinal dispersivity.

Evans, T. B.; Wilson, A. M.; Moore, W. S.

2013-12-01

207

Mixed sediment beach processes: Kachemak Bay, AK  

Microsoft Academic Search

Numerous studies have documented the rates of sediment transport along well-sorted, sand-rich beaches relating sediment transport to forcing by waves and currents. The dynamics of mixed-grain size beaches, however, have received relatively little attention in the scientific literature in spite of the estimate that these systems represent approximately 80 percent of the world's non-rocky coastlines. The tectonically active, megatidal, sea

P. Ruggiero; P. N. Adams; J. A. Warrick

2006-01-01

208

An holistic approach to beach erosion vulnerability assessment.  

PubMed

Erosion is a major threat for coasts worldwide, beaches in particular, which constitute one of the most valuable coastal landforms. Vulnerability assessments related to beach erosion may contribute to planning measures to counteract erosion by identifying, quantifying and ranking vulnerability. Herein, we present a new index, the Beach Vulnerability Index (BVI), which combines simplicity in calculations, easily obtainable data and low processing capacity. This approach provides results not only for different beaches, but also for different sectors of the same beach and enables the identification of the relative significance of the processes involved. It functions through the numerical approximation of indicators that correspond to the mechanisms related to the processes that control beach evolution, such as sediment availability, wave climate, beach morhodynamics and sea level change. The BVI is also intended to be used as a managerial tool for beach sustainability, including resilience to climate change impact on beach erosion. PMID:25123815

Alexandrakis, George; Poulos, Serafim ?

2014-01-01

209

MONITORING AND MODELING NEARSHORE DREDGE DISPOSAL FOR INDIRECT BEACH NOURISHMENT, OCEAN BEACH, SAN  

E-print Network

MONITORING AND MODELING NEARSHORE DREDGE DISPOSAL FOR INDIRECT BEACH NOURISHMENT, OCEAN BEACH, SAN FRANCISCO Patrick L. Barnard1 , Daniel M. Hanes1 , Jamie Lescinski1 and Edwin Elias2 Nearshore dredge toward the shore, providing evidence that annual dredge disposal at this site could be beneficial over

210

Visitors' Motivation for Attending the South Beach Wine and Food Festival, Miami Beach, Florida  

Microsoft Academic Search

The objective of this study was to identify the major factors that motivated visitors to attend the South Beach Wine and Food Festival in Miami Beach, Florida, and determine whether these factors varied among the visitors from the United States, Canada, South America, Europe, and Asia. A survey of 475 visitors to South Florida was conducted in February 2006. Forty?four

Yvette Reisinger

2008-01-01

211

Linkage of biomarkers along levels of biological complexity in juvenile and adult diazinon fed terrestrial isopod ( Porcellio scaber, Isopoda, Crustacea)  

Microsoft Academic Search

In parallel laboratory experiments, we determined the effect of a typical representative of organophosphorous pesticides, diazinon, on AChE activity, lipid, protein and glycogen content, weight change, feeding activity and mortality of juvenile and adult terrestrial isopods Porcellio scaber (Isopoda, Crustacea). Organophosphorous pesticides (OP) are among the most extensively used pesticides, which have replaced organochlorine pesticides. OPs inhibit the enzyme acetylcholinesterase

Katja Stanek; Damjana Drobne; Polonca Trebše

2006-01-01

212

First recorded cave-dwelling terrestrial isopods (Isopoda: Oniscidea) in Iran with a description of a new species .  

PubMed

Cave-dwelling terrestrial isopods from the province of Kohgiluyeh and Boyerahmad, southwestern Iran, are reported here. These include three accidental and one troglobitic species namely Protracheoniscus gakalicus n. sp., which is also the first recorded troglobitic species from the genus Protracheoniscus. The new species is readily distinguished by the lack of eyes and pigmentation. PMID:25277941

Kashani, Ghasem M; Malekhosseini, Mohammad-Javad; Sadeghi, Saber

2013-01-01

213

The effects of temperature on metabolic rate and protein synthesis following a meal in the isopod Glyptonotus antarcticus Eights (1852)  

Microsoft Academic Search

Seawater temperatures in Antarctica are low, and typically rather stable seasonally. Associated with this, many marine invertebrates have low resting metabolic rates with a limited aerobic scope, and are often stenothermal. We have therefore investigated the response of metabolic rate and protein synthesis to feeding in the large Antarctic isopod, Glyptonotus antarcticus, at two different temperatures. The resting oxygen consumption

R. Robertson; A. El-Haj; A. Clarke; L. Peck; E. Taylor

2001-01-01

214

A comparative study on the fine structure of developing spermatozoa in the isopod, Oniscus asellus , and the amphipod, Orchestoidea sp  

Microsoft Academic Search

Developing spermatids and mature spermatozoa from the isopod, Oniscus asellus and the amphipod, Orchestoidea sp. have been examined with the light microscope and the electron microscope and have been found to have similar morphologies. As spermiogenesis proceeds the nucleus migrates to one pole of the spermatid at which point an acrosome, contiguous rod, and cross-striated tail develop. The acrosomal vesicle

James F. Reger

1966-01-01

215

Abstract In Idotea baltica, a marine isopod that lives and feeds on the brown alga Fucus vesiculosus, microha-  

E-print Network

Abstract In Idotea baltica, a marine isopod that lives and feeds on the brown alga Fucus on the light-coloured and exposed apical parts of the alga. We investigated how the requirements of avoiding with a choice between a dark, concealing and a light, ex- posing background, the preference for a dark

Jormalainen, Veijo

216

A light and electron microscope study of the hindgut of the herbivorous isopod, Dynamene bidentata (Crustacea: Peracarida)  

Microsoft Academic Search

The tubular hindgut of the intertidal herbivorous isopod, Dynamene bidentata, consists of a long dorso-ventrally flattened anterior region, surrounded by a network of muscles, and a short muscular sphincter which grades into a pair of anal flaps. The monolayer of epithelial cells forming the wall of the hindgut appears to take no part in the production of digestive enzymes, food

D. M. HOLDICIt; N. A. Ratcliffe

1970-01-01

217

THE CAVERNICOLOUS FAUNA OF HAWAIIAN LAVA TUBES, 2. TWO NEW GENERA AND SPECIES OF BLIND ISOPOD CRUSTACEANS (Oniscoidea: Philosciidae)1  

Microsoft Academic Search

Two species of blind, pigmentless isopods are described from three different locations on the Hawaiian Island chain. They are inhabitants of lava tubes which are the caves of the Hawaiian Islands. Each species is described in a separate genus because they are widely different morphologically. The species, perhaps imported with soil, are most likely not endemic to the islands. Notes

George A. Schultz

218

Selective grazing of the isopod Idotea baltica between Fucus evanescens and F. vesiculosus from Kiel Fjord (western Baltic)  

Microsoft Academic Search

Grazing rates of the isopod Idotea baltica on Fucus evanescens and F. vesiculosus (Phaeophyta) were quantified in laboratory feeding preference experiments. Fucus species were offered alone (no-choice) or simultaneously (choice). In three of four no-choice experiments and in all four choice experiments, I. baltica significantly preferred F. vesiculosus to F. evanescens. F. evanescens recently immigrated into Kiel Fjord and has

B. Schaffelke; D. Evers; A. Walhorn

1995-01-01

219

The role of isopods and amphipods in the initial fragmentation of eelgrass detritus in Nova Scotia, Canada  

Microsoft Academic Search

Daytime observations on the isopods Idotea phosphorea and I. baltica and the amphipod Gammarus oceanicus held in laboratory microcosms showed that I. phosphorea and G. oceanicus spent 45% and 30% respectively, of their active time feeding on dead, intact eelgrass leaves which had been recently released from plants. I. baltica spent 41% of its active time consuming intact green leaves.

A. I. Robertson; K. H. Mann

1980-01-01

220

Structural investigation of the female genitalia and sperm-storage sites in the terrestrial isopod Armadillidium vulgare (Crustacea, Isopoda)  

Microsoft Academic Search

The cuticular genitalia of the terrestrial isopod, Armadillidium vulgare, have two distinct states during the reproductive cycle of the females. The structural differences between the reproductive and non-reproductive states, and the structure of the sperm storage sites were investigated employing electron and light microscopy. In both states the genitalia consist of a distal segment that connects to the gonopore, and

Sachiko Suzuki; Andreas Ziegler

2005-01-01

221

Biogeographic and ecological implications of newly discovered populations of the stygobiont isopod crustacean Antrolana lira Bowman (Cirolanidae)  

Microsoft Academic Search

The recent discovery of the stygobiont isopod Antrolana lira Bowman from five new cave localities in the Shenandoah Valley of northwestern Virginia has not only resulted in a significant range extension for this rare species but has also shed new light on its origin and increased our knowledge of its habitat. Prior to 1990, A. lira was known only from

J. R. Holsinger; D. A. Hubbard Jr; T. E. Bowman

1994-01-01

222

Immunohistochemical Study of Androgenic Gland Hormone: Localization in the Male Reproductive System and Species Specificity in the Terrestrial Isopods  

Microsoft Academic Search

Androgenic gland hormone (AGH) is responsible for male sexual differentiation in crustaceans. AGH of the terrestrial isopod, Armadillidium vulgare, is a heterodimetric glycoprotein. To determine the distribution of AGH in the male reproductive system, an immunohistochemical study was carried out using antibodies raised against different components of the proAGH molecule of A. vulgare, for example, the whole molecule of recombinant

Yuriko Hasegawa; Atsuro Okuno; Hiromichi Nagasawa

2002-01-01

223

Evidence for female heterogamety in two terrestrial crustaceans and the problem of sex chromosome evolution in isopods  

Microsoft Academic Search

Female heterogamety (WZ type) has been demonstrated in the terrestrial isopods Oniscus asellus (Oniscidae) and Eluma purpurascens (Armadillidiidae), by making crosses between two genetic females (one of them experimentally reversed into a functional neo-male). The WW individuals generated by such crosses were viable and fertile females. These data, plus the frequent monomorphism of sex chromosomes and the coexistance of two

Pierre Juchault; Thierry Rigaud

1995-01-01

224

Protein differential expression induced by endocrine disrupting compounds in a terrestrial isopod.  

PubMed

Endocrine disrupting compounds (EDCs) have been studied due to their impact on human health and increasing awareness of their impact on wildlife species. Studies concerning the organ-specific molecular effects of EDC in invertebrates are important to understand the mechanisms of action of this class of toxicants but are scarce in the literature. We have used a dose/response approach to unravel the protein expression in different organs of isopods exposed to bisphenol A (BPA) and vinclozolin (Vz) and assess their potential use as surrogate species. Male isopods were exposed to a range of Vz or of BPA concentrations. After animal dissection, proteins were extracted from gut, hepatopancreas and testes. Protein profiles were analysed by electrophoresis and differentially expressed proteins were identified by MALDI mass spectrometry. EDCs affected proteins involved in the energy metabolism (arginine kinase), proteins of the heat shock protein family (Hsp70 and GRP78) and most likely microtubule dynamics (tubulin). Different proteins expressed at different concentrations in different organs are indicative of the organ-specific effects of BPA and Vz. Additionally, several proteins were up-regulated at lower but not higher BPA or Vz concentrations, bringing new data to the non-monotonic response curve controversy. Furthermore, our findings suggest that some common responses to EDCs in both vertebrates and invertebrates may exist. PMID:20189627

Lemos, Marco F L; Esteves, Ana Cristina; Samyn, Bart; Timperman, Isaak; van Beeumen, Jozef; Correia, António; van Gestel, Cornelis A M; Soares, Amadeu M V M

2010-04-01

225

Microsatellite Development and First Population Size Estimates for the Groundwater Isopod Proasellus walteri  

PubMed Central

Effective population size (Ne) is one of the most important parameters in, ecology, evolutionary and conservation biology; however, few studies of Ne in surface freshwater organisms have been published to date. Even fewer studies have been carried out in groundwater organisms, although their evolution has long been considered to be particularly constrained by small Ne. In this study, we estimated the contemporary effective population size of the obligate groundwater isopod: Proaselluswalteri (Chappuis, 1948). To this end, a genomic library was enriched for microsatellite motifs and sequenced using 454 GS-FLX technology. A total of 54,593 reads were assembled in 10,346 contigs or singlets, of which 245 contained candidate microsatellite sequences with suitable priming sites. Ninety-six loci were tested for amplification, polymorphism and multiplexing properties, of which seven were finally selected for Ne estimation. Linkage disequilibrium and approximate Bayesian computation methods revealed that Ne in this small interstitial groundwater isopod could reach large sizes (> 585 individuals). Our results suggest that environmental conditions in groundwater, while often referred to as extreme, are not necessarily associated with small Ne. PMID:24086709

Capderrey, Cecile; Kaufmann, Bernard; Jean, Pauline; Malard, Florian; Konecny-Dupre, Lara; Lefebure, Tristan; Douady, Christophe J.

2013-01-01

226

Morphological description of bacterial infection of digestive glands in the terrestrial isopod porcellio scaber (Isopoda, crustacea)  

PubMed

Morphological studies of the hepatopancreas of the terrestrial isopod Porcellio scaber revealed bacterial infection. The percentage of infected animals collected from the same site varied from 0 to 10% during the 4 years of study. Transmission electron microscopy, scanning electron microscopy, and light microscopy revealed that infected glands differed from those in healthy isopods. The most prominent sign was white spots between 100 and 200 &mgr;m in diameter along the entire gland. These spots were aggregations of vacuoles in the cells that were densely filled with bacteria in different phases of the developmental cycle that included the formation of small, dense, rod-shaped infective bacteria and much larger spherical multiplying cells filled with aggregates of polysomes and a chromatin network. Occasionally, large sphericles were filled with homogeneous electron-dense material. Bacteria were not observed in the cell nucleus. Small vacuoles of less than 5 &mgr;m were filled predominately with spherical bacteria but rod-shaped forms were also present in large numbers. Larger vacuoles of 10 to 20 &mgr;m in the main were densely filled with rod-shaped bacteria. According to the literature on the morphological characteristics of bacteria infecting invertebrates, those described in our study would be classified in the genus Rickettsiella. However, most recent investigations show that besides morphological investigations, genetic ones are also needed to define the taxonomic position of bacteria that infect invertebrates. Copyright 1999 Academic Press. PMID:9878297

Drobne; Strus; Znidarsic; Zidar

1999-01-01

227

Environmental- and growth stage-related differences in the susceptibility of terrestrial isopods to UV radiation.  

PubMed

Global environmental changes are nowadays one of the most important issues affecting terrestrial ecosystems. One of its most significant expressions is the increasing ultraviolet radiation (UVR) arising from the human-induced depletion in ozone layer. Therefore, to investigate the effects of UVR on the terrestrial isopod Porcellionides pruinosus a multiple biomarker approach was carried out. Two experiments were performed in order to analyze the importance of the exposure environment and the growth stage on the UV-induced damages. First, adult individuals were exposed to UVR in three exposure environments (soil, soil with leaves, and plaster). Thereafter, three growth stages using soil as the exposure condition were tested. Integrated biomarker responses (IBR) suggested that UV effects were higher in plaster, and mostly identified by changes in acetylcholinesterase and glutathione-S-transferases activities, lipid peroxidation rates, and total energy available. The effects in soil and soil with leaves were not so clear. In the growth stages' experiment, juveniles and pre-adults were found to be more affected than adults, with the greatest differences between irradiated and non-irradiated isopods occurring in energy-related parameters. Our findings suggest that soil surface-living macrofauna may be prone to deleterious effects caused by UVR, highlighting the importance of taking the media of exposure and growth stage in account. PMID:23899792

Morgado, Rui; Ferreira, Nuno G C; Tourinho, Paula; Ribeiro, Fabianne; Soares, Amadeu M V M; Loureiro, Susana

2013-09-01

228

Terrestrial isopods congregate under a low-level beta-emitter source.  

PubMed

Ionizing radiation is ubiquitous, but very few experiments have investigated the biological effects of the natural background radiation at very low doses (>10 mGy/yr). We examined whether the background radiation, or radiation of a slightly higher level, has a role in evoking changes in behaviors of terrestrial isopods (woodlice). Upon exposure to a source giving 15 times the background level placed at one end of a box, a significant increase in the number of woodlice gathering under the beta-source was observed with time, as compared with the sham control. Terrestrial isopods have chemoreceptors (the olfactory system) on the terminal segment of their antennae. An additional experiment confirmed the involvement of these antennae in the radiation effect on behavior. After the excision of the antennae, no beta-taxis response was observed. The behavior of the group exposed to the source giving 30 times the background tended to decrease gradually in the area of the source, and the individuals aggregated in the area away from the source. Thus, the olfactory sensor in the antennae may be an important organ involved in the prompt response to radiation exposure, and the discrimination of the radiation field strengths of radioisotopes. PMID:12363271

Kanao, Tomoko; Miyachi, Yukihisa; Yamada, Takeshi

2002-01-01

229

Threats to sandy beach ecosystems: A review  

NASA Astrophysics Data System (ADS)

We provide a brief synopsis of the unique physical and ecological attributes of sandy beach ecosystems and review the main anthropogenic pressures acting on the world's single largest type of open shoreline. Threats to beaches arise from a range of stressors which span a spectrum of impact scales from localised effects (e.g. trampling) to a truly global reach (e.g. sea-level rise). These pressures act at multiple temporal and spatial scales, translating into ecological impacts that are manifested across several dimensions in time and space so that today almost every beach on every coastline is threatened by human activities. Press disturbances (whatever the impact source involved) are becoming increasingly common, operating on time scales of years to decades. However, long-term data sets that describe either the natural dynamics of beach systems or the human impacts on beaches are scarce and fragmentary. A top priority is to implement long-term field experiments and monitoring programmes that quantify the dynamics of key ecological attributes on sandy beaches. Because of the inertia associated with global climate change and human population growth, no realistic management scenario will alleviate these threats in the short term. The immediate priority is to avoid further development of coastal areas likely to be directly impacted by retreating shorelines. There is also scope for improvement in experimental design to better distinguish natural variability from anthropogenic impacts. Sea-level rise and other effects of global warming are expected to intensify other anthropogenic pressures, and could cause unprecedented ecological impacts. The definition of the relevant scales of analysis, which will vary according to the magnitude of the impact and the organisational level under analysis, and the recognition of a physical-biological coupling at different scales, should be included in approaches to quantify impacts. Zoning strategies and marine reserves, which have not been widely implemented in sandy beaches, could be a key tool for biodiversity conservation and should also facilitate spillover effects into adjacent beach habitats. Setback and zoning strategies need to be enforced through legislation, and all relevant stakeholders should be included in the design, implementation and institutionalisation of these initiatives. New perspectives for rational management of sandy beaches require paradigm shifts, by including not only basic ecosystem principles, but also incentives for effective governance and sharing of management roles between government and local stakeholders.

Defeo, Omar; McLachlan, Anton; Schoeman, David S.; Schlacher, Thomas A.; Dugan, Jenifer; Jones, Alan; Lastra, Mariano; Scapini, Felicita

2009-01-01

230

Influence of Beach Scraping on Beach Profile Morphology: Fire Island, New York  

NASA Astrophysics Data System (ADS)

Fire Island is part of a barrier island system located just south of Long Island, New York. The island is 50 km long, oriented southwest-northeast, and varies in width from 150 meters to 1 kilometer. Established communities on Fire Island are part of Fire Island National Seashore (FIIS) which is managed by the National Park Service. The island is densely populated, and thus mitigating coastal erosion caused by large-scale storm waves has become an important issue. Severe nor'easter storms in 1991, 1992, and 1993 caused substantial erosion and property damage. This prompted communities within FIIS to conduct a pilot study in which the preventative, non-structural practice of beach scraping was employed as a method of erosion control. Beach scraping is the anthropogenic movement of sand from the berm to the back beach creating an artificial foredune. Currently, there is no published research that explores the morphologic influence of beach scraping on Fire Island, although the practice is still in place today for a number of communities. This study assesses changes caused by beach scraping using a temporally robust beach profile dataset of over 150 profiles, spanning thirteen years. Three study areas were chosen based on location (western, central, and eastern parts of Fire Island) and data availability in scraped and adjacent control areas. Analyzed characteristics include beach width, beach volume, slope (dune, beachface, global), berm crest elevation, and dune crest elevation. Initial results indicate a detectable difference in the behavior of the beach between scraped and control areas. Seasonal signals show beach width decreasing substantially westward from the scraped profile location, which is in the direction of net littoral transport. Anthropogenic relocation of berm material to the foredune zone during scraping places sediment in the back beach area that might otherwise be mobilized by storm waves, therefore depriving downcoast beaches of sediment. Longer-term comparisons (decadal) indicate that the beach is both widening and increasing in volume in the western study area (by 30-50%), which corresponds spatially to a persistent accretional cell that has been identified in current studies along this section of Fire Island.

Kratzmann, M.; Hapke, C.

2007-12-01

231

USING PUBLIC-DOMAIN MODELS TO ESTIMATE BEACH BACTERIA CONCENTRATIONS  

EPA Science Inventory

Stretches of beach along popular Huntington Beach, California are occassionally closed to swimming due to high levels of bacteria. One hypothesized source is the treated wastewater plume from the Orange County Sanitation District's (OCSD) ocean outfall. While three independent sc...

232

Nonlinear Magnetic Beach* Boris N. Breizman and Alexey V. Arefiev  

E-print Network

Nonlinear Magnetic Beach* Boris N. Breizman and Alexey V. Arefiev Institute for Fusion Studies into the directed energy of the ion flow. This work can be viewed as a nonlinear version of the magnetic beach

233

Mancae of the parasitic cymothoid isopod, Anilocra apogonae : early life history, host-specificity, and effect on growth and survival of preferred young cardinal fishes  

Microsoft Academic Search

Juvenile parasitic cymothoid isopods (mancae) can injure or kill fishes, yet few studies have investigated their biology.\\u000a While the definitive host of the adult cymothoids is usually a single host from a particular fish species, mancae may use\\u000a so-called optional intermediate hosts before settling on the definitive host. Little, however, is known about these early\\u000a interactions. The cymothoid isopod, Anilocra

R. M. Fogelman; A. S. Grutter

2008-01-01

234

Depositional settings of sand beaches along whitewater rivers  

USGS Publications Warehouse

The numbers and sizes of sand beaches suitable for recreation along selected whitewater rivers in the western United States depend on sand concentrations, range of discharge and the size, frequency and type of depositional settings. River-width expansions downstream from constrictions are the predominant depositional setting for sand beaches in the upper Grand Canyon and along five Wild and Scenic Rivers in Idaho, but not along other rivers. Beaches located upstream from constrictions are rare, in general, except in the Grand Canyon. Beaches found in expansions without constrictions dominate depositional sites along the Yampa and Green Rivers, are fairly common along the rivers in Idaho, but are relatively rare in the Grand Canyon. The magnitude of flow expansion is a reliable predictor of beach size. Beaches located on the inside of curves are uncommon, in general, but can be important recreation sites. The mid-channel bar setting is the least important from a recreation standpoint because that setting is rare and beaches there are typically small, and emergent only at low flow. The frequency of beaches is highly variable among rivers and the concentration of sand in transport is only partially responsible. Of the rivers studied, the unregulated Yampa River carries the highest concentrations of suspended sand and has among the most beaches (1.2 beaches km-1). Emergent sand beaches are essentially nonexistent along the Deschutes River and are rare along other Oregon rivers, yet these rivers transport some sand. Sand beaches are fairly common (0.8-1.1 beaches km-1) along the regulated Colorado River, but are comparatively rare (0.6 beaches km-1) along the unregulated Middle Fork Salmon River. The suspended sand concentrations in study reaches of these two rivers are similar, and the difference in the frequency of beaches may be largely because the processes that create beach-deposition settings are less active along the Middle Fork Salmon.

Vincent, K.R.; Andrews, E.D.

2008-01-01

235

Patterns of urban mercury contamination detected by bioindication with terrestrial isopods.  

PubMed

Mercury (Hg) is a trace element with high toxicological impact on potential receptors, including human beings. Global Hg emissions are predicted to increase significantly during the next 40 years. After emission, the metal is transported by air currents and precipitations, leading to increasing depositions even in areas far from emission sources. In the terrestrial environment, Hg is subjected to redistribution and transformation into different inorganic and metal-organic species that are taken up by vegetation and soil organisms. In the present study, the woodlouse (Porcellio scaber) was used as a biological indicator of total Hg pollution in the city of Dornbirn (province of Vorarlberg), Austria. Woodlice were collected from 30 sampling points scattered over the city area, 25 of them situated within a rectangular transect crossing the city area from west-northwest to east-southeast, starting near the Rheintal motorway and ending at the slopes of the Bregenzer Wald hills. In addition to woodlice, soil substrate samples were collected at nine of the selected sampling points. Total Hg concentrations were measured in isopod tissues and soil substrate samples by means of an Hg analyzer. Total Hg concentrations in isopod tissues were significantly correlated with Hg soil contents (P < 0.05). Moreover, a gradient of increasing Hg concentrations was observed in isopod samples along the transect across Dornbirn, with the lowest concentrations detected in woodlouse samples near the Rheintal motorway and the highest levels toward the ascending slopes of the Bregenzer Wald hills. This gradient of increasing Hg concentrations across the city matches a concomitant increase in wet precipitations along the same direction, indicating that deposition by wet precipitation may be an important source for Hg contamination in the city of Dornbirn. Overall, the degree of Hg contamination across the study area can be regarded as rather low, i.e., comparable with concentrations observed in other, unpolluted terrestrial habitats. It is concluded that bioindication by total Hg analysis in woodlice can be applied to distinguish between different levels and sources of contamination in urban areas. PMID:22534742

Pedrini-Martha, Veronika; Sager, Manfred; Werner, Richard; Dallinger, Reinhard

2012-08-01

236

Monitoring of beach enteromorpha variation with near shore video  

NASA Astrophysics Data System (ADS)

Beach is an important coastal protective barrier and tourism resources. Beach environment monitoring can help beach managers to make feasible decisions. Digital image of video monitoring technology can provide high resolution information of temporal and spatial variation of near shore in real time. The application of Video monitoring technology has been implemented in Qingdao's Shilaoren beach. The clustering method based on Gaussian mixture model is applied to extract beach enteromorpha changs for the digital images. Analysis results show that, the period of enteromorpha in Qingdao's Shilaoren beach was mainly from the early July to the mid-August in 2011, and the decline of enteromorpha is mainly associated with the rising temperature in the mid-August. Storm has significant impact on the beach enteromorpha. Tourists' activity space on the beach will decrease due to the enteromorpha covering on the beach, which affects beach tourism activities. Therefore, it's necessary to make preventive measures to avoid enteromorpha piling up on the beach, which is of great importance to the bathing beach environment and tourism development.

