Effect of Commercial Insecticide Fipronil on the Brain of Channa striata (BLOCH)

Author(s): Sree Vidya, J* and Sarala Nair, S.

Abstract: Fipronil, one of the major insecticides currently in use in agricultural fields, is playing havoc to non–target organisms especially, fishes. Though literature on the effect of pesticides on fishes is aplenty, studies on the alterations in brain tissues are scanty, if not nil. The present study evaluated the effect of the commercial formulation of the insecticide fipronil on the brain tissues of Channa striata. The 96 hr LC50 was found to be 0.16mg/l and the histo-pathological changes like vacuolation in the molecular layer, degeneration of granular and molecular layer of cerebellum, infiltration of granular cells, and hyalinization of molecular layer were observed in the brain of Channa striata exposed to sublethal concentrations of the insecticide for a period of 4 weeks.

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