Ingredient S0 (0%) S1 (25%) S2 (50%) S3 (75%) S5 (100%) S3 D Fish meal (66.46%) 54.29 45.38 34.16 19.62 - 19.83 Soyabean meal (full fat, 42.93%) - 15.13 34.16 58.85 92.15 59.48 Maize (10.24%) 41.71 35.50 27.68 17.54 3.87 16.69 Vit. Min Mix# 0.50 0.50 0.50 0.50 0.50 0.50 Fish oil 1.00 1.00 1.00 1.00 1.00 1.00 CaCO3 0.50 0.50 0.50 0.50 0.50 0.50 Salt 0.50 0.50 0.50 0.50 0.50 0.50 Chromic oxide 0.50 0.50 0.50 0.50 0.50 0.50 Cellulose* 0.20 0.20 0.20 0.20 0.20 0.20 Starch 0.80 0.80 0.80 0.80 0.80 0.80 Chemical composition (%)             Phosphorus 1.31 1.15 1.01 0.75 0.43 1.23 Available phosphorus 0.91 0.63 0.44 0.33 0.03   Calcium 1.85 1.64 1.28 0.99 0.68 3.63 Magnesium 0.25 0.24 0.28 0.27 0.27 0.16 Potassium 0.87 1.10 1.35 1.60 1.90 1.53 Zinc 15.82 14.22 12.59 12.12 12.40 17.81 Ca/P ratio 1.41 1.43 1.27 1.30 1.59 2.95 Phytate 0.40 0.52 0.57 0.43 0.40   Native phytase (FTU/g) <100 <100 <100 <100 <100 <100

#Micro mineral mix contains per kilogram: Vit. A (20, 000 IU), Vit. D3 (5, 000 IU), Vit. E (300 mg), Vit K3 (10 mg), Vit. B1 (20 mg), Vit. B2 (25 mg), Vit. C (300 mg), Niacin (120 mg), Ca Pantothenate (60 mg), Vit. B6 (10 mg), Vit. B12 (0.05), Folic acid (5 mg), Biotin (1 mg), Choline chloride (5 mg), Inositol (50 mg), Manganese (30 mg), Iron (35 mg), Zincn (45 mg), Copper (3 mg), Iodine (5 mg), Cobalt (2 mg), Lysine (85 mg), Selenium (0.15 mg), Antooxidant (80 mg), Methionine (100 mg).

* Ascarboxymethyl cellulose

Table 1: Gross and chemical composition of roasted, full-fat soyabean-basal diets for juvenile Clarias gariepinus.