Abstract
Rohu (Labeo rohita) is a fish of the carp family Cyprinidae, found commonly in rivers and fresh water lakes in and around South Asia and South - East Asia. The freshwater fish Labeo rohita were exposed to Mercury chloride (0.25 ppm) for 10, 20 and 30 days and its effect on blood – bio chemical properties in the form of hyperglycemia, hypoproteinemia and hypercholesteromia. The results of the present study that the blood – biochemical changes may lead to the fish morbidity and mortality.
Highlights
Water is the home of the fish and its quality is one of the most over looked aspect of pond management until it affects fish production
The results of the present study that the blood – biochemical changes may lead to the fish morbidity and mortality
A static bio - assay test was done to determine LC50 of Mercury chloride to Labeo rohita following the method of APHA (1985) and sublethal concentration was calculated by adopting the formula of Hart et al (1945)
Summary
Water is the home of the fish and its quality is one of the most over looked aspect of pond management until it affects fish production. Water quality generally means the component of water which must be present for optimum growth of aquatic organisms (Ehiagbonare and Ogundiran, 2010). Heavy metals have been announced to exert a vast range of metabolic, physiological, ecological and behavioral influences on fish (Soengas et al, 1996). Mercury is non biodegradable and non advantageous heavy metals and their role in the cell is not understood (Bailey et al, 1999). It enters the food was through bacteria, algal and fishes of freshwater and marine water etc. Examinations on the toxic effect of metals on fish are joined by the analysis of exchanges in some haematological and biochemical blood indices (Hoyle et al, 2007)
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