Journal of Shellfish Research articles from August 2004

Journal of Shellfish Research archives from August 2004

Antimicrobial activity of copper and zinc accumulated in eastern oyster amebocytes.
August 1, 2004... ABSTRACT The distribution of eastern oysters Crassostrea virginica near terrestrial watersheds has led to a general impression that low or variable salinity is imperative for survival. However, freshwater runoff contains numerous mineral...

Relationship of amebocytes and terrestrial elements to adult shell deposition in eastern oysters.
August 1, 2004... ABSTRACT Freshwater runoff contains terrestrial elements from geologic deposits that may be vital to survival of eastern oysters Crassostrea virginica, a factor that could account for their distribution near terrestrial watersheds. Some of...

Quarantine of oyster shell cultch reduces the abundance of Perkinsus marinus.
August 1, 2004... ABSTRACT Oyster shell is the preferred substrate for replanting oyster beds and restoring oyster reefs. If pathogens remain viable in tissues attached to shell, then planting shell may inadvertently serve as a vector for pathogen transmission....

Effects of salinity on growth and survival of silver-lip pearl oyster, Pinctada maxima, spat.
August 1, 2004... ABSTRACT Juvenile silver-lip pearl oysters, Pinctada maxima Jameson, were held over a period of 20 days in the following salinities: 45, 40, 34 (ambient), 30. and 25 parts per thousand ([per thousand]). There were no significant differences in...

Widespread null alleles and poor cross-species amplification of microsatellite DNA loci cloned from the Pacific oyster, Crassostrea gigas.
August 1, 2004... ABSTRACT Non-amplifying, PCR-null alleles are detected at 49 (51%) of 96 microsatellite DNA markers tested for Mendelian segregation in three families of the Pacific oyster Crassostrea gigas Thunberg. The average frequency of null alleles among...

A comparison of dredge and patent tongs for estimation of oyster populations.
August 1, 2004... ABSTRACT Exploited oyster stocks on public grounds in Virginia waters are subject to regular surveys effected using a traditional oyster dredge and, more recently, patent tongs. Dredges provide semiquantitative data, have been used with...

Decadal scale changes in seasonal patterns of oyster recruitment in the Virginia sub estuaries of the Chesapeake Bay.
August 1, 2004... ABSTRACT Reproductive periodicity of sessile estuarine invertebrates reflects local seasonality of environmental (temperature, salinity) and biologic (food) parameters. Estuaries are ephemeral features in geologic time but considered somewhat...

Gametogenic processes in the pearl oyster, Pteria penguin (Roding, 1798) (Bivalvia, Mollusca).
August 1, 2004... ABSTRACT The aim of the study is to reveal the gametogenic cycle in the pearl oyster, Pteria penguin. The specimens were collected from Si-chang Island (Thailand) from January 2000 to January 2001. Gametogenesis was observed in histological...

Microscopic observations of larval Ostrea circumpicta (bivalve: ostreidae) in brood chambers.
August 1, 2004... ABSTRACT This study is the first report of the microscopic features of larvae and gonads of Ostrea circumpicta collected in Jeju, Korea. Female oysters brooded larvae at the early veliger stage (115-135 [micro]m) in the infrabranchial chamber....

Herpes-like virus associated with eroded gills of the Pacific oyster Crassostrea gigas in Mexico.
August 1, 2004... ABSTRACT Since 1997, high mortality episodes of cultured oysters have occurred in Bahia Falsa, Mexico. Studies on the possible association of these mortalities with pathogens have showed some similar characteristics to those found in the...

Sand elimination by the Asiatic hard clam Meretrix meretrix (L.): influences of temperature, salinity and season.
August 1, 2004... ABSTRACT Clams, being filter-feeders that burrow into sand, tend to accumulate sand in their body tissues. Depuration reduces the clams' gut contents and eliminates sand from different body fractions, providing some cleansing and ensuring that...

Surfclam histopathology survey along the Delmarva mortality line.
August 1, 2004... ABSTRACT The 2002 National Marine Fisheries Service Northeast Fisheries Science Center (NMFS-NEFSC) survey revealed a substantial reduction in the abundance of surf clams, Spisula solidissima, off the Delmarva Peninsula. Increased mortality...

Reproductive cycle of the stout razor clam, Tagelus plebeius (Lightfoot, 1786), in the Mar Chiquita Coastal Lagoon, Argentina.
August 1, 2004... ABSTRACT A population of the dioecious euryhaline bivalve, Tagelus plebeius, living in the Mar Chiquita Lagoon (37[degrees]40'S, 57[degrees]26'W) exhibits an annual gonad cycle. Spawning occurs during the austral spring and summer (October to...

