论文部分内容阅读
采用次生体腔注射、静水法研究了Cd^2+、Hg^2+和As^3+对可口革囊星虫的单一毒性试验。试验结果表明:Cd^2+、Hg^2+和As^3+对星虫的24 h LD50分别为:158.79mg/kg,87.39mg/kg和295.80mg/kg;48 h LD50分别为:74.94mg/kg,39.89mg/kg和46.35mg/kg。Cd^2+、Hg^2+、As^3+对星虫的毒性大小为:Hg^2+〉As^3+≈Cd^2+,LD50均随试验时间的延长而减小。毒性反应:注射Cd^2+组星虫身体伸长,吻变细,