The eastern oyster, Crassostrea virginica, accumulates metals in proportion to its surrounding environment. Oysters have not been systematically analyzed for metals in LIS for over 20 years. This study examines the following hypotheses: (1) oysters harvested from harbors with contaminated sediment will have higher tissue metal concentrations and (2) oysters harvested from western Connecticut will have higher tissue metal concentrations compared to oysters harvested from eastern Connecticut. Thirteen commercial, conditional and/or recreational oyster beds were sampled along the Connecticut coast from Norwalk to New London representing a variety of sediment and estuarine environments. Results of this study showed no direct correlation between sediment metal concentrations and oyster tissue metal concentrations. The lack of a clear trend indicates that sediment metals are not the sole source of metals accumulated by oysters. Oyster tissue copper and zinc concentrations were inversely related to the salinity of the surrounding water.
|School:||Southern Connecticut State University|
|School Location:||United States -- Connecticut|
|Source:||MAI 49/03M, Masters Abstracts International|
|Subjects:||Biological oceanography, Environmental science, Aquatic sciences|
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