Abstract

HISTOPATHOLOGICAL RESPONSES OF GILL, LIVER AND KIDNEY IN THE FRESH WATER FISH, CIRRHINUS MRIGALA EXPOSED TO CEMENT FACTORY EFFLUENT

* M. S. Juginu and T. Sujila

ABSTRACT

Polluted water has harmful impact on human health directly by drinking it or indirectly by eating the polluted food including fish. In fish, chemical and physical changes in the aquatic environment often induce various alterations in both blood and tissue causing physiological disturbances. The histopathological study of the organs in fish gives an idea about the intensity of the toxicity to which the animal is exposed to a particular toxicant. In the current research, the histopathological alterations in the fresh water fish, Cirrhinus mrigala on exposure to cement factory effluent is studied. The fish was exposed to varying levels of the toxicant concentrations using static bioassay to determine the median lethal concentration. The LC50 value is 1.20 per cent. The fish was exposed to different durations in sub lethal concentration (0.120 per cent) and histological alterations were compared with control fishes which maintained parallelly. The damages were severe in those fishes exposed to the effluent for long term duration.

Keywords: Cement factory effluent, LC50, Cirrhinus mrigala, Histopathology.