悬浮物对半滑舌鳎稚鱼的急性毒性效应

Acute toxic effects of suspended substances on juvenile of Cynoglossus semilaevis Günther

研究了不同浓度悬浮物对半滑舌鳎（Cynoglossus semilaevis Giinther）浮游阶段和伏底阶段稚鱼的急性毒性效应。实验结果表明，悬浮物对浮游阶段稚鱼的48hLC50和96hLG0（95％可信限）分别为588．2mg／L（518．7～666．9mg／L）和488．7mg／L（428．6—557．2mg／L），安全浓度（SC）为48．87mg／L；水温（tw）为23℃时，对伏底阶段稚鱼的48hLCs0和96hLC50（95％可信限）分别为3034．6mg／L（2769．8～3324．8mg／L）和2117．2mg／L（1932．1～2320．1mg／L），SC为211．72mg／L；tw为26℃时，对伏底阶段稚鱼的48hLC50和96hLC50（95％可信限）分别为1684．0mg／L（1543．4～1837．3mg／L）和1657．1mg／L（1522．7～1803．4mg／L），SC为165．71mg／L。

The acute toxic effects of the suspended substances （SS） on the pro-juveniles and post-juveniles of Cynoglossus semilaevis GUnther were Studied in laboratory in Oct. 2007. The results showed that the 48 h LCso and 96 h LC50 （95% confidence limits） of SS to pro-juveniles were respectively 588.2 mg/L （518.7 - 666.9 mg/L） and 488.7 mg/L （428.6 -557.2 mg/L） ,and SC was 48.87 mg,/L. When the tw was at 23℃ ,the 48 h LCso and 96 h LCso （95% confidence limits） of SS to post-juveniles were respectively 3034.6 mg/L （2769.8 - 3324.8 mg/L） and 2117.2 mg/L （1932.1-2320.1 mg/L）, and SC was 211.72 mg/L. However,when the tw was at 26 ℃, the 48 h LC50 and 96 h LC50 （95 % confidence limits）were respectively 1684.0 mg/L （ 1543.4 - 1837.3 mg/L） and 1657.1 mg/L （1522.7 - 1803.4 mg/L） ,and SC was 165.71 mg/L.