The objective of this work was to evaluate the supplementation of ewes 30 days before lambing, of the weaning age (45 or 60 days) of lambs and of the finishing system (on confinement - full diet or hay) or in grass on the profile of Tríceps brachii muscle fatty acid of no castrated male lambs. The animals were slaughter with 30 kg body weight or at 150 days-old. The lambs finished on confinement fed were slaughtered by age and the others by body weight. The content of fatty acids C15:0, C16:0, C17:0, C16:1, C18:1 and C18:3 were different among the lambs finishing systems. The muscle of lambs fed full diet shown highest values of C16:0, C16:1 and C18:1, while the muscle those fed hay or grass shown highest values of C18:3. The diet affected the fatty acid profile of muscle of lambs. The ewes supplementation 30 days before lambing and the weaning age did not affect the fatty acid profile.
confinement; weaning; ovine; grass; supplementation
