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Trace Metals In Eastern Oyster Crassostrea Virginica Tissues In Resource Waters New Hanover County North Carolina
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Book Synopsis Trace Metals in Eastern Oyster (Crassostrea Virginica) Tissues in Resource Waters, New Hanover County, North Carolina by : Savannah Baird Sherard
Download or read book Trace Metals in Eastern Oyster (Crassostrea Virginica) Tissues in Resource Waters, New Hanover County, North Carolina written by Savannah Baird Sherard and published by . This book was released on 2012 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Trace Metals in Oysters in Resource Waters in Southeastern North Carolina by : Lauren Elizabeth Kipp
Download or read book Trace Metals in Oysters in Resource Waters in Southeastern North Carolina written by Lauren Elizabeth Kipp and published by . This book was released on 2012 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Trace Metal Bioavailability in Southeastern United States Estuaries by : Peter B. Jenkins
Download or read book Trace Metal Bioavailability in Southeastern United States Estuaries written by Peter B. Jenkins and published by . This book was released on 2001 with total page 646 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Prevalence of Disease, Tissue Abnormalities and Tissue Metal Contents in Eastern Oysters (crassostrea Virginica) from Connecticut's Long Island Sound Coastline by : Gabriel Neil Geist
Download or read book Prevalence of Disease, Tissue Abnormalities and Tissue Metal Contents in Eastern Oysters (crassostrea Virginica) from Connecticut's Long Island Sound Coastline written by Gabriel Neil Geist and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Spatial Trends in Eastern Oyster (Crassostrea Virginica) Tissue Metal Concentrations in Long Island Sound by : David Oshana
Download or read book Spatial Trends in Eastern Oyster (Crassostrea Virginica) Tissue Metal Concentrations in Long Island Sound written by David Oshana and published by . This book was released on 2010 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of GenX Exposure on the Eastern Oyster, Crassostrea Virginica by : Melissa N. Lenentine
Download or read book Effects of GenX Exposure on the Eastern Oyster, Crassostrea Virginica written by Melissa N. Lenentine and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Heavy Metals in Oysters from Virginia Since Tropical Storm Agnes by : Robert James Huggett
Download or read book Heavy Metals in Oysters from Virginia Since Tropical Storm Agnes written by Robert James Huggett and published by . This book was released on 1973 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rainfall from tropical storm Agnes caused the salinity of the major estuaries entering the Chesapeake Bay to be drastically lowered. Bottom sediments normally subjected to 10 to 15 salinities were under fresh water. Heavy metals, pesticides and other pollutants adsorbed to these bottom sediments were undoubtedly mobilized. These once "stored" concentrations were augmented by the massive amounts of erosional products which created a high pollution potential. in shellfish in the Chesapeake Bay. For this reason the Virginia Institute of Marine Science asked for and received financial assistance from the Food and Drug Administration to assess the changes in heavy metal concentrations in the eastern oyster, (Crassostrea virginica) as a result of Agnes.
Book Synopsis Trace Analysis of Heavy Metals in the American Oyster by : Kenneth W. Roy
Download or read book Trace Analysis of Heavy Metals in the American Oyster written by Kenneth W. Roy and published by . This book was released on 1979 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Recruitment and Growth of the Eastern Oyster, Crassostrea Virginica in North Carolina by : Sonia Ortega
Download or read book Recruitment and Growth of the Eastern Oyster, Crassostrea Virginica in North Carolina written by Sonia Ortega and published by . This book was released on 1991 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Analysis of Heavy Metals in the American Oyster, Crassostrea Virginica, from Four Sites in the Tampa Bay Region by : Wayne Carl Magley
Download or read book An Analysis of Heavy Metals in the American Oyster, Crassostrea Virginica, from Four Sites in the Tampa Bay Region written by Wayne Carl Magley and published by . This book was released on 1978 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cellular Responses of Eastern Oysters, Crassostrea Virginica, to Titanium Dioxide Nanoparticles by : Brian Daniel Johnson
Download or read book Cellular Responses of Eastern Oysters, Crassostrea Virginica, to Titanium Dioxide Nanoparticles written by Brian Daniel Johnson and published by . This book was released on 2013 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: Because of the continued development and production of a variety of nanomaterials and nanoparticles, their uptake and effects on the biota of marine ecosystems is a concern. In estuarine environments, where these nanomaterials are likely to accumulate, agglomeration rates, interaction with organics, and response to UV radiation are critical in determining the extent of their biological impact. Bivalve molluscs are filter feeders and are highly adapted to internalize nano and micro-sized particles through endocytosis. Because of their filtering abilities and abundance they are commonly used as indicator species for marine contamination. In this study adult eastern oysters, Crassostrea virginica, were exposed to a range of titanium dioxide nanoparticle (Ti02-NP) concentrations (5, 50, 500, and 5000 pg/L) in conjunction with natural UV radiation. In addition, isolated hepatopancreas, gill, and mantle tissues were isolated and exposed to the same Ti02-NP concentrations under similar UV conditions. Analysis of particle size using dynamic light scattering (DLS) reveled agglomeration rates increased with an increase in concentration. Concentration had a significant impact on agglomeration rates, which was in agreement with the dose dependent decrease in lysosomal stability in both the adult oysters as well as in the isolated tissue. Isolated tissues showed accumulation of titanium mainly in the hepatopancreas, which demonstrated a direct correlation to lysosomal stability. Measurements of lipid peroxidation (LPx) as an indicator of oxidative stress did not support the hypothesis that an increase in toxicity will result from exposure to UV radiation. It did however show decreased LPx in the gill and mantle tissue of the adult oysters, suggesting a possible increase in antioxidants in response to the TiC2-NPs. Generally, this study illustrates the possibility of low concentrations of TiO2-NPS to demonstrate sublethal toxicity on oysters, which might be enhanced due to UV radiation.
