重金属对方形网纹溞的毒性研究  

Study of the Toxicity of Heavy Metals to Ceriodaphnia Quadrangula

作　　者：庄德辉[1] 

机构地区：[1]中国科学院水生生物研究所

出　　处：《重庆环境科学》1996年第1期47-50,共4页Chongqing Environmental Science

基　　金：国家自然科学基金

摘　　要：在静置换水条件下，研究了重金属对方形网纹的急性毒性和生活周期毒性。Ｈｇ２＋、Ｃｕ２＋、Ｃｒ６＋和Ｚｎ２＋在２５±１℃下对方形网纹的４ｓｈＥＣ５０分别为０．０１００、０．０２５４、０．１４４和０．２８２８ｍｇ／Ｌ。Ｈｇ２＋对方形网纹的７ｄ生活周期毒性试验，以存活、生长和生殖为毒性指标，未觉察反应浓度（ＮＯＥＣ）为５·９μｇＮＬ，最低觉察反应浓度（ＬＯＥｃ）为１１．８３μｇ／Ｌ，其毒性阈限在二者之间。重金属对方形网纹与大型及鱼类的急性毒性比较和Ｈｇ２＋对类生活周期的毒性比较均表明方形网纹较为敏感。The acute toxicity and life cycle toxicity of heavy metals to Ceriodaphnia quadrangula was studied under renewed static conditions.The 48hEC50 of Hg2+,Cu2+,Cr6+,and Zn2+ to C.quadrangula were estimated to be 0.0100,0.0254,0.1445,and 0.2828 mg/L,respectively,at 25±1℃.A seven.day life cycle toxicity tests of Hg2+ to C.quadrangula with immobility,growth and reproduction of the animals were estimated.No-Obs erved Effect Concentration(NOEC) of Hg2+ was 5.91μg/L and Lowest-Observed Effect Concentration(LOEC) was 11.83 μg/L.The apparent thresholds of toxicity to C.quadrangula for Hg2+ were determined within the range of 5.91～11.83μg/L.Comparative evaluation of the relative toxicity sensitivities of C.quadrangula and Daphnia macna as well as fish for heavy metals showed that C.quadrangula was more sensitive.

关 键 词：方形网纹蚤 毒性 生活周期毒性 试验 重有色金属 

分 类 号：X503.225[环境科学与工程—环境工程]