Cu^(2+)、Zn^(2+)、Cd^(2+)对厚颌鲂幼鱼的联合致毒效应研究  

Study on the joint toxicity of Cu^(2+)、Zn^(2+)、Cd^(2+) to the juvenile of Megalobrama pellegrini

作　　者：程霄玲[1] 郑永华[1] 唐洪玉[1] 金素雅[1,2] 谢全志 

机构地区：[1]西南大学动物科技学院水产系,重庆400715 [2]苏州大学,江苏苏州215104 [3]重庆市水产科学研究所,重庆400020

出　　处：《淡水渔业》2009年第2期54-59,共6页Freshwater Fisheries

基　　金：重庆市北碚区科学技术委员会重点科技项目(2006~2008-03);农业部长江中上游渔业资源环境重点野外科学观测实验站开放课题(2007-2008)

摘　　要：采用单因子静态急性毒性试验方法与加和等毒性溶液法,分别研究了Cu2+、Zn2+、Cd2+对厚颌鲂(M ega-lobrama pellegrini)幼鱼的急性毒性和联合毒性效应。结果显示:3种重金属离子对厚颌鲂幼鱼的毒性由强到弱依次为Cu2+、Cd2+、Zn2+,其中Cu2+对厚颌鲂幼鱼24 h、48 h、72 h、96 h的半致死质量浓度(LC50)分别为0.54 mg/L、0.38 mg/L、0.27 mg/L、0.23 mg/L;Cd2+对厚颌鲂幼鱼24 h、48 h、72 h、96 h的半致死质量浓度(LC50)分别为14.32 mg/L、8.34 mg/L、6.36 mg/L、4.44 mg/L;Zn2+对厚颌鲂幼鱼24 h、48 h、72 h、96 h的半致死质量浓度(LC50)分别为21.95 mg/L、17.56 mg/L、15.33 mg/L、14.62 mg/L。Cu2+、Cd2+、Zn2+对厚颌鲂幼鱼的安全质量浓度分别为0.056 mg/L、0.849 mg/L、3.372 mg/L。Cu2+、Cd2+、Zn2+两两共存时对厚颌鲂幼鱼96 h的联合毒性效应均表现为毒性增强的协同作用。Studied the acute toxicity and joint toxicity of Cu^2＋、Zu^2＋ and Cd^2＋ to juvenile of Megalobrama pellegrini by still water test method and equality toxicity meathod. The results indicated that the acute toxicities of three metal ion were in the sequence of Cu^2＋ 〉Cd^2＋ 〉Zn^2＋ , and the median lethal concentrations （LC50） of Cu^2＋ for24 h, 48 h, 72 h and 96 h to juvenile of Megalobrama pellegrini were 0. 54 mg/L, 0. 38 rag/L, 0. 27 mg/L and 0. 23 mg/L respectively; LC50 of Cd^2＋ for 24 h, 48 h, 72 h and 96 h to juvenile of Megalobrama pellegrini were 14. 32 mg/L,8. 34 mg/L,6. 36 mg/L, 4. 44 mg/L respectively and LCso of Zn^2＋ for 24 h, 48 h, 72 h and 96 h to juvenile of Megalobrama pellegrini were 21.95 mg/L, 17.56 mg/L, 15. 33 mg/L and 14. 66 mg/L respectively. The safe concentrations （SC） of Cu^2＋、Zu^2＋ and Cd^2＋ to juvenile of Megalobrama pellegrin were 0. 056 rag/L, 0. 849 mg/L and 3. 372 mg/L respectively. The 96 h joint toxicity results indicated that of any two ion ofCu^2＋、Zu^2＋ Cd^2＋ unit effect to juvenile of Megalobrama pellegrini were cooperate action.

关 键 词：Cu2+ Zn2+ Cd2+ 厚颌鲂(Megalobrama pellegrini) 幼鱼 联合毒性 

分 类 号：X171.5[环境科学与工程—环境科学]