Dichlorvos, one of the extensively used insecticides was investigated in the present study for acute and sublethal toxicity. Fingerlings of common carp (Cyprinus carpio) were selected for the bioassay experiments. The 96 hour LC50 value was found to be ppm. For sublethal toxicity study two concentrations . 1/5th and 1/10th of LC50 were selected and semi-static bioassay method was used for 28 days (4 weeks) to observe pesticide induced changes in physiological activities (Feed consumption rate and Ammonia excretion rate). Present result revealed that Dichlorvos exposed fingerlings showed significant decrease in Food consumption rate and significant increase in ammonia excretion rate as compared to control groups. The obtained results indicate that Dichlorvos was toxic to fingerlings of common carp at sub lethal level. | Sub lethal effects of dichlorvos on physiological parameters in fingerlings of Cyprinus carpio
