Variations in proximate and minerals composition of wild and cultivated clarias gariepinus (burchell, 1822)

Abstract

The proximateand minerals composition of wild and farmed Clarias gariepinus was studied toidentify nutritional difference that might induced by habitat change. Thirty sixindividual fish from both wild and hatchery-raised population were (averageweight = 0.78+1.23kg) collected from fishermen from river Oluwa, Osun and Owenaand from fish farmers in Akure, Ado Ekiti and Ilesa in Ondo Ekiti and Osun state respectively. The fishtissue were subjected to chemical analysis of protein, lipid, moisture ash andmineral content. The moisture contents recorded in muscle of wild and culturedC. gariepinus cultured was 5.75± 0.07 and 5.57 ± 0.10% respectively. Proteincontents in muscle from farmed and wild C. gariepinus were measured as69.35±0.08% and 67.23±0.07%, respectively. In wild and farmed C. gariepinus, lipids contents were measured as 16.03±0.08% and 18.61 ±0.09% respectively. C. gariepinus was analyzed for estimationof total ash contents which were 9.15±0.07% in wild and 8.41±0.08% in farmed C. gariepinus. Theminerals analysis revealed that C. gariepinus samples from wild hadsignificantly higher value in Mn, Cu and Mg, (1.95±0.04, 1.69±0.05 and1.82±0.43 respectively). The mean value for S, Ca, P, Na and K weresignificantly higher (0.32±0.04, 2.74±0.06, 0.44±0.06, 5.08±0.05 and 5.56±0.04)in cultured samples than the wild samples. No significant difference was observed for Zn and Co between thecultured and the wild fish. A significant difference was observed in chemicalcomposition of the fish obtained from wild and cultured sources. Higher levelof protein and lipids were observed in cultured C. gariepinus but lower in wildC. gariepinus. Values for moisture and ash content were significantly higher inwild C. gariepinus. It can be concluded that wild C. gariepinus collected fromsome rivers in south-west less contain protein and lipid and more moisture andash content compared with cultured C. gariepinus from the same region.