Cu^(2+)、Zn^(2+)对舟形无齿蚌成熟钩介幼虫的毒害作用

Toxicity of Cu^(2+)and Zn^(2+)to Mature Glochidia of Anodonta Euscaphys

报道了不同浓度的Cu2+、Zn2+对舟形无齿蚌成熟钩介幼虫的毒害实验.结果表明:Cu2+在24h、48h、72h、96h时对钩介幼虫的半致死浓度分别为651.4μg/L、113.8μg/L、45.5μg/L、19.7μg/L;Zn2+在24h、48h、72h、96h时对钩介幼虫的半致死浓度分别为10296.7μg/L、2612.3μg/L、171.1μg/L、15.9μg/L.在同一时间内浓度越高,钩介幼虫死亡率越大.在同一浓度下随时间延长,钩介幼虫死亡率增大.而半致死浓度随时间的延长却减小.

This paper reported the toxicity of Cu2+and Zn2+to mature glochidia of A.euscaphys at different concentrations. The result shows : after the glochidia were continuly exposed to Cu2+at 24 h?48 h?72 h?96 h, the LC50 of Cu2+was respectively 651.4 μg/L?113.8 μg/L?45.5 μg/L?19.7 μg/L, and after the glochidia were continuely exposed to Zn2+at 24 h?48 h?72 h?96 h, the LC50 of Zn2+was respectively 10 296.7 μg/L?2 612.3 μg/L?171.1 μg/L?15.9 μg/L. During the same time the mortality of glochidia is gradually increase with the concentration increase, and during the same concentration, the longer the time, the higher the mortality of glochidia. But the LC50 drops with delay of time.