Ảnh hưởng của tần suất cho ăn đến tăng trưởng và tỷ lệ sống của ếch Thái Lan (Rana tigerina) giai đoạn nuôi thương phẩm

Abstract

This study evaluates the effect of feeding frequency on growth performance and survival rate of Thai frog (Rana tigerina) at grow-out stage, aiming to determine the optimal feeding frequency for culturing frog. The experiment was randomly set up with 4 replications of 3 treatments which were different feeding frequencies: NT1: 2 times (7h, 17h), NT2: 3 times (7h, 12h, 17h) and NT3: 4 times/day (7h, 12h, 17h, 22h). Frogs (average weight of forg was 3.51 ± 0.21 g/frog) was cultured in 12 composite tanks (0.5 m³/tank) with the density of 60 frog/tank. After 8 weeks of experiment, the reults of feeding treatment of 4 times/day had the highest growth performance (WG = 175.89 g, DWG = 3.14 g/day) and the difference was statistically significant (p<0.05) in comparison with feeding treatment of 2 and 3 times/day. The survival rate in feeding treatment of 4 times/day got the highest results (88.33%); however, there were not statistical differences compared to the other treatments (p>0.05). In addition, the feed conversion ratio (FCR = 1.05) and the feed cost for 1 kg of frog (21.06 thousand VND/kg) were lowest in feeding treatment of 4 times/day. Based on the obtained results, the most suitable feeding frequency for farming Thai frog in this study was 4 times/day.