Effects of Sublethal Concentrations of Zinc on Bioaccumulation and Architectural Alterations in the Liver of Fish Channa punctatus

Indiscriminate use of heavy metals has elevated the risk of contamination of the aquatic habitat. Present study has, therefore, been undertaken to investigate the alterations in bioaccumulation and histopathology of the liver in a freshwater teleost Channa punctatus. On exposure to three sublethal concentrations of zinc (10 mg/l, 15 mg/l and 25 mg/l) for 15 days, statistically significant increase in zinc concentration was noted in the liver of all treated groups. Simultaneously severe histopathological changes were also noted in the liver. Both bioaccumulation and histopathological changes were dose and duration dependent.