| 对二氯苯和镉对草鱼(Ctenopharyngodon idellus)的联合毒性效应研究 |
| 摘要点击 2574 全文点击 1273 投稿时间：2006-01-19 修订日期：2006-06-08 |
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| 中文关键词 对二氯苯 镉 联合毒性 草鱼 协同作用 拮抗作用 |
| 英文关键词 1,4-dichlorobenze cadmium joint toxicity grass carp synergistic antagonistic |
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| 中文摘要 |
| 以静水法生物测试研究了对二氯苯和镉对草鱼(Ctenopharyngodon idellus)的联合毒性效应,并采用Marking水生毒理联合毒性相加指数法对联合毒性效应进行了评价.结果表明， 对二氯苯和镉对草鱼的单一毒性作用时,24、48、72和96 h对二氯苯对草鱼的LC50分别是10.11、9.04、8.52和7.83 mg/L; 24、48、72和96 h镉对草鱼的LC50分别是40.02、35.05、28.99和24.41 mg/L,因此对二氯苯的毒性大于镉的毒性. 对二氯苯和镉对草鱼种的联合毒性作用,当采用毒性1∶1进行试验时,暴露时间分别为24、48、72、96 h时AI>0,联合作用结果为协同作用,而当采用浓度1∶1进行试验时,表现出暴露时间为24、48、72 h的AI<0,联合作用结果表现为拮抗作用,而暴露时间为96 h时AI>0,联合作用结果则为协同作用,即随着暴露时间的增加,对二氯苯和镉的联合毒性作用从拮抗作用转变为毒性剧增的协同作用. |
| 英文摘要 |
| The joint toxicity of 1,4-dichlorobenze and cadmium to grass carp (Ctenopharyngodon idellus) was examined using the static test method. The additive index method was used to evaluate the joint toxicity. The single toxic tests showed that LC50 of 24,48,72 and 96 h for 1,4-dichlorobenze to grass carp are 10.11,9.04,8.52 and 7.83 mg/L,respectively. Those for cadmium are 40.02,35.05,28.99 and 24.41 mg/L,respectively. So the single toxic sequence of 1,4-dichlorobenze and cadmium was 1,4-dichlorobenze>cadmium. The joint toxicity of 1,4-dichlorobenze and cadmium was synergistic while the toxicity was 1∶1 at 24 h,48 h,72 h and 96 h. But the joint toxicity of 1,4-dichlorobenze and cadmium was antagonistic at 24 h,48 h and 72 h,it was synergistic at 96 h while the concentration was 1∶1. |
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