Formulation, ingredient composition and analyzed nutrient content of experimental diets.

1HP/EF - High P/E ratio diet with fat as main non-protein energy source; HP/EC - High P/E ratio diet with carbohydrate as main non-protein energy source; LP/EF - Low P/E ratio diet with fat as main non-protein energy source; LP/EC - Low P/E ratio diet with carbohydrate as main non-protein energy source.2Protein mixture (% mixture): 50% fishmeal (Sopropêche 56100 Lorient, France), 16.5% soybean protein concentrate (Sopropêche 56100 Lorient, France), 16.5% pea protein concentrate (Roquette 62080 Lestrem, France), 16.5% wheat gluten (Roquette 62080 Lestrem, France) and 0.5% DL methionine (Ajinomoto Eurolysine 75017 Paris, France).3Oils: rapeseed oil (Daudruy 59640 Dunkerque, France) in HP/E diets; 5% (% diet) fish oil (Sopropêche 56100 Lorient, France) and the remaining part from rapeseed oil in LP/E diets.4Gelatinized maize starch: Roquette 62080 Lestrem, France.5Cellulose: Rettenmeier et Sohne 73494 Rosenberg, Germany.6Other (% diet): 2% Diamol (indigestible marker, Diamol GM, Franz Bertram Hamburg, Germany); 1% vitamin and mineral premix (INRA UPAE 78200 Jouy en Josas). For LP/E-diets 0.4% CaCO3, 1.8% Ca(HPO4)2, and 0.5% Na2CO3 were added.7Calculated as, total carbohydrates (starch, free sugars, cellulose) = 1000−(crude protein+crude fat+ash).8DP/DE (Digestible protein to digestible energy ratio) = (Crude protein×% apparent digestibility coefficient of crude protein)/(gross energy×% apparent digestibility coefficient of gross energy- see table 4).