Journal of Shellfish Research articles from August 2008

Journal of Shellfish Research archives from August 2008

Establishing a baseline for management of the rock scallop, Spondylus calcifer (Carpenter 1857): growth and reproduction in the upper Gulf of California, Mexico.(Report)
August 1, 2008... ABSTRACT The rock scallop (also known as "donkey thorny oyster," "spiny oyster," and "thorny oyster"), Spondylus calcifer, is the largest member of any Panamic Province Spondylus and has played important economic, political, and cultural roles...

Modifications in microstructure of cultured and wild scallop shells (Pecten maximus).(Report)
August 1, 2008... ABSTRACT The aim of the present work was to compare microstructure in strong and weak scallop Pecten maximus shells of cultured and wild origin using observations from scanning electron microscopy (SEM) and atomic force microscopy (AFM). The...

Gonadal cycle of northern quahogs, Mercenaria Mercenaria (Linne, 1758), from fished and non-fished subpopulations in Narragansett Bay.(Report)
August 1, 2008... ABSTRACT To determine if population density in areas closed to fishing in Narragansett Bay is causing differences in the reproductive potential of the organisms, this study used two approaches to determine the reproductive condition of the...

Effects of the fishery on the northern quahog (=hard clam, Mercenaria mercenaria L.) population in Great South Bay, New York: a modeling study.(Report)
August 1, 2008... ABSTRACT A numerical bioenergetics simulation model based on the physiological processes affecting individual clams across a range of phenotypes describing a cohort has been developed and applied to the conditions in Great South Bay, New York....

Decadal trends in age structure and recruitment patterns of ocean quahogs Arctica islandica from the Mid-Atlantic bight in relation to water temperature.(Report)
August 1, 2008... ABSTRACT Ocean quahogs (Arctica islandica) are long-lived bivalves. Distribution patterns and biology of ocean quahogs in the Mid-Atlantic Bight (MAB) off the east coast of North America are directly related to bottom water temperatures. We...

Harvest history and current densities of the pearl oyster Pinctada mazatlanica (Bivalvia: pteriidae) in Las Perlas and Coiba Archipelagos, Panama.(Report)
August 1, 2008... ABSTRACT Four hundred years of commercial harvest of the oyster Pinctada mazatlanica in Pacific Panama were characterized by historical collapses and recoveries that finally ended in the 1940s; oyster populations have not recovered since then....

Larval quality of a nonnative bivalve species (European oyster, Ostrea edulis) off the east Canadian coast.(Report)
August 1, 2008... ABSTRACT A population of European oysters (Ostrea edulis) was recently discovered off the eastern coast of Canada. The occurrence of this newly established population led various aquaculture stakeholders to consider this species commercially....

Prospective culture of the Cortez oyster Crassostrea corteziensis from northwestern Mexico: growth, gametogenic activity, and condition index.(Report)
August 1, 2008... ABSTRACT This study examined growth, gametogenic activity, condition index, as well as the relationship of the life cycle to environmental parameters of the Cortez oyster Crassostrea corteziensis, which was cultured for 25 mo in the lagoon of...

Assessment of genetic diversity of the eastern oyster Crassostrea virginica in Veracruz, Mexico using microsatellite markers.(Report)
August 1, 2008... ABSTRACT Genetic variation was evaluated in populations of the eastern oyster Crassostrea virginica (Gmelin) from the coast of Veracruz, eastern Gulf of Mexico. We sampled six lagoons and analyzed variation at five microsatellite loci....

Long-term trends in oyster population dynamics in Delaware Bay: regime shifts and response to disease.(Report)
August 1, 2008... ABSTRACT We evaluate a 54-y survey time series for the Delaware Bay oyster beds in New Jersey waters to identify the characteristics of regime shifts in oyster populations and the influence of MSX and Dermo diseases on population stability....

