Diets   Ingredients PBM0 PBM50 PBM75 PBM100 Fish meal 200 100 50 - Poultry by-product meal - 150 200 260 Soybean meal 150 130 150 150 Corn gluten meal 110 100 100 100 Wheat brain 200 200 200 2100 Yellow corn maize 260 240 220 200 Fish oil 30 30 30 30 Sunfloweroil 30 30 30 30 Vitaminand mineral mix1 15 15 15 15  Chromic oxide  5 5 5 5 Proximate analysis (n=3)         Dry matter 928 922 924 926 Crude protein 301.9 301 301.8 300 Ether extract 110.4 115.9 116.6 118.8 Nitrogen free extract 453.9 451.3 449.2 447.8 Crude fiber 45.8 46.8 50.4 49.4 Crude ash 88 85 82 84 Gross energy (MJ kg-1diet)2 19.58 19.74 19.75 19.77 ME (MJ kg-1diet)3 16.31 16.44 16.46 16.49

1Vitamin-mineral premix, mg Kg-1 dry diets: vitamin A (as acetate), 7500 Iu kg-1 dry diet, Vitamin D3 (as cholecalcipherol); 6000IU kg-1 dry diet, vitamine E (as DL-Ltocopheryl- acetate); 150 IU kg-1 dry diet, vitamin k (as menadione Na-bisulphate); 0.06 ascorbic acid (as ascorbyle polyphosphate), 150 D-biotin, 42 choline (as chloride) 3000; folic acid, 3 niacin (as nicotinic acid), 30 pantothenic acid, 60 pyridoxine, 15; ribflavine, 0.06; manganese sulphate, 0.18; potassium iodide, 0.02 zinc sulphate. 2 Schulz et al. [36]. 3Jobling [37].

Table 3: Formulation and approximate composition of experimental diets (g kg-1).