Nutritional value of animal by-product meal in practical diets for Nile tilapia Oreochromis niloticus (L.) fry |
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| Authors: | M Rodríguez-Serna M A Olvera-Novoa C Carmona-Osalde |
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| Institution: | Centro de Investigatión y de Estudios Avanzados del Instituto Politecnico Nacional, Unidad Mérida (CNVESTAV-IPN), Mérida, Yucatán, Mexico |
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| Abstract: | Animal by-product meals (ABM) were substituted for fish meal in five experimental diets for Nile tilapia fry, Oreochromis niloticus (L), with 25%, 50%, 75% and 100% substitution. Two diets with 100% ABM were tested, one with 50:50 animal lipid:soybean oil, and the other with 100% fish oil as attractant. In general, the best growth and feeding performance was obtained with a control diet based on fish meal as the sole protein, but the results were not statistically different from those obtained with 75% and 100% ABM with soybean oil. A simple cost analysis suggested better economic efficiency when tilapia were fed with 100% ABM. It was concluded that animal by-product meal can be used as a sole protein source in commercial diets for Nile tilapia fry, without affecting growth and food utilization of the fish, improving the economics of feeding in comparison with fish meal. |
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