Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

Vol 10, Issue 2, 2008; Page No.(341-349 )

LAMBDA CYHALOTHRIN INDUCED ALTERATIONS IN ANTIOXIDANT ENZYME STATUS OF VARIOUS TISSUES IN FRESHWATER CATFISH CLARIAS BATRACHUS

R. SARAVANAN, K. REVATHI AND P. BALAKRISHNA MURTHY

Abstract

Agricultural field runoff of pesticides has been implicated as a potential cause of aquatic biota toxicity.Pyrethroids are designed to act as insecticides but their potential impact in aquatic environment is largely and much greater in fish species and other aquatic organisms.Pyrethroids in water surface and sediments are taken up by pelagic organisms and sediment or bottom dwelling organisms causing a substantial risk to these organisms due to their strong hydrophobic and lipophilic nature.The present study was designed to investigate the impact of lambda cyhalothrin, a synthetic pyrethroid on benthic dwelling catfish Clarias bat rachus as they are potentially toxic to benthic organisms even at very low concentrations.A study was taken up to assess the activity of different antioxidant enzymes in liver, muscle, gills, kidney and testis on exposure of the fishes to the pyrethroid for 45 days.The activity of these antioxidant enzymes was studied at an interval of every 15 days till the end of the exposure period.Fluctuation in enzyme activity was noticed at different periods of exposure which may due to the adaptation of the fishes to the oxidative stress conditions.

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