Author(s):

Dr. Anju Kumari

Abstract: The effect of various concentrations of endosulfan, an organochlorine pesticide on the haematological and biochemical changes of Hetrobranchus bidorsalis was investigated in static bioassay under laboratory conditions. The concentrations the product used were 0.05, 0.10, 0.20, 0.30 and 0.0 (control) ml/L. The result of water quality parameters showed there were no significant difference (P>0.05) between the test media and the control. Abnormal behaviour such as imbalance position, secretion of mucus, erratic swimming, respiratory distress flashing and lethargy were observed before death during the exposure period. The exposure leads to a decrease in the levels of erythrocytes, leucocytes, haemoglobin, total protein and an increase in alkaline phosphatase, total bilirubin and plasma glucose when compared with the control. The implications of the findings in relation to the exposed fish and the aquatic environment are discussed.

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