Hu, Yali; Yu, Xinsheng; Yan, Zhijin; Yi, Weidong

2014-07-01

237

Lynnhaven River Basin Ecosystem Restoration Project Virginia Beach, Virginia  

E-print Network

Lynnhaven River Basin Ecosystem Restoration Project Virginia Beach, Virginia 24 September 2013 the Lynnhaven River Basin. The watershed is located within the City of Virginia Beach in Southeastern Virginia is the City of Virginia Beach. The study area consists of the entire Lynnhaven River Basin, a 64-square- mile

US Army Corps of Engineers

238

107. VIEW OF BEACH DEVELOPMENT ON NORTHWEST SIDE OF PIER, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

107. VIEW OF BEACH DEVELOPMENT ON NORTHWEST SIDE OF PIER, LOOKING SOUTH-SOUTHEAST. SECTION OF PIER IS IN BACKGROUND Photograph #1579-HB. Photographer unknown, c. 1930-31 prior to replacement of original light standards in 1930-31 - Huntington Beach Municipal Pier, Pacific Coast Highway at Main Street, Huntington Beach, Orange County, CA

239

Modelling Groundwater Flow in Beach Profiles for Optimising Stabilising Measures  

Microsoft Academic Search

VESTERBY, H., 2000. Modelling Groundwater Flow in Beach Profiles for Optimising Stabilising Measures. The coherence between the elevation of the beach groundwater and erosional or accretionary trends of the beach face has been reported for years. Manipulation of the groundwater flow has during physical model tests and at the prototype scale shown reduction of the erosive processes and often let

Hans Vesterby

2000-01-01

240

Tracer Studies In A Laboratory Beach Subjected To Waves  

EPA Science Inventory

This work investigated the washout of dissolved nutrients from beaches due to waves by conducting tracer studies in a laboratory beach facility. The effects of waves were studied in the case where the beach was subjected to the tide, and that in which no tidal action was present...

241

POLYMERASE CHAIN REACTION (PCR) TECHNOLOGY IN VISUAL BEACH  

EPA Science Inventory

In 2000, the US Congress passed the Beaches Environmental Assessment and Coastal Health Act under which the EPA has the mandate to manage all significant public beaches by 2008. As a result, EPA, USGS and NOAA are developing the Visual Beach program which consists of software eq...

242

Rhomboid beach pattern: A laboratory investigation O. Devauchelle,1  

E-print Network

Click Here for Full Article Rhomboid beach pattern: A laboratory investigation O. Devauchelle,1 L December 2009; accepted 21 January 2010; published 18 June 2010. [1] The formation of beach rhomboid beach pattern: A laboratory investigation, J. Geophys. Res., 115, F02017, doi:10.1029/2009JF001471. 1

Lajeunesse, Eric

243

SWASH ZONE CHARACTERISTICS AT OCEAN BEACH, SAN FRANCISCO, CA  

E-print Network

1 SWASH ZONE CHARACTERISTICS AT OCEAN BEACH, SAN FRANCISCO, CA L. H. Erikson1 , D.M. Hanes2 , P.M. Barnard2 , and A. E. Gibbs2 Runup data collected during the summer of 2005 at Ocean Beach, San Francisco shows that the beach was dissipative with Iribarren numbers between 0.05 and 0.4 and that infragravity

244

May 20, 2004 TO: Newport Beach Planning Commission  

E-print Network

May 20, 2004 TO: Newport Beach Planning Commission We respectfully request the assistance of the city Planning Commission regarding a major community concern. AT ISSUE The city of Newport Beach has Commission= ALL required in the city's Zoning Code. The Newport Beach Zoning Code states, "Use permits

Touretzky, David S.

245

World Catalog of the Beach-Fly Family Canacidae (Diptera)  

E-print Network

World Catalog of the Beach-Fly Family Canacidae (Diptera) WAYNE N. MATH IS I SMITHSONIAN O G Y · N U M B E R 5 3 6 World Catalog of the Beach-Fly Family Canacidae (Diptera) Wayne N. Mathis of the Beach-Fly Family Canacidae (Diptera). Smithsonian Contributions toZoology, number 536,18 pages, 1992

Mathis, Wayne N.

246

DEGREE PROGRAM COMPARISON CHART ODU and ODU Virginia Beach  

E-print Network

DEGREE PROGRAM COMPARISON CHART ODU and ODU Virginia Beach UNDERGRADUATE DEGREE PROGRAMS ODU-VB ODU ODU has 69 Undergraduate Degree programs; 31 are available at ODU Virginia Beach* # of Degrees-to-degree completion by complementing Beach course offerings with online & main campus offerings. GRADUATE DEGREE

247

Gingrich Palm Beach County supporters 'disappointed but not discouraged'  

E-print Network

Gingrich Palm Beach County supporters 'disappointed but not discouraged' 2012-02-01 17:16:03 PALM BEACH COUNTY, Fla. -- As expected Newt Gingrich lost in Florida by a landslide. The polls predicted of three created a "Palm Beach County for Newt Gingrich 2012" Facebook page in November. Shortly afterwards

Belogay, Eugene A.

248

NEWPORT BEACH STANDS UP FOR LEONA VALLEY, GREEN VALLEY  

E-print Network

NEWPORT BEACH STANDS UP FOR LEONA VALLEY, GREEN VALLEY AND BOUQUET CANYON. It's time to take business in Newport Beach. Multiple times a month, paramedics, fire &/or police are called to the property, and suffering we, the neighbors of this business in Newport Beach, have experienced. In sharing my experience

Touretzky, David S.

249

Project # 1109 September 13-16, 2011 Clearwater Beach, FL  

E-print Network

Project # 1109 #12;#12;September 13-16, 2011 Clearwater Beach, FL i Welcome to our 51st Annual-16, 2011 Clearwater Beach, FL iii Table of Contents Welcome Letter ...................................................................................... 24 #12;The International Citrus & Beverage Conference iv #12;September 13-16, 2011 Clearwater Beach

Florida, University of

250

Jacksonville Zoo and the beach Note from Daryl  

E-print Network

Highlights Jacksonville Zoo and the beach Note from Daryl Bicycle Safety Daily Activities! First, we will drive to Jacksonville zoo to see animals! Then, we're going to the beach to swim and see Zoo and Beach are now SOLD OUT. If you want to go, see Nate to sign up in case other students can't go

Pilyugin, Sergei S.

251

North beach (Nazaré) sand tracer experiment  

NASA Astrophysics Data System (ADS)

The littoral in the vicinity of Nazaré (West Portuguese coast) is characterized by two distinct coastal stretches separated by Nazaré headland: a northern sector (Norte beach) characterized by a high energetic continuous sandy beach and a southern sector (Nazaré bay beach) that corresponds to an embayed beach, sheltered by the Nazaré headland. The bay is a geomorphological expression of the Nazaré canyon head, which acts as powerful sediment sink, capturing the large longshore net southward transport at Norte beach generated by the north Atlantic high energetic swell. The northern side of the canyon head is carved on highly resistant Cretaceous limestone sustaining an underwater vertical relief that emerges on the Nazaré headland, creating a unusual nearshore wave pattern. This wave pattern not only concentrates high energy levels at the Norte beach but also contributes to local complex longshore drift gradients capable of inducing beach seasonal cross-shore variations of more than 200 m. The main factors that influence local sediment budget are: (1) canyon head capturing and (2) headland sediment bypassing. To obtain a direct measure of the net longshore drift at Norte beach (upstream boundary of the system) a large scale fluorescent tracer experiment was performed. The data will be used to validate longshore transport formulas in a high energetic environment and to access Nazaré canyon head sediment loss. Considering the anticipation of high transport rates, approximately 10 tonnes of native sand where coated with orange fluorescent ink using a set of concrete mixers. The experiment took place on the 9th to 15th September 2013 period and followed the continuous injection method (CIM). The CIM approach was justified by the expected high energy levels that inhibits sediment sampling across the surf zone. During the tracer injection procedure (approx. 5 hours), sediment sampling was performed at 13 sites along a rectilinear coastal stretch extended through 600 m downdrift of the injection point. Tracer was injected at a rate of 16 kg each 30 sec and collected at a frequency of 10 min at each site. Complementary sampling was performed at the inner shelf and at the beach southern of the headland. In order to follow tracer downdrift movement and headland sediment bypassing low resolution sampling was extended through three more days. Oceanographic forcing throughout the experiment was measured by an offshore wave buoy and an ADCP specifically deployed for the experiment. During the first tidal cycle, data from field observations using a hand held UV light showed a southward tracer displacement of more than 600 m. After the second tidal cycle, sediment tracer was detected in the Nazaré bay beach showing headland bypassing. Further insights on the sediment transport at the Nazaré canyon head system will be supported by the analysis of sediment samples collected at the beach and inner shelf using an automated image analysis system. This work was done in the framework of the PTDC/MAR/114674/2009 program, financed by FCT which the authors acknowledge gratefully.

Duarte, João; Taborda, Rui; Ribeiro, Mónica; Cascalho, João; Silva, Ana; Bosnic, Ivana

2014-05-01

252

Developmental toxicity of endocrine disrupters bisphenol A and vinclozolin in a terrestrial isopod.  

PubMed

Studies of the effects of endocrine-disrupting compounds (EDCs) on invertebrates are still largely underrepresented. This work aims to fill this gap by assessing the effects of bisphenol A (BPA) and vinclozolin (Vz) on the terrestrial isopod Porcellio scaber (common rough woodlouse). Male adult and sexually undifferentiated juvenile woodlice were exposed to the toxicants. Effects on molting regime and growth were investigated independently for males and female woodlice after sexual differentiation. Both chemicals elicited developmental toxicity to P. scaber by causing overall decreased growth. Nevertheless, BPA induced molting, whereas Vz delayed it. Although the LC50 values for juvenile and adult survival were fairly similar, juvenile woodlice showed an increased chronic sensitivity to both chemicals, and female woodlice were most the sensitive to BPA. We recommend the use of adults, juveniles, female, and male woodlice, as well as a large range of toxicant concentrations, to provide valuable information regarding differential dose responses, effects, and threshold values for EDCs. PMID:20148245

Lemos, M F L; van Gestel, C A M; Soares, A M V M

2010-08-01

253

Developmental Toxicity of Endocrine Disrupters Bisphenol A and Vinclozolin in a Terrestrial Isopod  

PubMed Central

Studies of the effects of endocrine-disrupting compounds (EDCs) on invertebrates are still largely underrepresented. This work aims to fill this gap by assessing the effects of bisphenol A (BPA) and vinclozolin (Vz) on the terrestrial isopod Porcellio scaber (common rough woodlouse). Male adult and sexually undifferentiated juvenile woodlice were exposed to the toxicants. Effects on molting regime and growth were investigated independently for males and female woodlice after sexual differentiation. Both chemicals elicited developmental toxicity to P. scaber by causing overall decreased growth. Nevertheless, BPA induced molting, whereas Vz delayed it. Although the LC50 values for juvenile and adult survival were fairly similar, juvenile woodlice showed an increased chronic sensitivity to both chemicals, and female woodlice were most the sensitive to BPA. We recommend the use of adults, juveniles, female, and male woodlice, as well as a large range of toxicant concentrations, to provide valuable information regarding differential dose responses, effects, and threshold values for EDCs. PMID:20148245

van Gestel, C. A. M.; Soares, A. M. V. M.

2010-01-01

254

Cosmology at the Beach Lecture: Wayne Hu  

SciTech Connect

Wayne Hu lectures on Secondary Anisotropy in the CMB. The lecture is the first in a series of 3 he delivered as part of the "Cosmology at the Beach" winter school organized by Berkeley Lab's George Smoot in Los Cabos, Mexico from Jan. 12-16, 2009.

Wayne Hu

2009-03-02

255

An Interview with Beatrice Beach Szekely  

ERIC Educational Resources Information Center

This article presents an interview with Beatrice Beach Szekely, a comparative education scholar that specialized in the Soviet Union. She was editor of the journal "Soviet Education" from 1970 to 1989. During the interview, Szekely talked about how she became personally involved in Russian/Soviet studies of education. She related that her interest…

Steiner-Khamsi, Gita

2007-01-01

256

Miami Beach: Eden Roc Renaissance Hotel  

Microsoft Academic Search

The Eden Roc Renaissance Miami Beach was completed in 1956. Designed by architect Morris Lapidus after completing the Fontainebleu, the Eden Roc’s neighbor. Lapidus used curvy and innovative designs that were widely criticized at the time they were being built. At the time it was built, the Eden Roc was considered a vision of the Italian Renaissance. Today the style

Chet Smolski; Morris Lapidus

1978-01-01

257

Rip Channel Morphodynamics at Pensacola Beach, Florida  

E-print Network

that there are rip current hot spots at Pensacola Beach, forced by a ridge and swale topography offshore, but the annual evolution/behavior of these hotspots (i.e. location, size, frequency, and orientation) have not been examined in detail. Remote imagery from...

Labude, Daniel

2012-08-15

258

Cosmology at the Beach Lecture: Wayne Hu  

ScienceCinema

Wayne Hu lectures on Secondary Anisotropy in the CMB. The lecture is the first in a series of 3 he delivered as part of the "Cosmology at the Beach" winter school organized by Berkeley Lab's George Smoot in Los Cabos, Mexico from Jan. 12-16, 2009.

Wayne Hu

2010-01-08

259

Do predator cues influence turn alternation behavior in terrestrial isopods Porcellio laevis Latreille and Armadillidium vulgare Latreille?  

PubMed

Terrestrial isopods (Crustacea: Oniscidea) make more alternating maze turns in response to negative stimuli, a navigational behavior that corrects divergence from a straight line. The present study investigates this behavioral pattern in two species, Porcellio laevis Latreille and Armadillidium vulgare Latreille, in response to short-term vs. long-term exposure to indirect cues from predatory ants. Neither isopod species increased the number of alternating turns in response to short-term indirect exposure to ants, but both species made significantly more alternating turns following continuous indirect exposure to ants for a period of one-week. These results are surprising given differences in behavioral and morphological predator defenses between these species (the Armadillidiidae curl into defensive postures when attacked, whereas the Porcellionidae flee). The marked similarity in alternating turn behavior of the two families suggests evolutionary conservation of antipredator navigation mechanisms. PMID:24954552

Hegarty, Kevin G; Kight, Scott L

2014-07-01

260

Isolation and Amino Acid Sequence of a Peptide with Vitellogenesis Inhibiting Activity from the Terrestrial Isopod Armadillidium vulgare (Crustacea)  

Microsoft Academic Search

The complete amino acid sequence of a neuropeptide was established using gas-phase microsequencing, mass spectrometry, and reverse transcription–polymerase chain reaction. This peptide, stored in the sinus gland of the terrestrial isopod Armadillidium vulgare, inhibited vitellogenin synthesis by the fat tissue and inhibited the onset of secondary vitellogenesis when tested in homologous bioassays. This peptide, named Arv-VIH, has 83 amino acid

Pierre Grève; Odile Sorokine; Thierry Berges; Christian Lacombe; Alain Van Dorsselaer; Gilbert Martin

1999-01-01

261

Early reproduction and increased reproductive allocation in metal-adapted populations of the terrestrial isopod Porcellio scaber  

Microsoft Academic Search

Organisms inhabiting metal-contaminated areas can be stressed by metal exposure and are possibly subject to selection, resulting\\u000a in increased metal tolerance and changes in growth and\\/or reproduction characteristics. In a previous study it was found that\\u000a in the terrestrial isopod Porcellio scaber, sampled from the vicinity of a zine smelter, the body size was small and the brood size was

M. H. Donker; C. Zonneveld; N. M. van Straalen

1993-01-01

262

Description of two new species and redescription of one species of agnarid terrestrial isopods (Oniscidea, Agnaridae) from western Iran.  

PubMed

The present study reports on three species of terrestrial isopods from western Iran. The genus Mongoloniscus Verhoeff, 1930 is recorded for the first time from Iran, with description of a new species: M. persicus sp. n. Protracheoniscus ehsani sp. n. is described and P. darevskii Borutzky, 1975 is redescribed based on Iranian specimens. The diagnostic characters of these species are figured and their geographical distribution is presented on a map. PMID:25317061

Kashani, Ghasem M

2014-01-01

263

Effects de la temperature sur les rythmes d'emergence des peracarides fouisseurs, Urothoe elegans (amphipode) et Eurydice inermis (isopode)  

Microsoft Academic Search

En Méditerranée, dans l'intervalle de 10 à 25°C, les rythmes endogènes d'émergence des Péracarides fouisseurs Urothoe elegans et Eurydice inermis peuvent être affectés par la température.La période n'est que peu modifiée. A 24°C, elle est de 24 heures environ chez les deux espèces; à 12°C, elle atteint 24 heures 10 minutes chez l'Amphipode, 24 heures 20 minutes chez l'Isopode.Lors des

1980-01-01

264

Description of two new species and redescription of one species of agnarid terrestrial isopods (Oniscidea, Agnaridae) from western Iran  

PubMed Central

Abstract The present study reports on three species of terrestrial isopods from western Iran. The genus Mongoloniscus Verhoeff, 1930 is recorded for the first time from Iran, with description of a new species: M. persicus sp. n. Protracheoniscus ehsani sp. n. is described and P. darevskii Borutzky, 1975 is redescribed based on Iranian specimens. The diagnostic characters of these species are figured and their geographical distribution is presented on a map. PMID:25317061

Kashani, Ghasem M.

2014-01-01

265

Density dependent grazing effects of the isopod Idotea baltica Pallas on Fucus vesiculosus L in the Baltic Sea  

Microsoft Academic Search

In the Baltic Sea, abiotic factors are often supposed to explain the distribution of the key species Fucus vesiculosus. Still, in many areas, decline of F. vesiculosus has coincided with mass occurrence of the herbivorous isopod Idotea baltica. The aim of this work was to examine whether, how and at what densities I. baltica can affect the distribution of F. vesiculosus in the

Roland Engkvist; Torleif Malm; Stefan Tobiasson

2000-01-01

266

Isopod Inquiry.  

ERIC Educational Resources Information Center

Describes an inquiry-based science activity in which students investigate the preferred food sources of sowbugs. Students design their own experiment, perform a first trial, and refine their procedure before conducting a second trial with more accurate results. (SAH)

Mikulka, Thomas

2000-01-01

267

Beach Mice1 Brittany L. Bird, Lyn C. Branch, Mark E. Hostetler2  

E-print Network

WEC 165 Beach Mice1 Brittany L. Bird, Lyn C. Branch, Mark E. Hostetler2 1. This document is WEC 165/Christine Taylor Waddill, Dean. Beach mice, as their name indicates, live on beaches in Florida and Alabama. Beach live with beach mice in these dune habitats, including the six-lined racer, monarch butterflies, snowy

Branch, Lyn C.

268

Beach Closings: Science versus Public Perception  

NSDL National Science Digital Library

The issue-focused, peer-reviewed article addresses how beach closings are on the rise, but the public is not being given accurate information to help them get involved in solving the problem. The media, the publics primary information source, must provide information based on factual scientific evidence, not be swayed by economic and political factors, and work with scientists to obtain data and facts.

Erika Jensen and Sandra McLellan (Great Lakes WATER Institute;)

2005-04-01

269

Virginia Beach search and rescue experiment  

NASA Astrophysics Data System (ADS)

In May, 1998, the NASA Search and Rescue Mission conducted a SAR crash detection test in the swampy area south and west of Virginia Beach. A number of aircraft parts were hidden in the dense foliage. The radar used was the Navy P-3 with the ERIM XLC and UHF SAR, providing fine resolution imagery with full polarimetry and an IFSAR capability. This paper reports preliminary results of this test.

Rais, Houra; Mansfield, Arthur W.; Huxtable, Barton D.; Chotoo, Kancham

2000-08-01

270

Sand Beach Bacteria: Enumeration and Characterization  

PubMed Central

Bacteria in the water-saturated sand of a relatively unpolluted sand beach were enumerated by direct microscope and viable counting. The number of interstitial bacteria was estimated to be a significant fraction of the total number of bacteria present. Three hundred sixty-two strains were isolated and submitted to cultural and biochemical tests. Fermentational abilities and the production of indole suggested that a significant number of these bacteria were symbiotically associated with resident metazoans. PMID:4356458

Khiyama, H. M.; Makemson, J. C.

1973-01-01

271

Feeding behaviour of the terrestrial isopod Porcellionides pruinosus Brandt, 1833 (Crustacea, Isopoda) in response to changes in food quality and contamination.  

PubMed

Soil decomposition is mainly dependent on the nature and characteristics of organic matter within the soil, the environmental conditions and the activity of microorganisms and soil fauna. Isopods play an important role in decomposition through litter fragmentation and stimulating and/or ingesting fungi and bacteria. The aim of this study was to jointly evaluate the effect of different food types and the effect of heavy metal contamination of those foods through isopod feeding performance assays. These studies used the terrestrial isopod Porcellionides pruinosus. After feeding with different leaf types for the study on feeding performance, alder leaves were chosen for the contamination experiments. Feeding parameters like consumption, assimilation, egestion and growth ratios were calculated and compared among treatments and food type. Lower quality food decreased isopods performance. Exotic food types were shown to be less preferred than alder or oak leaves. Contaminated food also resulted in a decrease in performance among the feeding parameters studies, although isopods can tolerate in certain cases high amounts of heavy metals. For this reason it is possible that in future this crustacean can be used as bioindicators of soil contamination or in the evaluation of contaminated sites or remediation processes. PMID:16842839

Loureiro, Susana; Sampaio, Alexandra; Brandão, Ana; Nogueira, António J A; Soares, Amadeu M V M

2006-10-01

272

Effects of the Alvenus oil spill on Jamaica beach macrofauna  

E-print Network

o l e l e p i s squamata and Lumbrineris parvula; a decapod, Emerita p o r t o r i c e n s i s ; an amphipod, Haustorius sp.; an isopod, Ancinus depressus; and the pelecypods, Donax spp. 15 S c o l e l e p i s squamata ( M u l l e r 1806) I t i... o l e l e p i s squamata and Lumbrineris parvula; a decapod, Emerita p o r t o r i c e n s i s ; an amphipod, Haustorius sp.; an isopod, Ancinus depressus; and the pelecypods, Donax spp. 15 S c o l e l e p i s squamata ( M u l l e r 1806) I t i...

Sweet, Merrill Henry

2012-06-07

273

Dune recovery after storm erosion on a high-energy beach: Vougot Beach, Brittany (France)  

NASA Astrophysics Data System (ADS)

On 10th March 2008, the high energy storm Johanna hit the French Atlantic coast, generating severe dune erosion on Vougot Beach (Brittany, France). In this paper, the recovery of the dune of Vougot Beach is analysed through a survey of morphological changes and hydrodynamic conditions. Data collection focused on the period immediately following storm Johanna until July 2010, i.e. over two and a half years. Results showed that the dune retreated by a maximum of almost 6 m where storm surge and wave attack were the most energetic. Dune retreat led to the creation of accommodation space for the storage of sediment by widening and elevating space between the pre- and post-storm dune toe, and reducing impacts of the storm surge. Dune recovery started in the month following the storm event and is still ongoing. It is characterised by the construction of "secondary" embryo dunes, which recovered at an average rate of 4-4.5 cm per month, although average monthly volume changes varied from - 1 to 2 m 3.m - 1 . These embryo dunes accreted due to a large aeolian sand supply from the upper tidal beach to the existing foredune. These dune-construction processes were facilitated by growth of vegetation on low-profile embryo dunes promoting backshore accretion. After more than two years of survey, the sediment budget of the beach/dune system showed that more than 10,000 m 3 has been lost by the upper tidal beach. We suggest that seaward return currents generated during the storm of 10th March 2008 are responsible for offshore sediment transport. Reconstitution of the equilibrium beach profile following the storm event may therefore have generated cross-shore sediment redistribution inducing net erosion in the tidal zone.

Suanez, Serge; Cariolet, Jean-Marie; Cancouët, Romain; Ardhuin, Fabrice; Delacourt, Christophe

2012-02-01

274

Shifts in the Microbial Community Composition of Gulf Coast Beaches Following Beach Oiling  

PubMed Central

Microorganisms associated with coastal sands serve as a natural biofilter, providing essential nutrient recycling in nearshore environments and acting to maintain coastal ecosystem health. Anthropogenic stressors often impact these ecosystems, but little is known about whether these disturbances can be identified through microbial community change. The blowout of the Macondo Prospect reservoir on April 20, 2010, which released oil hydrocarbons into the Gulf of Mexico, presented an opportunity to examine whether microbial community composition might provide a sensitive measure of ecosystem disturbance. Samples were collected on four occasions, beginning in mid-June, during initial beach oiling, until mid-November from surface sand and surf zone waters at seven beaches stretching from Bay St. Louis, MS to St. George Island, FL USA. Oil hydrocarbon measurements and NOAA shoreline assessments indicated little to no impact on the two most eastern beaches (controls). Sequence comparisons of bacterial ribosomal RNA gene hypervariable regions isolated from beach sands located to the east and west of Mobile Bay in Alabama demonstrated that regional drivers account for markedly different bacterial communities. Individual beaches had unique community signatures that persisted over time and exhibited spatial relationships, where community similarity decreased as horizontal distance between samples increased from one to hundreds of meters. In contrast, sequence analyses detected larger temporal and less spatial variation among the water samples. Superimposed upon these beach community distance and time relationships, was increased variability in bacterial community composition from oil hydrocarbon contaminated sands. The increased variability was observed among the core, resident, and transient community members, indicating the occurrence of community-wide impacts rather than solely an overprinting of oil hydrocarbon-degrading bacteria onto otherwise relatively stable sand population structures. Among sequences classified to genus, Alcanivorax, Alteromonas, Marinobacter, Winogradskyella, and Zeaxanthinibacter exhibited the largest relative abundance increases in oiled sands. PMID:24040219

Newton, Ryan J.; Huse, Susan M.; Morrison, Hilary G.; Peake, Colin S.; Sogin, Mitchell L.; McLellan, Sandra L.

2013-01-01

275

Shorebird use of an exposed sandy beach in southern California  

Microsoft Academic Search

Frequent morning surveys of birds were conducted on 1 km of beach in southern California to investigate shorebird use of an exposed sandy beach. The overall mean abundance (98.6individualskm?1), estimated biomass (9.6kgkm?1), and species richness (5.5specieskm?1) of shorebirds observed were very high for a sandy beach in the temperate zone. Eight species, sanderling (Calidris alba), semipalmated plover (Charadrius semipalmatus), marbled

David M. Hubbard; Jenifer E. Dugan

2003-01-01

276

77 FR 40541 - Safety Zone; Water Main Crossing; Choctawhatchee Bay; Santa Rosa Beach, FL  

Federal Register 2010, 2011, 2012, 2013

...Water Main Crossing; Choctawhatchee Bay; Santa Rosa Beach, FL AGENCY: Coast Guard...Intracoastal Waterway in Choctawhatchee Bay, Santa Rosa Beach, FL. This action is necessary...portion of GICW in Choctawhatchee Bay, Santa Rosa Beach, FL. This proposed...

