重金属镉离子对斑腿泛树蛙蝌蚪的急性毒性研究

Study on Acute Toxicity of Cadmium Ion to Tadpoles of Polypedates Megacephalus

镉是珠三角区域水体、土壤中的主要重金属污染物之一,对该区域常见的斑腿泛树蛙蝌蚪进行急性毒性实验,共设置10个浓度,结果表明Cd^(2+)对斑腿泛树蛙蝌蚪的24 h、48 h、72 h和96 h的半致死浓度(LC50)分别为0.634 mg·L^(-1)、0.596 mg·L^(-1)、0.415 mg·L^(-1)和0.394 mg·L^(-1),Cd^(2+)浓度与LC50有一定的线性关系。比较镉离子对多种蛙类的毒性影响,斑腿泛树蛙的镉离子污染耐受能力中等。

Cadmium is one of the main heavy metal pollutants in the Pearl River Delta region of water and soil. The acute toxicity of Cadmium to tadpoles of polypedates megacephalus is handled with 10 different concentration of Cadmium, studied in acute tests. The result showed that the LC50 of Cadmium to tadpoles of polypedates megacephalus is 0.634 mg·L-1, 0.596 mg·L-1, 0.415 mg·L-1 and 0.394 mg· L-1 in 24 h, 48 h, 72 h and 96 h, respectively. There is a linear relationship between the concentration of Cd2＋ and LC50, Comparison toxic effects of cadmium ion on a variety of frogs, polypedates megacephalushave moderate tolerance to cadmium pollution.