Use of pesticide in integrated farming in paddy field is recognized as a potential threat in aquatic organisms. The effect of sublethal toxicity of imidacloprid 17.8% SL pesticide on some biochemical parameters of a freshwater fish Catla catla were studied after 24 hr, 48 hr, 72 hr and 96 hr of exposure. The lethal concentration (LC50) of imidacloprid 17.8% SL for 96 hr was 4.11 ppm. The study suggests that exposure to imidacloprid 17.8% SL at low concentration results in significant biochemical alterations. The biochemical response of C. catla to the exposure to sub lethal concentrations of imidacloprid 17.8% SL showed a significant decrease (p<0.001) of proteins and glycogen in muscle and liver tissues compared to the control group. The observations from the present study showed that, imidacloprid 17.8% SL altered the biochemical composition of the various organs of test fish, due to utilization of biochemical energy to counteract the toxic stress.
IMIDACLOPRID, BIOCHEMICAL, CATLA CATLA
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