2012-07-10

277

77 FR 56772 - Safety Zone; Water Main Crossing; Choctawhatchee Bay; Santa Rosa Beach, FL  

Federal Register 2010, 2011, 2012, 2013

...Water Main Crossing; Choctawhatchee Bay; Santa Rosa Beach, FL AGENCY: Coast Guard...Intracoastal Waterway in Choctawhatchee Bay, Santa Rosa Beach, FL. This action is necessary...portion of GICW in Choctawhatchee Bay, Santa Rosa Beach, FL. This temporary...

2012-09-14

278

77 FR 69388 - Safety Zone; Water Main Crossing; Choctawhatchee Bay; Santa Rosa Beach, FL  

Federal Register 2010, 2011, 2012, 2013

...Water Main Crossing; Choctawhatchee Bay; Santa Rosa Beach, FL AGENCY: Coast Guard...Intracoastal Waterway in Choctawhatchee Bay, Santa Rosa Beach, FL. This action is necessary...portion of GICW in Choctawhatchee Bay, Santa Rosa Beach, FL. This temporary...

2012-11-19

279

76 FR 1359 - Drawbridge Operation Regulation; Atlantic Intracoastal Waterway, Wrightsville Beach, NC  

Federal Register 2010, 2011, 2012, 2013

...the 2011 Wrightsville Beach/Quintiles Marathon will be transiting across the bridge...the 2011 Wrightsville Beach/Quintiles Marathon. DATES: This deviation is effective...The Wrightsville Beach/Quintiles Marathon Committee on behalf of the North...

2011-01-10

280

78 FR 31840 - Safety Zone; USO Patriotic Festival Air Show, Atlantic Ocean; Virginia Beach, VA  

Federal Register 2010, 2011, 2012, 2013

...Patriotic Festival Air Show, Atlantic Ocean; Virginia Beach, VA AGENCY...on the navigable waters of the Atlantic Ocean in Virginia Beach, VA. This...host an air show event over the Atlantic Ocean in Virginia Beach, VA. In...

2013-05-28

281

77 FR 50065 - Safety Zone; Jacksonville Sea and Sky Spectacular, Atlantic Ocean; Jacksonville Beach, FL  

Federal Register 2010, 2011, 2012, 2013

...Jacksonville Sea and Sky Spectacular, Atlantic Ocean; Jacksonville Beach, FL AGENCY...safety zone on the waters of the Atlantic Ocean east of Jacksonville Beach, Florida...host an air show event over the Atlantic Ocean in Jacksonville Beach, FL....

2012-08-20

282

78 FR 22814 - Special Local Regulations; Miami Super Boat Grand Prix, Atlantic Ocean; Miami Beach, FL  

Federal Register 2010, 2011, 2012, 2013

...Miami Super Boat Grand Prix, Atlantic Ocean; Miami Beach, FL AGENCY: Coast...special local regulation on the Atlantic Ocean east of Miami Beach, Florida...will be held on the waters of the Atlantic Ocean east of Miami Beach,...

2013-04-17

283

33 CFR 165.T05-0741 - Safety Zone, Atlantic Intracoastal Waterway; Carolina Beach, NC.  

Code of Federal Regulations, 2013 CFR

...Atlantic Intracoastal Waterway; Carolina Beach, NC. 165.T05-0741 Section 165...Atlantic Intracoastal Waterway; Carolina Beach, NC. (a) Regulated area. The...Intracoastal Waterway, mile 295.6, at Carolina Beach, North Carolina (34°03?21? N,...

2013-07-01

284

Public perception of beach quality: lessons learnt from a French case study Virginie DUVAT  

E-print Network

Public perception of beach quality: lessons learnt from a French case study 000 La Rochelle - FRANCE virginie.duvat@univ-lr.fr Keywords: beach quality to be highly valuable for beach management as they are holistic (incorporating all

Paris-Sud XI, Université de

285

33 CFR 263.26 - Small beach erosion control project authority (Section 103).  

Code of Federal Regulations, 2011 CFR

...2011-07-01 2011-07-01 false Small beach erosion control project authority (Section...Protection Policy § 263.26 Small beach erosion control project authority (Section...undertake construction of small shore and beach restoration and protection...

2011-07-01

286

33 CFR 165.T05-1082 - Safety Zone; Atlantic Intracoastal Waterway, Wrightsville Beach, NC.  

Code of Federal Regulations, 2013 CFR

...Atlantic Intracoastal Waterway, Wrightsville Beach, NC. 165.T05-1082 Section 165...Atlantic Intracoastal Waterway, Wrightsville Beach, NC. (a) Regulated area. The...Waterway, mile 283.1, at Wrightsville Beach, North Carolina (34°13?07?...

2013-07-01

287

33 CFR 263.26 - Small beach erosion control project authority (Section 103).  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false Small beach erosion control project authority (Section...Protection Policy § 263.26 Small beach erosion control project authority (Section...undertake construction of small shore and beach restoration and protection...

2013-07-01

288

36 CFR 3.17 - What regulations apply to swimming areas and beaches?  

Code of Federal Regulations, 2010 CFR

... false What regulations apply to swimming areas and beaches? 3.17 Section...3.17 What regulations apply to swimming areas and beaches? (a) The superintendent may designate areas as swimming areas or swimming beaches in...

2010-07-01

289

Breeding biology and microhabitat utilization of the intertidal isopod Idotea granulosa Rathke, in the Irish Sea  

NASA Astrophysics Data System (ADS)

The life history and distribution of the intertidal isopod Idotea granulosa were investigated at five rocky shore biotopes in the Isle of Man. I. granulosa breeds throughout the year in the Irish Sea. The breeding activity is highest in the early summer after the sexual maturation of the overwintered animals. At that period about 4% of the females were infested by Clypeoniscus sp. (Isopoda) which destroys the brood. A small proportion of the juveniles released in the early summer mature and breed in the autumn. In the winter Idotea populations consisted of juveniles, immature adults and old individuals which produce another brood. These large sized animals die off before the summer. Consequently, the age and size of the breeding I. granulosa fluctuates seasonally. The number of eggs is linearly related to the female length. The fecundity is highest in the spring and lowest in the autumn in all female size classes. I. granulosa inhabits an array of structurally different intertidal algae including the filamentous Cladophora rupestris, understory turfs Gigartina stellata, Laurencia pinnatifida and Corallina officinalis and the fucoids Fucus serratus and Ascophyllum nodosum. The distribution pattern of I. granulosa in examined intertidal communities is modified by the physiognomy of the algal microhabitats, by seasonal and spatial variation in wave agitation and by the breeding cycle of the population itself. Both the life history characteristics and distribution patterns are explained as adaptations to the spatially and temporally heterogeneous intertidal shores.

Salemaa, Heikki

1986-03-01

290

Spermiophagic activity in the female genital system of some species of terrestrial isopods (Crustacea, Halophilosciidae).  

PubMed

The females of some species of the family Halophilosciidae receive in the course of mating a quantity of sperm considerably redundant with respect to the number of eggs that can be fertilized; this is possible thanks to the peculiar morpho-functional organization that characterizes their genital system and that allows them to store the sperm not only in the great seminal receptacle but also within the ovary. While most of the sperm stay free in the lumen of the seminal receptacle, a part of those present in the ovary undergoes a process of capture by the follicular cells with consequent internalization within endocellular cavities. This process concerns exclusively the immotile tail, that characterizes the peculiar spermatozoon of the isopods and which is essentially of proteic nature. After their capture the sperm tails undergo a gradual process of digestion, which seems to be apparently realized without the intervention of lysosomes. The possible role of this spermiophagic activity might be to represent a significant trophic paternal investment aimed at improving the fitness of the female and of the offsprings. PMID:24947800

Mazzei, Veronica; Longo, Guglielmo; Brundo, Maria Violetta

2014-08-01

291

Multi-infections of feminizing Wolbachia strains in natural populations of the terrestrial isopod Armadillidium vulgare.  

PubMed

Maternally inherited Wolbachia (?-Proteobacteria) are widespread parasitic reproductive manipulators. A growing number of studies have described the presence of different Wolbachia strains within a same host. To date, no naturally occurring multiple infections have been recorded in terrestrial isopods. This is true for Armadillidium vulgare which is known to harbor non simultaneously three Wolbachia strains. Traditionally, such Wolbachia are detected by PCR amplification of the wsp gene and strains are characterized by sequencing. The presence of nucleotide deletions or insertions within the wsp gene, among these three different strains, provides the opportunity to test a novel genotyping method. Herein, we designed a new primer pair able to amplify products whose lengths are specific to each Wolbachia strain so as to detect the presence of multi-infections in A. vulgare. Experimental injections of Wolbachia strains in Wolbachia-free females were used to validate the methodology. We re-investigated, using this novel method, the infection status of 40 females sampled in 2003 and previously described as mono-infected based on the classical sequencing method. Among these females, 29 were identified as bi-infected. It is the first time that naturally occurring multiple infections of Wolbachia are detected within an individual A. vulgare host. Additionally, we resampled 6 of these populations in 2010 to check the infection status of females. PMID:24324814

Valette, Victorien; Bitome Essono, Paul-Yannick; Le Clec'h, Winka; Johnson, Monique; Bech, Nicolas; Grandjean, Frédéric

2013-01-01

292

Inverted repeats and genome architecture conversions of terrestrial isopods mitochondrial DNA.  

PubMed

Mitochondrial DNA (mtDNA) is usually depicted as a circular molecule, however, there is increasing evidence that linearization of mtDNA evolved independently many times in organisms such as fungi, unicellular eukaryotes, and animals. Recent observations in various models with linear mtDNA revealed the presence of conserved inverted repeats (IR) at both ends that, when they become single-stranded, may be able to fold on themselves to create telomeric-hairpins involved in genome architecture conversions. The atypical mtDNA of terrestrial isopods (Crustacea: Oniscidea) composed of linear monomers and circular dimers is an interesting model to study genome architecture conversions. Here, we present the mtDNA control region sequences of two species of the genus Armadillidium: A. vulgare and A. pelagicum. All features of arthropods mtDNA control regions are present (origin of replication, poly-T stretch, GA and TA-rich blocks and one variable domain), plus a conserved IR. This IR can potentially fold into a hairpin structure and is present in two different orientations among the A. vulgare populations: either in one sense or in its reverse complement. This polymorphism, also observed in a single individual (heteroplasmy), might be a signature of genome architecture conversions from linear to circular monomeric mtDNA via successive opening and closing of the molecules. PMID:24068302

Doublet, Vincent; Helleu, Quentin; Raimond, Roland; Souty-Grosset, Catherine; Marcadé, Isabelle

2013-09-01

293

Molecular insight into lignocellulose digestion by a marine isopod in the absence of gut microbes  

PubMed Central

The digestion of lignocellulose is attracting attention both in terms of basic research into its metabolism by microorganisms and animals, and also as a means of converting plant biomass into biofuels. Limnoriid wood borers are unusual because, unlike other wood-feeding animals, they do not rely on symbiotic microbes to help digest lignocellulose. The absence of microbes in the digestive tract suggests that limnoriid wood borers produce all the enzymes necessary for lignocellulose digestion themselves. In this study we report that analysis of ESTs from the digestive system of Limnoria quadripunctata reveals a transcriptome dominated by glycosyl hydrolase genes. Indeed, > 20% of all ESTs represent genes encoding putative cellulases, including glycosyl hydrolase family 7 (GH7) cellobiohydrolases. These have not previously been reported in animal genomes, but are key digestive enzymes produced by wood-degrading fungi and symbiotic protists in termite guts. We propose that limnoriid GH7 genes are important for the efficient digestion of lignocellulose in the absence of gut microbes. Hemocyanin transcripts were highly abundant in the hepatopancreas transcriptome. Based on recent studies indicating that these proteins may function as phenoloxidases in isopods, we discuss a possible role for hemocyanins in lignin decomposition. PMID:20212162

King, Andrew J.; Cragg, Simon M.; Li, Yi; Dymond, Jo; Guille, Matthew J.; Bowles, Dianna J.; Bruce, Neil C.; Graham, Ian A.; McQueen-Mason, Simon J.

2010-01-01

294

A cryofixation study of presumptive hygroreceptors on the antennule of a terrestrial isopod.  

PubMed

The structure of the apical sensilla on the antennule of the terrestrial isopod Porcellio scaber was examined in cryofixed and freeze substituted (CRF) and chemically fixed and dehydrated (CHF) material. CRF specimens generally showed a preservation superior to CHF material. Only in deeper regions did the tissue show damage from freezing. Each of the 13-22 sensilla contains two sensory cells. In contrast to earlier reports, it was observed that the dendritic segments of these cells are arranged in a unique, concentric manner. In CRF specimens the dendrites reach the tip of the sensilla and border upon the innermost layer of the complicated wall of the peg which is not pierced by pores. Silver-protein and lanthanum failed to penetrate the wall of the sensilla and also did not reach the dendrites via an apical pore, which therefore is regarded as a molting pore. The lymph spaces which, in CHF specimens, are observed around the dendrites and beneath the cuticle within the antennal tip are regarded as artefactual. From similarities in the dendritic structures to insect hygroreceptors and their relationship to the adjoining cuticle it can be assumed that the antennular sensilla in Porcellio are sensitive to humidity changes. Mechanoreception and chemoreception, however, cannot entirely be excluded as possible functions. PMID:6379986

Haug, T; Altner, H

1984-01-01

295

Diel variation in ammonia excretion, glutamine levels, and hydration status in two species of terrestrial isopods.  

PubMed

Terrestrial isopods (suborder Oniscidea) excrete most nitrogen diurnally as volatile ammonia, and ammonia-loaded animals accumulate nonessential amino acids, which may constitute the major nocturnal nitrogen pool. This study explored the relationship between ammonia excretion, glutamine storage/mobilization, and water balance, in two sympatric species Ligidium lapetum (section Diplocheta), a hygric species; and Armadillidium vulgare (Section Crinocheta), a xeric species capable of water-vapor absorption (WVA). Ammonia excretion (12-h), tissue glutamine levels, and water contents were measured following field collection of animals at dusk and dawn. In both species, diurnal ammonia excretion exceeded nocturnal excretion four- to fivefold while glutamine levels increased four- to sevenfold during the night. Most glutamine was accumulated in the somatic tissues ("body wall"). While data support the role of glutamine in nocturnal nitrogen storage, potential nitrogen mobilization from glutamine breakdown (162 micromol g(-1) in A. vulgare) exceeds measured ammonia excretion (2.5 micromol g(-1)) over 60-fold. This may serve to generate the high hemolymph ammonia concentrations (and high P(NH3)) seen during volatilization. The energetic cost of ammonia volatilization is discussed in the light of these findings. Mean water contents were similar at dusk and dawn in both species, indicating that diel cycles of water depletion and replenishment were not occurring. PMID:15578188

Wright, Jonathan C; Peña-Peralta, Mariasol

2005-01-01

296

Variations of immune parameters in terrestrial isopods: a matter of gender, aging and Wolbachia  

NASA Astrophysics Data System (ADS)

Ecological factors modulate animal immunocompetence and potentially shape the evolution of their immune systems. Not only environmental parameters impact on immunocompetence: Aging is one major cause of variability of immunocompetence between individuals, and sex-specific levels of immunocompetence have also been frequently described. Moreover, a growing core of data put in light that vertically transmitted symbionts can dramatically modulate the immunocompetence of their hosts. In this study, we addressed the influence of gender, age and the feminising endosymbiont Wolbachia ( wVulC) on variations in haemocyte density, total PO activity and bacterial load in the haemolymph of the terrestrial isopod Armadillidium vulgare. This host-symbiont system is of particular interest to address this question since: (1) wVulC was previously shown as immunosuppressive in middle-aged females and (2) wVulC influences sex determination. We show that age, gender and Wolbachia modulate together immune parameters in A. vulgare. However, wVulC, which interacts with aging, appears to be the prominent factor interfering with both PO activity and haemocyte density. This interference with immune parameters is not the only aspect of wVulC virulence on its host, as reproduction and survival are also altered.

Sicard, Mathieu; Chevalier, Frédéric; de Vlechouver, Mickaël; Bouchon, Didier; Grève, Pierre; Braquart-Varnier, Christine

2010-09-01

297

Developmental changes in heart photosensitivity of the isopod crustacean Ligia exotica.  

PubMed

During juvenile development, the cardiac pacemaker of the isopod crustacean Ligia exotica is transferred from the myocardium to the cardiac ganglion of the neurogenic heart. In adult, light stimulus decreases the beat frequency of the heart. To elucidate developmental changes in the photosensitivity of the juvenile Ligia heart, we examined the effect of a light stimulus on the semi-isolated heart of juveniles at various developmental stages by the recording membrane potential of the myocardium. We also examined the effect of hyperpolarizing current injection into the myocardium, because this causes different effects on the beat frequency between myogenic and neurogenic hearts. In newly hatched juveniles, beat frequency decreased upon current injection but exhibited no response to white light. In contrast, 10 days after hatching, beat frequency did not change upon current injection, but decreased in response to white light. The heart photoresponse of juveniles was reversibly eliminated by application of tetrodotoxin, which changes the heartbeat from neurogenic to myogenic by suppressing cardiac ganglion activity. The proportion of juveniles exhibiting a heart photoresponse increased gradually up to 100% during the period between 3 and 10 days after hatching. The results suggest that the heart photoresponse of L. exotica appears in association with transfer of the cardiac pacemaker from the myocardium to the cardiac ganglion during juvenile development. PMID:17551248

Miyamoto, Hiroshi; Horiguchi, Hiroko; Hariyama, Takahiko; Yamagishi, Hiroshi

2007-03-01

298

Diel ontogenetic shift in parasitic activity in a gnathiid isopod on Caribbean coral reefs  

NASA Astrophysics Data System (ADS)

Ontogenetic niche shifts are characteristic of organisms with complex life cycles such as many marine invertebrates. Research has focused primarily on changes in habitat or diet. However, ontogenetic changes can also occur in the temporal pattern of foraging. Gnathiid isopods feed on fish blood throughout their larval stages and are the primary food item for cleaning organisms on coral reefs. At sites in Australia and the Caribbean, gnathiid larvae exhibit size-related differences in diel activity. However, it is unclear whether this is due to interspecific or intraspecific variation in behavior. Fish were deployed in cages near sunset on shallow reefs off St. John, U.S. Virgin Islands and allowed to be infected with larval gnathiids. Larvae collected from fish retrieved near midnight developed into adults, with most developing into females. In contrast, approximately 80% of gnathiids collected after first light developed into second or third stage larvae, and nearly all of the remaining, large, individuals developed into males. Comparison of ITS2 gene regions from individuals collected in emergence traps from the same reefs during the day versus during the night revealed no differences in this highly variable region. Thus, gnathiid larvae at this locality shift their time of activity as they develop, and larvae developing into males remain active over a longer time period than those developing into females.

Sikkel, P. C.; Ziemba, R. E.; Sears, W. T.; Wheeler, J. C.

2009-06-01

299

Pteridines in the yellow-colored chromatophores of the isopod, Armadillidium vulgare.  

PubMed

Biochemical analyses of the dorsal integument of the isopod, Armadillidium vulgare, revealed that sepiapterin, biopterin, pterin, isoxanthopterin and uric acid accumulated in the yellow-colored chromatophores which are distinguishable from ommochrome chromatophores. The pattern of the yellow-colored chromatophores in the female is externally observable at the dorsal surface of the integument as yellow markings. In contrast, the yellow-colored chromatophores are not externally observable in the male, since they are covered by an ommochrome chromatophore layer. The content of both sepiapterin and biopterin in the male chromatophores was about two times greater than that in the female. The yellow-colored chromatophores were observable by light microscopy as pigmented granules. Electron microscopy showed that morphological properties of the granules were similar to those of pteridine granules which contain uric acid occurring in the silkworm integument. These facts indicate that both pteridines and uric acid in the integument of A. vulgare are localized in the pigmented granules of the yellow-colored chromatophores. PMID:1292511

Nakagoshi, M; Takikawa, S; Negishi, S; Tsusué, M

1992-12-01

300

Multi-Infections of Feminizing Wolbachia Strains in Natural Populations of the Terrestrial Isopod Armadillidium Vulgare  

PubMed Central

Maternally inherited Wolbachia (?-Proteobacteria) are widespread parasitic reproductive manipulators. A growing number of studies have described the presence of different Wolbachia strains within a same host. To date, no naturally occurring multiple infections have been recorded in terrestrial isopods. This is true for Armadillidium vulgare which is known to harbor non simultaneously three Wolbachia strains. Traditionally, such Wolbachia are detected by PCR amplification of the wsp gene and strains are characterized by sequencing. The presence of nucleotide deletions or insertions within the wsp gene, among these three different strains, provides the opportunity to test a novel genotyping method. Herein, we designed a new primer pair able to amplify products whose lengths are specific to each Wolbachia strain so as to detect the presence of multi-infections in A. vulgare. Experimental injections of Wolbachia strains in Wolbachia-free females were used to validate the methodology. We re-investigated, using this novel method, the infection status of 40 females sampled in 2003 and previously described as mono-infected based on the classical sequencing method. Among these females, 29 were identified as bi-infected. It is the first time that naturally occuring multiple infections of Wolbachia are detected within an individual A. vulgare host. Additionally, we resampled 6 of these populations in 2010 to check the infection status of females. PMID:24324814

Valette, Victorien; Bitome Essono, Paul-Yannick; Le Clec'h, Winka; Johnson, Monique; Bech, Nicolas; Grandjean, Frederic

2013-01-01

301

Variations of immune parameters in terrestrial isopods: a matter of gender, aging and Wolbachia.  

PubMed

Ecological factors modulate animal immunocompetence and potentially shape the evolution of their immune systems. Not only environmental parameters impact on immunocompetence: Aging is one major cause of variability of immunocompetence between individuals, and sex-specific levels of immunocompetence have also been frequently described. Moreover, a growing core of data put in light that vertically transmitted symbionts can dramatically modulate the immunocompetence of their hosts. In this study, we addressed the influence of gender, age and the feminising endosymbiont Wolbachia (wVulC) on variations in haemocyte density, total PO activity and bacterial load in the haemolymph of the terrestrial isopod Armadillidium vulgare. This host-symbiont system is of particular interest to address this question since: (1) wVulC was previously shown as immunosuppressive in middle-aged females and (2) wVulC influences sex determination. We show that age, gender and Wolbachia modulate together immune parameters in A. vulgare. However, wVulC, which interacts with aging, appears to be the prominent factor interfering with both PO activity and haemocyte density. This interference with immune parameters is not the only aspect of wVulC virulence on its host, as reproduction and survival are also altered. PMID:20676599

Sicard, Mathieu; Chevalier, Frédéric; De Vlechouver, Mickaël; Bouchon, Didier; Grève, Pierre; Braquart-Varnier, Christine

2010-09-01

302

An experimental field test of susceptibility to ectoparasitic gnathiid isopods among Caribbean reef fishes.  

PubMed

Susceptibility to infestation by a gnathiid isopod (Gnathia marleyi: Crustacea: Isopoda) was examined among 16 species from 9 families and 3 orders of common Caribbean reef fishes off St. John, United States Virgin Islands. Fish were placed in cages during times of peak gnathiid activity. Individuals from most (n=14) species were compared against a single species (French Grunt, Haemulon flavolineatum) that served as a standard and effectively controlled for the effects of habitat and variation in gnathiid abundance on exposure to and the likelihood and intensity of host infestation by gnathiids. All species were susceptible to infestation by gnathiids, with individual hosts harbouring up to 368 gnathiids. However, there was significant variation in levels of infestation among the 14 comparison species. Controlling for body size, nocturnal species from the families Haemulidae and Lutjanidae had the highest gnathiid infestation. Our finding that haemulids and lutjanids are particularly susceptible has important implications for the role of gnathiids in Caribbean reef food webs, given the role members of these families play in trophic connectivity between reefs and associated habitats. To our knowledge this is the first manipulative field study to examine variation among potential hosts in susceptibility to an ectoparasite in any terrestrial or aquatic system and is the greatest number of teleost hosts documented for any gnathiid species. PMID:23506839

Coile, A M; Sikkel, P C

2013-06-01

303

Cannibalism and predation as paths for horizontal passage of Wolbachia between terrestrial isopods.  

PubMed

The alpha-proteobacteria Wolbachia are the most widespread endosymbionts in arthropods and nematodes. Mainly maternally inherited, these so-called sex parasites have selected several strategies that increase their vertical dispersion in host populations. However, the lack of congruence between the Wolbachia and their host phylogenies suggests frequent horizontal transfers. One way that could be used for horizontal Wolbachia transfers between individuals is predation. The aim of this study was to test whether horizontal passage of Wolbachia is possible when an uninfected terrestrial isopod eats an infected one. After having eaten Armadillidium vulgare harbouring Wolbachia, the predator-recipients (the two woodlice A. vulgare and Porcellio dilatatus dilatatus) that were initially Wolbachia-free were tested positive for the presence of Wolbachia both by quantitative PCR and Fluorescence in situ Hybridization (FISH). Even if the titers were low compared to vertically infected individuals, this constitutes the first demonstration of Wolbachia occurrence in various organs of an initially uninfected host after eating an infected one. PMID:23593179

Le Clec'h, Winka; Chevalier, Frédéric D; Genty, Lise; Bertaux, Joanne; Bouchon, Didier; Sicard, Mathieu

2013-01-01

304

Cannibalism and Predation as Paths for Horizontal Passage of Wolbachia between Terrestrial Isopods  

PubMed Central

The alpha-proteobacteria Wolbachia are the most widespread endosymbionts in arthropods and nematodes. Mainly maternally inherited, these so-called sex parasites have selected several strategies that increase their vertical dispersion in host populations. However, the lack of congruence between the Wolbachia and their host phylogenies suggests frequent horizontal transfers. One way that could be used for horizontal Wolbachia transfers between individuals is predation. The aim of this study was to test whether horizontal passage of Wolbachia is possible when an uninfected terrestrial isopod eats an infected one. After having eaten Armadillidium vulgare harbouring Wolbachia, the predator-recipients (the two woodlice A. vulgare and Porcellio dilatatus dilatatus) that were initially Wolbachia-free were tested positive for the presence of Wolbachia both by quantitative PCR and Fluorescence in situ Hybridization (FISH). Even if the titers were low compared to vertically infected individuals, this constitutes the first demonstration of Wolbachia occurrence in various organs of an initially uninfected host after eating an infected one. PMID:23593179

Le Clec'h, Winka; Chevalier, Frederic D.; Genty, Lise; Bertaux, Joanne; Bouchon, Didier; Sicard, Mathieu

2013-01-01

305

Quantitative assessment of effects of zinc on the histological structure of the hepatopancreas of terrestrial isopods.  

