Animal-protein-free feeds for hybrid tilapia (Oreochromis niloticus×O. aureus) in intensive culture.
Growth trials were carried out with tilapia in experimental ponds to develop an animal-protein-free diet of nutritive value equal to a standard commercial fish-meal feed. A diet based on soyabean meal and supplemented with amino acids, oil and dicalcium phosphate resulted in growth performances and body compositions equal to those on a fish-meal diet. Successive withdrawal of the supplements resulted in a final fish-meal-free diet, with 3% dicalcium phosphate and 2% oil as the only supplements necessary to achieve growth performances equal to those obtained with a fully supplemented diet.