Effect of Urea & DAP on Histological Parameters of Anabus testudineus (Kabai) Fish in rice field and ponds of Nabhata, Saharsa district

The acidity of mine water generally makes it toxic to most organisms. The Gills, kidneys and livers of Anabas testudineus Bloch fish inhabiting paddy field in rainy season and ponds of Nabhata, Saharsa, Bihar, were examined and compared to those of farmed fish. Tissue abnormalities were found in all investigated organs. Deterioration of gill filaments was found. Liver tissue revealed hemorrhages, blood congestion and necrotic cells with mononuclear cell infiltration. In addition, hypertrophy of the epithelial cells of the renal tubules with reduced lumens, aneurisms of the renal tubules, and contractions of the glomeruli in the Bowman’s capsule were observed. These histopathological findings suggest the some fertilisers like D.A.P and Urea in this habitat causes severe damage to the internal organs of fish and consequently alters their physiological status. Since the water in this pond is utilized by local people, these findings highlight the need for adequate water treatment.