18种常用渔药对双色鳗鲡玻璃鳗的急性毒性

Acute Toxicities of 18 Aquaculture Drugs on Glass Eels of Anguilla bicolor bicolor

在水温26～28℃条件下,采用静水试验法研究溴氯海因、三氯异氰尿酸、甲苯咪唑、敌百虫、硫酸铜等18种常用渔药对双色鳗鲡玻璃鳗的急性毒性。结果显示:双色鳗鲡玻璃鳗对三黄散、季铵盐络合碘、溴氯海因的安全浓度分别为15.25、2.01、1.00mg·L-1,生产实际常用剂量均低于安全浓度;对甲醛、戊二醛、三氯异氰脲酸、敌百虫、甲苯咪唑和欧指耐受能力中度,生产实际常用剂量高于安全浓度,应控制使用剂量和方法;双色鳗鲡玻璃鳗对原虫清、指环净、特效指环净、聚维酮碘、硫酸新霉素、白点净、小瓜敌杀高度敏感,应避免使用。

The acute toxicities of 18 drugs commonly applied for aquaculture purposes,including bromo-chloro-dimethyl,tri-chloroisocyanuric acid,Mebendazole,trichlorfon,Cupri Sulfas,et al.on the glass eels of Anguilla bicolor bicolor were studied at the water temperature between 26℃ and 28℃.The results showed that the safe concentration of Sanhuang San,quaternary ammonium salt iodine complex and bromo-chloro-dimethyl were 15.25,2.01 and 1.00 mg·L-1,respectively.Normally,the concentrations applied on fish were lower than these safety limits.However,since the glass eels were modestly sensitive to fomaldehyde,glutaraldehyde,tri-chloroisocyanuric acid,trichlorfon,Mebendazole and Ouzhitemie,and their application concentrations were generally higher than the safety threshold,restrictions on their usages and dosages would be necessary.On the other hand,because the glass eels were highly sensitive to Yuanchongqing,Zhihuanjin,Texiaozhihuanjin,Povidon Iodine Solution,Neomycin Sulfate,White Dot Net and XiaoGuadisha,applications of these chemicals should be avoided to warrant public safety.