Cu^(2+)对日本林蛙蝌蚪的急性毒性研究

Acute Toxicity of Cu^(2+) to Rana japonica Tadpoles

采用标准方法测定了不同浓度下Cu2+对日本林蛙蝌蚪的急性毒性.结果表明,在水温21～24℃条件下,Cu2+对日本林蛙蝌蚪的24、48、72、96h毒性死亡几率与浓度对数的回归方程分别为y=3.2060x-2.6861,y=4.8309x-5.4046,y=6.5617x-8.5699和y=6.6910x-8.4263;半致死质量浓度(LC50)分别为249.70×10-3、142.48×10-3、116.96×10-3、101.53×10-3mg·L-1;显示了在鱼病防治中铜(Cu2+)对日本林蛙蝌蚪有一定的危害.同时讨论了不同蛙类蝌蚪对Cu2+的耐受力的差异.

A standard method was used to evaluate the acute toxicity of Cu^(2+) on tadpoles of Rana japonica at the water temperature of 21～24℃. The results showed that 24、48、72、96 h toxic tropic equations between mortality and Log of Cu^(2+) concentration on tadpoles were y = 3.2060x - 2.6861, y = 4.8309x - 5.4046, y = 6.5617x - 8.5699 and y = 6.6910x - 8.4263 respectively. The LC_(50) were 249.70 ×10^(-3),142.48 ×10^(-3),116.96 ×10^(-3),101.53×10^(-3) mg·L^(-1). The dose of Cu^(2+) used in curing fresh fish disease is harmful to the tadpoles. At the same time the different toleration to Cu^(2+) of the several species of amphibian tadpoles was discussed.