铜对大鳞泥鳅幼鱼的毒性

TOXICITY OF COPPER TO JAVENILE LOACH

摘要: 本文用流水和换水式试验,在水硬度为115mg/L(以CaCO3计)条件下研究了铜对大鳞泥鳅幼鱼生长和存活的影响。试验从刚孵出的幼鱼开始,流水式试验持续30d,换水式试验历时16d。结果表明,在流水条件下铜对泥鳅幼鱼存活有明显影响的可观察效应浓度最低是41.2μg/L,而无可观察效应浓度则为25.2μg/L。根据对现存量的影响,用换水式试验测得铜的最低可观察效应浓度为38μg/L,无可观察效应浓度是19μg/L。

Abstract: We investigated the effects of copper on the growth and survival of juvenile loach (Misqurnus mizolepis) in flow-through or renewal test with a hardness of 115 mg/L(as CaCO3). tests began using newly hatched loach larvae and were run for 30 days in flow-through test or 16 days in renewal test. The results showed that, in flow-through test, the lowest observed effect concentration (LOEC)for copper, at which significant effects on the survival of the loach were observed, was 41.2μg/L, and the no observed effect concentration(NOEC)was 25.2μg/L. In renewal test, the NOEC and LOEC for copper were 19 and 38μg/L respectively, based on the standing crop.