Body composition and compensatory growth in Nile tilapia Oreochromis niloticus under different feeding intervals  

作　　者：高阳 王子威 HUR Jun-wook LEE Jeong-Yeol 

机构地区：[1]Fishery School, Zhejiang Ocean University [2]Department of Aquaculture and Aquatic Science, Kunsan National University [3]Bio-Monitoring Center

出　　处：《Chinese Journal of Oceanology and Limnology》2015年第4期945-956,共12页中国海洋湖沼学报（英文版）

摘　　要：We investigated the growth and body composition of Nile tilapia under five different feeding regimes. A control group was fed to satiation twice daily for 185 days; four treatment groups were fed at intervals of 2, 3, 4 or 7 days(dietary ‘restricted' period, days 0–80) and then fed to satiation(‘refeeding' period, days 80–185). Compensatory growth in weight and length of the feed-restricted groups was observed during the refeeding period. However, the growth of none of the restricted groups caught up with that of the control group over the experimental period. Feed intake upon refeeding increased with the duration of deprivation. There were no significant differences in feed efficiency between the restricted and control groups during the refeeding stage, suggesting that hyperphagia was the mechanism responsible for the increased growth rates during this period. Tilapia preferentially used n-3 polyunsaturated fatty acids and nonessential amino acids during the restricted-feeding period. Higher production was achieved by higher feed consumption. We suggest that if attainment of market size in minimum time is required, fish should be consistently fed to satiation, while taking care to avoid the possible negative consequences of overfeeding.We investigated the growth and body composition of Nile tilapia under five different feeding regimes. A control group was fed to satiation twice daily for 185 days; four treatment groups were fed at intervals of 2, 3, 4 or 7 days （dietary ＇restricted＇ period, days 0-80） and then fed to satiation （＇refeeding＇ period, days 80-185）. Compensatory growth in weight and length of the feed-restricted groups was observed during the refeeding period. However, the growth of none of the restricted groups caught up with that of the control group over the experimental period. Feed intake upon refeeding increased with the duration of deprivation. There were no significant differences in feed efficiency between the restricted and control groups during the refeeding stage, suggesting that hyperphagia was the mechanism responsible for the increased growth rates during this period. Tilapia preferentially used n-3 polyunsaturated fatty acids and nonessential amino acids during the restricted-feeding period. Higher production was achieved by higher feed consumption. We suggest that if attainment of market size in minimum time is required, fish should be consistently fed to satiation, while taking care to avoid the possible negative consequences of overfeeding.

关 键 词：restricted feeding HYPERPHAGIA feed efficiency fatty acid amino acid TILAPIA 

分 类 号：S965.125[农业科学—水产养殖] S812.8[农业科学—水产科学]