... 0213 Effect of Increasing Salinity on Weight-Specific Filtration Rate of Juvenile Scallop Argopecten purpuratus Reared at ... a...
NBII National Biological Information Infrastructure
... Riquelme. 2001. Bacteria in the culture of the scallop Argopecten purpuratus (Lamarck, 1819). Aqua. Int. 9:285�303. CrossRefKeen, ... and the energy budget of the juvenile Chilean scallops, Argopecten pu...
... energy from adductor muscle for gametogenesis of the scallop, Argopecten purpuratus Lamarck. J. Mollusc. Stud. 17:113�116. Mohite, ... ...
... the hydrogen atom, and it possesses a nonzero angular momentum or nuclear spin, which creates a magnetic dipole ... ...
... cell viability (Orgel & Crick 1980). According to this theory, larger cells can simply tolerate more DNA (Gregory 2000). An ... ...
... and survival of larvae and juveniles of the scallop Argopecten purpuratus L. J. Exp. Mar. Biol. Ecol 292:93� ... ...
V. cholerae D(sub 10) value in scallops (Argopecten purpuratus) was determined in vivo. D(sub 10) was found to be 0,143 kGy, requiring therefore the application of 8D in scallops, equivalent to a 1,14 kGy dose, the optimal dose for life span extension of ...
National Technical Information Service (NTIS)
... However, other triploid bivalves, like the Japanese oyster (Crassostrea gigas) and the pearl oyster (Pinctada fucata), showed a ... 1990, Komaru & Wada 1994). In the Japanese oyster Crassostrea gigas, spe...
Mature individuals of Argopecten purpuratus from suspended culture in Tongoy Bay, northern Chile were conditioned at two temperatures (16 and 20 degrees C) and three different diets (mixture of pure microalgae, microalgae supplemented with lipids and microalgae supplemented with carbohydrates). The food, equivalent to 3% daily of the animal dry weight was ...
PubMed
Although some external coloration and pigmentation patterns in molluscan shells may be attributable to environmental factors, most variation in these phenotypic characters depends on uncomplicated genetic mechanisms. Genetic research on inheritance of color variations in the north-Chilean scallop (Argopecten purpuratus) has now been expanded to analyze ...
A bacteriological study was carried out in a hatchery of Argopecten purpuratus located in northern Chile which had been affected by severe larval mortalities. The phenotypic characterization of the bacterial strains revealed that Vibrio alginolyticus was the predominant species isolated in the majority of samples taken from the different units of the ...
Mass mortalities of larval cultures of Chilean scallop Argopecten purpuratus have repeatedly occurred in northern Chile, characterized by larval agglutination and accumulation in the bottom of rearing tanks. The exopolysaccharide slime (EPS) producing CAM2 strain was isolated as the primary organism from moribund larvae in a pathogenic outbreak occurring ...
Few studies have described the molecular response of mollusk larvae to heavy metal exposure. We investigated the response of Chilean scallop Argopecten purpuratus post-larvae to copper exposure under experimental conditions. Post-larvae were maintained with and without copper stress in tanks containing netlon collectors with biofilms that were formed by ...
Seasonality, amplitude, and magnitude of spawning events were determined for Argopecten purpuratus in the La Rinconada marine reserve, Antofagasta, Chile, between December 1995 and January 2004. During the same period, samples of scallop larvae were obtained in vertical plankton hauls recovered within this reserve in an area routinely exposed to circular, ...
Levels of prostaglandins E(2) and F(2alpha) were measured in male and female gonadal portions of the functional hermaphroditic scallop Argopecten purpuratus, at the time of spawning. For these measurements, mature scallops were stimulated to initiate their chain of spawning events, and prostaglandins (PGs) were analyzed in samples before stimulation, when ...
