Abstract
The accumulation of cadmium and selenium and their mutual interaction was measured in hepatopancreas, gills, chela muscle, and carapace in six groups of shore crabs Carcinus maenas (L.), exposed to combinations of cadmium and selenite concentrations in the sea water. The highest concentrations of cadmium occurred in gills and hepatopancreas; muscle and carapace accumulated cadmium to lower levels. The cadmium concentrations in hepatopancreas varied inversely with the cadmium concentrations in muscle and carapace. The cadmium concentrations in muscle and carapace varied in parallel. The presence of selenite in the sea water augmented the concentrations of cadmium in the gills. When selenite was added to the sea water the selenium level rose in gills and carapace, while no increase was observed in hepatopancreas and muscle. The presence of cadmium in the sea water augmented the accumulation of selenium in the gills. In the presence of cadmium in the sea water selenium wa; accumulated in gills and carapace in proportion to the ambient selenite concentration. Exposing crabs 10 selenile and cadmium resulted in a positive correlation between the concentration of these elements in the gills and hepatopancreas. Furthermore, a positive correlation was found between the selenium and cadmium concentrations in carapace within each experimental group. The data are discassed as regards mode of uptake, internal translocations, accumulation, me'abolism, and excretion of the elements investigated.
Published Version
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