Effect of feeding diets high in monounsaturated fatty acids and α-tocopheryl acetate to rabbits on resulting carcass fatty acid profile and lipid oxidation

摘要: The effects of olive (MONO) or sunflower (POLY) oil-enriched (30 g/kg) diets with either a basal (10 mg/kg food) supplemented (200 mg/kg) level a-tocopheryl acetate on some measures production, fatty acid composition animal tissues and susceptibility to oxidation rabbit meat membrane extracts have been studied. MONO diet produced higher levels C18:1 in tissues. Animals that received POLY had C18:2 perirenal neutral fraction intramuscular fat C18:2, C20:4, C22:4 C22:5 phospholipid, reaching overall unsaturation (P = 0·001). Muscle samples from rabbits given the were more susceptible lipid 0·0001). Differences oxidation, between groups followed similar pattern meat. Diets rich resulted increases concentration pentanal < 0·001), hexanal 0·0001) total volatile aldehydes as monitored by headspace gas liquid chromatography. Dietary supplementation α-tocopheryl reduced 0·05), particularly 0·05). administration monounsaturated acids not only reduces but also modifies relative proportion generated upon heating, specific decrease those generally related rancidity off-flavour meats.