Pilot Transplant Studies with the Introduced Asiatic Clam, Corbicula Fluminea, to Measure Methyl Mercury Accumulation in the Foodweb of the Sacramento-san Joaquin Delta Estuary
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Accumulation, depuration and risk assessment of cadmium (Cd) and lead (Pb) in clam (Corbicula fluminea) (O. F. Müller, 1774) under laboratory conditions
The present study investigated the accumulation and depuration of two heavy metals Cd and Pb in the freshwater clam (Corbicula fluminea) under laboratory conditions. Treated clams were exposed to single and combined treatments of Cd and Pb at the concentration of 5 mg L-1 and 10.5 mg L-1 for 10 days, respectively. The animals were then placed in metal free water for the following 5 days for de...
متن کاملFlotation of the Bivalve Corbicula fluminea as a Means of Dispersal.
Small specimens of the Asiatic bivalve Corbicula c.f. fluminea (Müller) secrete long mucous threads through their exhalent siphons that act as draglines to buoy the animal into a water column. These mucous strands, secreted in response to water current stimuli, are produced by dense accumulations of ctenidial mucocytes and may help in the downstream or interstream dispersal of this rapidly spre...
متن کاملComparison of Selenium bioaccumulation in the clams Corbicula fluminea and Potamocorbula amurensis: a bioenergetic modeling approach.
Selenium uptake from food (assimilation efficiency) and dissolved phase (influx rate) as well as loss kinetics (efflux rate) were compared between two bivalves, Corbicula fluminea and Potamocorbula amurensis. The effects of salinity and temperature on these kinetic parameters for both clam species also were evaluated. The Asiatic clam, C. fluminea, more efficiently assimilated Se associated wit...
متن کاملEffects of Salinity, Temperature and Food Type on the Uptake and Elimination Rates of Cd, Cr, and Zn in the Asiatic Clam Corbicula fluminea
− Laboratory radiotracer experiments were conducted to determine assimilation efficiencies (AE) from ingested algal food and oxic sediment particles, uptake rates from the dissolved phase, and the efflux rates of Cd, Cr and Zn in the Asiatic clam Corbicula fluminea. Among three elements, AE from both algal and sediment food was greatest for Cd, followed by Zn and Cr. The AEs of tested elements ...
متن کاملThe Future of Fish in Response to Large-Scale Change in the San Francisco Estuary, California
-The San Francisco Estuary is the largest estuary on the west coast of North America and one of the most altered . It supports a diverse fish fauna in which key species are in severe decline . The estuary is faced with catastrophic structural and ecological changes, especially in the Sacramento-San Joaquin Delta and Suisun Marsh, as the result of levee failure caused by the combination of earth...
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تاریخ انتشار 2002