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ACUTE TOXICITY AND BEHAVIORAL RESPONSE OF THE FOOD FISH CHANNA PUNCTATUS (BLOCH)TO AN INSECTICIDE DICHLORVOS

Abstract

Dichlorvos is an organophosphate insecticide and highly toxic pollutant, which adversely affects the fauna of aquatic ecosystems. The aim of the present study was to assess the acute toxicity of Dichlorvoson to food fish Channa punctatus. The fishes were exposed to different concentrations of Dichlorvos to determine LC50 values for 96 h and to study their behavioral alterations. The test fishes exhibited erratic swimming, decreased rate of opercular movement, copious mucous secretion, increased surfacing and inability to balance with increasing exposure time.

A. MISHRA1 AND A.N. PODDAR

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