Diets Ingredients (%) 100% Fish oil 50:50 (Fish:Plant) 100% Plant oil Fish meal 50 50 50 Fish oil1 8 4 0 Plant oil2 0 4 8 Raw corn starch 18 18 18 White dextrin 0 0 0 Mineral premix3 3 3 3 Vitamin premix4 3 3 3 Carboxymethyl cellulose 18 18 18 Relation P/E (mg P/kcal) 84 83 83 Gross Energy (kJ/g)5 358 360 360 Nutrient content (% wet weight) Dry matter 95.18 95.11 95.58 Moisture 4.82 4.89 4.42 Crude protein (nitrogen × 6.25) 31.56 31.93 29.52 Lipid 12.76 10.96 11.82 Ash 14.03 13.92 12.60 Crude fiber 0.29 0.20 0.16 NFE* 36.54 41.09 41.47

*NFE=100-(%moisture+%protein+%lipid+%ash+%fiber) 1Fish oil was bought in Pharmacia Paris 2Plant oil was bought in SAARKA Nutrición y Tecnología, S. A. de C.V. 3g/kg: MgSO4·7H2O, 10.434; KCl, 2.0; NaCl, 2.4; FeSO4·7H2O, 1.0; ZnSO4·7H2O, 0.22; CuSO4·5H2O, 0.0314; MnSO4·H2O, 0.0769; CoSO4·7H2O, 0.0236; CaIO3, 0.0185; CrCl3·6H2O, 0.0051 (SAARKA, Nutrición y Tecnología, S. A. de C.V.) 4g/kg: thiamin, 2.5; riboflavin, 2.5; panthotenicacid, 5.0; niacin, 10.0; pyridoxine, 2.0; biotin, 0.3; folic acid, 0.75; cyanocobalamin, 0.005; myoinositol, 100; ascorbic acid, 50.0; choline, 200; α-tocopherolacetate, 20.1, para-aminobenzoic acid, 2.5; menadione, 2.0; vitamin D3, 0.0125; vitamin A, 0.03 (SAARKA, Nutrición y Tecnología, S. A. de C.V.) 5Calculated using the factors: carbohydrate, 4.1; protein, 5.5 and lipids, 9.1 kcal/

Table 1: Ingredient and proximate composition of experimental diets (g/100 g dry/ diet.