稀有(鱼句)鲫亚慢性毒性试验

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FIVE-DAY SUBCHRONIC TOXICITY TEST FOR GROBIOCYPRIS RARUS

摘要: 研究了一种快速评价有毒化学品对稀有(鱼句)鲫慢性毒性的试验方法。选择+2,Cr+6,Zn+2和PCP;试验温度为25±1℃,每天更换试验液一次,试验持续5d。以现存量为测试指标,Cu+2,Cr+6,Zn+2和PCP对稀有(鱼句)鲫的无可观察效应浓度NOEC为20,2500,100,40ug／L;最低可观察效应浓度LOEC为40,5000,200,80ug／L,与7d亚慢性毒性试验结果相接近。试验结果表明,稀有(鱼句)鲫亚慢性毒性试验可从7d缩短为5d。

Abstract: A rapid approach was described to estimate the chronic toxicity of toxicantsto the Grobiocypris rarus.Tests were initiated .Tests were initiated using +2, Cr+6, Zn+2 and PCP were 20, 2500, 100, 40ug /L and 40, 5000, 200,80ug/L, respectively,when standing crop was used as endpoing.Compared with 7d subchronic test using the same reference toxicants, the results agreed well, whichindicate that short-term methods for estimating the chronic toxicity to freshwater fishmay be shorten from 7d to 5d.