Effect of heavy metals on the survival and feeding behaviour of the sandy shore scavenging gastropod Nassarius festivus(Powys)

摘要

The effects of Cu, Cd, Zn and Cr on the survival and feeding behaviour of the sandy shore scavenging gastropod Nassarius festivus were compared. The 96-h LC_50 for Cu, Cd, Zn and Cr were 0.36, 1.52,1.76 and 36.9 mg l~-1, respectively. Four sublethal concentrations of each metals plus a control were prepared and the snails were exposed to experimental solutions for 96 h. Feeding behaviour was studied after the snails were starved for five days. As compared with the control, the number of individuals feeding was significantly reduced by exposure to 0.05 mg l~-1 Cu, 0.2 mg l~1 Zn, 0.5 mg l~-1 Cr.