EFFECT OF CARTAP HYDROCHLORIDE (50% SP) INSECTICIDE ON GILL HISTOLOGY OF THE FISH, CIRRHINUS MRIGALA (HAMILTON)G. Vani, K. Veeraiah, M. Vijaya Kumar and S.K. ParveenAbstract The fish, Cirrhinus mrigala, Indian major carp was exposed to Cartap hydrochloride and the static LC50 values for 24,48,72 and 96 hours were found to be 0.436, 0.419, 0.394 and 0.376 mg-1 and 0.399, 0.371, 0.361 and 0.339 mg-1 in Continuous flow-through system. The gills which are the primary organs to get exposed to foreign contaminants and pesticides were studied for histological changes. The following histological changes like epithelial lifting, degeneration of primary and secondary gill lamellae, curling of secondary gill filaments, atrophy of secondary gill lamellae, congestion of secondary lamellae, fusion of secondary gill filaments were observed. The results obtained were discussed at length with the available literature. By studying the histological deformities, it was concluded that the pesticide caused enough damage to the gills of the fish and can influence on the survival of the fish |