Studies on lethal concentrations and toxicity stress of some xenobiotics on aquatic organisms

被引：110

作者：

Farah, MA

Ateeq, B

Ali, MN

Sabir, R

Ahmad, W ^{[1
]}

机构：

[1] Aligarh Muslim Univ, Dept Zool, Gene Tox Lab, Div Genet, Aligarh 202002, Uttar Pradesh, India

[2] Univ Kashmir, PG Dept Zool, Srinagar 190006, Jammu & Kashmir, India

来源：

CHEMOSPHERE | 2004年 / 55卷 / 02期

关键词：

acute toxicity; LC50; behavioral changes; PCP; 2,4-D; butachlor;

D O I：

10.1016/j.chemosphere.2003.10.063

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 [工学]; 0830 [环境科学与工程];

摘要：

Three widely used xenobiotics pentachlorophenol (PCP), 2,4-dichlorophenoxyacetic acid (2,4-D) and 2-chloro-2,6-diethyl-N-(butoxymethyl) acetanilide (Butachlor) are evaluated for acute toxicity and stress behavior on freshwater fish (Heteropneustes fossilis, Clarias batrachus, Channa punctatus) and mosquito larvae (Culex pipiens fatigans). The experiment was carried out by medium treatment using intermittent flow-through system. Median lethal concentrations (LC50) were calculated by probit analysis. The LC50 values and 95% confidence intervals showed variable range for tested chemicals. Mosquito larvae generally appeared resistant than fish, while H. fossilis was found to be most sensitive. Stress signs in the form of behavioral changes are also observed. Both types of organisms are recommended as good bioindicator for the risk assessment of aquatic environment due to chemicals tested. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：257 / 265

页数：9

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