敌百虫对水丝蚓的毒害  

The Poisoning of Metriphonate to Limnodilus hoffineisteri

作　　者：乔淑晶[1] 范学铭[1] 方芳[1] 陈凤虎[1] 陈辉[1] 

机构地区：[1]哈尔滨师范大学生命与环境科学学院生物学系,哈尔滨150080

出　　处：《动物学杂志》2006年第6期92-96,共5页Chinese Journal of Zoology

基　　金：黑龙江省自然科学基金资助项目(No.TC2005-18);黑龙江省教育厅自然科学基金资助项目(No.10541096)

摘　　要：采用急性毒性方法测定了被不同浓度敌百虫毒害的水丝蚓（Limnodilus hoffineisteri）半致死浓度（LC50），利用测定酶活性方法检测了水丝蚓超氧化物歧化酶（SOD）的变化及中毒后水丝蚓喂饲的强壮水螅（Hydra robusta）SOD的改变。（1）敌百虫对水丝蚓48h LC50为3．29mg／L。敌百虫对水丝蚓SOD活性影响显著（P〈0．05）：在低浓度1～4mg／L时，SOD活性呈上升趋势，但随浓度增加至5mg／L，SOD活性开始下降。（2）用1～8mg／L中毒后的水丝蚓依次喂饲水螅，SOD活性呈上升趋势。实验结果表明，敌百虫作为重要的杀虫剂或作为防治鱼病的药物，对水丝蚓造成胁迫，并在一定浓度范围内直接或间接地影响以其为食的动物的生存，以至危害生命。This article describes the poisoning of metriphonate to Limnodihts hoffineisteri. The LC50 of metriphonate to L. hoffineisteri was determined, and superoxide dismutase （SOD） changes in L. hoffineisteri and SOD changes in hydra feeding with poisoned L. hoffineisteri were measured. The LC50 of metriphonate to L. hoffineisteri was 3.29 mg/ L. The SOD activity in L. hoffineisteri was significantly affected by metriphonate（ P 〈 0.05 ）. Low concentration （1 -4 mg/L） of metriphonate increased SOD activity, while high concentration （5 mg/L） of metriphonate decreased SOD activity. When hydras were fed with L. hoffineisteri which had been poisoned in 1 - 8 mg/L metriphonate, SOD activity was increased. It is proved that metriphonate, an important insecticide or a drug which is used to prevent fish diseases, threatens the survival of L. hoffineisteri and affects the predators of L. hoffineisteri indirectly.

关 键 词：敌百虫 水丝蚓 强壮水螅 半致死浓度 超氧化物歧化酶 

分 类 号：X174[环境科学与工程—环境科学]