TEXTILE DYEING EFFLUENT INDUCED HISTOPATHOLOGY IN THE GILLS OF TILAPIA MOSSAMBICA

摘要

The present investigation was carried out to study the toxicological effect of the dyeing effluents discharged from the industrial cluster present in Telungupalayam area of Coimbatore city in the fish, Tilapia mossatnbica. The study pertains to laboratory analysis of the toxicity of textile effluent on histopathological indices in the gills of Tilapia mossatnbica. The work was designed on the basis of the LC_(50) value (12.06%) of the textile effluent obtained during the bioassay conducted in Tilapia mossatnbica. The fish, on exposure to textile dyeing effluent showed abnormal behaviour such as surfacing phenomenon, rapid, repeated opening and closing of mouth accompanied by partially extended fins. Histological assessment of fish exposed to textile dyeing effluent revealed remarkable alterations in the gill. The study revealed histopathological conditions that affect the physiological functions such as respiration, excretion and circulation.