Effects of cypermethrin and diazinon on haematology of Labeo rohita (H.)

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International Journal of Development Research

Effects of cypermethrin and diazinon on haematology of Labeo rohita (H.)

Abstract: 

The study was conducted to investigate the effect of cypermethrin and diazinon on haematology of Labeo rohita (H.) in glass aquaria. Twelve batches of fish were exposed to two concentrations of cypermethrin (0.15 and 0.30 l/L) and diazinon (0.002 and 0.004 ml/L) for 96 hours and three batches of fish were treated as control. The blood parameters viz., total WBC and RBC count, Hb, PCV, MCV, MCH and MCHC values were analyzed using standard methods. A decrease in WBC and RBC count, Hb and PCV values were found in both concentrations of cypermethrin exposure (P<0.05). MCV value was decreased in low concentration and increased in high concentration whereas MCH and MCHC values were increased in low concentration and decreased in high concentration of cypermethrin exposure as compared to the control fish (P<0.05). On the other hand, WBC count and MCHC value were increased with increasing concentration of diazinon exposure whereas RBC count, Hb, PCV, MCV and MCH values were increased in both concentrations of diazinon as compared to the control fish (P<0.05). This study concluded that short-term exposure of cypermethrin and diazinon (even in low concentration) make substantial changes in haematology of L. rohita.

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