Antimicrobial peptides (AMP) have been widely described in several organisms from different kingdoms. We recently designed and evaluated a synthetic version of an AMP isolated and characterized from Argopecten purpuratus hemocytes. This study describes the generation of a chimaeric gene encoding for Ap-S, the use of this construct to transform E. coli ...
Larvae of the Chilean-Peruvian scallop Argopecten purpuratus were fed a Dunaliella tertiolecta diet (Dun-diet) supplemented with lipid emulsions, rich in 20:5n-3 (EmEPA), 22:6n-3 (EmDHA) or in saturated fatty acids (EmCOCO). A mixed algal diet of Isochrysis galbana (T-iso) and Chaetoceros neogracile served as a positive control (St-diet). Lipid ...
Semimytilus algosus is a small mussel species that fouls artificial culture systems of the scallop Argopecten purpuratus (Lamarck, 1819) in the north of Chile. Since biofouling organisms are a serious problem in culture, competing with the scallops for food and oxygen, environmentally-friendly methods are required to mitigate the effects of this fouling in ...
A bacterial copper-resistant strain was isolated from a hatchery-conditioned adult of the scallop Argopecten purpuratus and was identified as Vibrio sp. according to its physiological characteristics. The lowest concentration of Cu2+ required for its complete inhibition in VNSS medium was 50 microg ml(-1). The Vibrio strain was found to accumulate copper, ...
... two localities in Chile: El Abanico, Bio Bio (Region VIII), and Vegas del Flaco, Cordillera de San Fernando, ... and Costa, 1992a, 1992b). Paratypes CHILE: Bio-Bio [Region VIII: Biobio]: El Abanico, [3...
Analyses of radiocarbon content in Peruvian pre-bomb mollusk shells revealed short-term changes in vertical mixing and permit calculation of a new regional reservoir effect correction (?R) that includes variable confidence intervals to reflect sample time averaging. The rationale of the molluscan proxy is based on the mixing of radiocarbon-depleted deep water with comparatively enriched surface ...
NASA Astrophysics Data System (ADS)
... 3).Frente armada con agudos salientes sobre los ojos o cerca a los ocelos (figs. 30, 31, ... de abanico que alcanzan el margen inferior del ojo (fig. 40); pecíolo sumamente largo, similar en longitud ......
... early, fossil platyrrhine (New World �monkey�) Chilecebus carrascoensis (Flynn et al., 1995), we explore methods for estimating ... carrascoensis from the Abanico Formation of central Chile (Flynn et al.,...
... the Cachapoal Valley, Andean Main Range, ChileJOHN J. FLYNN and ANDR� R. WYSS Abstract The Abanico (= Coya- ... Paleocene (Itaboraian SALMA, early Paleocene) of Brazil (see Flynn and Wyss, 1998 for summary...
Interannual environmental variability in Peru is dominated by the El Ni�o Southern Oscillation (ENSO). The most dramatic changes are associated with the warm El Ni�o (EN) phase (opposite the cold La Ni�a phase), which disrupts the normal coastal upwelling and affects the dynamics of many coastal marine and terrestrial resources. This study presents a trophic model for Sechura Bay, located at ...
The tunicate Pyura chilensis (Molina, 1782); Phylum Chordata; Subphylum Urochordata; Class Ascidiacea, common local name "piure" or sea squirt; a filter-feeder (plankton and suspended particles) sessile species; may play an important role in monitoring domoic acid (DA) the principal toxic component of Amnesic Shellfish Poisoning (ASP). Significant DA concentrations have been determined in tunicate ...
Underway current velocity profiles were measured along a pair of transects during a period of 48 hours in an equatorward facing bay with the objective of characterizing the impact of circulation in bay aquaculture activities. The bay is Tongoy, located in north-central Chile (30� 15�S, 71� 35�W) and oriented northward. The bay entrance is oriented in the east-west direction and its width ...
