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The effect of feeding rate on the growth performance of green sturgeon (Acipenser medirostris) fry

文献类型： 外文期刊

作者： Zheng, K. K. 1 ; Deng, D. F. 2 ; De Riu, N. 3 ; Moniello, G. 3 ; Hung, S. S. O. 4 ;

作者机构： 1.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Qingdao, Shandong, Peoples R China

2.Ocean Inst, Aquat Feeds & Nutr Dept, Waimanalo, HI USA

3.Univ Sassari, Dept Vet Med, I-07100 Sassari, Italy

4.Univ Calif Davis, Dept Anim Sci, Davis, CA 95616 USA

关键词： feeding rate;fry;green sturgeon;growth performance

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

ISSN：

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收录情况： SCI

摘要： Four one-week growth trials were conducted on green sturgeon fry to determine the effect of feeding rate on their growth performance at 18 degrees C when they were fed a salmonid soft moist feeds containing 445-457gkg(-1) of crude protein and 201-207gkg(-1) of lipid. The fry used in Trials I-IV were 5-8weeks after their initiation of exogenous feeding. Their average initial body weights were 1.63 +/- 0.01, 2.63 +/- 0.03, 5.08 +/- 0.08 and 7.49 +/- 0.05g, respectively. Six feeding rates used were as follows: 2.5-15.0% body weight per day (% BWday(-1)) with a 2.5% increment in Trial I; 1.25-7.50% BWday(-1) with a 1.25% increment in Trial II; and 2.0-7.0% BWday(-1) with a 1.0% increment in Trials III and IV. Four replicates with 50 fry per tank in Trials I-III and 30 fry per tank in Trial IV were assigned randomly to each feeding rates. The final body weight, specific growth rate, feed efficiency, protein retention, and whole-body moisture, lipid, and energy contents were significantly (P<0.05) affected by the feeding rates. The optimum feeding rates determined by the broken-line model were 7.1, 5.7 and 5.3% BWday(-1) for Trials I, II and IV, when the fry were 5, 6 and 8weeks after their initiation of exogenous feeding, respectively.

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