Regeneration time and morphology of the inhalant siphon of Donax denticulatus Linnaeus, 1758 (Bivalvia, Donacidae) after amputation.
August 1, 2004... ABSTRACT To study the process of regeneration and its effect on the morphology of the inhalant siphon of a tellineacean bivalve, Donax denticulatus, individuals were artificially amputated and placed in aquaria under laboratory conditions, in...

Field and laboratory observations of the mass mortality of the yellow clam Mesodesma mactroides in South America: the case of Isla del Jabali, Argentina.
August 1, 2004... ABSTRACT Since the mid-1990s, the yellow clam Mesodesma maetroides (Deshayes, 1854) has experienced mass mortalities throughout its biogeographic range (23 [degrees]S to 41[degrees]S) along Atlantic exposed sandy beaches of South America....

Impact of green crab (Carcinus maenas L.) predation on a population of soft-shell clams (Mya arenaria L.) in the Southern Gulf of St. Lawrence.
August 1, 2004... ABSTRACT A caging experiment was carried out on an estuarine mudflat in Pomquet Harbour, Nova Scotia, Canada from late Mayto early September 2001. Six replicate 0.83 [m.sup.2] cages were set up for each of the following treatments: low predator...

In situ aquaculture protocol for two tropical Pectinids, Bractechlamys vexillum (Reeve 1853) and Mimachlamys gloriosa (Reeve 1853): spat collection, rearing, growth and mortality.
August 1, 2004... ABSTRACT The aim of this study is to propose an in site aquaculture protocol, including spat collecting and rearing, for two tropical species of Pectinids (Bractechlamys vexillum and Mimachlamys gloriosa). Spat were collected using small mesh...

Effect of depth and stocking density on growth and retrieval of the postlarval lion's paw scallop, Nodipecten nodosus (Linnaeus, 1758).
August 1, 2004... ABSTRACT Coastal areas of southern Brazil are experiencing an intense development of bivalve farming, and the lion's paw scallop, Nodipecten nodosus (Linnaeus, 1758), is a promising aquaculture species. An important but poorly understood...

Comparison of biochemical composition and muscle hypertrophy associated with the reproductive cycle of diploid and triploid scallops, Argopecten ventricosus.
August 1, 2004... ABSTRACT Triploid organisms have a limited capacity to develop gonads, and thus are considered sterile or partially sterile. The objective of this study is to compare triploid and diploid organisms of the same age, and grown under similar...

AFLP linkage map of an intraspecific cross in Chlamys farreri.(scallops; amplified fragment length polymorphism)
August 1, 2004... ABSTRACT Zhikong scallop, Chlamys farreri, is the most important species for sea-scallop breeding programs in China. The linkage maps of C. farreri were constructed with AFLP markets generated from 21 primer combinations. The polymorphism level...

Hybridization effects of three populations of Chlamys farreri from China, Korea and Japan.
August 1, 2004... ABSTRACT Populations of Chlamys farreri are distributed along the coasts of the northern seacoast of China, the Korean Peninsula and the Pacific seacoast, Japan. These populations represent potentially different genetic resources in their...

Lipid classes and fatty acid composition in female gonads of great scallops--a selective field study.
August 1, 2004... ABSTRACT Fatty acid composition was analyzed in neutral lipids (NL), phosphatidyletanolamine (PE) and phosphatidylcholine (PC) of Pecten maximus (L.) ovaries from Western Norway. Individual ovaries were selected based on macroscopic...

Reproductive cycle of coexisting mussels, Mytilus californianus and Mytilus galloprovincialis, in Baja California, New Mexico.
August 1, 2004... ABSTRACT The bay mussel, Mytilus galloprovincialis, and the California mussel, Mytilus californianus, are sympatric species in the Pacific coast of Baja California in northwest Mexico. To determine the reproductive cycle of both species in a...

Temporal variation in the settlement of blue mussels (Mytilus edulis C. Linnaeus, 1758 and M. trossulus Gould 1850) in Eastern Maine.
August 1, 2004... ABSTRACT Blue mussels in the genus Mytilus are cultured extensively in the Northeastern United States and throughout much of Atlantic Canada. Recent reports suggest that of the two species that co-occur in this region, the economic value of...

Localized synchronous spawning of Mytilus californianus conrad in Barkley Sound, British Columbia, Canada.
August 1, 2004... ABSTRACT Although Mytilus californianus is a dominant intertidal species along most exposed rocky shores of the northwest coast of North America and has been studied extensively, no direct observations of spawning by this species in the field...

