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

The proximate and minerals composition of wild and farmed Clarias gariepinus was studied to identify nutritional difference that might induced by habitat change. Thirty six individual fish from both wild and hatchery-raised population were (average weight = 0.78+1.23kg) collected from fishermen from river Oluwa, Osun and Owena and from fish farmers in Akure, Ado Ekiti and Ilesa in Ondo Ekiti and Osun state respectively. The fish tissue were subjected to chemical analysis of protein, lipid, moisture ash and mineral content. The moisture contents recorded in muscle of wild and cultured C. gariepinus cultured was 5.75± 0.07 and 5.57 ± 0.10% respectively. Protein contents in muscle from farmed and wild C. gariepinus were measured as 69.35±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 estimation of total ash contents which were 9.15±0.07% in wild and 8.41±0.08% in farmed C. gariepinus. The minerals analysis revealed that C. gariepinus samples from wild had significantly higher value in Mn, Cu and Mg, (1.95±0.04, 1.69±0.05 and 1.82±0.43 respectively). The mean value for S, Ca, P, Na and K were significantly 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 the cultured and the wild fish.A significant difference was observed in chemical composition of thefish obtained from wild and cultured sources. Higher level of proteinand lipids were observed in cultured C. gariepinus but lower in wildC. gariepinus. Values for moisture and ash content were significantlyhigher in wild C. gariepinus. It can be concluded that wild C.gariepinus collected from some rivers in south-west less containprotein and lipid and more moisture and ash content compared withcultured C. gariepinus from the same region.

Keywords:

Proximate composition , Wild , Farmed , Catfish , Clarias gariepinus , Protein contents