A feeding trial was designed to determine the appropriate dietary protein and lipid levels for spotted scat (Scatophagus argus) juvenile. The experiment was conducted in a recirculating aquaculture system (RAS) with factorial 4 x 3 treatments consisting of two factors. Diets were formulated with a combination of four dietary protein levels (30, 35, 40, and 45%) and three dietary lipid levels (6, 9, and 12%). Each trial diet was fed in quadruplicate to fish groups (1.32 to 1.38 g fish-1) which were arranged in 100 L tanks at 30 fish per tank of stocking density and salinity maintained at 30‰. After 56 days of rearing, the fish survival rate in all treatments ranged from 95.0 to 98.4% and was not affected by dietary protein and lipid levels. The highest growth performance of fish was found in the treatment of 40% protein and 9% lipid (0.119 g day-1) and tended to decrease at higher protein levels 45% protein and 9% lipid (0.113 g day-1). There was an interaction (p < 0.05) between dietary protein and lipid levels in the feed intake. These results demonstrate that the diet containing 40% protein and 9% lipid provides sufficient nutrient and energy to support acceptable growth rates and nutrient utilization of S. argus juveniles.
Tạp chí khoa học Trường Đại học Cần Thơ
Lầu 4, Nhà Điều Hành, Khu II, đường 3/2, P. Xuân Khánh, Q. Ninh Kiều, TP. Cần Thơ
Điện thoại: (0292) 3 872 157; Email: tapchidhct@ctu.edu.vn
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