Haematological and Biochemical Studies in Clarias gariepinus Exposed to Monocrotophos and Dichlorvos

Acute toxicity of the organophophorus pesticides monocrotophos and dichlorvos was assessed using static toxicity method. Haematology and biochemical studies were carried out in fishes exposed to sublethal concentrations (10, 20% of 96h LC₅₀ value) of these pesticides, and sampled at 2, 4, 6, and 8 days with parallel untreated control. The results of haematological studies showed decrease in RBC, WBC, Hb and PCV values. Thrombocyte values increased in both the pesticides. Biochemical studies revealed hyperglycemia and hypoprotienemia as duration increased. The serum transaminases (SGOT & SGPT) and alkaline phosphatase values also increased with duration. The results were analysed using ‘t’–test.