PubMed

The objective of this study was to quantify the effects of zinc exposure on the histological structure of the hepatopancreas of Porcellio laevis. Woodlice were experimentally exposed to various concentrations (1000, 4000, and 8000 mg. kg(-1)) of zinc sulphate. Hepatopancreas samples of exposed isopods were histologically prepared and analysed with Leica QWin image analysis software. The B-cells in hepatopancreases of zinc sulphate - exposed woodlice were reduced in size to varying degrees, compared to that of the control, Percentage Cellular Area (PCA) of the hepatopancreas samples revealed that zoning occurred through the length of hepatopancreas lobes. Analysis of the PCA data of hepatopancreases of P. laevis exposed to the zinc sulphate revealed that there was a decline in PCA, in all the zones, compared to those in the control. The Z3 zone (the part from the middle to three quarters to the back of the tubule) was shown to be the best suited, if PCAs are to be considered as a biomarker in woodlouse toxicity studies. PMID:17612782

Odendaal, J P; Reinecke, A J

2007-10-01

306

Effect of forced fasting on magnesium and manganese regulation in a terrestrial isopod, Porcellio spinicornis Say  

SciTech Connect

The amount of toxic and non-toxic elements assimilated by primary consumers from their environment depends as much on the form, as on concentration of these elements in the food. In superficially contaminated sites, the majority of elements detected in plant material are present as a blanket deposit of fine particles on leaf surfaces, and these are easily removed as the consumed material passes through the alimentary canal. In contrast, trace metals stored in the plant tissue are not readily available as they have been taken up via roots and are firmly bound within the plant tissue. Earlier studies have shown that mean concentrations of magnesium (Mg) and manganese (Mn) in whole woodlice are correlated with levels in their diet. Both metals are regulated by terrestrial isopods during their intermoult- and moult-cycles. The present study provides information on the regulation of Mg and Mn tissue concentrations during forced fasting in adult, intermoult male and female Porcellio spinicornis Say (Porcellionidae, Isopoda). Mg, the principal cation in the soft tissues is a well known activator of many enzymes of the glycolytic systems. Mn, on the other hand, plays a special role in digestive and catabolic processes.

Bercovitz, K.; Alikhan, M.A. (Laurentian Univ., Sudbury, Ontario (Canada))

1989-07-01

307

Beyond beach width: Steps toward identifying and integrating ecological envelopes with geomorphic features and datums for sandy beach ecosystems  

NASA Astrophysics Data System (ADS)

Our understanding of ecological responses to climatic and anthropogenic forcing lags far behind that of physical or geomorphic responses for beach ecosystems. Reconciling geomorphic features of beaches with ecological features, such as intertidal zones and mobile biota that are not described by beach width alone, could help address this issue. First, although intertidal zones characterized by distinct groups of mobile burrowing animals are described for beaches, the locations and elevations of these zones do not coincide with standard shoreline datums. Second, intertidal zonation on beaches is extremely dynamic due to the combination of unstable sandy substrate and a highly mobile biota; shifting strongly with tides, waves, storms, and beach conditions. We propose that beach biota use ecological "envelopes" of cross-shore habitat to cope with constantly changing beach conditions. We estimated the extent of these "envelopes" for a variety of taxa on tidal to daily, semi-lunar and seasonal to annual time scales, using literature values on cross-shore animal movements and a field study of the positions of intertidal beds of two species of typical mid and upper shore beach invertebrates. Daily or tidal cross-shore movement varied most (1 m to 100 m) with daily "envelopes" covering 7% to 85% of the available beach width. Semi-lunar movement (12 m) and envelopes (28%) were relatively small, while estimated annual "envelopes" were large, averaging 61% of beach width. The large scope of annual ecological envelopes relative to beach widths reflects how intertidal animals escape seasonally extreme or episodically harsh conditions. Intertidal bed positions of a talitrid amphipod and an opheliid polychaete correlated well with selected beach features in our field study suggesting that incorporation of ecological envelopes in models of shoreline evolution may be feasible. Describing ecological zones in terms of more dynamic shoreline features, such as total water level (TWL) that incorporate wave setup and runup, may be particularly applicable to upper intertidal biota whose distributions closely followed the high tide strand line (HTS), a feature which tracks total water level (TWL). Developing a TWL approach may also provide new insights on habitat availability for beach nesting wildlife and coastal strand vegetation. Conservation of beach ecosystems could be enhanced by incorporating sufficient beach habitat to accommodate the dynamic ecological envelopes used by mobile intertidal invertebrates and wildlife.

Dugan, Jenifer E.; Hubbard, David M.; Quigley, Brenna J.

2013-10-01

308

77 FR 13519 - Safety Zone; Virginia Beach Oceanfront Air Show, Atlantic Ocean, Virginia Beach, VA  

Federal Register 2010, 2011, 2012, 2013

...waters of the Atlantic Ocean bounded by the following...portion of the Atlantic Ocean from 11 a.m. until...Act, and the Endanger Species Act an environmental...that may lead to the discovery of a significant environmental...Oceanfront Air Show, Atlantic Ocean, Virginia Beach,...

2012-03-07

309

The health effects of swimming at Sydney beaches. The Sydney Beach Users Study Advisory Group.  

PubMed Central

OBJECTIVES. The purpose of the study was to determine the health risks of swimming at ocean beaches in Sydney, Australia. METHODS. From people attending 12 Sydney beaches in the period from December 5, 1989 to February 26, 1990, we recruited a cohort of 8413 adults who agreed to participate in this study. Of these, 4424 were excluded either because they had been swimming in the previous 5 days or because they reported a current illness. Of the remainder, 2839 successfully completed a follow-up telephone interview conducted within 10 days after recruitment. We recorded reported respiratory, gastrointestinal, eye, and ear symptoms and fever that occurred within the 10 days between initial interview on the beach and the follow-up interview. RESULTS. A total of 683 participants (24.0%) reported experiencing symptoms in the 10 days following initial interview. Of these, 435 (63.7%) reported respiratory symptoms. Swimmers were almost twice as likely as nonswimmers to report symptoms. There was a linear relationship between water pollution and all reported symptoms with the exception of gastrointestinal complaints. CONCLUSIONS. Swimmers at Sydney ocean beaches are more likely to report respiratory, ear, and eye symptoms than beachgoers who do not swim. The incidence of these symptoms increases slightly with increasing levels of pollution. PMID:8259798

Corbett, S J; Rubin, G L; Curry, G K; Kleinbaum, D G

1993-01-01

310

Predicting the effect of beach nourishment and cross-shore sediment variation on beach morphodynamic assessment  

Microsoft Academic Search

Studies of coastal morphodynamics are becoming increasingly more focused on quantification of relationships between processes, form and function of dynamic landform systems because wave climates (e.g., wave height, wave period, seasonality, cyclical patterns) and sediments (i.e., composition, size, and shape) interact in various ways to collectively produce distinctive types of beaches. This paper identifies criteria and boundary conditions that characterize

Lindino Benedet; Charles W. Finkl; Thomas Campbell; Antonio Klein

2004-01-01

311

Campus Planning Study for Daytona Beach Junior College, Daytona Beach, Florida.  

ERIC Educational Resources Information Center

Major considerations and findings are presented in regard to the updating of a long range campus plan for the development of buildings, parking areas, drives and sidewalks at Daytona Beach Junior College. Following a consideration of the background and program of the college, a site analysis is presented. Plans and recommendations are offered…

Caudill, Rowlett and Scott, Architects, Houston, TX.

312

NOWCASTING AND FORECASTING BEACH BACTERIA CONCENTRATION USING THE EPA VIRTUAL BEACH SOFTWARE  

EPA Science Inventory

Beaches are subject to closure when bacterial counts exceed water quality criteria. Many authorities base these decisions on sample counts, which typically require a day or more to analyze. Sometimes called the persistence model, because conditions are assumed to persist, experie...

313

Beach ridge plains and sea level change  

SciTech Connect

Beach ridge systems of the low-to-moderate energy swash-built type can be used to determine ambient near-shore wave energy values, as well as sea level changes up to 4--5 m. Wave energy values can be obtained from individual samples or mean values of individual samples, the grain-size kurtosis (inverted) is useful, as is the sixth moment measure. Sea level change information comes from sequences of beach ridge samples, spanning one or more abrupt changes in smoothed kurtosis. Other procedures are also available for each of these tasks. Settling-lag ridges (horizontal bedding) may be useful also. Dune ridges and storm-surge ridges are not appropriate for this kind of work. There are also limitations on nature and general size of the sediment in the ridge (preferably quartz sand or coarse silt; 50-gram samples), and on map geometry of the system (no sharp curvature, no splaying; parallelism or nearly so). Sampling must meet strict standards as to location, depth and thickness of the sampled layer: lab work requires 30-minute sieving on quarter-phi screens. Each beach ridge represents a sea level rise and then fall, perhaps 5 to 30 cm, over a few years or decades, but not a storm. The longest presently-known sequence of beach ridge is located in an area of slow glacio-isostatic rebound, and spans some 12,000 years, but ridge systems in stable areas cover only about 3,200 years or less. Each long system typically shows many changes of sea level, in the range of one to 4--5 meters, but there does not appear to be any clearly-marked periodicity that persists throughout the entire record, other than the time interval between the ridges themselves. This interval commonly averages 35--50 years, but in a few settings is only about four years, and in others 10--12. In a few instances, the interval may be 60 years or more.

Tanner, W.F. (Florida State Univ., Tallahassee, FL (United States))

1993-03-01

314

Facilitation and predation structure a grassland detrital food web: the responses of soil nematodes to isopod processing of litter.  

PubMed

1. Detritus can support successive consumers, whose interactions may be structured by changes in the condition of their shared resource. One model of such species interactions is a processing chain, in which consumers feeding on the resource in a less processed state change the resource condition for subsequent consumers. 2. In a series of experiments, the hypothesis was tested that a common detritivore, the terrestrial isopod Porcellio scaber, affects soil nematodes through the processing of plant litter. Different detrital resources were added to soil from a California coastal prairie in order to simulate litter processing by the detritivore. Treatments that included only whole grass litter corresponded to detrital food webs lacking detritivores, while treatments that included mixtures of P. scaber faeces and grass litter corresponded to different densities or feeding rates of P. scaber. 3. Simulated litter processing by P. scaber increased the abundance of bacterivorous nematodes by between 32% and 202% after 24-44 days in laboratory experiments, but had no effect on fungivorous or predaceous nematodes. 4. In a subsequent field experiment, however, fungivorous nematodes were suppressed by isopod litter processing while bacterivores showed no response. Instead, P. scaber processing of litter increased the abundance of predaceous nematodes in the field experiment by 176%. 5. When simulated litter processing of litter was crossed in laboratory experiments with predaceous nematode addition (comparable to the response of predators in the field experiment), the abundance of bacterivores was increased by isopod processing of litter (by an average of 122%), but suppressed by elevated densities of predaceous nematodes (by an average of 41%). 6. This suggests that litter processing by P. scaber facilitates the bacterial channel of the soil food web, but that predaceous nematodes suppress the response of bacterivores in the field. Processing chain interactions may, therefore, be important in understanding the relative importance of bacterial and fungal channels in the soil food web, while top-down effects of predators determine the resulting changes in population abundance and biomass. PMID:21561453

Bastow, Justin L

2011-09-01

315

Long-term toxicity of five polycyclic aromatic hydrocarbons for the terrestrial isopods Oniscus asellus and Porcellio scaber  

SciTech Connect

Polycyclic aromatic hydrocarbons (PAHs) are a common component of soil pollution, yet little is known of the ecotoxicological risks these compounds may pose to life in soil. This article reports the ecotoxicity of five PAHs for two terrestrial isopod species. Isopods were exposed to food contaminated with four different concentrations of either fluorene, phenanthrene, fluoranthene (up to 4 {micro}mol/g), benz[a]anthracene, or benzo[a]pyrene (up to 1.25 {micro}mol/.g). Exposure of Porcellio scaber lasted 16 weeks, and no adverse effects on survival, growth, or total protein (only females tested) were observed in any of the treatments. A small but significant reduction in growth of Oniscus asellus was observed at 47 weeks of exposure to 0.125 {micro}mol benz[a]anthracene-g{sup {minus}1} dry weight and higher concentrations. A significant stimulation of the reproduction of O. asellus was observed in some of the phenanthrene, fluoranthene, benz[a]anthracene, and benzo[a]pyrene treatments; a larger proportion of the females were gravid, which resulted in a higher number of juveniles per female. Exposure did not significantly affect brood size, weight of the mother after release of the juveniles, or the survival of the juveniles upon starvation. Total protein content of females was significantly reduced at 0.4 {micro}mol fluorene g{sup {minus}1} dry weight and higher concentrations. Growth and protein content of isopods is likely to be affected by PAH exposure only at highly contaminated sites. The ecological consequences of stimulated reproduction and possible DNA damage are poorly understood and require further attention because soil invertebrates may be exposed to PAHs over many generations.

Brummelen, T.C. van; Gestel, C.A.M. van; Verweij, R.A. [Vrije Univ., Amsterdam (Netherlands). Dept. of Ecology and Ecotoxicology

1996-07-01

316

Contrasting phylogeography of sandy vs. rocky supralittoral isopods in the megadiverse and geologically dynamic Gulf of California and adjacent areas.  

PubMed

Phylogeographic studies of animals with low vagility and restricted to patchy habitats of the supralittoral zone, can uncover unknown diversity and shed light on processes that shaped evolution along a continent's edge. The Pacific coast between southern California and central Mexico, including the megadiverse Gulf of California, offers a remarkable setting to study biological diversification in the supralittoral. A complex geological history coupled with cyclical fluctuations in temperature and sea level provided ample opportunities for diversification of supralittoral organisms. Indeed, a previous phylogeographic study of Ligia, a supralittoral isopod that has limited dispersal abilities and is restricted to rocky patches, revealed high levels of morphologically cryptic diversity. Herein, we examined phylogeographic patterns of Tylos, another supralittoral isopod with limited dispersal potential, but whose habitat (i.e., sandy shores) appears to be more extensive and connected than that of Ligia. We conducted Maximum Likelihood and Bayesian phylogenetic analyses on mitochondrial and nuclear DNA sequences. These analyses revealed multiple highly divergent lineages with discrete regional distributions, despite the recognition of a single valid species for this region. A traditional species-diagnostic morphological trait distinguished several of these lineages. The phylogeographic patterns of Tylos inside the Gulf of California show a deep and complex history. In contrast, patterns along the Pacific region between southern California and the Baja Peninsula indicate a recent range expansion, probably postglacial and related to changes in sea surface temperature (SST). In general, the phylogeographic patterns of Tylos differed from those of Ligia. Differences in the extension and connectivity of the habitats occupied by Tylos and Ligia may account for the different degrees of population isolation experienced by these two isopods and their contrasting phylogeographic patterns. Identification of divergent lineages of Tylos in the study area is important for conservation, as some populations are threatened by human activities. PMID:23844103

Hurtado, Luis A; Lee, Eun Jung; Mateos, Mariana

2013-01-01

317

Contrasting Phylogeography of Sandy vs. Rocky Supralittoral Isopods in the Megadiverse and Geologically Dynamic Gulf of California and Adjacent Areas  

PubMed Central

Phylogeographic studies of animals with low vagility and restricted to patchy habitats of the supralittoral zone, can uncover unknown diversity and shed light on processes that shaped evolution along a continent’s edge. The Pacific coast between southern California and central Mexico, including the megadiverse Gulf of California, offers a remarkable setting to study biological diversification in the supralittoral. A complex geological history coupled with cyclical fluctuations in temperature and sea level provided ample opportunities for diversification of supralittoral organisms. Indeed, a previous phylogeographic study of Ligia, a supralittoral isopod that has limited dispersal abilities and is restricted to rocky patches, revealed high levels of morphologically cryptic diversity. Herein, we examined phylogeographic patterns of Tylos, another supralittoral isopod with limited dispersal potential, but whose habitat (i.e., sandy shores) appears to be more extensive and connected than that of Ligia. We conducted Maximum Likelihood and Bayesian phylogenetic analyses on mitochondrial and nuclear DNA sequences. These analyses revealed multiple highly divergent lineages with discrete regional distributions, despite the recognition of a single valid species for this region. A traditional species-diagnostic morphological trait distinguished several of these lineages. The phylogeographic patterns of Tylos inside the Gulf of California show a deep and complex history. In contrast, patterns along the Pacific region between southern California and the Baja Peninsula indicate a recent range expansion, probably postglacial and related to changes in sea surface temperature (SST). In general, the phylogeographic patterns of Tylos differed from those of Ligia. Differences in the extension and connectivity of the habitats occupied by Tylos and Ligia may account for the different degrees of population isolation experienced by these two isopods and their contrasting phylogeographic patterns. Identification of divergent lineages of Tylos in the study area is important for conservation, as some populations are threatened by human activities. PMID:23844103

Hurtado, Luis A.; Lee, Eun Jung; Mateos, Mariana

2013-01-01

318

Alongshore variability in beach planform, grain-size distribution and foredune height of an embayed beach: Shoalwater Bay, Queensland, Australia  

NASA Astrophysics Data System (ADS)

Headland-bay beaches (HBB) are common beach-types found throughout the coastlines of the world. Morphodynamics of these structurally-controlled beaches are primarily governed by geological inheritance, wave climate, tidal range and grain-size distribution, which ultimately influence sediment transport across the beach-dune system. For embayed beaches, the degree of curvature (i.e., indentation ratio) has significant implications for littoral cell circulation, which mediates both cross-shore and alongshore sediment transport. This study investigated the morphodynamic controls on longshore and cross-shore sediment transport for a macro-tidal, embayed beach in central Queensland, Australia. Freshwater Beach is a 10 km long embayed beach located in the Shoalwater Bay Training Area, ~50 km north of Yeppoon. Freshwater Beach exhibits an asymmetrical planform which is characterized by a curved "shadow zone" (adjacent to the headland), transitioning to a straight tangential segment extending to the north. The beach is subjected to a mean tidal range of 6 m and prevailing onshore-directed winds and swell from the southeast. A total of 12 topographic profiles at ~1 km spacing were taken along the entire length of the beach to characterize variation in beach slope and foredune height. Sediment samples were collected across each transect for detailed grain-size and geochemical (XRD/XRF and SEM) analysis. Additionally, ground-based LiDAR surveys were conducted along the topographic profiles and for comparison with aerial-based LiDAR surveys. Preliminary results from topographic profiles show that the largest foredunes are located in the central portion of the beach, contrary to most embayed beaches where the largest dunes are typically located downdrift of the headland. Along the exposed section, the foredunes become large (~15 m high) and are hypothesized to be supplied by onshore welded bars that act as a sediment source for the foredunes to grow. Presently the alongshore and cross-shore sediment exchange is unknown and the dynamics of surface drainage and freshwater seeps in close proximity to the outlet of Freshwater Swamp remain a priority for understanding the morphologic evolution of the beach-dune system. Ongoing research is currently in progress to address relationships between grain-size grading alongshore and foredune height to determine a sediment budget from the nearshore extending through the parabolic dunefield.

Weymer, B. A.; Houser, C.; Giardino, R.

2012-12-01

319

Evaluation of potential sources and transport mechanisms of fecal indicator bacteria to beach water, Murphy Park Beach, Door County, Wisconsin  

USGS Publications Warehouse

Fecal Indicator Bacteria (FIB) concentrations in beach water have been used for many years as a criterion for closing beaches due to potential health concerns. Yet, current understanding of sources and transport mechanisms that drive FIB occurrence remains insufficient for accurate prediction of closures at many beaches. Murphy Park Beach, a relatively pristine beach on Green Bay in Door County, Wis., was selected for a study to evaluate FIB sources and transport mechanisms. Although the relatively pristine nature of the beach yielded no detection of pathogenic bacterial genes and relatively low FIB concentrations during the study period compared with other Great Lakes Beaches, its selection limited the number of confounding FIB sources and associated transport mechanisms. The primary sources of FIB appear to be internal to the beach rather than external sources such as rivers, storm sewer outfalls, and industrial discharges. Three potential FIB sources were identified: sand, swash-zone groundwater, and Cladophora mats. Modest correlations between FIB concentrations in these potential source reservoirs and FIB concentrations at the beach from the same day illustrate the importance of understanding transport mechanisms between FIB sources and the water column. One likely mechanism for transport and dispersion of FIB from sand and Cladophora sources appears to be agitation of Cladophora mats and erosion of beach sand due to storm activity, as inferred from storm indicators including turbidity, wave height, current speed, wind speed, sky visibility, 24-hour precipitation, and suspended particulate concentration. FIB concentrations in beach water had a statistically significant relation (p-value ‹0.05) with the magnitude of these storm indicators. In addition, transport of FIB in swash-zone groundwater into beach water appears to be driven by groundwater recharge associated with multiday precipitation and corresponding increased swash-zone groundwater discharge at the beach, as indicated by an increase in the specific conductance of beach water. Understanding the dynamics of FIB sources (sand, swash-zone groundwater, and Cladophora) and transport mechanisms (dispersion and erosion from storm energy, and swash-zone groundwater discharge) is important for improving predictions of potential health risks from FIB in beach water.

Juckem, Paul F.; Corsi, Steven R.; McDermott, Colleen; Kleinheinz, Gregory; Fogarty, Lisa R.; Haack, Sheridan K.; Johnson, Heather E.

2013-01-01

320

Deepwater Horizon oil spill impacts on Alabama beaches  

Microsoft Academic Search

From mid June 2010 to early August 2010, the white sandy beaches along Alabama's Gulf coast were inundated with crude oil discharged from the Deepwater Horizon well. The long-term consequences of this environmental catastrophe are still unfolding. Although BP has attempted to clean up some of these beaches, there still exist many unanswered questions regarding the physical, chemical, and ecological

J. S. Hayworth; T. P. Clement; J. F. Valentine

2011-01-01

321

The Beach--A Natural Protection from the Sea.  

ERIC Educational Resources Information Center

The beach and sand dunes are the first line of defense protecting the land from the sea. The effectiveness of the beach is caused by its sloping surface which dissipates the energy of waves and by the flexibility of the slope which changes as the waves change. The process and rate of accretion and erosion are dependent on the size and frequency of…

Sensabaugh, William M.

1983-01-01

322

Virtual Beach v2.2 User Guide  

EPA Science Inventory

Virtual Beach version 2.2 (VB 2.2) is a decision support tool. It is designed to construct site-specific Multi-Linear Regression (MLR) models to predict pathogen indicator levels (or fecal indicator bacteria, FIB) at recreational beaches. MLR analysis has outperformed persisten...

323

RECREATIONAL BEACH WATER QUALITY MONITORING WITH QUANTITATIVE POLYMERASE CHAIN  

EPA Science Inventory

Recreational beaches are an important economic and aesthetic asset to communities, states and the nation as a whole. Considerable resources are expended each year in monitoring the water at these beaches for fecal indicator bacteria as a means of determining if it is safe for pu...

324

Dramatic Improvements in Beach Water Quality Following Gull Removal  

EPA Science Inventory

Gulls are often cited as important contributors of fecal contamination to surface waters, and some recreational beaches have used gull control measures to improve microbial water quality. In this study, gulls were chased from a Lake Michigan beach using specially trained dogs, a...

325

The Florida Beach Case and the Road to Judicial Takings  

Microsoft Academic Search

In Stop the Beach Renourishment v. Florida Department of Environmental Protection, the U.S. Supreme Court unanimously upheld a state beach restoration project against landowner claims of an unconstitutional taking of the property. This result was not nearly as surprising as the fact that the Court granted certiorari on a case that turned on an obscure aspect of Florida property law:

Michael C. Blumm; Elizabeth B. Dawson

2011-01-01

326

WATER QUALITY ASSESSMENT OF LAKE TEXOMA BEACHES, 1999-2001  

EPA Science Inventory

A biological and inorganic assessment of five beaches on Lake Texoma was conducted from September 1999 through July 2001. Water samples for each beach site were divided into two groups, a swimming season and non-swimming season. Water properties such as temperature, alkalinity,...

327

Composition and Distribution of Beach Debris in Orange County, California  

Microsoft Academic Search

Many studies have quantified debris collected on beaches around the world. Only a few of those studies have been conducted in the United States, and they are largely limited to semi-quantitative efforts performed as part of volunteer clean-up activities. This study quantifies the distribution and composition of beach debris by sampling 43 stratified random sites on the Orange County, California

Shelly L. Moore; Dominic Gregorio; Michael Carreon; Stephen B. Weisberg; Molly K. Leecaster

2001-01-01

328

270. OFFICERS' QUARTERS (FORMER SUMMER COTTAGES) AT DOG PATCH BEACH, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

270. OFFICERS' QUARTERS (FORMER SUMMER COTTAGES) AT DOG PATCH BEACH, C. 1939. VIEW NORTH DOWN GREENWICH ROAD TOWARD FORMER SUMMER COTTAGES, CONVERTED TO OFFICER'S QUARTERS, OVER-LOOKING DOG PATCH BEACH. - Quonset Point Naval Air Station, Roger Williams Way, North Kingstown, Washington County, RI

329

33 CFR 110.74b - Apollo Beach, Fla.  

Code of Federal Regulations, 2010 CFR

...Navigable Waters 1 2010-07-01 2010-07-01 false Apollo Beach, Fla. 110.74b Section 110.74b Navigation...ANCHORAGE REGULATIONS Special Anchorage Areas § 110.74b Apollo Beach, Fla. Beginning at a point approximately 300 feet south of...

2010-07-01

330

Howard Beach Youth: A Study of Racial and Ethnic Attitudes.  

ERIC Educational Resources Information Center

This assessment of the climate of racial and ethnic attitudes in Howard Beach (New York) was conducted at John Adams High School, the public school attended by the greatest number of high school children in the Howard Beach community. The survey of 1,217 students was administered in December, 1986, several weeks before the incident in which a…

Lichter, Linda S.; Lichter, S. Robert

331

View of the yacht club facing north. The beach is ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

View of the yacht club facing north. The beach is in the foreground, the pier to the right. The painted octagonal window is above the deck. Avila's Front Street is at the rear of the building. - San Luis Yacht Club, Avila Pier, South of Front Street, Avila Beach, San Luis Obispo County, CA

332

33 CFR 110.74b - Apollo Beach, Fla.  

Code of Federal Regulations, 2011 CFR

...Waters 1 2011-07-01 2011-07-01 false Apollo Beach, Fla. 110.74b Section 110.74b Navigation and Navigable...REGULATIONS Special Anchorage Areas § 110.74b Apollo Beach, Fla. Beginning at a point approximately 300 feet south of the...

2011-07-01

333

33 CFR 110.74b - Apollo Beach, Fla.  

Code of Federal Regulations, 2013 CFR

...Waters 1 2013-07-01 2013-07-01 false Apollo Beach, Fla. 110.74b Section 110.74b Navigation and Navigable...REGULATIONS Special Anchorage Areas § 110.74b Apollo Beach, Fla. Beginning at a point approximately 300 feet south of the...

2013-07-01

334

33 CFR 110.74b - Apollo Beach, Fla.  

Code of Federal Regulations, 2012 CFR

...Waters 1 2012-07-01 2012-07-01 false Apollo Beach, Fla. 110.74b Section 110.74b Navigation and Navigable...REGULATIONS Special Anchorage Areas § 110.74b Apollo Beach, Fla. Beginning at a point approximately 300 feet south of the...

