constraints on energy intake in fish the link between diet composition, energy metabolism, and energy intake in rainbow trout限制能量摄入鱼类的饮食成分之间的联系,能量代谢,能量摄入彩虹鳟鱼.pdfVIP

constraints on energy intake in fish the link between diet composition, energy metabolism, and energy intake in rainbow trout限制能量摄入鱼类的饮食成分之间的联系,能量代谢,能量摄入彩虹鳟鱼.pdf

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constraints on energy intake in fish the link between diet composition, energy metabolism, and energy intake in rainbow trout限制能量摄入鱼类的饮食成分之间的联系,能量代谢,能量摄入彩虹鳟鱼

Constraints on Energy Intake in Fish: The Link between Diet Composition, Energy Metabolism, and Energy Intake in Rainbow Trout 1,2 1 2 2 Subramanian Saravanan , Johan W. Schrama , A. Claudia Figueiredo-Silva , Sadasivam J. Kaushik , 1 2 Johan A. J. Verreth , Inge Geurden * 1 Aquaculture and Fisheries Group, Wageningen Institute of Animal Sciences (WIAS), Wageningen University, Wageningen, The Netherlands, 2 Institut National de la ˆ ´ Recherche Agronomique (INRA), UR1067, Nutrition, Metabolism and Aquaculture (NuMeA), Pole d’Hydrobiologie INRA, Saint Pee-sur-Nivelle, France Abstract The hypothesis was tested that fish fed to satiation with iso-energetic diets differing in macronutrient composition will have different digestible energy intakes (DEI) but similar total heat production. Four iso-energetic diets (2 62 factorial design) were formulated having a contrast in i) the ratio of protein to energy (P/E): high (HP/E) vs. low (LP/E) and ii) the type of non- protein energy (NPE) source: fat vs. carbohydrate which were iso-energetically exchanged. Triplicate groups (35 fish/tank) of rainbow trout were hand-fed each diet twice daily to satiation for 6 weeks under non-limiting water oxygen conditions. Feed intake (FI), DEI (kJ kg20.8 d21) and growth (g kg20.8 d21) of trout were affected by the interaction between P/E ratio and NPE source of the diet (P,0.05). Regardless of dietary P/E ratio, the inclusion of carbohydrate compared to fat as main NPE source reduced DEI and growth of trout by ,20%. The diet-induced differences in FI

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