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1 材料和方法1.1 试验动物瓣鳃纲代表动物—背角无齿蚌(Anodonta woodiana)；平均体重300克。1.2 试验药品“鱼用速杀特”，主要成份为2.5％溴氰菊酯，由荆州市恒发水产药业有限公司提供。1.3 试验条件试验在室外池塘进行。试验期间水温变化范围为22.5～28.5℃，试验水pH 6.8～
1 Materials and methods 1.1 Experimental Animal flap gill on behalf of animals - anodonta woodiana (Anodonta woodiana); average body weight of 300 grams. 1.2 Test drugs “fish kill special”, the main component of 2.5% deltamethrin, Jingzhou City by the Hang Fat Fisheries Pharmaceutical Co., Ltd. to provide. 1.3 Test conditions Test in an outdoor pond. Water temperature during the test ranged from 22.5 to 28.5 ℃, pH 6.8 ~