茜素红S对扁吻鱼幼鱼的急性毒性试验

Acute toxicity of alizarin red S to Aspiorhynchus laticeps

为了解茜素红S对扁吻鱼(Aspiorhynchus laticeps)幼鱼的急性毒性,在水温10℃下,采用半静态法对体重范围(5.8±0.6)g的扁吻鱼幼鱼进行了试验。结果表明,茜素红S浓度为400 mg/L时,96 h死亡率为0;当茜素红浓度为900 mg/L时,72 h全部死亡;茜素红S对扁吻鱼幼鱼的24、48、72、96 h的半致死浓度分别为788、718、651、618 mg/L,安全质量浓度为179 mg/L。说明茜素红S对扁吻鱼幼鱼的毒性为低毒性,适合其标记放流。实际工作中,建议选用浓度179～400 mg/L作标记,在保证存活率的基础上,取得较好的标记效果。

In order to understand the acute toxicity of alizarin red S to Aspiorhynchus laticeps juvenile fish,the A.laticeps juvenile fish with body weight of(5.8±0.6)g was studied at 10℃ using a semi-static test method.The results showed that,when the concentration of alizarin red S was 400 mg/L,the mortality rate at 96 hours was 0;when the concentration of alizarin red S was 900 mg/L,all died within 72 hours;result showed the semilethal concentrations of alizarin red S on Aspiorhynchus laticeps at 24 hours,48 hours,72 hours,and 96 hours were respectively 788,718,651 and 618 mg/L.The safe mass concentration was 179 mg/L.Our results indicated that alizarin red S had low toxicity to Aspiorhynchus laticeps ,which was suitable for tagging and releasing of Aspiorhynchus laticep .In the practical work,on the basis of the guarantee survival rate,our results suggested selecting concentrations between 179 mg/L and 400 mg/L as tags to get better marks.