Components Soybean Niger seed Linseed Dry matter 78.0 ±2.6a 70.7 ±3.0b 59.0 ±0.5c Crude protein 87.9 ±3.2a 72.6 ±2.0b 62.4 ±4.2c Crude lipid 81.4 ±2.2a 78.9 ±2.8a 79.4 ±3.0a Gross energy (kJ g-1) 86.0 ±2.5a 72.9 ±1.8b 53.7 ±3.5c Digestibleprotein 36.9 25.3 21.3 Digestible energy 17.7 14.2 11.0

Table 4: Apparent digestibility coefficients (%) of protein, lipid, dry matter, energy and digestible protein and energy (g kg-1 and kJ g-1 respectively, dry weight basis) in the test ingredients for Nile tilapia. Coefficients in each row with a different letter are significantly different (P<0.05).