A comparison of the macrofaunal communities inhabiting a Crassostrea virginica oyster reef and oyster aquaculture gear in Indian River Bay, Delaware.(Report)
August 1, 2008... ABSTRACT The eastern oyster (Crassostrea virginica) is a vital species in the estuaries of the mid-Atlantic United States. Whereas their filtering activity and biodeposition play an important role in the ecology of these systems, the reefs they...

Effects of triclosan on the oyster parasite, Perkinsus Marinus and its host, the eastern oyster, Crassostrea virginica.(Report)
August 1, 2008... ABSTRACT Because temperature plays an important role on progression and transmission of disease caused by Perkinsus marinus in the field, the effects of triclosan on the viability of P. marinus meronts (trophozoites) and oyster hemocytes were...

Recovery of a fish pathogenic bacterium, Aeromonas salmonicida, from ebonyshell mussels Fusconaia ebena using nondestructive sample collection procedures.(Report)
August 1, 2008... ABSTRACT Refugia are increasingly being used to maintain and propagate imperiled freshwater mussels for future population augmentations. Success for this endeavor is dependent on good husbandry, including a holistic program of resource health...

Indicator and other bacteria in striped Venus (Chamelea gallina, L.) and wedge clam (Donax trunculus) from the northern coast of the sea of Marmara, Turkey.(Report)
August 1, 2008... ABSTRACT Indicator and some pathogen bacteria were investigated in both samples of Chamelea gallina and Donax trunculus collected from the northern coast of the Sea of Marmara Sea, Tekirdag, Turkey. Studies were carried out monthly from...

In vitro and in vivo evaluation of quinine as a potential anti-protozoal for the eastern oyster parasite Perkinsus marinus.(Report)
August 1, 2008... ABSTRACT Perkinsus marinus is a lethal protozoan that impacts eastern oyster (Crassostrea virginica) populations along the eastern seaboard of the United States and the Gulf of Mexico. Despite the potential advantages of a chemical therapy to...

Prospect of oyster culture in Pakistan: pathology assessment of two commercially important oyster species.(Report)
August 1, 2008... ABSTRACT Nine different species of oysters belonging to the genera Crassostrea, Saccostrea, and Ostrea occur naturally along Pakistan's coastline in the northern Arabian Sea. At the present time, no commercial harvesting or hatchery culture of...

Genotypic diversity of culturable Vibrio species associated with the culture of oysters and clams in Galicia and screening of their pathogenic potential.(Report)
August 1, 2008... ABSTRACT The genotypic diversity of seventy-one Vibrio strains isolated from the culture of oysters and clams was analyzed by using ribotyping and sequencing of 16S rRNA gene. The combination of both techniques led to clustering, the separation...

Experimental manipulation of suspended culture socks: growth and behavior of juvenile mussels (Mytilus spp.).(Report)
August 1, 2008... ABSTRACT Suspended mussel culture entails loading high densities of juvenile mussels into mesh socks, and hanging them from floating longlines, often resulting in intraspecific crowding, reduced growth, and mussel yield. Despite this potential...

Genotype-dependent variability in somatic tissue and shell weights and its effect on meat yield in mixed species [Mytilus edulis L., M. trossulus (Gould), and their hybrids] cultured mussel populations.(Report)
August 1, 2008... ABSTRACT Meat yield, expressed as the ratio of somatic tissue weight (flesh or meat weight) to total weight, is extensively used in the Atlantic Canadian mussel culture industry as a measure of product quality and market suitability at harvest....

Physicochemical factors of abalone quality: a review.(Report)
August 1, 2008... ABSTRACT Abalone meat has long been held in high regard for its unique sensory properties of texture and flavor, as well as its appearance. From a physicochemical viewpoint, the concentrations of certain free amino acids (especially glycine and...

Survival, growth and recruitment of abalone Haliotis diversicolor in Sagami Bay, Japan.(Report)
August 1, 2008... ABSTRACT The occurrence of newly settled postlarvae (<500 [micro]m of shell length [SL]) and subsequent growth and survival of the abalone, Haliotis diversicolor, were observed from 2001-2004 at two stations in the rocky shore of Nagai on the...

