文献类型： 外文期刊

作者： De Riu, N. ² ; Zheng, K. K. ³ ; Lee, J. W. ¹ ; Lee, S. H. ¹ ; Bai, S. C. ⁴ ; Moniello, G. ² ; Hung, S. S. O. ¹ ;

作者机构： 1.Univ Calif Davis, Dept Anim Sci, Davis, CA 95616 USA

2.Univ Sassari, Dept Anim Biol, I-07100 Sassari, Italy

3.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Qingdao, Shandong, Peoples R China

4.Pukyong Natl Univ, Dept Marine Biomat & Aquaculture, Feeds & Foods Nutr Res Ctr, Pusan, South Korea

关键词： body lipid;feeding rates;growth performances;sturgeon fry

期刊名称：AQUACULTURE NUTRITION （ 影响因子：3.497； 五年影响因子：3.78 ）

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收录情况： SCI

摘要： Four 1-week growth trials were conducted to determine the effects of feeding rates on the growth performances of white sturgeon (Acipenser transmontanus) fries 69 weeks after initiation of feeding. Six feeding rates with four replications were used in each of the four trials, and the feeding rates were 3.08.0, 2.07.0, 1.06.0 and 1.06.0% body weight (BW) per day in 1% increment, respectively. Number of fries per replicate and their initial BW (means +/- SEM) were 60, 45, 30 and 30 and 2.8 +/- 0.1, 4.5 +/- 0.4, 8.5 +/- 0.7 and 10.0 +/- 0.7 g, respectively. The fries were kept at 18-19 degrees C and fed a commercial salmonid feed (488 g kg-1 protein and 123 g kg-1 fat). Mortality was low and unrelated to feeding rates. Final body weights, body weight increases, specific growth rates and feed efficiency were significantly (P < 0.05) affected by the feeding rates. Body moisture and lipid contents were significantly affected by feeding rates except body moisture content in trial II. Body protein contents were not affected by feeding rates except in trial III. Broken-line analysis on specific growth rates indicated that the optimum feeding rates were 6.5 +/- 0.4, 4.8 +/- 0.2, 4.2 +/- 0.1 and 3.8 +/- 0.2% body weight per day, respectively, for white sturgeon fries 69 weeks after initiation of feeding.