Resumo

PITA, M.C.G.; PIBER NETO, E.; CARVALHO, P.R.  e  MENDONCA JUNIOR, C.X.. Effect of dietary supplementation of flaxseed, canola oil and vitamin E upon polyunsaturated fatty acids in chicken eggs. Arq. Bras. Med. Vet. Zootec. [online]. 2006, vol.58, n.5, pp. 925-931. ISSN 0102-0935.  http://dx.doi.org/10.1590/S0102-09352006000500031.

The effect of dietary sources of polyunsaturated fatty acids - canola oil and flaxseed - with different vitamin E supplementation on the fatty acid deposition into the eggs of 288 Babcock laying hens was investigated. Birds were fed diets containing 6% of canola oil, 20% of flaxseed or a combination of 3% of canola oil and 10% of flaxseed, enriched with 0, 100 or 200Ul of dl-a-tocopheril acetate. The inclusion of flaxseed in the diets increased the yolk polyunsaturated fatty acids, mainly a-linolenic acid and EPA (eicosapentaenoic acid). The concentration of a-tocopherol in the diet did not change the egg yolk, fatty acids deposition but changed the saturated fatty acids deposition.

Palavras-chave : polyunsaturated; canola; flaxseed; yolk; vitamin E.