Perfil bioquímico sérico de tilápias-do-Nilo criadas em tanques rede durante as estações do verão e inverno no município de Cachoeira Dourada, MG

Abstract

In recent years the growth of aquaculture in Brazil has been notable, with Nile Tilapia (Oreochromis niloticus) being the most established specie in the country. In order for production to continue growing and improving its indexes, studies on the physiology of these animals are necessary, but in the area of blood biochemistry, very discrepant data are still found. The aim of this study was to evaluate the physiological variations in the serum concentrations of proteins, metabolites, electrolytes and enzymes in Nile tilapias created in a tank in the city of Cachoeira Dourada MG in the summer and winter seasons. There were collected 200 blood samples of Nile tilapia (Oreochromis niloticus), being 100 in winter and 100 in summer, by caudal venipuncture, and subsequently the serum levels of serum proteins, metabolites, eletrolytes and enzymes. Serum concentrations of total proteins, globulins, triglycerides, high density lipoprotein (HDL), creatine kinase (CK), alkaline phosphatase (PAL), sodium and chloride were significantly higher during the winter season when compared to the summer season. While the serum concentrations of the enzyme aspartate aminotransferase (AST), uric acid and potassium were significantly lower during the winter season when compared to the summer season. It was concluded that there is influence of the season on some serum biochemical constituents of Nile Tilapia created in net tanks.