PERFIL LIPÍDICO DA CARNE DE BOVINOS SINDI SUBMETIDOS À NÍVEIS DE RESTRIÇÃO ALIMENTAR.

Abstract

To determine the effect of dietary restriction on lipid profile of male bovine meat Sindi in confinement, 32 animals were used (mean age 21 ± 1.5 months, average initial body weight of 257.5 ± 20 kg) in a completely randomized design with 4 treatments and 8 repetitions. Four restrict levels were tested (0, 15, 30 and 45%). Feed restriction did not affect (P> 0.05) the percentage of saturated fatty acids caproic, capric, lauric, pentadecanoic, heptadecanoic, stearic, nanodecanoico, heneicosanoico, tricosanoic and total saturated fatty acids (ΣAGS) Longissimus dorsi. However, myristic and palmitic acids, linear decrease (P <0.05). The arachidic and behenic acids increased linearly with the increase of feed restriction level. There was a significant effect for myristoleic and palmitoleic, which linearly decreased with increasing levels of restriction. As for polyunsaturated fatty acids, there was no effect (P> 0.05) in linoleic acids, γ - linolenic, eicosadienoic, eicosatrienoic and arachidonic. On the other hand, the fatty acid α - linolenic acid and docosahexaenoic (DHA) increased linearly with 0.0036% and 0.0068%, respectively, for each percentage point increase restriction. The restriction affected (P <0.05) the sum of the percentages of polyunsaturated fatty acids (ΣAGP) which increased by 0.0753% increased for each restriction unit. The total percentage of omega-6 family (ω-6) increased linearly with the increase of feed restriction levels. On the other hand, there was no effect (P> 0.05) in the total percentage of omega-3 family of acids (ω-3) and in relation ω6: ω3. Feed restriction did not significantly influence the relationship between monounsaturated and saturated fatty acids. Since the polyunsaturated relationship: saturated linearly increased with increasing level of restriction. The ratio of unsaturated fatty acids: saturated did not differ (P> 0.05) between treatments. Rates of atherogenicity (IA) and thrombogenicity (IT) decreased linearly as it increased the level of restriction. Treatment effect was also observed in relation to the ratio hypocholesterolemic hypercholesterolemic fatty acids (H / H) increases linearly with increasing dietary restriction level.