Body composition in fishes: body size matters

被引:65
作者
Breck, James E. [1 ,2 ]
机构
[1] Fisheries Res Inst, Michigan Dept Nat Resources, Ann Arbor, MI 48109 USA
[2] Univ Michigan, Ann Arbor, MI 48109 USA
关键词
Proximate body composition; Body size; Allometry; Protein; Lipid; PROXIMATE COMPOSITION; ENERGY CONTENT; ONCORHYNCHUS-NERKA; ATLANTIC SALMON; COHO SALMON; FOOD-INTAKE; TEMPERATURE; GROWTH; AGE; NUTRIENT;
D O I
10.1016/j.aquaculture.2014.05.049
中图分类号
S9 [水产、渔业];
学科分类号
0908 ;
摘要
Fish proximate body composition is of great interest in aquaculture because it affects fish appetite, growth and the efficiency of food utilization. Proximate body composition also affects other aspects of fish biology and ecology, including reproduction, survival, and energy value to predators. Two very strong relationships among body components are revealed by taking into account fish body size in terms of water mass. There is a very strong relationship between water mass and protein mass, with the amount of water per unit protein decreasing in larger fish. The strength of this relationship and its presence in a variety of fish species suggest a physiological or biochemical cause. Similarly, there is a very strong relationship between water mass and ash mass, with the amount of water per unit ash decreasing in larger fish. These two strong relationships enable fish body composition to be predicted from wet weight and percent water. Calculated water mass is used to predict mass of protein and ash, then lipid mass is found by subtraction of water, protein, and ash from body mass. Results from this approach suggest that there is virtually no functional relationship between body lipid and body water. Fish energy density can be calculated from proximate composition. These relationships should be useful in studying fish bioenergetics and other aspects of fish growth. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码:40 / 49
页数:10
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