Toxic Effects of Mercury on Marine Benthic Scapharca subcrenata and Mytilus edulis
Acute and chronic toxic effects of mercury on Scapharca subcrenata and Mytilus edulis, typical coastal benthic bivalves of China, were studied. For the two bivalve groups, No Observed Effect Concentration (NOECs) of mercury were determined separately based on the three metrics of organisms being exposed, i. e., the weights, lengths and superoxide dismutase (SOD) activity. Non-detection toxic concentration and half lethal concentration were also obtained in this study. The results showed that except some test phases, there was no significant difference between intra-class variance and inter-class variance for SOD activity (P＞ 0.05). For the weight and length, the significant difference between intra-class variance and inter-class variance were also not observed (P＞ 0. 1).Therefore, the length and weight cannot be used to evaluate the toxic effects at the end point. For Scapharca subcrenata and Mytilus edulis, non-detection toxic concentrations of mercury were 23.7 μg·L-1 and 87.8 μg·L-1, and half lethal concentrations for them were 683.4 μg·L-1 and 773.2 μg·L-1, respectively.
NETL
NSTL
万方数据
维普
