Abstract

The organophosphorus pesticide Phenthoate has been widely used in agriculture for several crops such as paddy, cotton and vegetables to control serious insects and mites in many areas of India. These chemicals cause severe damage to aquatic ecosystem especially to fishes. The main aim and objective of present study is to evaluate the impact on proteins metabolism in fingerlings of Labeo rohita an economically important Indian major carp. The lethal concentration was found to be 2.1mg/l under laboratory condition and 1/10 th of lethal concentration for 96hrs LC50 value is considered as sub lethal concentration. The exposure of fish to sub lethal concentration for 1, 4 and 8 days and investigated significant changes in the vital organs by following standard protocols. The results shows that the percentage of proteins degradation was minimum (7.62%) in gut and maximum percentage (11.76%) in liver for 1day, minimum reduction was (8.04 %) in brain and maximum was (13.64%) in liver for 4 days, minimum percentage depletion (8.36 %) in gill and maximum was (22.46%) in liver for 8 days compared to control. The total protein content levels rapidly induced might be due to the pesticide pollution and inhibition of metabolizing enzymes by toxicity. It is concluded that Phenthoate concentrations (low and high) is very toxic and causes alterations in vital organs of fish L. rohita.

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