Copper is an essential element, required for normal growth by all plants and animals; and a regular constituent in the environment (Lewis and Cave 1982; Lewis 1994). This heavy metal is an essential micronutrient that at higher concentrations can be deleterious to algae and other aquatic biota (Chang and Sibley 1993). Copper toxicity to algae depends upon the individual species, their ...
Energy Citations Database
Numerous studies have investigated the reproduction mechanisms in mollusc species at a biochemical and physiological level; few have described these mechanisms at a molecular level, despite great commercial interest in several mollusc species. We investigated genes involved in gonad maturation of the marine scallop Argopecten purpuratus. A cDNA library was ...
INUNDACIONES REPENTINAS EN VENEZUELA En diciembre de 1999, lluvias torrenciales generaron miles de Venezuela. Entre el 2 y el 3 de diciembre, se registraron 200 mil�metros (8 pulgadas) de lluvia, y a los, Colorado; N�poles, Italia y Vargas, Venezuela. En escalas de tiempo que abarcan miles de a�os, los abanicos
E-print Network
The method measures the toxicity of effluents and receiving water to the gametes of a sea urchin, Strongylocentrotus purpuratus, during a 1 h sperm exposure and a subsequent 20 min exposure period following the addition of eggs for measuring the fertilizi...
The dissociation supernatant (DS) isolated by disaggregating Strongylocentrotus purpuratus blastulae in calcium- and magnesium-free seawater specifically promotes reaggregation of S. purpuratus blastula cells. The purpose of this study was to use scanning...
This method measures the toxicity of effluents and receiving water to the gametes of a sea urchin, Strongylocentrotus purpuratus, during a 1 h sperm exposure and a subsequent 20 min exposure period following the addition of eggs for measuring the fertilizing capacity of the sperm...
EPA Science Inventory
, Lasmigona complanata, Plethobasus cyphyus, Potamilus purpuratus, Tritogonia verrucosa, and Truncilla
Bay scallops (Argopecten irradians) inhabit shallow subtidal habitats along the Atlantic coast of the United States and require settlement substrates, such as submerged aquatic vegetation (SAV), for their early juvenile stages. The short lifespan of bay scallops (1-2 yr) coupled...
The present study was designed to measure the effects of whole drilling mud and two of its major particulate components (barite and lignosulfonate) on the shell movements and swimming responses of the bay scallop, Argopecten irradians....
Poster presentation at a scientific meeting. A survey of Lagoon Pond, Martha's Vineyard, MA, USA was conducted in September 2005 to determine the combination of habitat factors most highly correlated with the bay scallop Argopecten irradians) abundance. A stratified random samp...
Platform Presentation at a Scientific Meeting. A survey of Lagoon Pond, Martha's Vineyard, MA, USA was conducted in September 2005 to determine the combination of habitat factors most highly correlated with bay scallop (Argopecten irradians) abundance. A stratified random samplin...
Scientists have begun to unravel the genome -- the chemical instructions for life contained in an organism's every cell -- for the purple sea urchin, Strongylocentrotus purpuratus.
NSDL National Science Digital Library
Photo of purple sea urchins used in study. Above: The purple sea urchin, Strongelocentrotus purpuratus, is a widely used model for studying the biology of ...
NASA Website
... scallop's adductor muscle (Cruz & Ibarra 1997) and thermal shock by raising water temperature from 18°C to ... ...
During the annual reproductive cycle in the echinoid, Strongylocentrotus purpuratus (Stimpson) two major seasonal events in oogenesis have been demonstrated by several different quantitative methods. Both seasonal changes in size and frequency distributio...
In central Oregon intertidal populations, the echinoid Strongylocentrotus purpuratus (Stimpson) first begins to produce mature gametes at a diameter of 25 mm during the second year of its life. The ratio of gonad to body size reaches its maximum in animal...
The bay scallop, Argopecten irradians, regulates its respiratory activity over a wide range of DO concentrations at temperatures of 17 degrees C to 22 degrees C (Van Dam 1954). orthern bay scallops, however, are physiologically active at temperatures below 17 degrees C (Bricel] e...
