Hematological Responses of Tilapia Sarotherodon mossambicus (Peters) Exposed to the Pesticide, Sevin

Since the blood takes part directly or indirectly in various physiological processes of the body, hematological parameters are considered important biomarker of alterations in metabolism or physiology. Indiscriminate use of pesticides has polluted different water bodies with adverse effects on the health of aquatic biota including fishes. Toxicological effects of agrochemicals including pesticides can be observed by monitoring hematological parameters. Present review deals with study of effects of pesticides on the important blood parameters such as erythrocyte count, hemoglobin content, packed cell volume, erythrocyte sedimentation rate, absolute values, leucocyte count, coagulation time and thrombocyte count of freshwater fish species. The review also aims to explain possible mechanism of pesticide induced alterations in the parameters and deleterious consequences on fish health. Tilapia (Sarotherodon mossambicus) were exposed to 5, 10, 20, 40, & 60% concentration of the 96 hours, LC 50 value of Sevin for 7, 14 and 21 days. There was a significant decrease in the levels of hemoglobin and hematocrit of tilapia Sarotherodon mossambicus exposed to varied concentrations of Sevin indicating stress at higher concentrations.