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The Toxic Effects of Cd~(2+) on Macrobrachium nipponnensis

ZHANG Ya-juan et al(College of Science,Hebei University,Baoding,Hebei 071002)  
[Objective]The aim was to study the toxic effects of Cd2+ on the Macrobrachium nipponnensis.[Method]The 24 h,48 h,and 96 h median lethal concentrations were measured by the acute toxicity test method.The acute stress test was used on the variant concentrations(0、0.007 9、0.010、0.013、0.016、0.020 mg/L)of Cd2+ and the SOD,GPT,GOT were investigated.[Result]The results showed that the 24 h,48 h and 96 h LC50 of Cd2+ were 0.038 mg/L,0.022 mg/L and 0.019 mg/L at the temperature of 24 ℃.The activities of SOD,GPT and GOT were inhibited in several concentration gradient stress of Cd2+ and the inhibition was more obvious with the increased concentration of Cd2+.[Conclusion] Cd2+ had strong toxic effects on the Macrobrachium nipponnensis.
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