An evaluation of stocking density in the cage culture efficiency of Amur sturgeon Acipenser schrenckii
文献类型： 外文期刊
作者： Zhu, Y. J. 1 ; Yang, D. G. 1 ; Chen, J. W. 1 ; Yi, J. F. 2 ; Liu, W. C. 2 ; Zhao, J. H. 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Yangtze River Fisheries Res Inst, Jinzhou, Peoples R China
2.Yichang Three Rivers Fishery LTD, Yichang, Peoples R China
3.Huazhong Agr Univ, Fishery Coll, Wuhan, Peoples R China
期刊名称：JOURNAL OF APPLIED ICHTHYOLOGY （ 影响因子：0.892； 五年影响因子：0.956 ）
ISSN： 0175-8659
年卷期： 2011 年 27 卷 2 期
页码：
收录情况： SCI
摘要： The effects of stocking density (15, 30, 45, and 60 fish m(-2)) on the production economics, growth, food utilization, and body composition of Amur sturgeon reared in cages were investigated. The weight of the fish at the start of trial was 48.7-51.6 g. After 75 days of rearing, the mean weights were 110.3 +/- 11.2, 90.3 +/- 10.2, 79.9 +/- 8.5, 78.7 +/- 7.2 g in the aforementioned densities, respectively. The results show that the growth performances in the various treatments differed significantly (P < 0.05) in terms of final weight and condition factor. The feed conversion rate of 15 fish m(-2) treatment was highest at 1.41, compared with 2.04, 2.08, and 3.13 in other densities. Body protein and fat decreased with the increasing density, while moisture increased (P < 0.05). Final biomasses were 32.3, 49.2, 67.3, and 76.9 kg per cage (cage size: 4 x 5 x 3 m), and benefit-cost ratios were 0.39, 0.22, 0.19, and 0.06, respectively. These results indicate that cage farming of Amur sturgeon stocked at a lower density (15 fish m(-2)) did not achieve higher production, but production economics revealed that it provided the highest benefit-cost ratio.
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