| Sumario: | Meat and bone meal (MBM) and poultry byproduct meal (PBM) are logical candidates for substitutingfish meal in diets for carnivorous and omnivorous aquacultural species, for reasons of product of animalorigin, nutritional composition, and price and supply advantages over fish meal (FM). Evaluation foreffectiveness of substitution should be largely based on matching of digestible amino acids content andthe requirement of the target species, and the growth performance from the feeding trials.Supplementation of crystalline amino acids is recommended when amino acids imbalance has arised.Results of most feeding trials indicate that replacement of FM with MBM and PBM has minimal effecton feed consumption, survival rate, carcass composition and taste characteristics for white shrimp,tilapia and trout. Optimum FM replacement rates for MBM and PBM in shrimp, tilapia and trout dietsare 50, 60, 50% for MBM, and 70, 80, 80% for PBM. The recommended inclusion rates of MBM andPBM in shrimp, tilapia and trout are 15-20, 6, 20% for MBM, and 18-25, 8, 25% for PBM. Diets mustbe formulated with sufficient essential fatty acids.
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