Mini-review: distribution of the Mediterranean mussel Mytilus galloprovincialis (Bivalvia: Mytilidae) and hybrids in the Northeast Pacific.
August 1, 2004... ABSTRACT The non native Mediterranean mussel Mytilus galloprovincialis is broadly established in the northeast Pacific. Until recently, the coast north of Humboldt Bay, California, USA, was not considered a major zone of sympatry and...

Variations in density, shell-size and growth with shore height and wave exposure of the rocky intertidal snail, Calyptraea spirata (Forbes, 1852), in the tropical Mexican Pacific.
August 1, 2004... ABSTRACT This study evaluates the density, shell-size, and growth of the intertidal snail, Calyptraea spirata (Forbes 1852), in the beach of Teopa of Bahia Chamela, Jalisco, located in the tropical Mexican Pacific. The snail is one of the most...

Size specific fecundity of red abalone (Haliotis rufescens): evidence for reproductive senescence?
August 1, 2004... ABSTRACT The fecundity of wild red abalone. Haliotis rufescens, was examined during four reproductive seasons (2000-2003) in northern California. A broad size range of abalone were sampled (n = 425) from Van Damme State Park and the Point Arena...

The settlement of abalone (Haliotis discus hannai ino) larvae on culture layers of different diatoms.
August 1, 2004... ABSTRACT An innovative method was developed to quantitatively measure the attractiveness of cultured diatoms for early stages of abalone larvae settlement. Larvae of the abalone Haliotis discus hannai were offered, in a petri dish, a choice of...

Lethal levels of dissolved oxygen for Haliotis diversicolor supertexta at different salinity levels.
August 1, 2004... ABSTRACT The abalone Haliotis diversicolor supertexta juveniles (shell length 3.51 [+ or -] 1.10 cm) were exposed to different concentrations of dissolved oxygen (DO) using the static renewal method at different salinity levels of 25 [per...

Population characteristics and co-occurrence of three exploited decapods (Panulirus argus, P. guttatus and Mithrax spinosissimus) in Bocas del Toro, Panama.
August 1, 2004... ABSTRACT Spiny lobster populations within the Bocas del Toro archipelago appear to be overexploited. Extensive visual surveys over a wide area of reef habitat down to 20 m in depth indicate mean lobster abundance, sizes, and percent maturity...

The relationship between seaweed diet and purple ink production in Aplysia dactylomela rang, 1828 (gastropoda: opisthobranchia) from Northeastern Brazil.
August 1, 2004... ABSTRACT Aplysia dactylomela is a large marine opisthobranch gastropod, which inhabits shallow tropical shoreline regions, eats red and green algae, and releases a purple ink when disturbed. Many functions have been proposed for this secretion...

Nucleic acid derived indices or instantaneous growth rate as tools to determine different nutritional condition in cuttlefish (Sepia officinalis, Linnaeus 1758) hatchlings.
August 1, 2004... ABSTRACT Two groups of 100 cuttlefish hatchlings each were used to determine the duration of the yolk reserves, during which growth can be obtained with no food supply. One group was fed live grass shrimp ad libitum from the 3rd day of life...

Study on heritability of growth in the juvenile sea urchin Strongylocentrotus nudus.
August 1, 2004... ABSTRACT The heritability of growth of juvenile Strongylocentrotus nudus was analyzed using quantitative genetic methods. Twenty-one half-sib groups and 60 to 63 full-sib groups of juveniles were obtained by artificial fertilization of three to...

A set of tests for the phenotypic identification of culturable bacteria associated with Galician bivalve mollusc production.
August 1, 2004... ABSTRACT To select a set of biochemical tests that provide a rapid identification of culturable bacteria associated with Galician bivalve molluscs cultures, the phenotypic diversity of some bacterial species was investigated. A total of 488...

Some aspects of modelling scallop (pecten maximus, L.) dredge efficiency and special reference to dredges with depressor plate (English Channel, France).
August 1, 2004... ABSTRACT To estimate the abundance of scallop populations either by VPA approach or by directed survey on seabeds it is necessary to evaluate the efficiency of fishing gears. The age-size structure of commercial or experimental catches does not...

Enrichment of tetranucleotide microsatellite loci from invertebrate species.
August 1, 2004... ABSTRACT An experimental procedure using biotin labelled probes and streptavidin bound magnetic beads was developed to produce microsatellite-enriched libraries in two bivalve species, geoduck and Japanese scallop, and one crustacean, Dungeness...