Effects of cadmium on sediment processing on members of the Capitella species-complex

摘要

The effect of cadmium on sediment processing by laboratory cultured specimens of Capitella sp I and Capitella sp B was inves- tigated. Specimens were exposed to 0, 60, 90 and 140 μg Cd g~-1 dry weight sediment for a 10 day period (two census days) to observe effects of cadmium on their feeding activity. Under unstressed conditions, Capitella sp 1 I specimens were larger, had higher biomass and produced more fecal pellets than Capitella sp B. Cadmium concentrations had no effect on pellet production and body mass of the studied populations.