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首页> 外文期刊>Archive of Fishery and Marine Research >Age-specific responses of Egeria radiata Lamarck (Lamellibranchia,Donacidae) to cadmium, lead and Lindane in static bioassay
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Age-specific responses of Egeria radiata Lamarck (Lamellibranchia,Donacidae) to cadmium, lead and Lindane in static bioassay

机译：静态生物测定中Eradiia radiata Lamarck（Lamellibranchia，Donacidae）对镉，铅和林丹的特定年龄响应

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摘要

The acute toxicity of cadmium (Cd), lead (Pb) and Lindane (gamma-hexachlorocyclohexane) to three size groups (representing different ages) of the West African freshwater clam Egeria radiata (Lamarck) was estimated in static toxicity tests over 96 h. Behavioural aberrations occurred in clams exposed to toxicants and were dose-dependent, while clams in control basins maintained normal activities throughout the test. period with no mortality among them. Mortality among ail sizes of clams exposed to cadmium and lead was consistently dose-dependent, but variable mortalities were recorded among medium and large size clams exposed to lead and Lindane. LC50 values of 7.73, 180.13 and 94.72 mg.l(-1) were obtained for cadmium, lead and Lindane respectively, in small clams; 7.73, 399.65 and 170.92 mg.l(-1) for cadmium, lead and Lindane in medium size clams and 9.44, 283.30 and 103.47 mg.l(-1) for cadmium, lead and Lindane in large size clams. Cadmium was the most toxic of three substances used, while small clams (aged 1 year) were the most vulnerable to all substances used. Medium size clams (aged 2 years) were the most resistant to both lead, and Lindane, followed by large size clams (aged 3 years and above). The environmental implications of the study are highlighted and discussed. [References: 45]
机译：在96小时的静态毒性试验中，估计了镉（Cd），铅（Pb）和林丹（γ-六氯环己烷）对西非淡水蛤E Egeria radiata（Lamarck）的三个大小组（代表不同年龄）的急性毒性。行为异常发生在暴露于有毒物质的蛤and中，并且与剂量有关，而在整个测试过程中，对照盆中的蛤maintained保持正常活动。没有死亡的时期。暴露于镉和铅的各种蛤的所有死亡率之间的死亡率始终是剂量依赖性的，但是记录到暴露于铅和林丹的中型和大型蛤lam的死亡率却变化不定。小蛤c中的镉，铅和林丹的LC50值分别为7.73、180.13和94.72 mg.l（-1）。中型蛤lam中的镉，铅和林丹为7.73、399.65和170.92 mg.l（-1），大号蛤s中的镉，铅和林丹为7.44、283.30和103.47 mg.l（-1）。镉是所用三种物质中毒性最高的，而小蛤c（1岁）对所有所用物质最脆弱。中型蛤（2岁）对铅和林丹的抵抗力最强，其次是大号蛤（3岁及以上）。该研究对环境的影响已得到强调和讨论。 [参考：45]

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