Regulation of feed intake, growth, nutrient and energy utilisation in European sea bass (Dicentrarchus labrax) fed high fat diets

被引:170
作者
Boujard, T
Gélineau, A
Covès, D
Corraze, G
Dutto, G
Gasset, E
Kaushik, S
机构
[1] IFREMER, Stn Expt Aquaculture, Lab Rech Piscicole Mediterraneee, F-34250 Palavas Les Flots, France
[2] INRA, Stn Hydrobiol, IFREMER, Unite Mixte,Lab Nutr Poissons, F-64310 St Pee Sur Nivelle, France
关键词
Dicentrarchus labrax; European sea bass; digestible energy; lipid; feed intake; phosphorus excretion;
D O I
10.1016/j.aquaculture.2003.11.010
中图分类号
S9 [水产、渔业];
学科分类号
0908 ;
摘要
Three practical isoproteic (54% protein) diets were formulated to contain graded levels of crude fat (diet L: 10%, diet M: 20% and diet H: 30%). Each diet was assigned unrestrictedly to three and restrictedly to two replicate groups of fish (IBW 243 g). In unrestricted groups, increasing the dietary lipid level led to a significant decrease in voluntary feed intake without affecting growth rate. In the feed-restricted groups, daily growth rates increased with increasing dietary fat levels. There was a significant and inverse effect of the dietary fat content on whole body moisture and fat levels, with highest lipid (ca. 20%) and lowest moisture (ca. 58%) contents in sea bass fed diet containing the highest lipid level; muscle lipid concentration was however not affected. Nitrogen retention was significantly increased by an increase in lipid concentration in the diets, with better efficiencies observed in unrestricted (ca. 31%) than in restricted groups (ca. 27%). Nitrogen loss was significantly affected by both the feeding level and the diet composition, with lowest values (ca. 60 g kg(-1)) in groups fed diet H unrestrictedly and highest values (ca. 90 g kg(-1)) in groups fed diet L at a restricted level. Soluble phosphorus excretion in H groups was less than half that in L groups, regardless of the feeding level. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:529 / 545
页数:17
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