Farah, M.Abul ; Ateeq, Bushra ; Ali, M.Niamat ; Sabir, Rubina ; Ahmad, Waseem (2004) Studies on lethal concentrations and toxicity stress of some xenobiotics on aquatic organisms Chemosphere, 55 (2). pp. 257-265. ISSN 00456535
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Official URL: http://doi.org/10.1016/j.chemosphere.2003.10.063
Related URL: http://dx.doi.org/10.1016/j.chemosphere.2003.10.063
Abstract
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.
Item Type: | Article |
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Source: | Copyright of this article belongs to Elsevier Ltd. |
Keywords: | Acute toxicity, LC50, Behavioral changes, PCP, 2,4-D, Butachlor |
ID Code: | 127340 |
Deposited On: | 13 Oct 2022 09:33 |
Last Modified: | 13 Oct 2022 09:33 |
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