Adults of the bay scallop Argopecten irradians were held in flowing seawater containing 5 or 10 micrograms Cu/kg at ambient temperature and salinity. After eight weeks, scallops contained up to 91 and 310 micrograms Cu/g dry weight, respectively, in the total soft parts....
Eight microsatellite markers have been characterized from the Perumytilus purpuratus genome. Their gene diversity ranged from 0.057 to 0.873 and significant interpopulation genic heterogeneity was observed between two populations of southeastern Pacific (Chile) and southwestern Atlantic (Argentine). Distinct cross-priming amplification rates were recovered on nine additional ...
... 44::115�123. CrossRef, CSAHedgecock, D. 1994. Does variance in reproductive success limit effective population size of marine organisms?. Pp. 122�134 in A. Beaumont, ed. Genetics ... ...
The use of echinoderms for toxicity testing has focused primarily on sea urchins and sand dollars (Strongylocentrotus purpuratus, Arbacia punctulata, Lytechinus pictus, and Dendraster excentricus, for example). The status and relative sensitivity of vario...
The use of echinoderms for toxicity testing has focused primarily on sea urchins and sand dollars (Strongylocentrolus purpuratus, Arbacia punctulata, Lytechinus pictus, and Dendraster excentricus, for example). he status and relative sensitivity of various test methods are descri...
Indirect immunofluorescence was used to localize specific extracellular components in embryos of the sea urchin Lytechinus pictus. Hyalin and S2 (a group of components found in the disaggregation supernatant from Strongylocentrotus purpuratus blastulae) w...
... of the holotype of Triforis purpuratus Pilsbry, 1895. Translator�s Notes In citing dates, Kuroda usually gives ... the species he discusses, but not for others. Translator�s comments and interpolations ...
... gel at 4°C for 20 min, a hexagonal pattern of 2-mm diameter wells was arranged ... prepared according to Fuchs & Sela (1979). Immuno-adsorbents packed in the column were prepared by cross-linking ... ...
... algae). Sea Urchins The historical field sheets noted visual estimates of abundance of urchins (urchins were ... (O. F. Müller 1776). Purple sea urchins, S. purpuratus (Stimpson 1857) were sometimes ....
We report the sequence and analysis of the 814-megabase genome of the sea urchin Strongylocentrotus purpuratus, a model for developmental and systems biology. The sequencing strategy combined whole-genome shotgun and bacterial artificial chromosome (BAC) sequences. This use of BAC clones, aided by a pooling strategy, overcame difficulties associated with high heterozygosity of ...
PubMed Central
... and Marelli & Arnold (2001) studied morphological and genetic differences between Florida's Gulf of Mexico bay scallop subpopulations. They suggested that the morphological differences ... ...
... Road, Zhanjiang, Guangdong 524025, China2 Zhanjiang Silver Wave Pearl Company, 40 Jiefangdong Road, Zhanjiang, Guangdong 524000, China * Corresponding author. E-mail: ... ...
... events pertaining to gamete development is obtained by histological techniques (Couturier & Newkirk 1991). In the present study, quantitative ( ... B. J. Keller, and C. S. Smith. 2004. Histological techniq...
Within the last twenty years total harvests of bay scallops (Argopecten irradians) have dwindled in the southern New England Region, and one of the reasons often cited for this decline is drastic changes to their habitat, specifically eelgrass. To counteract these declines, bay ...
... 1999, Santamaria et al. 1999, Department of Primary Industries, Water & Environment 2004). In the eastern Pacific, the exploitation of ... Panamá. Tecnociencia 5:35�49. Department of Primary Industries Wa...
A survey of Lagoon Pond, Martha�s Vineyard, MA, USA was conducted in September 2005 to determine the combination of habitat factors most highly correlated with bay scallop (Argopecten irradians) abundance....
