Composition of intramuscular fatty acids from sheep living in Steppe zones, TIARET region, ALGERIA

摘要

The effect of two distributed diets (pasture in steppe rangelands and a diet based on barley concentrate) on intramuscular lipid composition was studied in sheep. Some samples of the "Biceps femoris" ovine muscles where collected in the spring period (n = 5), and in the winter period (n = 4) from Tiaret local slaughter house.A small difference was observed in the fatty acid profile analyzes, which is probably related to the phenomenon of remanence where sample collection began at the beginning of the seasons, which influenced the intramuscular lipid fraction, which appears to be approximate in the meat of these sheep. C18: 2n6 had the highest content, followed by C20: 4n6 (P <0.001), while there was no significance for the PFA / SFA ratios (0.272 vs 0.339) (P <0.001) and just as many Σn6 / Σn3 (0.051 vs 0.124) for both periods (P <0.001). Discriminatory analysis of intramuscular fatty acids shows that despite the limited effect of these sheep under both regimes, which are characterized by a similar fatty acid profile, their meats are suitable at desirable stages, which is why is in favor of a certain reduction in the risk of having certain health problems in humans. This makes sheep farming on steppe rangelands beneficial, in favor of quality meat production, which meets the demand. It should be noted that even for concentrate feeding, these sheep presented properties more or less similar to each other.