Acute Toxicity of Cypermethrin on Heteropneustes Fossilis

ABSTRACT

Several studies reported histopathological effects in testes of fishes exposed to different chemicals and pesticides. The reported degenerative changes in seminiferous tubules, enlarged interstitium and haemorrhage in intertubular area in albino rats exposed to pesticides.These changes may culminate in a partial or total arrest of spermatogenesis. observed exposure dependent and concentration mediated changes in testis a similar observations in lead treated rats. also documented concentration dependent effects of nonylphenol on testicular structure of the fish Xiphophorus maculates. reported extensive cytotoxic damage in the testes of gobbid fish Glossogobius giuris after fenthion exposure. observed appreciable reduction in size with spermatids and sperms in degenerating condition and necrosis of interstitial cells after fenthion treatment in Glossogobius giuris.

Decrease in number and condensation of spermatogonic cells and appearance of a large number of intertubular vacuoles, cloudy swelling and necrosis of seminiferous tubules are important histopathological alterations observed in testis of fish exposed to diazinon .These observations were in accordance with the findings of the present study. The present observations thus suggest that the testes of Heteropneustes fossilis have been adversely affected by cypermethrin which can result in decrease fertility potential. 

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