author(s)
Omosowone, Olajumoke Olamiposi and Otitolaye, Gbemisola Tolulope

abstract
The experiment was carried out at the Federal University of Technology, Akure, Nigeria from April - September, 2015. Six iso-nitrogenous (35% crude protein) diets were fed to triplicate groups of Heteroclarias (2.42±0.16 g) for 56 days in glass aquaria at a stocking rate of 10 fish/tank. Result revealed significant differences (p<0.05) in mineral components and growth performance indices analyzed. Whole fish body had sodium (26.10–38.34 mg/kg), calcium (43.90 – 53.20), potassium (47.80–70.00), magnesium (5.61–6.24), zinc (0.30–0.96)), iron (0.79–1.00), copper (0.06–0.13) and phosphorus (135-229), sulphur (1.02–4.91) with the highest recorded in SP4, SP3, SP2, SP1, SP4, SP4, SP5, SP2 and SP2 respectively. Culture water parameters (dissolved oxygen, temperature and pH) were within range values for culturing tropical aquaculture fish species. Result showed that incorporating sweet potatoes meal into hybrid catfish diets improved carcass mineral composition and did not affect water parameters negatively.