Book Synopsis Effects of Stock Origin on the Growth and Survival of the Eastern Oyster, Crassostrea Virginica, in Southeastern North Carolina by : Sarah E. Smeilus
Download or read book Effects of Stock Origin on the Growth and Survival of the Eastern Oyster, Crassostrea Virginica, in Southeastern North Carolina written by Sarah E. Smeilus and published by . This book was released on 2006 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Tissue Distribution of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) in the Adult Eastern Oyster (Crassostrea Virginica Gmelin) and Its Effect on Egg and Larval Survival by : Margy Lee Wintermyer
Download or read book Tissue Distribution of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) in the Adult Eastern Oyster (Crassostrea Virginica Gmelin) and Its Effect on Egg and Larval Survival written by Margy Lee Wintermyer and published by . This book was released on 1998 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nitrogen Accumulation in Eastern Oysters (Crassostrea Virginica) Varies Significantly Across the Delaware Inland Bays by : Alexandra Stote
Download or read book Nitrogen Accumulation in Eastern Oysters (Crassostrea Virginica) Varies Significantly Across the Delaware Inland Bays written by Alexandra Stote and published by . This book was released on 2019 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bivalve aquaculture is increasingly being considered as a viable bioremediation strategy in eutrophied estuaries. Bivalves provide a variety of ecosystem services, including water filtration and nutrient removal from the water column. Filtration rates vary according to species and location-specific hydrological conditions. To explore the potential benefits of using eastern oyster (Crassostrea virginica) aquaculture as part of a nutrient trading plan, I examined nitrogen (N) accumulation across the Delaware Inland Bays, a series of small estuaries on the Mid-Atlantic coast. Two different size classes of oysters were deployed in multiple locations to monitor N content across space and N accumulation rate according to size. I found that N content varied with location but not with size class. N content in oyster tissue (% DW) was similar to previous findings for C. virginica, but content in shell (% DW) was up to an order of magnitude greater. My results confirm that N accumulation varies depending on location and suggests that N content within the shell may be higher than previously reported. My attempts to quantify the nutrient bioassimilation services that oyster aquaculture provides could be used to help inform future nutrient management plans in the Delaware Inland Bays.
