Comparative toxicity of mercury and cadmium to thejuvenile freshwater snail, Filopaludina martensi martensi

摘要

The toxicity bioassay of the juvenile freshwater snail, Filopaludina (Siamopaludina) martensi martensiexposed to mercury and cadmium was studied. The median lethal concentrations of mercury were lower than those ofcadmium after 24, 48, 72, and 96 h of exposure. In metal bioaccumulation experiments, the mean residual concentrationsof mercury and cadmium in the treated snail and the treatment water were assessed. However, more cadmium was foundaccumulated in its tissues.