稀有ju鲫-一种新的鱼类毒性试验材料

A New Toxicity Test Organism--Gobiocypris rarus

摘要: 本文研究了稀有ju鲫(Gobiocypris rarus) 作为毒性试验材料的可行性。采用换水式试验，在硬度为200 mg/L (以CaCO3计)、pH7.8±0.2、温度24-25℃条件下研究了铬、铜、锌和五氯酚(PCP)对稀有ju鲫的急性毒性。重铬酸钾对2日龄稀有ju鲫的24 h和96 h和LC50控制范围分别263.6-334.7和115.3-178.5 mg/L (n=8)。铬、铜、锌和五氯酚对2日龄稀有ju鲫的急性毒性值(96 h LC50)范围，从铜的52.2 μg/L到铬的52000 μg/L，毒性大小的顺序是铜>五氯酚>锌>铬。研究结果表明，稀有ju鲫有可能发展成为一种较为理想的毒性试验材料。

Abstract: This study deals with the evaluation of Gobiocypris rarus as a toxicity test material.The acute toxicity of chromium,copper,zinc and pentachlorophenol (PCP) to Gobiocypris rarus were determined under renewal condition with a hardness of 200 mg/L (as CaCO3) at Ph7.8±0.2 in water held at 24-25℃.The control limits of 24 h and 96 h LC50 of potassium dichromate to 2 d old Gobiocypris rarus were 263.6-334.7 and 115.3-178.5 mg K2Cr2O7/L (n=8).The values of the acute toxicity (96 h LC50) to 2 d old Gobiocypris rarus ranged from 52.2 μg/L for copper to 52000 μg/L for chromium,and were ranked in order of toxicity:Cu>PCP>Zn>Cr.The results of this study indicated that Gobiocypris rarus may be a proper animal for toxicity test.