Compensatory growth in hybrid tilapia (Oreochromis mossambicus×O.Niloticus) reared in seawater, following restricted fee
Hybrid tilapia weighing 7.71 g were reared in seawater at 24.0-29.0℃ for 8 weeks. The controls were fed to satiation twice a day throughout the experiment, whereas treatment groups were fed at 0.5%, 1.5% or 3.0% body weight per day for 4 weeks, and then to satiation for the remainder of the experiment. During the first 4-week period, there was a curvilinear relationship between growth rate and ration size. Fish fed 0.5% and 1.5% rations displayed compensatory growth response of 2 weeks duration during realimentation. The weight-adjusted growth rate of fish fed at 3% ration was not significantly different from that of the controls by the end of the experiment, when none of the treatment groups had caught up in body weight with the controls. Hyperphagia was observed for the first 2 weeks of realimenatation in fish previously fed at 3% ration, but persisted for the whole realimentation period in groups previously fed at 0.5% and 1.5% rations. None of the feed restricted groups showed improved digestibility, feed efficiency, or protein and energy retention efficiency.
作 者： WANG Yan CUI Yibo Yang Yunxia CAI Fasheng 作者单位： WANG Yan(Key Laboratory of Genetic Resources and Ecology in Aquaculture, Shanghai Fisheries University, Shanghai 200090, China)CUI Yibo,Yang Yunxia(State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China)
CAI Fasheng(Laboratory of Marine Biology, Shantou University, Shantou 515063, China)
刊 名： 中国海洋湖沼学报（英文版） ISTIC SCI 英文刊名： CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 年，卷(期)： 2004 22(4) 分类号： P7 关键词： hybrid tilapia compensatory growth feed restriction ration level