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Showing 1 to 20 of 31 for “"Eastern oyster"”.
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Investigating the Response of the Eastern Oyster (Crassostrea virginica) to Low Dissolved Oxygen Conditions
<p>The Eastern oyster <em>(Crassostrea virginica)</em> requires dissolved oxygen (DO) of about 4 mg/L to support proper physiological function. Hypoxia and/or microxia occur when DO decreases to ≤ 2 mg/L. Salinity and temperature changes resulting from large-scale freshwater influx have been …
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Predation On The Eastern Oyster Crassostrea Virginica On Intertidal Reefs Affected By Recreational Boating
… a keystone species and ecosystem engineer, the eastern oyster Crassostrea virginica plays a vital role in estuarine environments. Complex, three-dimensional oyster reefs act as havens for biodiversity and contribute to ecological processes. Recently, concern for this resource has arisen in …
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Native And Invasive Competitors Of The Eastern Oyster Crassostrea Virginica In Mosquito Lagoon, Florida
… about the sources of juvenile and adult oyster mortality must be answered. Potential causes of Crassostrea virginica mortality in the Indian River Lagoon system include sediment loads, competition, predation, and disease. My research focused on the interactions between oysters and the …
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Modeling Food Assemblage Dynamics in Western Mississippi Sound Regarding Eastern Oyster (Crassostrea virginica) Larval Performance
… Mississippi Sound is home to historical eastern oyster reefs that serve as an economically important yet decimated environmental habitat for coastal Mississippi (Pace et al. 2020, Pruett et al., 2024). Previous studies speculate upon the potential of food particle size as a food …
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CHEMICAL INDUCTION OF SETTLEMENT IN LARVAE OF THE EASTERN OYSTER <italic>CRASSOSTREA VIRGINICA </italic> (GMELIN)
… capable of inducing settlement behavior in the eastern oyster <italic>Crassostrea virginica</italic>. In this study, I treated competent <italic>C. virginica</italic> larvae with select chemicals to identify those which are capable of inducing settlement behavior at an average salinity of 9.6 …
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ESTIMATION OF QUANTITATIVE GENETIC PARAMETERS OF THE EASTERN OYSTER (CRASSOSTREA VIRGINICA) IN THE GULF OF MEXICO
<p>The decline of natural oyster reefs in Gulf of Mexico (Gulf) states has stimulated the development of aquaculture to support the industry and restoration programs. Gulf habitats feature diverse salinity environments that may require oysters bred for habitat-specific optimal genetic …
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Modeling Environmental Effects on MSX Prevalence and Intensity in Eastern Oyster (<i>Crassostrea virginica</i>) Populations
<p>An oyster population model coupled with a model for Haplosporidium nelsoni, the causative agent of the oyster disease MSX, was used with salinity time-series constructed from Delaware River flow measurements to study environmentally-induced variations in the annual cycle of this disease. …
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GENETIC PARAMETERS FOR HEAT AND SALINITY STRESS TOLERANCE IN NORTHERN GULF OF MEXICO EASTERN OYSTER, CRASSOSTREA VIRGINICA
<p>Summer mortalities in Gulf of Mexico eastern oysters have been linked to excessively high temperatures, and chronic exposure to low salinity. In this study, the feasibility of improving tolerance to these two stresses by selection was evaluated in common garden experiments employing a pool of …
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Developing cultivated mollusks through establishing primary cell culture methods of Eastern Oyster, Crassostrea virginica, as a model bivalve
… established so far. This study used the adult Eastern Oyster, Crassostrea virginica, as a model bivalve to study the decontamination, cell dissociation, and culture conditions suited for mollusk adductor muscle cells. Oyster adductor (OAD) cells were obtained via tissue explant, mechanical and …
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Detection of Giardia lamblia and Cryptosporidium parvum in the eastern oyster (Crassostrea virginica) harvested from the Great Bay Estuary
… caused by the consumption of raw or undercooked oysters in which the protozoan pathogens, Giardia lamblia and Cryptosporidium parvum are present. The development of a rapid and sensitive technique to detect infectious protozoa in oysters is a necessity.</p><p>Immunofluorescence has been employed …
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The Effects of Environmental Variability on the Population Structure of the Eastern Oyster (<i>Crassostrea virginica</i>): A Modeling Study
… conditions on the population structure of the Eastern oyster, Crassostrea virginica. The first model, a time-dependent model of the oyster population as described in Powell et al. (1992) and Hofmann et al. (1992, 1995), tracks the distribution, development, spawning, and mortality of sessile …
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EXAMINING THE GENETIC BASIS AND PHYSIOLOGY OF SURVIVAL IN EXTREME LOW SALINITY TO IMPROVE AQUACULTURE OF THE EASTERN OYSTER Crassostrea virginica
The eastern oyster, Crassostrea virginica, is an important aquaculture species and supports a growing industry along the east coast of the United States. However, increases in freshwater from storm events and intentional diversions can expose coastal aquaculture operations to extreme low salinity …
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Examining the Effects of Food Supply on Eastern Oyster (Crassostrea virginica) Larval Performance and Settlement Potential in Delaware Bay and Mississippi Sound
<p>Oyster population maintenance and growth require sufficient larval stocks capable of timely development, growth, and successful metamorphosis, whereby larval performance and settlement potential determines the capacity for a larval cohort to effectively establish into an existing population. …
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Modeling the Dispersion of Eastern Oyster Larvae (<i>Crassostrea virginica</i>) and its Effects on the Movement of Disease Resistant Genes in the Delaware Bay Estuary
… determine the spatial distribution of oyster larvae in Delaware Bay? What is the role of larval dispersion in the transference of disease-resistant genes? The particle-tracking module in the Regional Ocean Modeling System (ROMS) was converted into an Individual-Based model representing …
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Early Recruitment of <i>Crassostrea virginica</i> to Restored and Natural Oyster Reefs in the Western Mississippi Sound: Larval Supply and Post-Settlement Success
<p>The eastern oyster (C. virginica) is a foundation species that improves water quality, protects shorelines, provides refuge for other organisms, and contributes to commercial fisheries. Successful early recruitment of eastern oyster is vital for resupplying adult populations in the face of …
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A population dynamic model assessing options for managing eastern oysters (Crassostrea virginica) and triploid Suminoe oysters (Crassostrea ariakensis) in Chesapeake Bay
… on the probability of extirpation of local eastern oyster (Crassostrea virginica) populations in the Chesapeake Bay. Management strategies include varying the minimum shell length-at-harvest, harvest rate, and rate and frequency of stocking of oyster seed with respect to varying salinities …
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Understanding the role of Stylochus ellipticus as a predator of Crassostrea virginica in Chesapeake Bay tributaries
… component of the unsuccessful restoration of the Eastern Oyster (Crassostrea virginica), a former keystone species in Chesapeake Bay. Here, I examine the polyclad flatworm Stylochus ellipticus and its potential role as an important predator of C. virginica. Using small-fragment size C. virginica …
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Seasonal gonadal changes of adult oviparous oysters in Tomales Bay
<p>Two species of oviparous oysters, Crassostrea virginica (Gmelin, 1790), the Eastern oyster, and Crassostrea gigas (Thunbert, 1793), the Japanese oyster, were introduced into Tomales Bay, California, for commercial purposes. Because these oysters do not propagate in Tomales Bay, new shipments of …
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Studies of the host-microbe relationship in aquaculture-raised animals
… important aquaculture-raised species is the Eastern oyster. This animal is critical for the ecological health of the Chesapeake Bay, and it is also an important source of revenue. A significant portion of the revenue flow is the harvest and sale of live oysters for consumption. Unfortunately, …
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