Impact of insecticide malathion on haematological alterations of freshwater fish labeo rohita

The Insecticide is common pollutants of freshwater ecosystems where they induce adverse effects on the aquatic biota. Fish, nutritional values. Fishes living in close association with may accumulate heavy metals. In the present investigation, the toxic effects of insecticide malathion LC50 0.25 ppm on t WBC and Hb in the fish, Labeo rohita were estimated. In the present study effect of malathion on RBC and Hb were found to be high ranges mean values at 10%, low values of hematological parameters were found to be 30% SLC, when compared to con showed a significant decreasing tendency at 10 and 30% sublethal concentrations when compared to control. The effect of malathion on WBC was found to be high ranges mean values at 30%, low values of hematological pa leucocytes number of Labeo rohita was increased with the increasing concentrations of insecticide malathion. Labeo rohita is an important carp species in Tamil Nadu region having good trol. Total erythrocytes of Labeo rohita rameters were found to be 10% SLC, when compared to control. The he total RBC,