在水温(25±2)℃的条件下,采用静水水生生物测试方法,研究了硫酸铜、漂白粉和敌百虫对高体鳑鮍(Rhodeus ocellatus)鱼苗的急性毒性效应。结果表明,硫酸铜、漂白粉、敌百虫对高体鳑鲏鱼苗的毒性大小依次为硫酸铜>漂白粉>敌百虫,硫酸铜对该鱼苗在24、48 h的半致死浓度(LC50)分别为1.17 mg/L和0.83 mg/L,漂白粉对其在24 h、48 h的LC50分别为2.58 mg/L和1.94 mg/L,敌百虫对该鱼苗在24 h、48 h的LC50分别为21.31 mg/L和17.17 mg/L。硫酸铜、漂白粉、敌百虫对高体鳑鲏鱼苗的安全浓度(SC)分别为0.13 mg/L、0.33 mg/L和6.79 mg/L。 The effects of copper sulfate, bleaching powder and trichlorfon on the acute toxicity of Rhodeus ocellatus fry were studied at the water temperature of (25 ± 2) ℃ by using the hydrostatic test method. The results showed that the toxicity of copper sulphate, bleaching powder and trichlorfon to high-body catfish was in the order of copper sulfate> bleaching powder> trichlorfon. The LC50 of copper sulfate to the fish at 24 and 48 h were 1.17 mg / L and 0.83 mg / L respectively. The LC50 of bleaching powder at 24 h and 48 h were 2.58 mg / L and 1.94 mg / L, respectively. The LC50 of trichlorfon at 24 h and 48 h were 21.31 mg / L and 17.17 mg / L. The safe concentrations (SC) of copper sulfate, bleaching powder and trichlorfon were 0.13 mg / L, 0.33 mg / L and 6.79 mg / L, respectively.