Effect of water polluted with zinc sulphate on survival, behaviour, carbohydrate metabolism and blood parameters of cichlid fish, oreochromis niloticus (linnaeus, 1758)‎

Abstract EN

The effect of zinc on the freshwater fish, Oreochromis niloticus was assessed in static condition.

LC50 for 96 hours of time was computed as 93.32 mgL-l.

Remarkable changes in the behaviour of fish exposed to the sublethal concentrations of zinc were observed.

Frequency of occurrence of aggressive behaviour (threat and nip) and discomfort movements (fin-flickering, partial jerk and S-jerk) was increased in the fish exposed to zinc.

A significant (P

Haemoglobin concentrations were increased at all the concentrations tested.

An increase in the level of serum protein, triglycerides, cholesterol and glucose after zinc exposure was re~~stered These changes were more pronounced in higher concentrations.