标题：The Influence of Tributyltin Chloride and Polychlorinated Biphenyls on Swimming Behavior, Body Growth, Reproduction, and Activity of Biotransformation Enzymes in Daphnia magna
摘要：Exposure to tributyltin chloride (TBT) at 7.1 μg L -1 or polychlorinated biphenyls (PCB) at 1.5 μg L -1 significantly affected Daphnia magna causing rapid decreases in mean swimming activity and a change in the preferred swimming depth. Lower exposure concentrations (0.1 μg L -1 TBT or 0.1 μg L -1 PCB) did not significantly alter swimming behavior. Exposure to medium and high TBT concentrations (0.1 μg L -1 and 7.1 μg L -1 ) caused a decrease in body growth and decreased the number of newborn daphnids. PCB exposure at 1.5 μg L -1 and 12 μg L -1 did not affect reproduction or body growth of the animals. The lowest exposure levels (0.1 μg L -1 PCB or 0.02 μg L -1 TBT) did not alter any behavioral or ecophysiological parameter of the daphnids. Exposure to PCB as high as 15 μg L -1 or TBT as high as 6.6 μg L -1 had no effect on daphnid glutathione-S-transferase and glutathione-peroxidase activity.
