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Experimental Study on Acute Toxicity of Avermectin on the Ietalurus punetaus

Jian Hejun;Zhaoqing Aquatic Technologies Popolarizing Center;  
The main aim of this study was to demonstrate the actue toxic effects of avermection for Ietalurus punetaus. In this study,we analysised the death rate and toxicity reaction by biological toxicity test within 96 hours. The results showed that the median lethal concentration of avermectin on Ietalurus punetaus within 96h was 9.869×10-3mg/L,95% confidence interval range was 9.629~10.103×10-3mg/L,the safe concentration was 2.754×10-3mg/L. These results indicate that avermectin is highly toxic drugs on Ietalurus punetaus. It should be used with caution in Ietalurus punetaus farming.
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