2012-07-01

335

Falcon Beach School Closure Review. Research 87-01.  

ERIC Educational Resources Information Center

Falcon Beach School is a small school experiencing declining school enrollment and increasing operational costs. In February, 1987, Falcon Beach School was announced as a candidate for closure. The Planning and Research Branch of Manitoba Education conducted an economic and social analysis of the school operations. This research report provides…

Manitoba Dept. of Education, Winnipeg. Planning and Research Branch.

336

Grain size dependence on turbulence entrainment in coastal beach areas  

Microsoft Academic Search

Sediment samples and beach profile evolution data have been collected at several sites (in Vilanova and the Ebro delta, Spain, and near Marseille, France), analyzing the structure of the grain size distribution variability and its relationship with the beach morfology. Measurement of the samples are performed in a detailled laboratory experiment using oscillating grid turbulence to compare the behaviour of

P. Medina; M. A. Sanchez

2009-01-01

337

Rip spacing and persistence on an embayed beach  

Microsoft Academic Search

Four years of daily time exposure images from an embayed beach were examined to study the spacing, persistence, and location preferences of rips in a natural rip channel system. A total of 5271 rip channels was observed on 782 days. Occurrence statistics showed no evidence of the preferred location pattern associated with standing edge waves trapped in an embayed beach.

R. A. Holman; G. Symonds; E. B. Thornton; R. Ranasinghe

2006-01-01

338

Geographic setting influences Great Lakes beach microbiological water quality  

USGS Publications Warehouse

Understanding of factors that influence Escherichia coli (EC) and enterococci (ENT) concentrations, pathogen occurrence, and microbial sources at Great Lakes beaches comes largely from individual beach studies. Using 12 representative beaches, we tested enrichment cultures from 273 beach water and 22 tributary samples for EC, ENT, and genes indicating the bacterial pathogens Shiga-toxin producing E. coli (STEC), Shigella spp., Salmonella spp, Campylobacter jejuni/coli, and methicillin-resistant Staphylococcus aureus, and 108–145 samples for Bacteroides human, ruminant, and gull source-marker genes. EC/ENT temporal patterns, general Bacteroides concentration, and pathogen types and occurrence were regionally consistent (up to 40 km), but beach catchment variables (drains/creeks, impervious surface, urban land cover) influenced exceedances of EC/ENT standards and detections of Salmonella and STEC. Pathogen detections were more numerous when the EC/ENT Beach Action Value (but not when the Geometric Mean and Statistical Threshold Value) was exceeded. EC, ENT, and pathogens were not necessarily influenced by the same variables. Multiple Bacteroides sources, varying by date, occurred at every beach. Study of multiple beaches in different geographic settings provided new insights on the contrasting influences of regional and local variables, and a broader-scale perspective, on significance of EC/ENT exceedances, bacterial sources, and pathogen occurrence.

Haack, Sheridan K.; Fogarty, Lisa R.; Stelzer, Erin A.; Fuller, Lori M.; Brennan, Angela K.; Isaacs, Natasha M.; Johnson, Heather E.

2013-01-01

339

33 CFR 110.74b - Apollo Beach, Fla.  

...Navigable Waters 1 2014-07-01 2014-07-01 false Apollo Beach, Fla. 110.74b Section 110.74b Navigation...ANCHORAGE REGULATIONS Special Anchorage Areas § 110.74b Apollo Beach, Fla. Beginning at a point approximately 300 feet south of...

2014-07-01

340

Occurrence of isopod Nerocila phaiopleura infestation on Whitefin wolf-herring (Chirocentrus nudus) from Southeast coast of India.  

PubMed

The present study reported the first observation of isopod parasite, Nerocila phaiopleura infestation on Chirocentrus nudus an economically important fish from Cuddalore coast, Southeast coast of India. The maximum prevalence of 6.3 % and mean intensity of 3.2 were observed during pre-monsoon 2010 and monsoon 2010 respectively. The highest intensity 7 was observed in the single host during monsoon. The site of attachment leads to wound and offer the secondary infection. Two pathogenic bacteria Streptococcus aureus and E. coli were isolated from the wound. PMID:24808654

Raja, K; Vijayakumar, R; Karthikeyan, V; Saravanakumar, A; Sindhuja, K; Gopalakrishnan, A

2014-06-01

341

Deepwater Horizon oil spill impacts on Alabama beaches  

NASA Astrophysics Data System (ADS)

From mid June 2010 to early August 2010, the white sandy beaches along Alabama's Gulf coast were inundated with crude oil discharged from the Deepwater Horizon well. The long-term consequences of this environmental catastrophe are still unfolding. Although BP has attempted to clean up some of these beaches, there still exist many unanswered questions regarding the physical, chemical, and ecological state of the oil contaminated beach system. In this paper, we present our understanding of what is known and known to be unknown with regard to the current state of Alabama's beaches in the aftermath of the Deepwater Horizon disaster. Motivated by our observations of the evolving distribution of oil in Alabama's beaches and BP's clean-up activities, we offer our thoughts on the lessons learned from this oil spill disaster.

Hayworth, J. S.; Clement, T. P.; Valentine, J. F.

2011-12-01

342

Deepwater Horizon oil spill impacts on Alabama beaches  

NASA Astrophysics Data System (ADS)

From mid June 2010 to early August 2010, the white sandy beaches along Alabama's Gulf coast were inundated with crude oil discharged from the Deepwater Horizon well. The long-term consequences of this environmental catastrophe are still unfolding. Although BP has attempted to clean up some of these beaches, there still exist many unanswered questions regarding the physical, chemical, and ecological state of the oil contaminated beach system. In this paper, we present our understanding of what is known and known to be unknown with regard to the current state of Alabama's beaches in the aftermath of the Deepwater Horizon disaster. Motivated by our observations of the evolving distribution of oil in Alabama's beaches and BP's clean-up activities, we offer our thoughts on the lessons learned from this oil spill disaster.

Hayworth, J. S.; Clement, T. P.; Valentine, J. F.

2011-07-01

343

Ecological risk assessment: Seal Beach, California  

SciTech Connect

Ecological risk assessment offers a means of quantifying the probability and degree of hazard posed toward the well-being of ecological resources by a myriad of physical, chemical and biological agents generated from human activity. In this paper, the authors discuss the results of a screening-level ecological risk assessment conducted in a unique coastal setting-the Seal beach National Wildlife Refuge, which is located within the US Naval Weapons Station, Seal Beach, California. Evaluation of activities formerly conducted by the National Aeronautics and Space Administration indicated the presence of various organic and inorganic chemical contaminants in subsurface soil and groundwater resources located beneath the weapons station, as well as potential pathways for introduction of those contaminants to the ecological resources of the wildlife refuge. Completion of the screening-level assessment identified inorganic contaminants-antimony, arsenic, beryllium, and manganese-as the primary risk drivers, leading to a recommendation for definitive characterization of the extent of chemical degradation of the subsurface environs and concurrent performance of a full-scale ecological risk assessment. It is the author's understanding that both of the recommended studies were initiated and were nearing completion at the time of the submittal of this paper.

Vernon, K.J.; Kuo, J.

1999-07-01

344

THE VISUAL BEACH NUMERICAL MODEL: A DIAGNOSTIC AND PROGNOSTIC MODELING APPROACH TO ACHIEVING US BEACHES AESTHETIC AND PUBLIC HEALTH PROTECTION  

EPA Science Inventory

Under the BEACH Act of 2000, EPA has committed to a program to monitor beach water quality and develop strategies, including modeling, for timely notification of the public when bacterial contamination poses a risk to bathers. EPA's goal is to manage 100% of significant public be...

345

Geothermal energy at Long Beach Naval Shipyard and Naval Station and at Seal Beach Naval Weapons Station, California. Final report  

Microsoft Academic Search

The purpose of this project was to determine and evaluate sources of geothermal energy at two military bases in southern California, the Long Beach Naval Shipyard and Naval Station and the Seal Beach Naval Weapons Station. One part of the project focused on the natural geothermal characteristics beneath the naval bases. Another part focused on the geothermal energy produced by

C. T. Higgins; R. H. Chapman

1984-01-01

346

Beach dynamics and nest distribution of the leatherback turtle (Dermochelys coriacea) at Grande Riviere Beach, Trinidad & Tobago.  

PubMed

Grande Riviere Beach in Trinidad and Tobago is an important nesting site in the Caribbean for the Critically Endangered leatherback sea turtle, Dermochelys coriacea. Community members were concerned that beach erosion and seasonal river flooding were destroying many of the nests deposited annually and thought that a hatchery was a possible solution. Over the 2001 turtle nesting season, the Institute of Marine Affairs (IMA) assessed the spatial and temporal distribution of nests using the Global Positioning System recorded to reference points, and beach dynamics using permanent bench mark profile stations, to determine areas of high risk and more stable areas for nesting. A total of 1449 leatherback nests were positioned. It was evident that at the start of the season in March, the majority of leatherback nests were deposited at the eastern section of the beach. After May, there was a continuing westward shift in nest distribution as the season progressed until August and beach erosion in the eastern section became predominant. The backshore remained relatively stable along the entire beach throughout the nesting season, and erosion was predominant in the foreshore at the eastern section of the beach, from the middle to the end of the season. Similar trends in accretion and erosion were observed in 2000. River flooding did not occur during the study period or in the previous year. With both high risk and more stable regions for turtle nesting available at Grande Riviere Beach, there was no compelling evidence to justify the need for a hatchery. PMID:17465163

Lum, Lori Lee

2005-05-01

347

USING TODAY'S DATA TO CLOSE THE BEACH TODAY. QUANTITATIVE POLYMERASE CHAIN REACTION (QPCR) RAPID BEACH CLOSINGS TOOL  

EPA Science Inventory

Recreational beaches are an important economic and aesthetic asset to communities, states and the nation as a whole. Considerable resources are expended each year in the measurement of fecal indicator bacteria concentrations in the water at these beaches to determine whether thes...

348

USING TODAY'S DATA TO CLOSE THE BEACH TODAY. QUANTITATIVE POLYMERASE CHAIN REACTION (QPCR) RAPID BEACH CLOSING TOOL  

EPA Science Inventory

Recreational beaches are an important economic and aesthetic asset to communities, states and the nation as a whole. Considerable resources are expended each year in the measurement of fecal indicator bacteria concentrations in the water at these beaches to determine whether thes...

349

Host tissues as microhabitats for Wolbachia and quantitative insights into the bacterial community in terrestrial isopods.  

PubMed

Animal-bacterial symbioses are highly dynamic in terms of multipartite interactions, both between the host and its symbionts as well as between the different bacteria constituting the symbiotic community. These interactions will be reflected by the titres of the individual bacterial taxa, for example via host regulation of bacterial loads or competition for resources between symbionts. Moreover, different host tissues represent heterogeneous microhabitats for bacteria, meaning that host-associated bacteria might establish tissue-specific bacterial communities. Wolbachia are widespread endosymbiotic bacteria, infecting a large number of arthropods and filarial nematodes. However, relatively little is known regarding direct interactions between Wolbachia and other bacteria. This study represents the first quantitative investigation of tissue-specific Wolbachia-microbiota interactions in the terrestrial isopod Armadillidium vulgare. To this end, we obtained a more complete picture of the Wolbachia distribution patterns across all major host tissues, integrating all three feminizing Wolbachia strains (wVulM, wVulC, wVulP) identified to date in this host. Interestingly, the different Wolbachia strains exhibited strain-specific tissue distribution patterns, with wVulM reaching lower titres in most tissues. These patterns were consistent across different host genetic backgrounds and might reflect different co-evolutionary histories between the Wolbachia strains and A. vulgare. Moreover, Wolbachia-infected females carried higher total bacterial loads in several, but not all, tissues, irrespective of the Wolbachia strain. Taken together, this quantitative approach indicates that Wolbachia is part of a potentially more diverse bacterial community, as exemplified by the presence of highly abundant bacterial taxa in the midgut caeca of several A. vulgare populations. PMID:24750488

Dittmer, J; Beltran-Bech, S; Lesobre, J; Raimond, M; Johnson, M; Bouchon, D

2014-05-01

350

Microscopical and functional aspects of calcium-transport and deposition in terrestrial isopods.  

PubMed

Terrestrial isopods (Crustacea) are excellent model organisms to study epithelial calcium-transport and the regulation of biomineralization processes. They molt frequently and resorb cuticular CaCO(3) before the molt to prevent excessive loss of Ca(2+) ions when the old cuticle is shed. The resorbed mineral is stored in CaCO(3) deposits within the ecdysial gap of the first four anterior sternites. After the molt, the deposits are quickly resorbed to mineralise the posterior part of the new cuticle. The deposits contain numerous small spherules composed of an organic matrix and amorphous CaCO(3), which has a high solubility and, therefore, facilitates quick mobilization of Ca(2+) and HCO(3)(-) ions. During the formation and resorption of the deposits large amounts of Ca(2+), HCO(3)(-) and H(+) are transported across the anterior sternal epithelial cells. Within the last years, various light and electron microscopical techniques have been used to characterize the CaCO(3) deposits and the cellular mechanisms involved in biomineralization. The work on the CaCO(3) deposits includes studies on the ultrastructure of the deposits, the sequence of events during deposit formation and dissolution, and the mineral composition of the sternal deposits. The differentiation of the anterior sternal epithelial cells and the mechanisms of epithelial ion transport required for the mineralization and demineralisation of the deposits was studied using various analytical light and electron microscopical techniques including polarized light microscopy, immunocytochemistry, electron microprobe analysis, electron energy loss spectroscopy and electron spectroscopic imaging. Comparative analysis of deposit morphology and the differentiation of the sternal epithelia provide information on the evolution of CaCO(3) deposit formation in relation to the degree of adaptation to terrestrial environments. PMID:15629645

Ziegler, Andreas; Fabritius, Helge; Hagedorn, Monica

2005-01-01

351

Natatory-stage cymothoid isopods: description, molecular identification and evolution of attachment.  

PubMed

Cymothoid isopods are parasites that have a biphasic life cycle comprised of free-swimming micropredatory stages that eventually attach permanently to fishes, on which they change sex and morphology. Thus, matching free-swimming and permanently attached life-history stages is difficult. We attempted to identify natatory-stage cymothoids by seeking matches of partial 16S rRNA gene sequences from these stages and described adult cymothoids. Natatory cymothoids were collected from light traps at Lizard Island, Great Barrier Reef and adult females were collected from fishes from several sites along the east coast of Australia. A 488bp alignment of 16S mtDNA was compared for nine species of adult cymothoids and 10 natatory-stage morphotypes. Sequences from five natatory morphotypes were similar or identical to described specimens. Sequences identical to those of Anilocra nemipteri and Cymothoa indica were collected and these are considered definitive identifications. Sequences of three other morphotypes were highly similar (97.1-99.8% homologous) to described species; the differences may reflect a low level of sequencing error, intra-specific variation or the presence of complexes of species. Figures and descriptions are provided for identified and unidentified natatory cymothoids. The sequences were also used to explore the phylogenetic relationships of these taxa using minimum evolution, maximum parsimony, maximum likelihood and Bayesian inference analyses. Topologies from each of the four phylogenetic analyses did not differ significantly. Bayesian inference and maximum likelihood methods produced identical topologies with the highest resolution. These analyses showed that some morphological characters (pereopods and uropods) of natatory stages were distributed consistently on these molecular phylogenies, raising the possibility of identifying some natatory stages to genus. Our results suggest that ancestral cymothoids attached in the buccal or gill cavity and that external attachment, as seen in Anilocra and Renocila is a derived condition that has arisen more than once. PMID:17880981

Jones, Conor M; Miller, Terrence L; Grutter, Alexandra S; Cribb, Thomas H

2008-03-01

352

Immunocytochemical Localization of Na+,K+ATPase in the Calcium-transporting Sternal Epithelium of the Terrestrial Isopod Porcellio scaber L. (Crustacea)  

Microsoft Academic Search

Terrestrial isopods store large amounts of calcium carbonate between the epithelium and the old cuticle of the first four anterior sternites before molt. During the formation of these sternal CaCO3 deposits, large amounts of calcium are transported across the anterior sternal epithelium from the base to the apical side of the integument, and in the reverse direction during resorption of

Andreas Ziegler

1997-01-01

353

The link between antioxidant enzymes catalase and glutathione S-transferase and physiological condition of a control population of terrestrial isopod (Porcellio scaber).  

PubMed

The aim of this work was to investigate if the activities of catalase and glutathione S-transferase in a control population of terrestrial isopods (Porcellio scaber) are correlated with the physiological condition of the isopods. For this purpose, the activities of these enzymes were analysed in isopods from a stock population and in parallel, the physiological condition of the same specimens was assessed using a histological approach based on epithelial thickness and lipid droplets. We found a correlation between antioxidant enzymes and the physiological condition of the isopods. This implies that these enzymes could be used as predictive indicators of the physiological condition in a stock population before comprehensive toxicological studies are conducted and also in control group after the experiment. When a control group is found to be very heterogeneous in terms of physiological condition, the experiment should be repeated with a larger number of experimental animals. The findings of this study will contribute to more accurate experimental design of toxicity tests when using biomarkers. This should encourage other researchers to increase their effort to know the physiological state of their test organisms. PMID:22177480

Jemec, Anita; Lešer, Vladka; Drobne, Damjana

2012-05-01

354

Feeding behaviour of the terrestrial isopod Porcellionides pruinosus Brandt, 1833 (Crustacea, Isopoda) in response to changes in food quality and contamination  

Microsoft Academic Search

Soil decomposition is mainly dependent on the nature and characteristics of organic matter within the soil, the environmental conditions and the activity of microorganisms and soil fauna. Isopods play an important role in decomposition through litter fragmentation and stimulating and\\/or ingesting fungi and bacteria.The aim of this study was to jointly evaluate the effect of different food types and the

Susana Loureiro; Alexandra Sampaio; Ana Brandão; António J. A. Nogueira; Amadeu M. V. M. Soares

2006-01-01

355

Genetic variation for plasticity in physiological and life-history traits among populations of an invasive species, the terrestrial isopod Porcellio laevis  

Microsoft Academic Search

Background: Evolutionary interpretations of life-history as well as physiological patterns require distinction between genotypic variations and environmentally induced phenotypic variation. Problem: We investigate the extent to which variation in life history and metabolism have an environmental or a genetic basis in an invasive species. Methods: We used the widely distributed isopod, Porcellio laevis, as a model. To examine the effects

Marco A. Lardies; Francisco Bozinovic

2008-01-01

356

Joint effects of three plant protection products to the terrestrial isopod Porcellionides pruinosus and the collembolan Folsomia candida.  

PubMed

The effects of simultaneous application of plant protection products are of concern since the uses of different products pose an additional risk to non-target soil organisms. The effects of binary combinations of dimethoate, glyphosate and spirodiclofen, an insecticide an herbicide and an acaricide, on the avoidance behaviour of the terrestrial isopod Porcellionides pruinosus and the reproductive effort of Folsomia candida were assessed using the two reference models of concentration addition (CA) and independent action (IA). Results of single exposure to the three pesticides indicated a clear dose related avoidance response of the isopods in the highest concentrations tested of the three as well as a strong decrease in collembolan adult survival and concomitant number of juveniles produced. In the combined experiments, antagonism was found in 7 out of the 12 combinations, four combinations followed the reference models, and only in one combination synergism was detected (lower doses of glyphosate and spirodiclofen applied to P. pruinosus). In conclusion, it seems that mixing and applying these products, at the recommended field application rate, does not lead to enhanced toxicity, hence limited risk is associated with the joint application of these pesticides. PMID:20579688

Santos, Miguel J G; Soares, Amadeu M V M; Loureiro, Susana

2010-08-01

357

"Candidatus Hepatoplasma crinochetorum," a New, Stalk-Forming Lineage of Mollicutes Colonizing the Midgut Glands of a Terrestrial Isopod  

PubMed Central

Uncultivated bacteria that densely colonize the midgut glands (hepatopancreas) of the terrestrial isopod Porcellio scaber (Crustacea: Isopoda) were identified by cloning and sequencing of their 16S rRNA genes. Phylogenetic analysis revealed that these symbionts represent a novel lineage of the Mollicutes and are only distantly related (<82% sequence identity) to members of the Mycoplasmatales and Entomoplasmatales. Fluorescence in situ hybridization with a specific oligonucleotide probe confirmed that the amplified 16S rRNA gene sequences indeed originated from a homogeneous population of symbionts intimately associated with the epithelial surface of the hepatopancreas. The same probe also detected morphotypically identical symbionts in other crinochete isopods. Scanning and transmission electron microscopy revealed uniform spherical bacterial cells without a cell wall, sometimes interacting with the microvilli of the brush border by means of stalk-like cytoplasmic appendages, which also appeared to be involved in cell division through budding. Based on the isolated phylogenetic position and unique cytological properties, the provisional name “Candidatus Hepatoplasma crinochetorum” is proposed for this new taxon of Mollicutes colonizing the hepatopancreas of P. scaber. PMID:15466563

Wang, Yongjie; Stingl, Ulrich; Anton-Erxleben, Friederike; Geisler, Sabine; Brune, Andreas; Zimmer, Martin

2004-01-01

358

Reckless males, rational females: dynamic trade-off between food and shelter in the marine isopod Idotea balthica.  

PubMed

Habitat choice of herbivores is expected to be a resolution of a trade-off between food and shelter. The resolution of this trade-off may, however, be dynamic within a species because distinct phenotypes may value these factors differently and the value may vary temporally. We studied this hypothesis in the marine herbivore Idotea balthica (Isopoda), by simultaneously manipulating both food and shelter, and investigated whether the resolution of the trade-off differed between sexes, colour morphs and day and night (i.e. high and low predation risk). Isopods chose between exposing and concealing backgrounds in which the quantity or quality of food varied. When choosing between the backgrounds in the absence of food, females preferred the concealment more than males did. However, in a trade-off situation the isopods traded shelter for food, and females more so than males. Thus, males' lower preference for the shelter was not counterbalanced by a stronger preference for food. The microhabitat use also differed between night and day showing adaptation to diurnally fluctuating predation risk. We suggest that microhabitat utilization of females is more strongly tied to variation in risk and resources than that of males, for whom other factors, such as seeking mates, may be more important. PMID:18692551

Vesakoski, Outi; Merilaita, Sami; Jormalainen, Veijo

2008-11-01

359

Environmental contaminants in the food chain, NWS Seal Beach and Seal Beach NWR  

SciTech Connect

The authors conducted a study to determine whether environmental contaminants occurred in fish and invertebrates at concentrations that could be harmful to birds feeding in the estuarine salt marsh at Seal Beach National Wildlife Refuge (NWR), which is part of Naval Weapons Station (NWS) Seal Beach. Management of the refuge is focused primarily on endangered species, especially the light-footed clapper rail and the California least tern. Important food-chain organisms taken by rails (e.g., crabs and snails) and least terns (small fish) were sampled and analyzed for inorganic and organic contaminants that might be related to Navy activities at the Station. Results indicated that those contaminants are not likely to have lethal effects on rails or terns, although some chemicals (including cadmium, chromium, copper, lead, zinc and DDE) occurred at elevated concentrations in portions of the marsh. Possible sublethal effects also were evaluated and will be discussed.

Ohlendorf, H.M.; Byron, E.R. [CH2M Hill, Sacramento, CA (United States); Freas, K.E. [CH2M Hill, San Jose, CA (United States); Casados, E.M.; Kidwell, J.J. [Naval Facilities Engineering Command, San Diego, CA (United States). SW Division

1994-12-31

360

Tsunami Deposits and Hazard Analysis On Khalaktirskiy Beach Near Petropavlovsk, Pacific Coast of Kamchatka, Russia  

Microsoft Academic Search

Khalaktirskiy beach is a long, open Pacific beach just north of the narrow entrance to Avacha Bay, and is the ocean beach nearest the city of Petropavlovsk- Kamchatskiy [The city is well protected from tsunamis and has the most complete tide gage record of tsunamis affecting Kamchatka.] Khalaktirskiy is one of most populated beach areas on Kamchatka, including low-lying towns

Tatiana K. Pinegina; Joanne Bourgeois

2002-01-01

361

Impact of Offshore Nuclear Power PlantsForecasting Visits to Nearby Beaches  

Microsoft Academic Search

A multiple method investigation was undertaken to project the impact of offshore nuclear power plants on beach visitation at adjacent beaches. (1) Related literature was reviewed concerning human adjustment to natural hazards, risk-taking behavior, and public attitudes toward nuclear power. (2) People were interviewed at beaches in three states with respect to: (a) intended avoidance of beaches near a hypothetical

Earl J. Baker; Stephen G. West; Dennis J. Moss; James M. Weyant

1980-01-01

362

TESTING A BEACH BACTERIA MODEL IN LAKE MICHIGAN AND SOUTHERN CALIFORNIA  

EPA Science Inventory

Beach closures due to high bacterial concentrations deprive the public and disrupt the tourist industry. Almost half the Lake Michigan beaches are closed more than 10% of the time. In 1999 the six-mile long beach in Huntington Beach, California was closed in July and August. Due ...

363

75 FR 59966 - Safety Zone; New York Air Show at Jones Beach State Park, Wantagh, NY  

Federal Register 2010, 2011, 2012, 2013

...performing aerobatic maneuvers over the Atlantic Ocean off of Jones Beach State Park...Show at Jones Beach State Park, Atlantic Ocean off of Jones Beach, Wantagh...aircraft over a specified area of the Atlantic Ocean off of Jones Beach State...

2010-09-29

364

Revisiting Hele-Shaw Dynamics to Better Understand Beach O. Bokhove1,2  

E-print Network

Revisiting Hele-Shaw Dynamics to Better Understand Beach Evolution O. Bokhove1,2 , A.J. van der during storms, drives the evo- lution of beaches. Beach evolution by non-linear break- ing waves to the classic "Hele-Shaw" lab- oratory experiment can be designed that creates beach mor- phologies

Al Hanbali, Ahmad

365

How Palm Beach County's economy has suffered after real-estate bust  

E-print Network

How Palm Beach County's economy has suffered after real-estate bust By JEFF OSTROWSKI Palm Beach, 2011 The collapse of the housing market has exacted a multibillion-dollar toll on Palm Beach County verges on extinction, it's no exaggeration to conclude that middle-income residents of Palm Beach County

Belogay, Eugene A.

