TOXIC EFFECTS OF CHLORDANE AND MALATHION ON CERTAIN HEMATOLOGICAL PARAMETERS OF A FRESH-WATER TELEOST, NOTOPTERUS-NOTOPTERUS

The effects of sublethal concentrations (1/5th, 1/10th and 1/15th frac tions of 96 hour LC(50) of chlordane (organochlorine pesticide) and ma lathion (organophosphate pesticide) were studied on certain haematolog ical parameters of Notopterus notopterus after 30 days of exposure. Am ong the parameters examined the exposed fish exhibited higher values o f prothrombin time (PT), white blood corpuscles (WBC), and packed cell volume (PCV). However, the values of clotting time (CT) was found to be decreased due to pesticide intoxication. The concentrations assesse d did not have impact on gonado-somatic index (GSI), erythrocyte sedim entation rate (ESR), mean corpuscular heamoglobin (MCH), mean cell vol ume (MCV) and hepatosomatic index (HSI) as evidenced by Student 't' te st.