Intoxication of Alphamethrin on the Haematology of Channa punctatus

Abstract

A bioassay experiment was conducted to examine the effect of alphamethrin on some blood parameters of Channa punctatus. Four concentrations viz. 0.0015625, 0.003125, 0.0125 and 0.025 ppm of alphamethrin was prepared. Lethal value was obtained at 0.025 ppm and all the experimental fish died within 24 hrs. At sublethal concentrations, alphamethrin induced remarkable changes in protein concentration, blood density, bleeding time and clotting time of the fish. Protein concentration was decreased after exposure to 0.0125 ppm alphamethrin for 30 days, while little change was observed in the blood density of fish due to the exposure to alphamethrin, but bleeding time and clotting time were enhanced. The changes become more significant with the increase in concentration of alphamethrin and exposure period. The results suggest that alphamethrin is capable of inducing alterations in the normal haematological values of Channa punctatus. Possible mode of action of alphamethrin in Channa punctatus is discussed.

Keywords

• Alphamethrin
• Channa punctatus
• Protein concentration
• Haematology