366

!""#$%%&'()*+,-.)-)/+,(012*3#*(440&2.%5667%68%69%:()&!;!2##(*;:2,),/)%Beach Hopper Bonanza  

E-print Network

!""#$%%&'()*+,-.)-)/+,(012*3#*(440&2.%5667%68%69%:()&!;!2##(*;:2,),/)%Beach Hopper Bonanza Field Introduction/Overview This second grade unit focuses on beach hoppers, tiny amphipods found on most sandy beaches. The first three lessons focus on learning beach hopper characteristics in the classroom

367

A MODEL OF BEACH PROFILE EVOLUTION INCLUDING WAVE-UNDERTOW INTERACTION  

E-print Network

1 A MODEL OF BEACH PROFILE EVOLUTION INCLUDING WAVE-UNDERTOW INTERACTION Chi Zhang1 , Jinhai Zheng2 , Titi Sui3 , Zeki Demirbilek4 and Lihwa Lin5 A numerical model of beach profile evolution is developed in beach profile evolution. Keywords: beach profile evolution; sandbar; wave; undertow; numerical model

US Army Corps of Engineers

368

At $60.6 million, FPL is Palm Beach County's biggest property taxpayer  

E-print Network

At $60.6 million, FPL is Palm Beach County's biggest property taxpayer By BILL DIPAOLO Palm Beach Quick quiz: Who'll be Palm Beach County's biggest property taxpayer this year? Donald Trump? Wrong. Jack to figures released by the Palm Beach County Tax Collector's office today. That's about 1.6 percent of the $3

Belogay, Eugene A.

369

Nearshore hydrodynamics as loading and forcing factors for Escherichia coli contamination at an embayed beach  

E-print Network

at an embayed beach Zhongfu Ge,a,* Richard L. Whitman,a Meredith B. Nevers,a Mantha S. Phanikumar coli were conducted at Chicago's 63rd Street Beach, an embayed beach that had the highest mean E. coli concentration among 23 similar Lake Michigan beaches during summer months of 2000­2005, in order to find

370

The influence of metal speciation on the bioavailability and sub-cellular distribution of cadmium to the terrestrial isopod, Porcellio dilatatus.  

PubMed

Cadmium is a non-essential toxic metal that is able to bioaccumulate in both flora fauna and has the potential to biomagnify in some food chains. However, the form in which cadmium is presented to consumers can alter the bioavailability and possibly the internal distribution of assimilated Cd. Previous studies in our laboratory highlighted differences in Cd assimilation among isopods when they were provided with a plant-based food with either Cd biologically incorporated into plant tissue or superficially amended with ionic Cd(2+). Cd is known for its high affinity for sulphur ligands in cysteine residues which form the basis for metal-binding proteins such as metallothionein. This study compares Cd assimilation efficiency (AE) in Porcellio dilatatus fed with food amended with either cadmium cysteinate or cadmium nitrate in an examination of the influence of Cd speciation on metal bioavailability followed by an examination of the sub-cellular distribution using a centrifugal fractionation protocol. As hypothesized the AE of Cd among isopods fed with Cd(NO(3))(2) (64%, SE=5%) was higher than AE for isopods fed with Cd(Cys)(2) (20%, SE=3%). The sub-cellular distribution also depended on the Cd species provided. Those isopods fed Cd(Cys)(2) allocated significantly more Cd to the cell debris and organelles fractions at the expense of allocation to metal-rich granules (MRG). The significance of the difference in sub-cellular distribution with regard to toxicity is discussed. This paper demonstrates that the assimilation and internal detoxification of Cd is dependent on the chemical form of Cd presented to the isopod. PMID:21215989

Calhôa, Carla Filipa; Monteiro, Marta S; Soares, Amadeu M V M; Mann, Reinier M

2011-04-01

371

Mixed sediment beach processes: Kachemak Bay, AK  

NASA Astrophysics Data System (ADS)

Numerous studies have documented the rates of sediment transport along well-sorted, sand-rich beaches relating sediment transport to forcing by waves and currents. The dynamics of mixed-grain size beaches, however, have received relatively little attention in the scientific literature in spite of the estimate that these systems represent approximately 80 percent of the world's non-rocky coastlines. The tectonically active, megatidal, sea dominated beaches of Kachemak Bay, AK exhibit a wide range of interesting characteristics. In particular, the surficial sediments have a bimodal size distribution, in which self- organized bedforms composed of fine-to-medium sand migrate as coherent packages over a cobble substrate which is also dynamic. Our goal is to characterize and quantify, over various time scales, the coupled sediment transport dynamics and morphological development of this prototypical mixed sediment system. In February 2003 we installed an Argus Beach Monitoring System at the study site consisting of 8 cameras spanning a field of view of approximately 220 degrees. Utilizing a tidal contouring algorithm and over three years of hourly images, we are quantifying the rates, direction, and form of sediment transport taken by both the sand size and cobble fractions of the bi-modal distribution. Annual topographic surveys provide ground- truthing for the image derived data. Hydrodynamic forcing data are being collected with a wave/tide gage deployed in approximately 3m (MLLW) of water about 1.5 km (in the cross-shore) from the ARGUS station. In addition, we are applying new digital imaging technologies to map the spatial distribution of surficial grain size (both modes) along the field of view of the Argus cameras. Alongshore migration rates of intertidal sand bedforms, 1-2 m amplitude and ~200m wave length, over the cobble substrate have been documented to be approximately 250 m/yr. Strong seasonality in migration rates is evident with the majority of sand body movement, up to weekly-averaged rates of movement exceeding 6 m/day, occurring during large wave events. The cobble substrate, over which the organized sand fraction is transported, is dynamic as well. Both video measurements and ground surveys have documented the cross- shore and longshore migration of a large cobble bedform over its life cycle of more than a year. The cobble bedform was formed during a recent winter and by the following spring the bedform had organized into a mobile cobble berm with a landward slipface approximately 1.5 m high and a cross-shore length of about 50 m. During the following year, this feature increased in volume and migrated 50 m in the cross-shore direction and over 100 m in the alongshore. While the organized sand bedform migration rates are well correlated with the larger winter storm season, initial observations indicate that the cobble berm is significantly active during the relatively mild spring and summer months. The long time series of images allows us to not only quantify the transport rates and form of the two distinct sediment size modes but also to examine feedback processes within the overall coupled system.

Ruggiero, P.; Adams, P. N.; Warrick, J. A.

2006-12-01

372

Kennedy Space Center ocean beach erosion  

NASA Technical Reports Server (NTRS)

Dune barrier erosion and possible breakthrough due to storm and hurricane wave activity is studied near Mosquito Lagoon, in Kennedy Space Center property. The results of a geological as well as hydrodynamic appraisal of the problem area indicate that no inlet has existed across the dune barrier since 500 A.D., and that there is little likelihood of a possible breakthrough inlet remaining open permanently, primarily because the relatively shallow lagoon does not contain enough volume of water to maintain an inlet between the ocean and the lagoon. It is therefore recommended that only minimal measures, such as closing up the man-made passes across the dunes, be carried out to ensure continuation of the action of natural beach maintaining processes.

Mehta, A. J.; Obrien, M. P.

1973-01-01

373

Shoulder arthroscopy positioning: lateral decubitus versus beach chair.  

PubMed

Since the introduction of the beach chair position for shoulder arthroscopy, orthopaedic surgeons have debated whether the beach chair or lateral decubitus is superior. Most surgeons use the same patient position to perform all of their arthroscopic shoulder procedures, regardless of the pathology. Each position has its advantages and disadvantages. The evidence regarding the efficiency, efficacy, and risks of the lateral decubitus and the beach chair positions for shoulder arthroscopy does not show one position to be superior. This review presents a comparison of these positions with regard to setup, surgical visualization, access, and patient risk. PMID:19664509

Peruto, Christina M; Ciccotti, Michael G; Cohen, Steven B

2009-08-01

374

The cryptogenic parasitic isopod Orthione griffenis Markham, 2004 from the eastern and western Pacific.  

PubMed

The parasitic isopod Orthione griffenis Markham, 2004 was originally described from thalassinid mud shrimp hosts collected in Oregon. Subsequently, O. griffenis has been cited as a non-indigenous species in estuaries of the Pacific Northwest of North America; however, no taxonomic work has provided evidence that specimens from the western coast of the United States and other localities are conspecific. We report the first record of O. griffenis from Chinese waters based on collections made in the 1950s, which pre-date any records of the species from the United States by at least 20 years. Females of the Chinese specimens match the original description except in the number of articles on antennae 2 (six and five articles in the Chinese material and holotype, respectively). However, newly examined material from the United States showed females are variable in this character, exhibiting 5-6 articles on antennae 2. Although males of O. griffenis from Oregon were originally described as having second antennae with five articles, reexamination of the allotype showed that antennae 2 were damaged and missing terminal articles. Thus, the number of articles in the second antennae of males is six, as found in both the Chinese and new samples from the United States. Scanning electron microscopy (SEM) of males from USA and China revealed curled setae on the distolateral margins of the uropods, which were not reported in the original description. In China the species is found on Austinogebia wuhsienweni (Yu) from Shandong province, whereas along the western coast of North America the species extends from British Columbia to California on Upogebia pugettensis (Dana) and U. macginitieorum Williams (the latter species replacing U. pugettensis south of Pt. Conception, California). Orthione griffenis has also been reported from Japan on Upogebia issaeffi (Balss) and Austinogebia narutensis (Sakai). In Coos Bay, Oregon, the prevalence of the species was ?65% in the mature U. pugettensis. The species was presumably introduced as larvae released in ballast water from ships originating in Asia. The epicaridium larvae of O. griffenis were examined with SEM, and aspects of the life history of the species are reviewed. PMID:21669852

Williams, Jason D; An, Jianmei

2009-08-01

375

Morphology of the compound eye of the giant deep-sea isopod Bathynomus giganteus.  

PubMed

The structural organization of the compound eye of the largest known isopod, Bathynomus giganteus, is described from four specimens maintained in the laboratory for as long as two months. Living specimens have not previously been available for study. The two triangular compound eyes measure about 18 mm on the dorsal edge and are separated by an interocular distance of 25 mm. They face forward and slightly downward and may have significant overlap in visual fields. Each eye contains about 3,500 ommatidia in animals of body lengths from 22.5 cm to 37.5 cm. The packing of ommatidia is not uniform across the retina, but is nearly hexagonal in the dorsal central region and nearly square in the ventral and lateral periphery. The dioptric elements in each ommatidium consist of a laminar cornea, which is flat externally and convex internally, and a bipartite crystalline cone. Sometimes seven and sometimes eight retinular cells closely appose the proximal tip of the cone and bear the microvilli of the rhabdom. Proximal to the rhabdom the retinular cells form thin pillars near the periphery of the ommatidium, and the central portion along the optic axis at this level is occupied by interstitial cells that contain massive arrays of clear vesicles thought to serve as reflective elements. The arhabdomeral segments of the retinular cells and the interstitial cells rest on a basement membrane. Within each ommatidium the basement membrane has two extensions with cylindrical cores and thin sheets of dense material and collagen-like filaments. These sheets occupy spaces between adjacent interstitial cells up to the level of the rhabdomeral segments of the retinular cells. Arrays of pigment cells with relatively weak light-screening properties separate adjacent ommatidia. Animals were fixed both in light within a week of being brought from depth into daylight, and after 2 months of maintenance in constant darkness following such daylight exposure. In both cases, microvilli of the rhabdom were severely disrupted and the retinular cytoplasm contained numerous multivesicular bodies. Exposure to natural daylight appears to cause irreversible structural damage to the photoreceptors of these animals. PMID:3746916

Chamberlain, S C; Meyer-Rochow, V B; Dossert, W P

1986-08-01

376

18. SAND BEACH WITH SUNBATHERS AND UMBRELLAS. VIEW FROM SOUTHEAST. ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

18. SAND BEACH WITH SUNBATHERS AND UMBRELLAS. VIEW FROM SOUTHEAST. NORTHWEST ELEVATION OF REFRESHMENT STAND Photocopy of 1930-1940 photograph - Glen Echo Park, Crystal Swimming Pool, 7300 McArthur Boulevard, Glen Echo, Montgomery County, MD

377

11. BEACH TOILET BUILDING, OFFICE AND FIRST AID BUILDING, PLANS, ...  

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

11. BEACH TOILET BUILDING, OFFICE AND FIRST AID BUILDING, PLANS, ELEVATIONS AND SECTIONS Drawing No. 103-07 - Glen Echo Park, Crystal Swimming Pool, 7300 McArthur Boulevard, Glen Echo, Montgomery County, MD

378

BOB COLE CONSERVATORY OF MUSIC California State University, Long Beach  

E-print Network

to the music industry include John Patitucci (bass), Mark Turner (saxophone), Tom Kubis (saxophone1 BOB COLE CONSERVATORY OF MUSIC California State in the Jazz Studies program at the Bob Cole Conservatory of Music at California State University, Long Beach

Sorin, Eric J.

379

Beach Erosion Project, Delaware Coast Protection Project, Delaware.  

National Technical Information Service (NTIS)

The project provides for improvements along the Atlantic Coast of Delaware extending from Cape Henlopen to the Maryland State Line at Fenwick Island. Those improvements include combined beach erosion control and hurricane protection and consists of wideni...

1971-01-01

380

Nonlinear resonance of trapped waves on a plane beach  

E-print Network

Linear edge waves were first found mathematically by Stokes (1846). It has long been a topic of interest, since edge waves are believed to be responsible for the formation of beach cusps. Galvin (1965) was the first to ...

Li, Guangda, Ph. D. Massachusetts Institute of Technology

2007-01-01

381

Modes of embayed beach dynamics: analysis reveals emergent timescales  

NASA Astrophysics Data System (ADS)

Embayed beaches, or beaches positioned between rocky headlands, exhibit morphologic changes over many length and time scales. Beach sediment is transported as a result of the day-to-day wave forcing, causing patterns of erosion and accretion. We use the Rocky Coastline Evolution Model (RCEM) to investigate how patterns of shoreline change depend on wave climate (the distribution of wave-approach angles) and beach characteristics. Measuring changes in beach width through time allows us to track the evolution of the shape of the beach and the movement of sand within it. By using Principle Component Analysis (PCA), these changes can be categorized into modes, where the first few modes explain the majority of the variation in the time series. We analyze these modes and how they vary as a function of wave climate and headland/bay aspect ratio. In the purposefully simple RCEM, sediment transport is wave-driven and affected by wave shadowing behind the headlands. The rock elements in our model experiments (including the headlands) are fixed and unerodable so that this analysis can focus purely on sand dynamics between the headlands, without a sand contribution from the headlands or cliffs behind the beach. The wave climate is characterized by dictating the percentage of offshore waves arriving from the left and the percentage of waves arriving from high angles (very oblique to the coastline orientation). A high-angle dominated wave climate tends to amplify coastline perturbations, whereas a lower-angle wave climate is diffusive. By changing the headland/bay aspect ratio and wave climate, we can perform PCA analysis of generalized embayed beaches with differing anatomy and wave climate forcings. Previous work using PCA analysis of embayed beaches focused on specific locations and shorter timescales (<30 years; Short and Trembanis, 2004). By using the RCEM, we can more broadly characterize beach dynamics over longer timescales. The first two PCA modes, which explain a majority of the beach width time series variation (typically >70%), are a 'breathing' mode and a 'rotational' mode. The newly identified breathing mode captures the sand movement from the middle of the beach towards the edges (thickening the beach along the headlands), and the rotational mode describes the movement of sand towards one headland or another, both in response to stochastic fluctuations about the mean wave climate. The two main modes operate independently and on different timescales. In a weakly low-angle dominated wave climate, the breathing mode tends to be the first mode (capturing the most variance), but with greater low-angle dominance (greater morphological diffusivity), the rotational mode tends to be first. The aspect ratio of the bay also affects the order of the modes, because wave shadowing affects sediment transport behind the headlands. Previous work has attributed beach rotation to changes in various climate indices such as the North Atlantic Oscillation (Thomas et al., 2011); however, PCA analysis of the RCEM results suggests that embayed beaches can have characteristic timescales of sand movement that result from internal system dynamics, emerging even within a statistically constant wave climate. These results suggest that morphologic changes in embayed beaches can occur independently of readily identifiable shifts in forcing.

Murray, K. T.; Murray, A.; Limber, P. W.; Ells, K. D.

2013-12-01

382

Heart rate and motion analysis by GPS in beach soccer  

Microsoft Academic Search

Although beach soccer has become increasingly popular in recent years very little scientific research has been conducted into the sport. A pilot study was carried out with the aim of examining the physiological (heart rate) and physical (motion analysis) responses of beach soccer players during competitive matches. Ten players (age 25.5 ±0.5 years; height 1.80 ± 0.08 m; weight 78.2

Julen Castellano; David Casamichana

2010-01-01

383

Evaluation of airborne topographic lidar for quantifying beach changes  

USGS Publications Warehouse

A scanning airborne topographic lidar was evaluated for its ability to quantify beach topography and changes during the Sandy Duck experiment in 1997 along the North Carolina coast. Elevation estimates, acquired with NASA's Airborne Topographic Mapper (ATM), were compared to elevations measured with three types of ground-based measurements - 1) differential GPS equipped all-terrain vehicle (ATV) that surveyed a 3-km reach of beach from the shoreline to the dune, 2) GPS antenna mounted on a stadia rod used to intensely survey a different 100 m reach of beach, and 3) a second GPS-equipped ATV that surveyed a 70-km-long transect along the coast. Over 40,000 individual intercomparisons between ATM and ground surveys were calculated. RMS vertical differences associated with the ATM when compared to ground measurements ranged from 13 to 19 cm. Considering all of the intercomparisons together, RMS ??? 15 cm. This RMS error represents a total error for individual elevation estimates including uncertainties associated with random and mean errors. The latter was the largest source of error and was attributed to drift in differential GPS. The ??? 15 cm vertical accuracy of the ATM is adequate to resolve beach-change signals typical of the impact of storms. For example, ATM surveys of Assateague Island (spanning the border of MD and VA) prior to and immediately following a severe northeaster showed vertical beach changes in places greater than 2 m, much greater than expected errors associated with the ATM. A major asset of airborne lidar is the high spatial data density. Measurements of elevation are acquired every few m2 over regional scales of hundreds of kilometers. Hence, many scales of beach morphology and change can be resolved, from beach cusps tens of meters in wavelength to entire coastal cells comprising tens to hundreds of kilometers of coast. Topographic lidars similar to the ATM are becoming increasingly available from commercial vendors and should, in the future, be widely used in beach surveying.

Sallenger, A.H., Jr.; Krabill, W.B.; Swift, R.N.; Brock, J.; List, J.; Hansen, M.; Holman, R.A.; Manizade, S.; Sontag, J.; Meredith, A.; Morgan, K.; Yunkel, J.K.; Frederick, E.B.; Stockdon, H.

2003-01-01

384

Online Beach Profile Management and Analysis System (PMAS)  

Microsoft Academic Search

HARRIS, M.S., TINKER, T.P., and WRIGHT, E.E. 2007. Online Beach Profile Management and Analysis System (PMAS). Journal of Coastal Research, SI 50 (Proceedings of the 9th International Coastal Symposium), 62 - 66. Gold Coast, Australia, ISSN 0749.0208 Long-term beach profile datasets provide coastal communities with information critical to understanding temporal and spatial variability in coastal systems. Given the economic growth

M. S. Harris; T. P. Tinker; E. E. Wright

385

Physical modeling of three-dimensional intermediate beach morphodynamics  

NASA Astrophysics Data System (ADS)

Experiments have been performed in a large wave tank in order to study the morphodynamics of rip current systems. Both accretive and erosive shore-normal wave conditions were applied, the beach evolving through all the states within the intermediate beach classification, under the so-called down-state (accretive) and up-state (erosive) morphological transitions. Results show that any prescribed change in the wave conditions drastically increases the rate at which the morphology changes. The surf zone morphology tends toward a steady state when running a given wave climate for a long duration. We quantitatively describe a full down-state sequence characterized by the progressive evolution of an alongshore-uniform bar successively into a crescentic plan shape, a bar and rip channel morphology, and a terrace. From the analysis of a large data set of dense Eulerian measurements and bathymetric surveys, we depict several feedback mechanisms associated with wave-driven rip current circulation, wave nonlinearities and the seabed evolution. At first, a positive feedback mechanism drives a rapid increase in the rate of morphological change, beach three-dimensionality, and rip intensity. By the time the sandbar evolves into a bar and rip morphology, a negative feedback mechanism, characterized by a decaying beach change rate and an increasing beach alongshore uniformity, overwhelms the former mechanism. An erosive sequence characterized by both an overall offshore bar migration and an increase in beach three-dimensionality is also described.

Michallet, H.; Castelle, B.; BarthéLemy, E.; Berni, C.; Bonneton, P.

2013-06-01

386

Journal of Coastal Research 26 1 184198 West Palm Beach, Florida January 2010 Limits of Wave Runup and Corresponding Beach-Profile  

E-print Network

. ADDITIONAL INDEX WORDS: Beach erosion, nearshore sediment transport, wave breaking, cross-shore sediment of beach erosion. The limit of wave runup is also a key parameter in the application of the stormJournal of Coastal Research 26 1 184­198 West Palm Beach, Florida January 2010 Limits of Wave Runup

US Army Corps of Engineers

387

75 FR 77010 - Nextera Energy Point Beach, LLC; Point Beach Nuclear Plant, Units 1 and 2, Draft Environmental...  

Federal Register 2010, 2011, 2012, 2013

...increase the maximum thermal power at the Point Beach Nuclear Plant (PBNP), Units 1 and...One Light-Water-Cooled Nuclear Power Reactor. Therefore, there...Evaluating Design Basis Accidents at Nuclear Power Reactors. The analyses...

2010-12-10

388

Assimilation and loss of sup 109 Cd and sup 65 Zn by the terrestrial isopods Oniscus asellus and Porcellio scaber  

SciTech Connect

Terrestrial isopods (woodlice) have been the subject of numerous publications on the dynamics of metals in terrestrial invertebrates. They are of particular interest due to the ability of the hepatopancreas of woodlice to accumulate zinc, cadmium, lead and copper to very high concentrations. In a recent study, Hopkin showed that O. asellus from a zinc-contaminated site was able to excrete this metal at a faster rate than P. scaber when both species were fed an uncontaminated diet. In contrast, O. asellus had a greater affinity for cadmium and retained this metal to a much greater extent than P. scaber. In this paper, the rates of assimilation and excretion of two of these metals have been quantified by feeding O. asellus and P. scaber on leaves contaminated with radioactive isotopes of zinc and cadmium.

Hames, C.A.C.; Hopkin, S.P. (Univ. of Reading, (United Kingdom))

1991-09-01

389

Inhibition of acetylcholinesterase activity in the terrestrial isopod Porcellio scaber as a biomarker of organophosphorus compounds in food.  

PubMed

This paper describes the toxicity of organophosphorus pesticide diazinon in juvenile and adult terrestrial isopods Porcellio scaber (Isopoda, Crustacea). The woodlice were exposed to different concentrations of diazinon added to food (5, 10, 50, and 100 or 150 micrograms/g dry food). Weight change and food assimilation efficiency were determined two and four weeks after the exposure. The activity of acetylcholinesterase (AChE) in surviving animals was measured at the end of the experiment. The results show that woodlice exposed to diazinon do not significantly differ from controls in growth and feeding rate. The reduction of AChE activity was observed at the lowest diazinon exposure (5 and 10 micrograms/g dry food). These results suggest that AChE activity might prove a useful biomarker, indicating low levels of organophosphates in food. PMID:14677365

Stanek, Katja; Gabrijelcic, Elizabeta; Drobne, Damjana; Trebse, Polonca

2003-09-01

390

A complex evolutionary history in a remote archipelago: phylogeography and morphometrics of the Hawaiian endemic Ligia isopods.  

PubMed

Compared to the striking diversification and levels of endemism observed in many terrestrial groups within the Hawaiian Archipelago, marine invertebrates exhibit remarkably lower rates of endemism and diversification. Supralittoral invertebrates restricted to specific coastal patchy habitats, however, have the potential for high levels of allopatric diversification. This is the case of Ligia isopods endemic to the Hawaiian Archipelago, which most likely arose from a rocky supralittoral ancestor that colonized the archipelago via rafting, and diversified into rocky supralittoral and inland lineages. A previous study on populations of this isopod from O'ahu and Kaua'i revealed high levels of allopatric differentiation, and suggested inter-island historical dispersal events have been rare. To gain a better understanding on the diversity and evolution of this group, we expanded prior phylogeographic work by incorporating populations from unsampled main Hawaiian Islands (Maui, Moloka'i, Lana'i, and Hawai'i), increasing the number of gene markers (four mitochondrial and two nuclear genes), and conducting Maximum likelihood and Bayesian phylogenetic analyses. Our study revealed new lineages and expanded the distribution range of several lineages. The phylogeographic patterns of Ligia in the study area are complex, with Hawai'i, O'ahu, and the Maui-Nui islands sharing major lineages, implying multiple inter-island historical dispersal events. In contrast, the oldest and most geographically distant of the major islands (Kaua'i) shares no lineages with the other islands. Our results did not support the monophyly of all the supralittoral lineages (currently grouped into L. hawaiensis), or the monophyly of the terrestrial lineages (currently grouped into L. perkinsi), implying more than one evolutionary transition between coastal and inland forms. Geometric-morphometric analyses of three supralittoral clades revealed significant body shape differences among them. A taxonomic revision of Hawaiian Ligia is warranted. Our results are relevant for the protection of biodiversity found in an environment subject to high pressure from disturbances. PMID:24386463

Santamaria, Carlos A; Mateos, Mariana; Taiti, Stefano; DeWitt, Thomas J; Hurtado, Luis A

2013-01-01

391

A Complex Evolutionary History in a Remote Archipelago: Phylogeography and Morphometrics of the Hawaiian Endemic Ligia Isopods  

PubMed Central

Compared to the striking diversification and levels of endemism observed in many terrestrial groups within the Hawaiian Archipelago, marine invertebrates exhibit remarkably lower rates of endemism and diversification. Supralittoral invertebrates restricted to specific coastal patchy habitats, however, have the potential for high levels of allopatric diversification. This is the case of Ligia isopods endemic to the Hawaiian Archipelago, which most likely arose from a rocky supralittoral ancestor that colonized the archipelago via rafting, and diversified into rocky supralittoral and inland lineages. A previous study on populations of this isopod from O?ahu and Kaua?i revealed high levels of allopatric differentiation, and suggested inter-island historical dispersal events have been rare. To gain a better understanding on the diversity and evolution of this group, we expanded prior phylogeographic work by incorporating populations from unsampled main Hawaiian Islands (Maui, Moloka?i, Lana?i, and Hawai?i), increasing the number of gene markers (four mitochondrial and two nuclear genes), and conducting Maximum likelihood and Bayesian phylogenetic analyses. Our study revealed new lineages and expanded the distribution range of several lineages. The phylogeographic patterns of Ligia in the study area are complex, with Hawai?i, O?ahu, and the Maui-Nui islands sharing major lineages, implying multiple inter-island historical dispersal events. In contrast, the oldest and most geographically distant of the major islands (Kaua?i) shares no lineages with the other islands. Our results did not support the monophyly of all the supralittoral lineages (currently grouped into L. hawaiensis), or the monophyly of the terrestrial lineages (currently grouped into L. perkinsi), implying more than one evolutionary transition between coastal and inland forms. Geometric-morphometric analyses of three supralittoral clades revealed significant body shape differences among them. A taxonomic revision of Hawaiian Ligia is warranted. Our results are relevant for the protection of biodiversity found in an environment subject to high pressure from disturbances. PMID:24386463

Santamaria, Carlos A.; Mateos, Mariana; Taiti, Stefano; DeWitt, Thomas J.; Hurtado, Luis A.

