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Cd2+对红裸须摇蚊Propsilocerus akamusi 的急性毒性研究

Keywords: 红裸须摇蚊,Cd2+,LC50,急性毒性试验

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Abstract:

采用急性毒性实验方法,研究了水环境中常见污染物Cd2+对红裸须摇蚊Propsilocerusakamusi的急性毒性,结果表明,Cd2+对红裸须摇蚊在24h、48h以及72h的半致死浓度(LC50值)分别为235.63(95%CI:160.96~418.82)、165.17(95%CI:140.65~198.35)及94.12(95%CI:81.93~108.78)mmol·L-1Cd。Cd2+对红裸须摇蚊幼虫的毒性与对其他摇蚊物种幼虫有明显不同,该物种对Cd2+急性毒性不敏感,有非常强的耐受能力。同一时间不同浓度的Cd2+处理对CAT活性影响的LSD法多重比较检验结果显示,24h与48h的各浓度Cd2+对CAT活性都没有明显差异,只是在72h时CAT活性在对照组与其他处理浓度组之间的差异达到了显著性水平。时间因子对CAT活性的影响则主要表现为Cd2+浓度在400mmol·L-1时,72h处理组与48h处理组的活性表现出显著差异,CAT活性在72h时被显著抑制。

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