Acute toxicity of the synthetic pyrethroid pesticide fenvalerate to some air breathing fishes |
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Authors: | Madhuban Datta Anilava Kaviraj |
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Institution: | 1. Department of Zoology , University of Kalyani , Kalyani-741235, West Bengal, India madhuban@indiatimes.com madhubanb@gmail.com;3. Department of Zoology , University of Kalyani , Kalyani-741235, West Bengal, India |
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Abstract: | Lethal concentrations (LC50) of a synthetic pyrethroid pesticide, fenvalerate, for three species of air breathing fish Clarias batrachus, Channa punctatus and Heteropneustes fossilis were determined under water and acetone soluble condition in the laboratory using the static bioassay procedure of the American Public Health Association (APHA,1995). Acetone soluble fenvalerate was found more toxic than the water-soluble fenvalerate irrespective of species and exposure periods. The LC50 value upon 96 days exposure to acetone soluble fenvalerate for C. batrachus, Channa C. punctatus and Heteropneustes H. fossilis were 1.35, 1.0 and 0.65?µg?L?1, respectively. It is concluded from the present study that fenvalerate is highly toxic even to the hardy air breathing fishes and the pesticide, when dissolved in water, remains photostable and active to render toxicity for long duration. |
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Keywords: | pyrethroid fenvalerate LC50 air breathing fish solvent |
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