Constraints on energy intake in fish: the link between diet composition, energy metabolism, and energy intake in rainbow trout.

Results Feed intake and growth Feed intake (in g fish −1 d −1 , g DM fish −1 d −1 , % d −1 , and g DM kg −0.8 d −1 ), growth (in g d −1 and g kg −0.8 d −1 ), and feed gain ratio (FGR) were significantly affected by the P/E ratio and by the NPE source of the diet with a highly significant interaction between both factors ( Table 2 ).

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