Effect of malathion on some haematological parameters in a fresh water fish, Cyprinus carpio L.
Christo Queensly C, Venkadesh B, T Kumaran
Malathion is an organophosphate (OP) insecticide widely used in developing countries. Because of its high acute toxicity. LC50 96 hr value of malathion to the freshwater fish Cyprinus carpio (Linn) was determined through static bioassays. The fish were reared in two sublethal concentration (0.025mg/l and 0.012mg/l) of the pesticide for 10, 20 and 30 days. Blood was collected from the treated and control fish and used for clinically important haematological analysis. Malathion toxicity resulted in a significant decrease in all the sub lethal concentrations and maximum -36.17% in RBC, Hemoglobin content (-43.37), PCV (-21.21), MCV (+23.42), MCHC (-28.14), MCH (-11.28), WBC (-34.69) and differential leukocyte counts such as lymphocyte, neutrophil and monocyte were significantly decreased (p< 0.05). The result of this study reveals that the organophosphate pesticide malathion adversely affects the hematology of the freshwater fish Cyprinus carpio. L, and calls for the limited and cautious use of highly toxic pesticides like malathion.
Christo Queensly C, Venkadesh B, T Kumaran. Effect of malathion on some haematological parameters in a fresh water fish, Cyprinus carpio L.. International Journal of Biology Research, Volume 2, Issue 3, 2017, Pages 60-64