6种常见渔药对卵形鲳鲹的急性毒性

为给水产养殖者在水产用药的选择、使用剂量和方法上提供参考依据,使水产用药更科学化,减少动物源性食品污染和环境污染,采用96h静态水试验方法,在pH值为8.02~8.37,溶氧量6.0mg/L,盐度20~24,水温(29.0±2.0)℃条件下,研究了三氯异氰尿酸、浓戊二醛、高碘酸钠、溴氯海因、次氯酸钠和苯扎溴铵6种常见渔药对体质量(4.3±0.5)g卵形鲳鲹的急性毒性。结果显示,三氯异氰尿酸、浓戊二醛、高碘酸钠和溴氯海因对卵形鲳鲹的24h半致死质量浓度分别为3.519、14.166、0.092mg/L和6.448mg/L,96h半致死质量浓度分别为3.434、12.936、0.083mg/L和6.150mg/L,安全质量浓度分别为0.981、4.018、0.025mg/L和1.812mg/L;次氯酸钠和苯扎溴铵的24h半数致死含量分别为2.156μL/L和9.806μL/L,96h半数致死含量分别为1.981μL/L和8.756μL/L,安全含量分别为0.529μL/L和2.666μL/L。试验结果表明,三氯异氰尿酸、浓戊二醛、溴氯海因在生产中正常使用的质量浓度下较为安全,高碘酸钠、次氯酸钠和苯扎溴铵需谨慎使用。

Acute Toxicity of Six Conventional Drugs in Aquaculture to Golden Pompano Trachinotus ovatus

Acute toxicity of strong glutaral solution ,sodium periodate ,bromochlorohydantoin ,sodium hy‐pochlorite ,benzalkonium bromide and trichloroisocyanurie acid to golden pompano T rachinotus ov atus with body weight of (4 .3 ± 0 .5) g ,were studied in seawater filtered by sand ,at a pH of 8 .02—8 .37 ,dis‐solved oxygen level of above 6 .0 mg/L ,a salinity of 20—24 and water temperature of (29 .0 ± 2 .0) ℃ u‐sing 96 h static bioassay test .The results showed that the 24 h LC50 was 3 .519 mg/L in trichloroisocyanu‐rie acid ,14 .166 mg/L in strong glutaral solution ,0 .092 mg/L in sodium periodate ,6 .448 mg/L in bromo‐chlorhydantoin .2 .156 μL/L in sodium hypochlorite ,and 9 .806 μL/L in benzalkonium bromide ;The 96 h LC50 was 3 .434 mg/L ,12 .936 mg/L ,0 .083 mg/L ,and 6 .150 mg/L ,1 .981 μL/L ,8 .756 μL/L ;with the safe concentration of 0 .981 mg/L ,4 .018 mg/L ,0 .025 mg/L ,1 .812 mg/L ,0 .529 μL/L ,and 2 .666 μL/L .T he findings indicate that trichloroisocyanuric acid ,strong glutaral solution and bromochlorohydantoin are used safely in prodution ,but sodium periodate ,sodium hypochlorite ,benzalkonium bromide should be used caref ully .