鳗鲡仔鱼(Anguilla japonica Temn.et Schl.)对铜离子的回避反应

本文力图用回避实验的方法分析铜离子对闽江鳗鲡及其他水产资源的影响。实验在流水中进行,温度为16±0.5℃,pH为7.43±0.2,溶解氧为62—68.9％;鱼体长为46—69.5mm,重量为174.2—226.6mg;每一浓度测试20次。当浓度为0.0001ppm时,回避度为12.81％;浓度为0.016ppm时,有明显的回避反应,回避度为58.28％;浓度升至0.064ppm时,回避度84.74％,为完全回避。

The Avoidance of Eel Larvae (Anguilla japonica Tem. et Schl.) in the Solution Containing Copper Ions.

Theavoidance of ell larvae (Anguilla japonica) in the solution containing copper sulfate (as Cu2 + ) has been studied in a flowing water system under the laboratory conditions: water temperature 16.5 C, pH 7.43, water hardness (CaCO3 and others contained) 220 mg/L and saturation of DO 62-68%. The larvae used for the experiment were collected from the Minjiang River, Fujian Province. Their lengths ranged 46-69.5 mm,and their -weights 174-227 mg. The experiment illustrated that the ell larvae was highly sensitive to copper, because the avoidance action was obserbed at the level of 0.001 ppm of copper ions. However, below the level of 0.001 ppm, the avoidance was not so obvious, but the larvae all avoided the test solution as its concentrations increased to 0.064 ppm. The results indicated that the concentrations of avoidance against copper was much lower than that of MATC derived from acute toxicity test.