Growth performance and feed utilization of keureling (Tor tambra) fingerlings fed a formulated diet with different doses of vitamin E (alpha-tocopherol)
The objective of the present study was to determine the optimum dosage of vitamin E (alpha-tocopherol) in the diet of keureling, Tor tambra (Val.) fingerlings for optimal growth performance and feed utilization. Five doses of vitamin E were tested: 0 mg kg-1 feed (control); 150 mg kg-1 feed; 300 mg kg-1 feed; 450 mg kg-1 feed; 600 mg kg-1. The feed ratio was 5% body weight, which was delivered twice daily at 08:00 and 17:00 for 60 days. The results showed that higher growth performance, feeding conversion ratios, feed efficiency, protein retention, and protein digestibility were obtained at 600 mg kg-1 feed, but the value was not significantly different from the other doses. The optimal dose in terms of the hepatosomatic index and survival rate was 300 mg kg-1. Hence, it was concluded that the optimum, most economical dose of vitamin E supplement for keureling (T. tambra) was 150 mg kg-1 feed, because this value was not significantly different from the doses of 300 and 600 mg kg-1 feed.
Z.A. Muchlisin [+], A.A. Arisa, A.A. Muhammadar, I.I. Arisa
Department of Aquaculture, Faculty of Marine and Fisheries, Syiah Kuala University, Banda Aceh 23111, Indonesia
Department of Aquaculture, Faculty of Marine and Fisheries
Syiah Kuala University, Banda Aceh 23111, Indonesia
School of Biological Sciences, Universiti Sains Malaysia
Centre for Marine and Coastal Studies, Universiti Sains Malaysia