2013-01-01

392

Phylogeography of Supralittoral Rocky Intertidal Ligia Isopods in the Pacific Region from Central California to Central Mexico  

PubMed Central

Background Ligia isopods are widely distributed in the Pacific rocky intertidal shores from central California to central Mexico, including the Gulf of California. Yet, their biological characteristics restrict them to complete their life cycles in a very narrow range of the rocky intertidal supralittoral. Herein, we examine phylogeographic patterns of Ligia isopods from 122 localities between central California and central Mexico. We expect to find high levels of allopatric diversity. In addition, we expect the phylogeographic patterns to show signatures of past vicariant events that occurred in this geologically dynamic region. Methodology/Principal Findings We sequenced two mitochondrial genes (Cytochrome Oxidase I and 16S ribosomal DNA). We conducted Maximum Likelihood and Bayesian phylogenetic analyses. We found many divergent clades that, in general, group according to geography. Some of the most striking features of the Ligia phylogeographic pattern include: (1) deep mid-peninsular phylogeographic breaks on the Pacific and Gulf sides of Baja peninsula; (2) within the Gulf lineages, the northern peninsula is most closely related to the northern mainland, while the southern peninsula is most closely related to the central-southern mainland; and, (3) the southernmost portion of the peninsula (Cape Region) is most closely related to the southernmost portion of mainland. Conclusions/Significance Our results shed light on the phylogenetic relationships of Ligia populations in the study area. This study probably represents the finest-scale phylogeographic examination for any organism to date in this region. Presence of highly divergent lineages suggests multiple Ligia species exist in this region. The phylogeographic patterns of Ligia in the Gulf of California and Baja peninsula are incongruent with a widely accepted vicariant scenario among phylogeographers, but consistent with aspects of alternative geological hypotheses and phylo- and biogeographic patterns of several other taxa. Our findings contribute to the ongoing debate regarding the geological origin of this important biogeographic region. PMID:20657776

Hurtado, Luis A.; Mateos, Mariana; Santamaria, Carlos A.

2010-01-01

393

The responses of artificial embayed beaches to storm events  

NASA Astrophysics Data System (ADS)

The plan-view and the profile shape of sandy beaches largely depend on the incoming wave-energy (Wright and Short, 1984). In this sense, storm events are responsible for major changes in the configuration of sandy beaches and the cumulative effect of storms and fair-weather conditions determines the morphodynamic state of a certain beach. With increasing wave energy, the beach will change from the Reflective state to the Low Tide Terrace, Transverse Bar and Rip, Rhythmic Bar and Beach, Longshore Bar and Trough and finally to the Dissipative beach state. These morphodynamic states are also observed at artificial embayed beaches, although artificial groins limit alongshore sediment transport and protect sections of the beach from waves approaching from a range of directions (Short and Masselink, 1999). This contribution focuses on the morphological changes of the shoreline and the submerged sandbars of artificial embayed (sandy) beaches due to the effect of high-wave conditions associated to storms. We characterize the morphological response of the emerged and submerged beach profile of two of the artificial embayed beaches of the Barcelona city coast (NW Mediterranean). The two embayed beaches under study are single-barred beaches subject to the same climatic conditions but with different morphological characteristics. The study comprises more than 4 years of data, from November 2001 to March 2006, obtained through an Argus video system (Holman and Stanley, 2007). The extraction of the shoreline and barline locations is accomplished using 10-minute time-exposure video images. Shorelines were extracted directly from oblique images (see Ojeda and Guillén, [2008] for a complete description) and rectified afterwards. Sandbars were inferred from the rectified time-exposure video images based on the preferential wave breaking over shallow areas, so they required a minimum significant wave height (Hs) which allowed the occurrence of a clear wave-breaking pattern. The barline extraction was accomplished through an automated alongshore tracking of the intensity maxima across each beach section (Van Enckevort and Ruessink, 2001). The mean Hs during the study period was 0.71 m and the averaged peak period was 5.7 s. The wave height time series shows a cyclic behaviour, with storm periods (October-April) separated by periods of low storm activity (May-October). The two most energetic periods affecting the beaches were from October 2001 to May 2002 and from October 2003 to April 2004 (wave data were obtained from a WANA node [virtual buoy] and direct measurements of the Barcelona-Coastal buoy). Approximately 25 storm events have been identified during the study period (following Ojeda and Guillén [2008], significant storms were defined as those with Hs higher than 2.5 m during the peak of the storm and a minimum duration of 12 h with Hs greater than 1.5 m). The morphological responses of the beach to the storm action determine the morphodynamic state. These responses were grouped into five categories: shoreline advance or retreat, beach rotation, sandbar migration, formation of megacusps, and changes in the sandbar configuration (linear or crescentic shape). The intensity and frequency of these modifications were different in both beaches. Regarding the changes in the morphodynamic state of the beaches, the bar at Bogatell switched more frequently among the four intermediate morphodynamic states during the study period than the bar at La Barceloneta. The bar at La Barceloneta only underwent the complete "reset" of the nearshore morphology (i.e., abrupt change of the plan-view shape of the beach towards a Longshore Bar and Trough state) once, associated with the high-energy wave event occurring on November 2001. At this beach, the strongest storm events produced the offshore migration of the bar and a certain decrease in the bar sinuosity, but did not generate an alongshore parallel bar. Similar storms caused different effects on the two adjacent beaches and, furthermore, the effect of storms of similar characteristics at t

Ojeda, E.; Guillén, J.; Ribas, F.

2009-09-01

394

Heart Rate and Motion Analysis by GPS in Beach Soccer  

PubMed Central

Although beach soccer has become increasingly popular in recent years very little scientific research has been conducted into the sport. A pilot study was carried out with the aim of examining the physiological (heart rate) and physical (motion analysis) responses of beach soccer players during competitive matches. Ten players (age 25.5 ± 0.5 years; height 1.80 ± 0.08 m; weight 78.2 ± 5.6 kg.) were studied over five beach soccer matches. The physiological demands were analysed by measuring heart rate (HR) using telemetric devices, while the physical profile was evaluated by recording motion and speed by means of GPS devices. During competitive matches, players obtained a HRmean of 165.2 bpm (86.5% HRmax), with 59.3% of the time participating (TP) corresponding to values above 90% of the HRmax. The distance covered per minute of participation was 97.7 m, with 9.5% of this distance corresponding to high-intensity running and 2.5% to sprint; the work:rest ratio was 1.4:1 and the maximum speed 21.7 km·h-1. These results showed that beach soccer is an intermittent physical activity of greater intensity than other team games. It requires a major contribution from the anaerobic system as emphasis is placed on players making quick bursts of high-intensity activity separated by brief rest periods. Key points The distance covered per minute of play is around 100 m. Beach soccer is an intermittent sport with a work:rest ratio of 1.4:1. The playing surface in beach soccer is an important handicap to obtain maximum speeds. Beach soccer has a high physiological intensity, with more than half of the game is spent at intensities above 90 % of the HRmax. PMID:24149392

Castellano, Julen; Casamichana, David

2010-01-01

395

Monitoring and modeling nearshore dredge disposal for indirect beach nourishment, Ocean Beach, San Francisco  

USGS Publications Warehouse

Nearshore dredge disposal was performed during the summer of 2005 at Ocean Beach, San Francisco, CA, a high energy tidal and wave environment. This trial run was an attempt to provide a buffer to a reach of coastline where wave attack during the winter months has had a severe impact on existing sewage infrastructure. Although the subsequent beach response was inconclusive, after one year the peak of the disposal mound had migrated ~100 m toward the shore, providing evidence that annual dredge disposal at this site could be beneficial over the long-term by at the very least providing: 1) additional wave dissipation during storms 2) compatible sediment to feed nearshore bars, 3) sediment cover on an exposed sewage outfall pipe, and 4) a viable alternative to the shoaling offshore disposal site. Numerical modeling suggests that despite the strong tidal currents in the region, wave forcing is the dominant factor moving the sediment slowly toward shore, and placing sediment at just slightly shallower depths (e.g. 9 m) in the future would have a more immediate impact.

Barnard, Patrick L.; Hanes, Daniel M.; Lescinski, Jamie; Elias, Edwin

2007-01-01

396

33 CFR 100.35T05-0482 - Special Local Regulations for Marine Events, Wrightsville Channel; Wrightsville Beach, NC.  

Code of Federal Regulations, 2013 CFR

...Events, Wrightsville Channel; Wrightsville Beach, NC. 100.35T05-0482 Section 100...Events, Wrightsville Channel; Wrightsville Beach, NC. (a) Regulated area. The following...48?44? West, at Wrightsville Beach, North Carolina. All coordinates...

2013-07-01

397

The effect of two mechanical beach grooming strategies on Escherichia coli density in beach sand at a southwestern Lake Michigan beach  

Microsoft Academic Search

The influence of indicator bacteria associated with beach sands on recreational water quality has become increasingly recognized. Constant wave action may serve as a transport mechanism for delivering bacterial organisms to surface waters resulting in an increased frequency of dry weather advisories. The ability to reduce the concentration of these organisms may serve to improve recreational water quality. To date,

J. L. Kinzelman; K. R. Pond; K. D. Longmaid; R. C. Bagley

2004-01-01

398

Responses of the hepatopancreatic ‘B’ cells of a terrestrial isopod, Oniscus asellus , to metals accumulated from a contaminated habitat: A morphometric analysis  

Microsoft Academic Search

The four-lobed hepatopancreas of terrestrial isopods is a highly specialized enzyme secretory, digestive and absorptive region of the midgut. The walls of these blindending tubes are composed of two distinctive epithelial cell types: large, lipid-rich B-cells projecting into the lumen; and small S cells containg (Cu+S)-rich granules. This study investigated the possible stressful effects of accumulated Pb and Zn on

A. John Morgan; Zara D. E. Gregory; Carole Winters

1990-01-01

399

‘ Candidatus Hepatincola porcellionum’ gen. nov., sp. nov., a new, stalk-forming lineage of Rickettsiales colonizing the midgut glands of a terrestrial isopod  

Microsoft Academic Search

The midgut glands (hepatopancreas) of terrestrial isopods are densely colonized by hitherto uncultivated bacteria. In the case of the Common Woodlouse, Porcellio scaber (Crustacea: Isopoda), the symbionts represent a novel lineage in the a-subdivision of Proteobacteria. Based on comparative sequence analysis of their 16S rRNA genes, their closest (albeit distant) relatives were among the Rickettsiales, which are intracellular symbionts or

Yongjie Wang; Ulrich Stingl; Friederike Anton-Erxleben; Martin Zimmer; Andreas Brune

2004-01-01

400

Neurosecretory action potentials recorded extracellularly from a neurohemal region associated with the Y-organ in the terrestrial isopod, Oniscus asellus  

Microsoft Academic Search

Summary A long duration (over 30 ms), large amplitude (up to 1000 ?V) action potential, was recorded by an extracellular electrode placed near the Y-organ, or molting gland, of the terrestrial isopod,Oniscus asellus. This action potential discharged in a slow tonic fashion (0.20–40.0 spikes per min), and eminated from the lateral nerve plexus (LNP), a neurohemal region believed to control,

R. G. Chiang

1987-01-01

401

Detection and phylogeny of the bacteria Wolbachia in the terrestrial isopod Porcellio laevis Latr. (Crustacea, Oniscoidea), isolated from Lebna and Bizerte stations, Tunisia  

Microsoft Academic Search

Wolbachia Hertig, 1936, is an intracytoplasmic bacterium that infects several species of arthropods by causing deterioration of host\\u000a reproduction. In terrestrial isopods, Wolbachia infection can generate cytoplasmic incompatibility and feminization. This work examined two samples of Wolbachia from two different stations in Tunisia (Lebna in the North-East, and Bizerte in the North), and the study is limited to the\\u000a host

Sarra Ben Nasr; Maher Gtari; Atf Azzouna

2010-01-01

402

Low faunal diversity on Maltese sandy beaches: fact or artefact?  

NASA Astrophysics Data System (ADS)

Eight sandy beaches on Malta and two on Gozo were sampled for macrofauna to test the hypothesis that Maltese beaches have an intrinsically low diversity. Stations distributed in the supralittoral (dry zone), mediolittoral (wet zone) and upper infralittoral (submerged zone to 1 m water depth) were sampled by sieving core samples and standardised searching during daytime, and pitfall trapping and standardised sweeping of the water column using a hand-net at night, as appropriate. Physical parameters of the sediment were measured and human occupancy of the beaches was estimated. From the supralittoral and mediolittoral, 39 species represented by 1584 individuals were collected by the combined techniques of pitfall trapping, sieving and standard searching. For Ramla beach, which had the highest diversity, 267 individuals representing 25 infaunal species were collected by sieving from a combined volume of 1.175 m 3 of sand, and 149 individuals representing 28 epifaunal species were collected by standardised searching from a combined area of 700 m 2 of sand during two winter and two summer sampling sessions between 1992 and 1993. For nine other beaches sampled during the summer of 2000, only six macrofaunal species were collected from core samples, with overall population densities ranging from 4.13 to 45.45 individuals m -2. Only 92 individuals belonging to 12 species were collected by hand-net from the uppermost infralittoral of five beaches sampled using this method during the summer of 2000. Taxa of gastropods, bivalves, decapods, mysids and staphylinid beetles generally abundant on Mediterranean sandy beaches, were entirely absent from the beaches sampled. Few correlations that could explain the impoverishment of Maltese sandy beaches were found between physical parameters and faunal abundances, and other factors such as inadequate sampling effort, human disturbance and marine pollution were also excluded; however, seasonally biased sampling may partly explain the results obtained. One factor that may explain why certain species are missing could be lack of recruitment, due to Malta's geographical isolation from the European and African mainlands.

Deidun, Alan; Azzopardi, Marthese; Saliba, Stephen; Schembri, Patrick J.

2003-10-01

403

Water quality, weather and environmental factors associated with fecal indicator organism density in beach sand at two recreational marine beaches.  

PubMed

Recent studies showing an association between fecal indicator organisms (FIOs) in sand and gastrointestinal (GI) illness among beachgoers with sand contact have important public health implications because of the large numbers of people who recreate at beaches and engage in sand contact activities. Yet, factors that influence fecal pollution in beach sand remain unclear. During the 2007 National Epidemiological and Environmental Assessment of Recreational (NEEAR) Water Study, sand samples were collected at three locations (60m apart) on weekend days (Sat, Sun) and holidays between June and September at two marine beaches - Fairhope Beach, AL and Goddard Beach, RI - with nearby publicly-owned treatment works (POTWs) outfalls. F(+) coliphage, enterococci, Bacteroidales, fecal Bacteroides spp., and Clostridium spp. were measured in sand using culture and qPCR-based calibrator-cell equivalent methods. Water samples were also collected on the same days, times and transects as the 144 sand samples and were assayed using the same FIO measurements. Weather and environmental data were collected at the time of sample collection. Mean FIO concentrations in sand varied over time, but not space. Enterococci CFU and CCE densities in sand were not correlated, although other FIOs in sand were. The strongest correlation between FIO density in sand and water was fecal Bacteroides CCE, followed by enterococci CFU, Clostridium spp. CCE, and Bacteroidales CCE. Overall, the factors associated with FIO concentrations in sand were related to the sand-water interface (i.e., sand-wetting) and included daily average densities of FIOs in water, rainfall, and wave height. Targeted monitoring that focuses on daily trends of sand FIO variability, combined with information about specific water quality, weather, and environmental factors may inform beach monitoring and management decisions to reduce microbial burdens in beach sand. The views expressed in this paper are those of the authors and do not necessarily reflect the views or policies of the U.S. Environmental Protection Agency. PMID:25150738

Heaney, Christopher D; Exum, Natalie G; Dufour, Alfred P; Brenner, Kristen P; Haugland, Richard A; Chern, Eunice; Schwab, Kellogg J; Love, David C; Serre, Marc L; Noble, Rachel; Wade, Timothy J

2014-11-01

404

Behavioural adaptations in talitrids from two Atlantic beaches  

NASA Astrophysics Data System (ADS)

The aim of the present study was to test sun orientation and rhythmic activity of two sandhopper populations from two Atlantic macro-tidal beaches. A population from Le Verger beach (orientated to 346°, Ille et Vilaine, Brittany, France) and a population from Damgan (orientated to 195°, Morbihan, Brittany, France), were tested on the beach under clear sky discriminating for landscape vision. For both populations locomotor activity rhythm was recorded in the laboratory. The two beaches differed for climatic features, tidal range and for human use. Both talitrid populations resulted very well orientated toward the shoreline, and both used solar position and landscape vision to orient. However the multiple regression analysis of orientation with climatic features showed a different use of local cues by the two populations and a slight influence of tidal regime (ebbing and rising tide), in spite of the supralittoral zonation of sandhoppers. In the laboratory they showed a well defined rhythmic behaviour as well as a bimodal rhythmicity, explained as a tidal one. These results are a new brick in the complex picture of orientation and rhythm studies on sandy beach invertebrates.

Rossano, Claudia; Gambineri, Simone; Fanini, Lucia; Durier, Virginie; Rivault, Colette; Scapini, Felicita

2009-12-01

405

New beach ridge type: severely limited fetch, very shallow water  

SciTech Connect

The southern end of Laguna Madre (Texas) north of the Rio Grande mouth is marked by very shallow water, wide tidal flats, lunettes, islands made of beach ridges, and lesser features. The number and variety of islands in the lagoon is remarkable. The lunettes (clay dunes) are made primarily of quartz sand and coarse silt. They are common 5-10 m high, irregular in shape, and steep sided. They were deposited from wind transport and did not migrate. Those that are islands in the lagoon predate present position of sea level. Islands made of beach ridges were built from the lagoon side. Photoanalysis, field work, and granulometry all show that this sand was not moved into these ridges by Gulf of Mexico waves. Trenches in 12 beach ridges showed horizontal bedding but neither low-angle nor steep cross-bedding (quite unlike swash-built beach ridges). The ridges were built by wind-tide lag effects, not from the swash. Therefore, these beach ridges are a new type, in addition to swash-built, eolian, and storm-surge ridges. Growth of the ridges appears to be completed.

Tanner, W.F.; Demirpolat, S.

1988-09-01

406

Upon exposure to Cu nanoparticles, accumulation of copper in the isopod Porcellio scaber is due to the dissolved Cu ions inside the digestive tract.  

PubMed

The fate of nanoparticles in organisms is of significant interest. In the current work, we used a test system with terrestrial isopods (Porcellio scaber) fed with food spiked with Cu NPs or soluble Cu salt for 14 days. Two different doses were used for spiking to yield final concentrations of 2000 and 5000 ?g Cu/g dry food. After the exposure period, part of the exposed group of animals was transferred to clean food to depurate. Cu content was analyzed in the digestive glands, gut, and the 'rest' of the body. Similar patterns of (i) assimilated and depurated amounts of Cu, (ii) Cu body distribution, and (iii) effect on isopods feeding behavior were observed regardless of whether the animals were fed with Cu NPs or soluble Cu salt spiked food. Thus, Cu ions and not Cu NPs were assimilated by the digestive gland cells. Solubilization of the Cu NPs applied to the leaves was also analyzed with chemical methods and recombinant Cu-sensing bacteria. The comparison of the in vitro data on solubilization of Cu NPs and in vivo data on Cu accumulation in the animal tissues showed that about 99% of accumulated copper ions was dissolved from ingested Cu NPs in the digestive system of isopods. PMID:23046103

Golobi?, Miha; Jemec, Anita; Drobne, Damjana; Romih, Tea; Kasemets, Kaja; Kahru, Anne

2012-11-01

407

The distribution and abundance of Sphaeroma terebrans, a wood-boring isopod of red mangrove (Rhizophora mangle) habitat within Tampa Bay  

USGS Publications Warehouse

This study was conducted to determine the distribution, abundance, and demography of a wood boring isopod, Sphaeroma terebrans Bate, 1866, within the prop roots of the red mangrove, Rhizophora mangle L., in eight sites within Tampa Bay, Florida. Sphaeroma terebrans in Tampa Bay displayed reproductive activity year-round and bay-wide synchrony in their density pattern. On average approximately 60% (range: 25%-86%) of the intertidal aerial roots surveyed were occupied by S. terebrans. Although infestation levels by S. terebrans in Tampa Bay were similar to that of more tropical regions, the distribution of S. terebrans was not continuous throughout the study sites. A substantially higher occurrence and density of S. terebrans was found in the northern compared to more southern study sites within the Bay. Additionally, some seemingly suitable areas of the bay (i.e., Pinellas Point, Skyway, Fort Desoto) were actually unoccupied on some dates. Although sites differed in the frequency with which roots were attacked, the density of burrows and isopods in an occupied root was similar, with most attacked roots containing 3-5 burrows. The results of a transplantation experiment indicated that neither abiotic factors nor substrate quality limit the burrowing capabilities or survival of adult S. terebrans in the areas where they are absent. Instead, dispersal limitation, linked with differential juvenile survival, most likely controls isopod distribution and abundance within Tampa Bay.

Brooks, R. A.; Bell, S. S.

2005-01-01

408

33 CFR 165.1155 - Security Zone; Diablo Canyon Nuclear Power Plant, Avila Beach, California.  

... Security Zone; Diablo Canyon Nuclear Power Plant, Avila Beach, California... Security Zone; Diablo Canyon Nuclear Power Plant, Avila Beach, California...000 yard radius of Diablo Canyon Nuclear Power Plant centered at position...

2014-07-01

409

Beach1 functionally antagonizes Rab11 during development and in regulating synaptic morphology  

E-print Network

BEACH proteins comprise an evolutionarily conserved family characterized by the presence of a BEACH (Beige and Chediak-Higashi) domain of unknown function. They have been shown to play a role in a number of important ...

Khodosh, Rita

2005-01-01

410

US Army Symposium on Solid Mechanics (15th : 1999-Myrtle Beach, S.C.),  

E-print Network

US Army Symposium on Solid Mechanics (15th : 1999-Myrtle Beach, S.C.), edited by Kailasam Iyer Symposium on Solid Mechanics (15th : 1999-Myrtle Beach, S.C.), edited by Kailasam Iyer and Shun-chin Chou

Stewart, Sarah T.

411

33 CFR 165.1155 - Security Zone; Diablo Canyon Nuclear Power Plant, Avila Beach, California.  

Code of Federal Regulations, 2011 CFR

... Security Zone; Diablo Canyon Nuclear Power Plant, Avila Beach, California... Security Zone; Diablo Canyon Nuclear Power Plant, Avila Beach, California...000 yard radius of Diablo Canyon Nuclear Power Plant centered at position...

2011-07-01

412

33 CFR 165.1155 - Security Zone; Diablo Canyon Nuclear Power Plant, Avila Beach, California.  

Code of Federal Regulations, 2012 CFR

... Security Zone; Diablo Canyon Nuclear Power Plant, Avila Beach, California... Security Zone; Diablo Canyon Nuclear Power Plant, Avila Beach, California...000 yard radius of Diablo Canyon Nuclear Power Plant centered at position...

2012-07-01

413

33 CFR 165.1155 - Security Zone; Diablo Canyon Nuclear Power Plant, Avila Beach, California.  

Code of Federal Regulations, 2010 CFR

... Security Zone; Diablo Canyon Nuclear Power Plant, Avila Beach, California... Security Zone; Diablo Canyon Nuclear Power Plant, Avila Beach, California...000 yard radius of Diablo Canyon Nuclear Power Plant centered at position...

2010-07-01

414

33 CFR 165.1155 - Security Zone; Diablo Canyon Nuclear Power Plant, Avila Beach, California.  

Code of Federal Regulations, 2013 CFR

... Security Zone; Diablo Canyon Nuclear Power Plant, Avila Beach, California... Security Zone; Diablo Canyon Nuclear Power Plant, Avila Beach, California...000 yard radius of Diablo Canyon Nuclear Power Plant centered at position...

2013-07-01

415

33 CFR 263.26 - Small beach erosion control project authority (Section 103).  

Code of Federal Regulations, 2010 CFR

...DEPARTMENT OF DEFENSE CONTINUING AUTHORITIES PROGRAMS Shore Protection Policy § 263.26 Small beach erosion control...of the Army is authorized to undertake construction of small shore and beach restoration and protection projects not...

2010-07-01

416

Experimental study to determine basic performance characteristics of recycled glass as beach nourishment material  

E-print Network

Since significant amounts of recycled glass may be used as a substitute of materials for beach nourishment in urban beaches, laboratory experiments were proposed to understand the performance characteristics of glass versus natural sand. A first...

Cruz Castro, Oscar

2012-06-07

417

33 CFR 162.215 - Lake Tahoe, Nev.; restricted area adjacent to Nevada Beach.  

Code of Federal Regulations, 2013 CFR

...false Lake Tahoe, Nev.; restricted area adjacent to Nevada Beach. 162.215 Section 162.215 Navigation and Navigable...215 Lake Tahoe, Nev.; restricted area adjacent to Nevada Beach. (a) The restricted area. The waters of...

2013-07-01

418

Health effects associated with cyanobacteria exposure among beach attendees in Puerto Rico  

EPA Science Inventory

Cyanobacteria and their toxins are associated with adverse human health effects, although among marine waters, the pyrrhophyta, including dinoflagellates are more recognized as health hazards. We recruited beach attendees during summer 2009, at Boquerón Beach, Puerto Rico...

419

Do's and Don'ts for Protecting Your Health and Your Beach's Health  

MedlinePLUS

... Beach's Health Dos and Dont's for Protecting Your Health and Your Beach's Health You can do several things to keep yourself ... closed. Learn more about the risks to your health . Be sun safe Check the UV Index Use ...

420

Equilibrium shoreline response of a high wave energy beach  

NASA Astrophysics Data System (ADS)

Four years of beach elevation surveys at Ocean Beach, San Francisco, California, are used to extend an existing equilibrium shoreline change model, previously calibrated with fine sand and moderate energy waves, to medium sand and higher-energy waves. The shoreline, characterized as the cross-shore location of the mean high water contour, varied seasonally by between 30 and 60 m, depending on the alongshore location. The equilibrium shoreline change model relates the rate of horizontal shoreline displacement to the hourly wave energy E and the wave energy disequilibrium, the difference between E and the equilibrium wave energy that would cause no change in the present shoreline location. Values for the model shoreline response coefficients are tuned to fit the observations in 500 m alongshore segments and averaged over segments where the model has good skill and the estimated effects of neglected alongshore sediment transport are relatively small. Using these representative response coefficients for 0.3 mm sand from Ocean Beach and driving the model with much lower-energy winter waves observed at San Onofre Beach (also 0.3 mm sand) in southern California, qualitatively reproduces the small seasonal shoreline fluctuations at San Onofre. This consistency suggests that the shoreline model response coefficients depend on grain size and may be constant, and thus transportable, between sites with similar grain size and different wave climates. The calibrated model response coefficients predict that for equal fluctuations in wave energy, changes in shoreline location on a medium-grained (0.3 mm) beach are much smaller than on a previously studied fine-grained (0.2 mm) beach.

