重金属对安氏伪镖水蚤的急性毒性及摄食的影响  

The Acute Toxicity of Heavy Metals to Pseudodiaptomus Annandalei and the Effect on Ingestion

作　　者：石琛[1] 张君纲[1] 何学佳[1] 吕颂辉[1] 

机构地区：[1]暨南大学生命科学技术学院赤潮与水环境研究中心,广东广州510632

出　　处：《安徽农业科学》2011年第12期7265-7269,共5页Journal of Anhui Agricultural Sciences

基　　金：国家自然科学基金重点项目(U0733006);国家科技部重大基础研究专项(973项目)(2010CB428702);国家科技部海洋公益性专项(200805015)

摘　　要：[目的]研究桡足类浮游动物在重金属作用下的中毒效应以及摄食压力的变化。[方法]探究了Cu2+、Zn2+、Cd2+3种重金属离子对安氏伪镖水蚤的急性毒性,并研究了安氏伪镖水蚤在3种重金属影响下的摄食率变化。[结果]Cu2+、Zn2+、Cd2+对安氏伪镖水蚤的96 h LC50分别为0.1577、0.8941、0.1695mg/L,急性毒性由强至弱为Cu2+>Cd2+>Zn2+;急性中毒后,重金属离子对安氏伪镖水蚤摄食率的影响为:Cd2+>Cu2+>Zn2+,慢性中毒后,重金属离子对安氏伪镖水蚤摄食率的影响为Cu2+>Cd2+>Zn2+。且雄性成体的摄食率普遍低于雌性成体。[结论]3种重金属对安氏伪镖水蚤均有毒性效应。[Objective] The aim of the study was to investigate the toxicity effects of heavy metals on copepods and the change of grazing pressure of copepods under the presence of heavy metals.[Method] The acute toxicity of Cu2＋,Zn2＋,Cd2＋ to Pseudodiaptomus annandalei were studied,and the ingestion rates of Pseudodiaptomus annandalei were also studied with the existence of heavy metals.[Result] The 96h median lethal concentrations of these three heavy metals to Pseudodiaptomus annandalei were 0.157 7,0.894 1 and 0.169 5 mg/L.The toxicity order of these three heavy metals was obtained as follows：Cu2＋〉Cd2＋〉Zn2＋.It was found that the effect of heavy metals on the ingestion rates exhibited the order of Cd2＋.Cu2＋.Zn2＋ in the acute toxicity experiment.However,this order was changed to Cu2＋〉Cd2＋〉Zn2＋ and the ingestion rate of male adult was commonly lower than that of female adult in the chronic toxicity experiment.[Conclusion] There was genotoxic effect of three heavy metals on Pseudodiaptomus annandalei

关 键 词：安氏伪镖水蚤 Cu2+ Zn2+ Cd2+ 急性毒性 摄食率 

分 类 号：X131.2[环境科学与工程—环境科学]