Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Effect of Cadmium Body Burdens in Adult 'Crassostrea virginica' on Fecundity and Viability of Larvae.
Author Zaroogian, G. E. ; Morrison, G. ;
CORP Author Environmental Research Lab., Narragansett, RI.
Year Published 1981
Report Number ERLN-194 ;EPA-600/J-81-119;
Stock Number PB82-223850
Additional Subjects Cadmium ; Oysters ; Toxicology ; Metals ; Larvae ; Concentration(Composition) ; Reproduction(Biology) ; Salinity ; Temperature ; Shellfish ; Reprints ; Heavy metals ; Crassostrea virginica
Library Call Number Additional Info Location Last
NTIS  PB82-223850 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 7p
Adult oysters (Crassostrea virginica) were treated for a minimum of 33 weeks with ambient (control), 5, and 15 micrograms Cd/kg seawater at ambient salinity and temperature. After the oysters were induced to spawn, all possible cross-fertilizations between treatments were obtained by mixing the appropriate sperm suspension with the selected egg-seawater treatments. Despite cadmium concentrations as high as 270 micrograms Cd/kg dry weight in the total soft parts, oysters spawned heavily. A minimum of 93% of the embryos resulting from control parents developed into normal larvae when incubated in ambient seawater. As much as 29% of the embryos from control parents failed to develop, or developed into abnormal larvae upon incubation in 15 micrograms Cd/kg seawater. Twenty-four percent of the embryos resulting from the parents treated with seawater containing 15 micrograms Cd/kg developed into abnormal larvae when incubated in seawater containing 15 micrograms Cd/kg. Under the conditions of this study, it appears that seawater containing 15 micrograms/kg of cadmium has a greater impact on embryonic development than on gametogenisis.