| Sumario: |
The amino acid profile of Colossoma macropomum was determined. Indispensable amino acid levels were sim ilar to those reported in other fish species. Suitability
of local. Costa Rican, ingredients as protein sources
for C. macropomum was evaluated based on their pro tein content and indispensable amino acid profile. It was calculated that, in a standard diet (40% protein,
25% fish meal), blood meal, soya meal, poultry by products, meat and bone meal, and meat meal can
substitute more than 80% of the fish meal. More than
40% of the fish meal can be substituted by shrimp
meal, pigeon pea, cotton meal, peanut oU cake, cow
pea, corn gluten and water hyacinth. As differences
between amino acid profiles between fish species
seem to be small, promising alternative ingredients
for C. macropomum might be equally interesting for
formulation of feeds for other species. Soya meal is thecurrently used ingredient with the highest potential
to substitute fish meal completely. Further research is
needed to determine if the use of alternative ingredients is limited by constraints such as decreased feed digesti bility, presence of anti-nutritional factors, additional production and processing costs.
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