A simulation study of abalone fertilization.(Report)
August 1, 2008... ABSTRACT A computer simulation was conducted to study the effects of densities, abundances, and aggregations of adult abalone populations on the fertilization success (amount of fertilization per spawning female). Impacts of densities were...

Analysis of the decline of the abalone fishery (Haliotis fulgens and H. corrugata) along the westcentral coast of the Baja California Peninsula, Mexico.(Report)
August 1, 2008... ABSTRACT We analyzed the decline in the abalone harvest of two species Haliotis fulgens and H. corrugata, from one region composed of six study zones along the Baja California peninsula, Mexico. Survey data from 1991 to 2001 were used and...

Applicability of stable isotope analyses for ecological studies of abalone: estimation of fractionation values and natural diets.(Report)
August 1, 2008... ABSTRACT Controlled feeding experiments with juvenile abalone Haliotis discus hannai were performed to evaluate the suitability of stable isotope analyses for diet inference. Juvenile abalone were divided into five size groups with distinct...

Seasonal variations in biochemical composition of Loligo forbesi (cephalopoda: loliginidae) in the Mediterranean Sea and the Gulf of Suez, Egypt.(Report)
August 1, 2008... ABSTRACT The aim of this work was to investigate the seasonal variability in the biochemical composition in both sexes of Loligoforbesi, (Streenstrup 1856) in two locations in Egypt: the Mediterranean Sea off the coasts of Alexandria and north...

Population assessment of the conch Strombus galeatus (gastropoda, strombidae) in Pacific Panama.(Report)
August 1, 2008... ABSTRACT Populations of Strombus galeatus Swainson 1823 have been severely overfished in Pacific Panama. In this study, we assessed the status of the S. galeatus population in Las Perlas and Coiba Archipelagos. Average densities per site were...

Fishing time and trap ghost fishing for Cancer johngarthi along the Baja California Peninsula's Southwestern Coast, Mexico.(Report)
August 1, 2008... ABSTRACT During trap-fishing investigations on the crab Cancer johngarthi along Baja California peninsula's southwestern coast, Baja California Sur, Mexico, conducted between 2002 and 2006, information was gathered to assess fishing efficiency...

Population structure of Dungeness crab (Cancer magister) in British Columbia.(Report)
August 1, 2008... ABSTRACT Population structure of Dungeness crab (Cancer magister) from British Columbia was evaluated from a survey of variation of eight microsatellite loci in eight populations. Genetic differentiation among the populations surveyed was...

Population assessment of the pacific green spiny lobster Panulirus gracilis in Pacific Panama.(Report)
August 1, 2008... ABSTRACT Populations of the green spiny lobster Panulirus gracilis (Streets 1871) have sustained increasing harvesting pressure in Pacific Panama for decades, but basic information about their biology and ecology in the region is scarce. This...

Discrimination of penaeid shrimps with PCR-RFLP analysis.(polymerase chain reaction restriction fragment length polymorphism)(Report)
August 1, 2008... ABSTRACT A rapid polymerase chain reaction restriction fragment length polymorphism (PCR-RFLP) analysis was designed to examine genetic differentiation of some penaeid shrimps. Three hundred and fifty-six bp of cytochrome-b gene, a specific...

Nursery-phase culture of green sea urchin Strongylocentrotus droebachiensis using "on-bottom" cages.(Report)
August 1, 2008... ABSTRACT Sea urchin hatchery techniques are well established, but cost effective grow-out strategies are still under development. Juvenile green sea urchins (Strongylocentrotus droebaehiensis) with a test diameter of less than 15 mm are...

Management methods for a sea urchin dive fishery with individual fishing zones.(Report)
August 1, 2008... ABSTRACT Management of the Nova Scotia sea urchin fishery includes several unusual features: one license per fishing zone, fishers increase resource yields over natural levels by controlling the sea urchin-macrophyte cycle, fishers scale...