Meat fatty acids profile of kid goats from Serpentina breed I – Introduction
2009
Belo, A T | Pereira, M S | Babo, H | Belo, C C
The paper refers to the fatty acids (FA) profile of intramuscular fat in three muscle sites: longissimus dorsi (LD), leg, shoulder and the FA profile of perirenal fat (PRF). Kid goats were raised on three farms with distinct feeding management (1, 2 and 3) and slaughtered in December, at 10-12 kg live weight. From farm 3, intramuscular fat and PRF FA profile of kid goats slaughtered in April were compared to those from December. All goats grazed natural pastures and only goats and kids raised on farms 1 and 2 were supplemented. The saturated fatty acids (S) content was higher in PRF while the intramuscular fat of the different muscle samples showed a similar concentration of polyunsaturated fatty acids (P). Meat from kids raised on farm 3 and slaughtered in December was richer in conjugated linoleic acids, C18:2 cis9,trans11 (CLA) and in n-3 polyunsaturated fatty acids, with a dietetic advantage due to a lower n-6/n-3 fatty acids ratio. This result shows the advantage of a feeding system based only on pasture. Spring raised kids showed the same advantages in the FA profile: n-6/n-3 fatty acids ratio decreased from 2.25 to 1.60 and CLA increased from 0.45 to 0.66%, suggesting the higher quality of pastures during spring. A discriminant analysis using the FA profile of intramuscular fat of LD allowed the identification of the different feeding systems
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