Growth performance of tinfoil barb (Barbonymus schwanenfeldii) fed with different protein levels and energy/protein ratios on diet

DEWANTORO, EKO and Dhahiyat, Yayat and Rostika, Rita and Zahidah, Zahidah and Iskandar, Iskandar (2018) Growth performance of tinfoil barb (Barbonymus schwanenfeldii) fed with different protein levels and energy/protein ratios on diet. Aquaculture, Aquarium, Conservation & Legislation - International Journal of the Bioflux Society, 11. pp. 1300-1310. ISSN ISSN 1844-9166 (online) ISSN 1844-8143 (print)

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Abstract

Tinfoil barb (Barbonymus schwanenfeldii) is a potential species which is developed as aquaculture commodity but it has slow growth. This study aimed to determine the best protein level and energy/protein ratio for the growth of tinfoil barb fingerlings. This study used factorial design of 4 x 2, i.e. protein levels (25, 30, 35 and 40%) and energy/protein ratios (8 and 10 kcal g-1 protein) with 3 replications. The rearing was done in 24 aquarium units sizing 60 x 40 x 40 cm filled with 60 L water. Then, tinfoil barb fingerlings with an initial weight of 6.89±0.62 g were reared for 60 days at a stocking density of 20 individuals per aquarium. The results showed that protein level and energy/protein ratio had a significant effect on protein retention (PR), fat retention (FR), energy retention (ER), final weight, specific growth rate (SGR), conditional factor (CF) and feed conversion ratio (FCR) (p < 0.05). While the interaction between protein level and energy/protein ratio only significantly influenced to FR and SGR (p < 0.05). The protein level at a value of 35% with an energy/protein ratio of 10 kcal g-1 protein could produce the highest PR and FR (p < 0.05). In addition, the feed containing 35% protein and an energy/protein ratio of 10 kcal g-1 protein also produced SGR (2.15±0.07%) which was higher than other treatments. There was no mortality of the fish during the experiment (survival rate, SR 100%). Hence, it was concluded that the feed containing 35% protein and an energy/protein ratio of 10 kcal g-1 which used as a treatment in this study resulted in the best growth performance of tinfoil barb fingerlings.

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