Resumen

NAVARRO, R.D. et al. Performance of tilapia (Oreochromis niloticus) supplemented with vitamin E. Arch. zootec. [online]. 2010, vol.59, n.226, pp.185-194. ISSN 1885-4494.

The effect of vitamin E supplementation on performance and carcass quality of Nile tilapia (Oreochromis niloticus). The research was carried out in the experimental frog raising facilities at the Department of Animal Biology, UFV, Minas Gerais state, Brazil. Four hundred post larva reversed (Oreochromis niloticus) were used for studies. The experiments were randomly designed with five treatments (supplying 0, 50, 100, 150, and 200 mg/kg of vitamin E mono-phosphate) in an isoproteic ration with 36% CP and isocaloric with 3600 kcal/kg of DE with four repetitions. It was not observed significant effect for final weight, total weight gain, daily weight gain, protein efficiency rate and survivor rate. The viscerosomatic index showed significant differences for the treatment without vitamin E supplementation and with 100 and 150 mg of this vitamin. For oleic fatty acid, the treatment without vitamin E was significantly higher. The eicosapen-taenoic fatty acid (C20:5ω3) was statistically significant for the treatment without vitamin E. The fatty acids linoleic (C18:2ω6), γ-linolenic (C18:3ω6), α-linoleic (C18:3ω3), and arachidonic (C20:4ω6) increased in a quadratic way up to the estimated levels of 110 mg, 111mg, 113 mg, and 140 mg of vitamin E/kg of ration, respectively.

Palabras clave : Nutritional requirement; Fatty acids; Nutrition of fish.

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