Yates, M. L.; Guza, R. T.; O'Reilly, W. C.; Hansen, J. E.; Barnard, P. L.

2011-04-01

421

Plastic Pollution at a Sea Turtle Conservation Area in NE Brazil: Contrasting Developed and Undeveloped Beaches  

Microsoft Academic Search

Sea turtles are highly susceptible to plastic ingestion and entanglement. Beach debris were surveyed along the most important\\u000a sea turtle nesting beaches in Brazil (Costa dos Coqueiros, Bahia State). No significant differences among developed and undeveloped\\u000a beaches were observed in terms of total number of items. Local sources (tourism activities) represented 70% of debris on developed\\u000a beaches, where cigarette butts,

Juliana Assunção Ivar do Sul; Isaac R. Santos; Ana Cláudia Friedrich; Alexandre Matthiensen; Gilberto Fillmann

2011-01-01

422

Hurricane Sandy caused extreme erosion of New York beaches  

NASA Astrophysics Data System (ADS)

Beaches on Fire Island, New York, lost more than half of their sand as a result of Hurricane Sandy, according to a new report by the U.S. Geological Survey (USGS). Fire Island is one of the barrier islands along the south shore of Long Island, N. Y. The finding, released 27 August, involved field surveys conducted before and after the storm. In addition, the researchers used lidar and aerial photography to evaluate changes to the beaches and shoreline and determined the volume and distribution of overwash deposits that were carried to the island's interior following the storm.

Balcerak, Ernie

2013-09-01

423

78 FR 669 - Drawbridge Operation Regulation; Atlantic Intracoastal Waterway, Wrightsville Beach, NC  

Federal Register 2010, 2011, 2012, 2013

...Quintiles Wrightsville Beach Full and Half Marathon. This deviation allows the bridge to...Quintiles Wrightsville Beach Full and Half Marathon committee on behalf of the North Carolina...Quintiles Wrightsville Beach Full and Half Marathon scheduled for Sunday, March 17,...

2013-01-04

424

77 FR 5184 - Drawbridge Operation Regulation; Atlantic Intracoastal Waterway, Wrightsville Beach, NC  

Federal Register 2010, 2011, 2012, 2013

...Quintiles Wrightsville Beach Full and Half Marathon. This deviation allows the bridge to...Quintiles Wrightsville Beach Full and Half Marathon committee on behalf of the North Carolina...Quintiles Wrightsville Beach Full and Half Marathon scheduled for Sunday, March 18,...

2012-02-02

425

78 FR 72022 - Drawbridge Operation Regulation; Atlantic Intracoastal Waterway, Wrightsville Beach, NC  

Federal Register 2010, 2011, 2012, 2013

...Quintiles Wrightsville Beach Full and Half Marathon. This deviation allows the bridge to...Quintiles Wrightsville Beach Full and Half Marathon committee on behalf of the North Carolina...Quintiles Wrightsville Beach Full and Half Marathon scheduled for Sunday, March 16,...

2013-12-02

426

On the design of beach nourishment projects using static equilibrium concepts: Application to the Spanish coast  

Microsoft Academic Search

The concept of equilibrium plan form and equilibrium profile has been widely used as an engineering tool in order to design beach nourishment projects. The scope of this paper is to further explore this “equilibrium beach” concept in crenulated bays, as a long-term tool for beach nourishment projects. The proposed methodology is based on González and Medina (2001) and combines

Mauricio González; Raul Medina; Miguel Losada

2010-01-01

427

Quantitative analysis of small-plastic debris on beaches in the Hawaiian archipelago  

Microsoft Academic Search

Small-plastic beach debris from nine coastal locations throughout the Hawaiian Archipelago was analyzed. At each beach, replicate 20 l samples of sediment were collected, sieved for debris between 1 and 15 mm in size, sorted by type, counted and weighed. Small-plastic debris occurred on all of the beaches, but the greatest quantity was found at three of the most remote

Karla J. McDermid; Tracy L. McMullen

2004-01-01

428

The age and stratigraphic context of the Easington Raised Beach, County Durham, UK  

Microsoft Academic Search

The Easington Raised Beach, in Shippersea Bay, County Durham, is the most northerly known interglacial beach deposit in England. It lies directly on Magnesian Limestone bedrock at 33m O.D. and is covered by glacial sediments attributed to the Devensian. Detailed sedimentological analysis suggests that it is an interglacial beach, which is supported by the presence of pebbles bored by marine

Bethan J. Davies; David R. Bridgland; David H. Roberts; Colm Ó. Cofaigh; Stephen M. Pawley; Ian Candy; Beatrice Demarchi; Kirsty E. H. Penkman; William E. N. Austin

2009-01-01

429

A new approximation for ocean waves propagating over a beach with variable depth  

Microsoft Academic Search

In this paper, the phenomenon of ocean waves propagating over a beach with variable water depth is re-examined. Based on the assumption of shallow water, a linearised shallow water equation is solved with an arbitrary beach profile. These irregular beach profiles form a set of partial differential equation with variable coefficient as the governing equation, which is the main obstacle

D.-S. Jeng; B. R. Seymour

2005-01-01

430

76 FR 77383 - Amendment of Class C Airspace; Palm Beach International Airport, FL  

Federal Register 2010, 2011, 2012, 2013

...Airspace Docket No. 11-AWA-2] Amendment of Class C Airspace; Palm Beach International Airport, FL...the Palm Beach International Airport, FL, Class C airspace area by raising the floor of Class C airspace over Palm Beach County Park Airport....

2011-12-13

431

76 FR 24813 - Safety Zone; Fourth Annual Offshore Challenge, Sunny Isles Beach, FL  

Federal Register 2010, 2011, 2012, 2013

...a temporary safety zone in the Atlantic Ocean east of Sunny Isles Beach, Florida...boat races will be held in the Atlantic Ocean offshore of Sunny Isles Beach...safety zone. All waters of the Atlantic Ocean east of Sunny Isles Beach,...

2011-05-03

432

77 FR 50062 - Safety Zone; Embry-Riddle Wings and Waves, Atlantic Ocean; Daytona Beach, FL  

Federal Register 2010, 2011, 2012, 2013

...Embry-Riddle Wings and Waves, Atlantic Ocean; Daytona Beach, FL AGENCY...safety zone on the waters of the Atlantic Ocean east of Daytona Beach, Florida...host an air show event over the Atlantic Ocean in Daytona Beach, FL. In...

2012-08-20

433

The trophic significance of the invasive seaweed Sargassum muticum in sandy beaches  

Microsoft Academic Search

Native and exotic seaweeds frequently lie on the beach and sustain part of the benthic food web. However, the role of exotic seaweeds as food sources for beach consumers has been poorly studied. We studied the temporal and spatial variability in the trophic significance of the invasive brown seaweed Sargassum muticum on sandy beaches. We measured the stable isotopes (?13C

Francesca Rossi; Celia Olabarria; Mónica Incera; Josefina Garrido

2010-01-01

434

An Algebraic Point of View on the Crane-Beach Clemens Lautemann, Pascal Tesson 1  

E-print Network

An Algebraic Point of View on the Crane-Beach Conjecture Clemens Lautemann, Pascal Tesson 1- ship in L. The Crane-Beach Conjecture, which was recently disproved, stated that any language-free language. More generally, we say that a logic or a computational model has the Crane Beach property

Therien, Denis

435

Persistence of fecal indicator bacteria in Santa Monica Bay beach sediments  

Microsoft Academic Search

Monitoring the water quality of recreational beaches is only one step toward understanding microbial contamination—the primary cause of beach closings. The surf zone sediment reservoir is typically overlooked and may also be important. This study involved monitoring the fecal indicator bacteria (FIB) levels in water and sediment at three ocean beaches (two exposed and one enclosed) during a storm event,

Christine M. Lee; Tiffany Y. Lin; Chu-Ching Lin; GoleNaz A. Kohbodi; Anita Bhatt; Robin Lee; Jennifer A. Jay

2006-01-01

436

Docket Number: 12-AFC-03 Project Title: Redondo Beach Energy Project  

E-print Network

facilities. RBEP will also include natural gas compressors, water treatment facilities, emergency services.m. Redondo Beach Performing Arts Center 1935 Manhattan Beach Blvd. Redondo Beach, CA 90278 (Map attached) #12 17, 2013, so that we can assure you a space. TELECONFERENCE OPTION: Parties and the Public may attend

437

WPTV News Channel 5 New hope for retail recovery in Palm Beach County  

E-print Network

WPTV News Channel 5 New hope for retail recovery in Palm Beach County Posted: 10/19/2011 By: Evan Axelbank PALM BEACH COUNTY, Fla. - When you don't have a job, every purchase becomes a calculation. "It Beach. Martin, 23, has applied for 10 jobs in the last week, mostly at retail outlets like Walmart

Belogay, Eugene A.

438

33 CFR 117.821 - Atlantic Intracoastal Waterway, Albermarle Sound to Sunset Beach.  

Code of Federal Regulations, 2013 CFR

...Intracoastal Waterway, Albermarle Sound to Sunset Beach. 117.821 Section 117.821 Navigation...Intracoastal Waterway, Albermarle Sound to Sunset Beach. (a) The drawbridges across the...specified in this paragraph: (1) Onslow Beach Swing Bridge, mile 240.7, at...

2013-07-01

439

40 CFR 227.10 - Hazards to fishing, navigation, shorelines or beaches.  

Code of Federal Regulations, 2013 CFR

...to fishing, navigation, shorelines or beaches. 227.10 Section 227.10 Protection...to fishing, navigation, shorelines or beaches. (a) Wastes which may present...may present a hazard to shorelines or beaches may be dumped only at sites and...

2013-07-01

440

Paired Open Beach Seines to Study Estuarine Migrations of Juvenile Salmon  

E-print Network

Paired Open Beach Seines to Study Estuarine Migrations of Juvenile Salmon HERBERT W. JAENICKE, ADRIAN G. CELEWYCZ, JACK E. BAILEY, and JOSEPH A. ORSI Figure I. - Location of beach seining sites along straight, long unobstructed beaches in southeastern Alaska. The seines were anchored in place

441

36 CFR 3.17 - What regulations apply to swimming areas and beaches?  

Code of Federal Regulations, 2011 CFR

...regulations apply to swimming areas and beaches? 3.17 Section 3.17 Parks...regulations apply to swimming areas and beaches? (a) The superintendent may designate areas as swimming areas or swimming beaches in accordance with §§ 1.5 and...

2011-07-01

442

Chuanlei Liu, Beach 2006, Lancaster,UK, 2nd-8th of July Spectroscopy and pentaquark  

E-print Network

Chuanlei Liu, Beach 2006, Lancaster,UK, 2nd-8th of July 1 ....... Spectroscopy and pentaquark;Chuanlei Liu, Beach 2006, Lancaster,UK, 2nd-8th of July 2 .............. 4-momentum transfer squared regimes 22 )( qpw += H1 ZEUS #12;Chuanlei Liu, Beach 2006, Lancaster,UK, 2nd-8th of July 3

443

Economic Impact of THE PLAYERS Championship Golf Tournament at Ponte Vedra Beach, Florida, May 2007  

E-print Network

1 Economic Impact of THE PLAYERS Championship Golf Tournament at Ponte Vedra Beach, Florida, May, for the first time since it was relocated to Ponte Vedra Beach, Florida, THE PLAYERS® Championship (TPC) golf, and this continued to be the case in 2007 with a purse totaling $9 million. Ponte Vedra Beach is located in the north

Florida, University of

444

36 CFR 3.17 - What regulations apply to swimming areas and beaches?  

Code of Federal Regulations, 2012 CFR

...regulations apply to swimming areas and beaches? 3.17 Section 3.17 Parks...regulations apply to swimming areas and beaches? (a) The superintendent may designate areas as swimming areas or swimming beaches in accordance with §§ 1.5 and...

2012-07-01

445

33 CFR 80.160 - Montauk Point, NY to Atlantic Beach, NY.  

Code of Federal Regulations, 2012 CFR

... false Montauk Point, NY to Atlantic Beach, NY. 80.160 Section 80.160 ...160 Montauk Point, NY to Atlantic Beach, NY. (a) A line drawn from the...the spit of land at the western end of Oak Beach. (d) A line drawn from Jones...

2012-07-01

446

33 CFR 117.821 - Atlantic Intracoastal Waterway, Albermarle Sound to Sunset Beach.  

Code of Federal Regulations, 2011 CFR

...Intracoastal Waterway, Albermarle Sound to Sunset Beach. 117.821 Section 117.821 Navigation...Intracoastal Waterway, Albermarle Sound to Sunset Beach. (a) The drawbridges across the...specified in this paragraph: (1) Onslow Beach Swing Bridge, mile 240.7, at...

2011-07-01

447

40 CFR 227.10 - Hazards to fishing, navigation, shorelines or beaches.  

Code of Federal Regulations, 2011 CFR

...to fishing, navigation, shorelines or beaches. 227.10 Section 227.10 Protection...to fishing, navigation, shorelines or beaches. (a) Wastes which may present...may present a hazard to shorelines or beaches may be dumped only at sites and...

2011-07-01

448

46 CFR 7.25 - Montauk Point, NY to Atlantic Beach, NY.  

Code of Federal Regulations, 2013 CFR

... false Montauk Point, NY to Atlantic Beach, NY. 7.25 Section 7.25 Shipping...7.25 Montauk Point, NY to Atlantic Beach, NY. (a) A line drawn from Shinnecock...the spit of land at the western end of Oak Beach. (d) A line drawn from Jones...

2013-10-01

449

Beach tar accumulation, transport mechanisms, and sources of variability at Coal Oil Point, California  

E-print Network

Beach tar accumulation, transport mechanisms, and sources of variability at Coal Oil Point). Among the most visible manifestations of marine oil in the environment is the formation and beach accumulation is common on many California beaches due to chronic oil emissions from natural oil seeps

Luyendyk, Bruce

450

33 CFR 167.501 - In the approaches to Los Angeles/Long Beach: Precautionary area.  

Code of Federal Regulations, 2011 CFR

...In the approaches to Los Angeles/Long Beach: Precautionary area. 167.501 Section...In the approaches to Los Angeles/Long Beach: Precautionary area. (a) The precautionary...area enclosed by the Los Angeles-Long Beach breakwater and a line connecting Point...

2011-07-01

451

33 CFR 334.990 - Long Beach Harbor, Calif.; naval restricted area.  

Code of Federal Regulations, 2012 CFR

...2012-07-01 2012-07-01 false Long Beach Harbor, Calif.; naval restricted area...RESTRICTED AREA REGULATIONS § 334.990 Long Beach Harbor, Calif.; naval restricted area...U.S. Naval Base Los Angeles, Long Beach, California, and such agencies as...

2012-07-01

452

33 CFR 110.100 - Los Angeles and Long Beach Harbors, Calif.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 false Los Angeles and Long Beach Harbors, Calif. 110.100 Section...Areas § 110.100 Los Angeles and Long Beach Harbors, Calif. (a) [Reserved...beginning. (c) Area B-1. Long Beach outer harbor along east side of Pier 400 beginning at latitude...

2011-07-01

453

33 CFR 167.501 - In the approaches to Los Angeles/Long Beach: Precautionary area.  

Code of Federal Regulations, 2012 CFR

...In the approaches to Los Angeles/Long Beach: Precautionary area. 167.501 Section...In the approaches to Los Angeles/Long Beach: Precautionary area. (a) The precautionary...area enclosed by the Los Angeles-Long Beach breakwater and a line connecting Point...

2012-07-01

454

33 CFR 334.990 - Long Beach Harbor, Calif.; naval restricted area.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 2011-07-01 false Long Beach Harbor, Calif.; naval restricted area...RESTRICTED AREA REGULATIONS § 334.990 Long Beach Harbor, Calif.; naval restricted area...U.S. Naval Base Los Angeles, Long Beach, California, and such agencies as...

2011-07-01

455

6/29/2006 BEACH 2006 July 2nd 8th  

E-print Network

6/29/2006 BEACH 2006 July 2nd ­ 8th 1 Leptonic decays of Charm mesons David H. Miller Purdue University (CLEO collaboration) 7th International Conference on Hyperons, Charm And Beauty Hadrons BEACH 2006 2nd to 8th July 2006 University of Lancaster, England. #12;6/29/2006 BEACH 2006 July 2nd ­ 8th 2

456

U. Akgun, Beach 2006, Lancaster 1 THE UNIVERSITY OF IOWATHE UNIVERSITY OF IOWA  

E-print Network

U. Akgun, Beach 2006, Lancaster 1 THE UNIVERSITY OF IOWATHE UNIVERSITY OF IOWA c + Lifetime Measurement from SELEX (E781) Experiment Ugur Akgun for the SELEX Collaboration #12;U. Akgun, Beach 2006. Akgun, Beach 2006, Lancaster 3 THE UNIVERSITY OF IOWATHE UNIVERSITY OF IOWA SELEX Experiment at Fermilab

Akgun, Ugur

457

33 CFR 167.501 - In the approaches to Los Angeles/Long Beach: Precautionary area.  

Code of Federal Regulations, 2013 CFR

...In the approaches to Los Angeles/Long Beach: Precautionary area. 167.501 Section...In the approaches to Los Angeles/Long Beach: Precautionary area. (a) The precautionary...area enclosed by the Los Angeles-Long Beach breakwater and a line connecting Point...

2013-07-01

458

For first time since 2007, food stamp use drops in state, Palm Beach County  

E-print Network

For first time since 2007, food stamp use drops in state, Palm Beach County March 13, 2013|By Donna in Palm Beach County fell in February, according to data from the Florida Department of Children from last year when the number of food stamp recipients in Palm Beach County jumped nearly 14 percent

Fernandez, Eduardo

459

33 CFR 80.160 - Montauk Point, NY to Atlantic Beach, NY.  

Code of Federal Regulations, 2011 CFR

... false Montauk Point, NY to Atlantic Beach, NY. 80.160 Section 80.160 ...160 Montauk Point, NY to Atlantic Beach, NY. (a) A line drawn from the...the spit of land at the western end of Oak Beach. (d) A line drawn from Jones...

2011-07-01

460

Calculation of beach change under interacting cross-shore and longshore processes Hans Hanson a,  

E-print Network

Calculation of beach change under interacting cross-shore and longshore processes Hans Hanson a online 7 March 2010 Keywords: Longshore sediment transport Beach response Groins Coastal structures approach and numerical model that simulates beach and dune change in response to cross-shore processes

US Army Corps of Engineers

461

The Beach Study: An Empirical Analysis of the Distribution of Coastal Property Values  

E-print Network

165 The Beach Study: An Empirical Analysis of the Distribution of Coastal Property Values empirical evidence suggests that coastal properties, and particularly those proximate to a beach, have empirical evidence suggests that coastal properties, and particularly those proximate to a beach, have

Omiecinski, Curtis

462

46 CFR 7.25 - Montauk Point, NY to Atlantic Beach, NY.  

Code of Federal Regulations, 2011 CFR

... false Montauk Point, NY to Atlantic Beach, NY. 7.25 Section 7.25 Shipping...7.25 Montauk Point, NY to Atlantic Beach, NY. (a) A line drawn from Shinnecock...the spit of land at the western end of Oak Beach. (d) A line drawn from Jones...

2011-10-01

463

Economic Impact of THE PLAYERS Championship Golf Tournament at Ponte Vedra Beach, Florida, March 20051  

E-print Network

FE698 Economic Impact of THE PLAYERS Championship Golf Tournament at Ponte Vedra Beach, Florida at the Sawgrass Stadium Golf course in Ponte Vedra Beach, Florida. This event is part of the PGA TOUR and is operated by PGA TOUR, Inc., which is also headquartered in Ponte Vedra Beach, Florida. In 2005, the TPC

Florida, University of

464

CEF06, Amathus Beach Hotel, Limassol, Cyprus, June 22-24, 2006  

E-print Network

CEF06, Amathus Beach Hotel, Limassol, Cyprus, June 22-24, 2006 Optimal Endogenous Carbon Taxes School of Management University of Massachusetts Amherst, Massachusetts 01003 #12;CEF06, Amathus Beach06, Amathus Beach Hotel, Limassol, Cyprus, June 22-24, 2006 · This research was supported, in part

Nagurney, Anna

465

33 CFR 100.106 - Freeport Grand Prix, Long Beach, NY.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 false Freeport Grand Prix, Long Beach, NY. 100.106 Section 100.106...100.106 Freeport Grand Prix, Long Beach, NY. (a) Regulated area. The...waters of Long Island to the south of Long Beach, New York. The regulated area is...

2011-07-01

466

Evidence of adaptation from ancestral variation in young populations of beach mice  

E-print Network

Evidence of adaptation from ancestral variation in young populations of beach mice Journal of adaptation from ancestral variation in young populations of beach mice Vera S. Domingues1,2,3 , Yu-Ping Poh1 receptor (Mc1r), a gene that contributes to pigmentation differences, in beach and mainland populations

467

Losing shuttle program to hurt Space Coast far worse than Palm Beach County  

E-print Network

Losing shuttle program to hurt Space Coast far worse than Palm Beach County By JEFF OSTROWSKI Palm Beach Post Staff Writer Updated: 5:07 p.m. Sunday, July 3, 2011 Posted: 4:59 p.m. Sunday, July 3, 2011 agency Space Florida. For many in Palm Beach County's aerospace industry, the shuttle's demise merits

Belogay, Eugene A.

468

33 CFR 110.214 - Los Angeles and Long Beach harbors, California.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 false Los Angeles and Long Beach harbors, California. 110.214 Section...Grounds § 110.214 Los Angeles and Long Beach harbors, California. (a) General...the Captain of the Port Los Angeles-Long Beach, the pilot stations for the Port of...

2013-07-01

469

36 CFR 3.17 - What regulations apply to swimming areas and beaches?  

Code of Federal Regulations, 2013 CFR

...regulations apply to swimming areas and beaches? 3.17 Section 3.17 Parks...regulations apply to swimming areas and beaches? (a) The superintendent may designate areas as swimming areas or swimming beaches in accordance with §§ 1.5 and...

2013-07-01

470

40 CFR 227.10 - Hazards to fishing, navigation, shorelines or beaches.  

Code of Federal Regulations, 2012 CFR

...to fishing, navigation, shorelines or beaches. 227.10 Section 227.10 Protection...to fishing, navigation, shorelines or beaches. (a) Wastes which may present...may present a hazard to shorelines or beaches may be dumped only at sites and...

2012-07-01

471

CONNECTIONS OF CARING: A STUDY OF SEATTLE AQUARIUM VOLUNTEER BEACH NATURALISTS  

E-print Network

CONNECTIONS OF CARING: A STUDY OF SEATTLE AQUARIUM VOLUNTEER BEACH NATURALISTS By DAOUD NEIL MILLER: A STUDY OF SEATTLE AQUARIUM VOLUNTEER BEACH NATURALISTS By DAOUD NEIL MILLER, Master of Arts in Counseling twelve long-term volunteer shoreline interpreters in the Seattle Aquarium Beach Naturalist program

Coble, Theresa G.

472

33 CFR 110.214 - Los Angeles and Long Beach harbors, California.  

Code of Federal Regulations, 2011 CFR

...2011-07-01 false Los Angeles and Long Beach harbors, California. 110.214 Section...Grounds § 110.214 Los Angeles and Long Beach harbors, California. (a) General...the Captain of the Port Los Angeles-Long Beach, the pilot stations for the Port of...

2011-07-01

473

Wave run-up on a high-energy dissipative beach Peter Ruggiero  

E-print Network

Wave run-up on a high-energy dissipative beach Peter Ruggiero Coastal and Marine Geology Program, U, Oregon State University, Corvallis, Oregon, USA R. A. Beach Consortium for Oceanographic Research in foreshore beach morphology, wave run-up data collected along the central Oregon coast during February 1996

474

33 CFR 334.990 - Long Beach Harbor, Calif.; naval restricted area.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 2013-07-01 false Long Beach Harbor, Calif.; naval restricted area...RESTRICTED AREA REGULATIONS § 334.990 Long Beach Harbor, Calif.; naval restricted area...U.S. Naval Base Los Angeles, Long Beach, California, and such agencies as...

2013-07-01

475

33 CFR 80.160 - Montauk Point, NY to Atlantic Beach, NY.  

Code of Federal Regulations, 2013 CFR

... false Montauk Point, NY to Atlantic Beach, NY. 80.160 Section 80.160 ...160 Montauk Point, NY to Atlantic Beach, NY. (a) A line drawn from the...the spit of land at the western end of Oak Beach. (d) A line drawn from Jones...

2013-07-01

476

33 CFR 117.821 - Atlantic Intracoastal Waterway, Albermarle Sound to Sunset Beach.  

Code of Federal Regulations, 2012 CFR

...Intracoastal Waterway, Albermarle Sound to Sunset Beach. 117.821 Section 117.821 Navigation...Intracoastal Waterway, Albermarle Sound to Sunset Beach. (a) The drawbridges across the...specified in this paragraph: (1) Onslow Beach Swing Bridge, mile 240.7, at...

2012-07-01

477

Coastal Dynamics 2013 MODELLING IMPACTS OF "JOHANNA SHORM" ON AN OPEN-BEACH WITH ECORS  

E-print Network

Coastal Dynamics 2013 1251 MODELLING IMPACTS OF "JOHANNA SHORM" ON AN OPEN-BEACH WITH ECORS and sedimentary dynamics processes on sandy beaches are not well understand. To better understand coastal) on Vougot Beach (Finist�re � France) using the SWAN-EPOC1DBeach modeling chain (still in development.) Dune

Brest, Université de

478

33 CFR 110.100 - Los Angeles and Long Beach Harbors, Calif.  

Code of Federal Regulations, 2012 CFR

...2012-07-01 false Los Angeles and Long Beach Harbors, Calif. 110.100 Section...Areas § 110.100 Los Angeles and Long Beach Harbors, Calif. (a) [Reserved...beginning. (c) Area B-1. Long Beach outer harbor along east side of Pier 400 beginning at latitude...

2012-07-01

479

33 CFR 110.100 - Los Angeles and Long Beach Harbors, Calif.  

Code of Federal Regulations, 2013 CFR

...2013-07-01 false Los Angeles and Long Beach Harbors, Calif. 110.100 Section...Areas § 110.100 Los Angeles and Long Beach Harbors, Calif. (a) [Reserved...beginning. (c) Area B-1. Long Beach outer harbor along east side of Pier 400 beginning at latitude...

2013-07-01

480

Geospatial analysis of vulnerable beach-foredune systems from decadal time series of lidar data  

E-print Network

Geospatial analysis of vulnerable beach-foredune systems from decadal time series of lidar data, Geospatial analysis of vulnerable beach- foredune systems from decadal time series of lidar data, Journal islands and their beach and dune systems. GIS- based per grid cell statistics and map algebra was applied

Mitasova, Helena