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《Journal of Fisheries of China》 2004-03
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Effect of starvation and compensatory growth on feeding, growth and body biochemical composition in Acipenser schrenckii juveniles

GAO Lu-Jiao~(1,2), CHEN Li-Qiao~1, SONG Bing~1 (1. College of Life Sciences, East China Normal University, Shanghai200062, China; 2. Lab of Aquaculture and Germ Plasm Resource, East China Sea Fisheries Research Institute, Chinese Academy of Fisheries Sciences, Shanghai200090, China )  
The effect of starvation for different time and re-feeding on growth, feeding and body biochemical composition of Amur sturgeon juveniles(Acipenser schrenckii) were investigated indoor under 22±2℃. The body weight and ratio of RNA/DNA of fish decreased with the increasing of starvation period. After being deprived of food for 7 days, 14 days or 21 days, body weight was significantly lP0.01). At the same time, protein, lipid and glycogen content of fish were lower, while ash and moisture content became higher of the starved group than that of the control. The liver glycogen and muscle glycogen content reduced mainly in the first week, and lipid and protein content reduced obviously in second and third week of food deprivation respectively. The results indicated that sturgeon juveniles mobilize energy from glycogen, lipid and protein in turn. Upon re-feeding, all the starved groups exhibited higher feed intake rates and specific growth rates than that of the control group. The ratio of RNA/DNA of fish deprived of food for 7 and 14 days reached or approximated to that of the control, while the ratio of RNA/DNA of the testing fish starved for 21 days was lower significantly comP0.05). After re-feeding for 30 days, there were no significant differences in body biochemical composition among four groupP0.05). The fish deprived of food for 7 and 14 days were able to catch up with the control in body weight, while the fish weight of starving 21 P0.05). It suggested that both complete and partial compensation is contributed somewhat by improvement feeding rate in Amur sturgeon.
【Fund】: 教育部"跨世纪优秀人才培养计划"基金;; 高等学校骨干教师资助计划项目部分资助
【CateGory Index】: S917
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