Studies of Cypermethrin Activity on Steroidogenesis in Male Labeo Rohita.

Cypermethrin is a widely used type II Pyrethroid. As such it has become a contaminant in fresh water aquatic ecosystems. To know its toxic effect on steroidogenesis in male fish Labeo rohita, we have exposed six male fish to 10 and 20 μg/L of Cypermethrin for six days. The plasma concentration of Vitellogenin (VTG), testosterone (T) and 11-ketotestosterone (11 KT) were evaluated. Vitellogenin levels increased with increasing concentration of Cypermethrin, where as Testosterone and 11-Ketotestosterone levels decreased with increasing concentration of Cypermethrin.