Abstract:

The author of this article adopted an acute toxicity method to mensurate the semi-lethal concentration (LC50) of Limnodilus claparedianus that were disposed in Cu2+ with different concentrations. The variation of L. claparedianus SOD activity toxic was tested by means of enzyme activity in this paper. The results showed that the semi-lethal concentration (LC50) of 48 hours was 8.640 ul/L. Cu2+ had a significant effect on L. hoffmeisteri SOD activity (P＜0.05). The SOD activity in the animal specimen increased when they were disposed in low concentration Cu2+ (0.500ul/L～5.340 ul/L). But SOD activity in the animal specimen decreased at different levels when concentrations of Cu2+ increased to 11.740ul/L, a conclusion was achieved that Cu2+ could cause coercion to L. claparedianus and even cause death of animal individuals, and they could also lead to direct and indirect influence on aquatic ecosystems and the subspecies which were fed by L. claparedianus.