Toxicopathological impact of lethal concentration (925 mg/l) of lead nitrate on the gills of air-breathing catfish Heteropneustes fossilis was analysed. Following exposure the gills exhibited rapid alterations that include detachment and lifting of the epithelial linings from the surfaces of the gill filament (primary, PL) and respiratory (secondary, SL) lamellae. This led to extensive haemorrh...

Heteropneustes fossilis (Heteropneustidae) is an air breathing freshwater catfish, has an ever increasing demand as a major source of protein and vitamin A. Acid precipitation has detrimental effect on fish population. We have investigated the activity and localization of the enzyme alkaline phosphatase (ALP), by means of histochemical study on experimental wound repair in the fish skin under a...