Many studies have been carried out on the toxicity of pollutants to aquatic animals , most of them are focused on the information of lethal concentrations , few have concerned the effects of sublethal concentration on the metabolism conditions 在污染物對于水生生物的毒害作用方面已經進行了大量的研究,但是大多為毒物致死濃度方面的報道,而關于在亞致死濃度時它們對于機體的生理影響卻很少報道。