敌百虫和伊维菌素对近邻剑水蚤的急性毒性  

The acute toxicity of dipterex and ivermectin on Cyclops vicinus

作　　者：邢跃楠[1] 王诗跃 

机构地区：[1]沈阳农业大学畜牧兽医学院,辽宁沈阳110866

出　　处：《现代畜牧兽医》2014年第3期41-43,共3页Modern Journal of Animal Husbandry and Veterinary Medicine

摘　　要：鱼苗孵化用水经常会滋生桡足类,严重影响育苗的成活率。本文通过水生生物急性毒性试验方法,研究敌百虫和伊维菌素对淡水常见桡足类近邻剑水蚤(Cyclops vicinus)的急性毒性。根据预试验的结果,敌百虫浓度梯度设置为0.3、0.6、1.2、2.4、4.8 mg/L,伊维菌素浓度梯度设置为0.01、0.04、0.16、0.64、2.56μg/L。每个浓度组设置3个平行,每个平行放10只桡足类,试验在20℃光照培养箱中进行。结果表明,敌百虫对桡足类的24 h LC50和48h LC50分别为1.862、1.183 mg/L,而伊维菌素对桡足类的24 h LC50和48 h LC50分别为0.404μg/L、0.164 4μg/L。伊维菌素的毒性远远大于敌百虫,生产上选用伊维菌素效果更好。与此同时,敌百虫和伊维菌素对桡足类的安全浓度分别为0.143 2 mg/L、0.008 16μg/L,可以为生物监测环境农药污染提供重要依据。The survival rate of fish larvae was heavily influenced by the copepoda in hatching water. The acute toxicity of dipterex and ivermectin on Cyclops vicinus which is one of the most common copepoda species in fresh water were studied at the temperature of 20 ℃ in illumination in-cubator. According to the trial test the concentration gradient of dipterex and ivermectin were built by 0.3,0.6,1.2、,2.4,4.8 mg/L and 0.01,0.04,0.16,0.64,2.56 ug/L. 3 repetitions were set in each concentration group and 10 Cyclops vicinus were arranged in each repetition. The results showed that the LC50 for 24 h and 48 h of dipterex were 1.862 mg/L and 1.183 mg/L. The LC50 for 24 h and 48 h of ivermectin were 0.404 μg/L and 0.164 4 μg/L. The toxicity of ivermectin was much more greater than that of dipterex to Cyclops vicinus. The safety concentration of dipterex and ivermectin were 0.143 2 mg/L and 0.008 16 μg/L which provide important data for the biological monitoring in the environmental pollution by pesticide.

关 键 词：敌百虫 伊维菌素 近邻剑水蚤 急性毒性 安全浓度 

分 类 号：S942.92[农业科学—水产养殖]