Book Synopsis Hydrocarbon Levels in the Annapolis Roads Area of the Chesapeake Bay as Determined Through Analysis of Whole Body and Gill Tissues of the American Oyster (Crassostrea Virginica) by : Walter Irving Hatch
Download or read book Hydrocarbon Levels in the Annapolis Roads Area of the Chesapeake Bay as Determined Through Analysis of Whole Body and Gill Tissues of the American Oyster (Crassostrea Virginica) written by Walter Irving Hatch and published by . This book was released on 1982 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Immune Response of the Eastern Oyster Crassostrea Virginica by : Heidi Rachel Williams
Download or read book The Immune Response of the Eastern Oyster Crassostrea Virginica written by Heidi Rachel Williams and published by . This book was released on 2008 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Eastern oyster, Crassostrea virginica, is constantly exposed to microorganisms and pollutants in the surrounding environment. While cadmium (Cd) has been shown to alter specific immune defense mechanisms, the direct effect of Cd on the inactivation and degradation of bacteria in this animal is unknown. Furthermore, the roles of individual tissues in the distribution, inactivation and degradation of live bacteria introduced into the host remain unclear. First, we determined the effect of Cd on the immune responses of C. virginica at the organismal, cellular and molecular level. Following a chronic Cd exposure, oysters were injected in the adductor muscle with 105 live Vibrio campbellii. Quantitative real-time polymerase chain reaction (Q-PCR) was used to quantify the number of intact bacteria, while selective plating was used to quantify the number of injected bacteria that remained culturable within the tissues and fluids of the whole animal at 10, 30 and 60 min after injection. While Cd did not alter the oyster's ability to inactivate bacteria, Cd exposure induced a significant decrease in the numbers of circulating hemocytes and significant changes in the expression of selected genes as determined by microarray analysis. The gills, digestive gland and hemocytes mounted unique responses to chronic Cd exposure, yet the functional integrity of immune defense at the organismal level was maintained under these conditions. Second, we determined the relative contribution of individual tissues to the antibacterial response of C. virginica following injections of V. campbellii. Numbers of intact bacteria were used to identify sites of bacterial accumulation, while percentages of culturable bacteria were quantified to determine sites of bacteriostasis within the digestive gland, mantle, gills, adductor, gonadal tissues, labial palps and hemolymph at 10, 30, 60 and 120 min after injection. The gonadal tissues contained the greatest concentration of intact bacteria and the lowest percentage of culturable V. campbellii compared to all other tissues. We suggest that the gonadal tissues, when present, are the main site of bacterial accumulation and bacteriostasis. Overall, this study demonstrates the resilience of oysters to bacterial infections by their ability to inactivate bacteria.
Book Synopsis Eastern Oyster, Crassostrea Virginica by : Denise Cormier Méthé
Download or read book Eastern Oyster, Crassostrea Virginica written by Denise Cormier Méthé and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In the early 1990s, the introduction of suspended culture methods and the development of a market for cocktail oysters (65-75 mm) propelled the oyster aquaculture industry in New Brunswick forward, now producing over 140,000,000 oysters (337,000 floating bags) on 2,649 hectares of private shellfish leases. Recently, the industry has been threatened by an oyster disease outbreak, known as MSX in the Bras D'Or Lakes region (Nova Scotia). The possibility of the MSX parasite spreading into New Brunswick waters, as well as an increasing number of aquatic invasive species in the area, is a real concern for the industry and has prompted an investigation on possible mitigation strategies. The benefits of incorporating an upriver site into the production cycle of oyster aquaculture operations were evaluated. Seed (~ 26 mm shell height) and adult (~ 66 mm shell height) oysters were taken from downriver (salinity ~ 20-30‰) aquaculture sites and transferred upriver (salinity ~ 5-20‰) and monitored for shell and meat growth (May-October). At the same time, the impact of the relay fishery (harvest of oyster in closed marginally contaminated areas for relay to tenures in open areas) on oyster productivity was evaluated; wild upriver oysters were transferred downriver and monitored. Productivity data revealed that seed transferred upriver grew and survived as well as seed that remained downriver, while the mortality rates of adult oysters were lower at the upriver site. Meat content was unaffected in adult oysters transferred upriver. However, adult oysters transferred upriver had a gain in shell height (least squares means ± standard error) over the oysters that remained downriver (2.7 ± 0.5 mm vs. 1.8 ± 0.5 mm) and, in shell width (Median [95% CI]; 2.8 mm [1.9, 3.6] vs. 1.0 mm [0.3, 1.2]). Final organic meat content were approximately 35% less in adult oysters transferred downriver compared to those that remained upriver, confirming anecdotal reports from fishers of the relay fishery. Stress response of adult oysters was also assessed (80 and 150 days post transfer). Stress response measured revealed that regardless of their origin (upriver, downriver), oysters maintained upriver showed high levels of lysosomal destabilization and tissue atrophy. By contrast, the transfer downriver had the opposite effect, i.e. low lysosomal destabilization and low tubule atrophy. Results suggest that there exists no association between productivity parameters and the level of stress response measured by the biomarkers. The field investigation prompted further exploration on the impact of hemolymph fluid osmolality on neutral red retention assay (NRA) outcome. The prescribed saline solution for the assay assumes animals are isosmotic to surrounding water; however oysters sampled were hyperosmotic. Hemolymph osmolality was manipulated under laboratory conditions by subjecting adult oysters to temperature (0, 5, 10, 15, 20oC) and salinity (6, 27‰) regimes. At 10-20oC, oysters remained isosmotic to ambient waters, while hyperosmotic at 0-5oC. When mimicking spring freshets (salinity 6‰), hyperosmotic condition was observed in all temperature groups, and was inversely proportional to temperature. Monitoring of valve activity confirmed a restricted exchange at 6‰ salinity (e.g. spring freshet). With these laboratory results, use of filtered hemolymph fluid (NRAMOD) is recommended instead of the prescribed standard solution (standard NRA) adjusted to ambient seawater.
