Comportamiento productivo y niveles de ácidos grasos en la canal de corderos suplementados con Saccharomyces cerevisiae

Saturated fatty acids (FA) in the carcass of ruminants represent a critical topic in human alimentation given by their relationship with cardiovascular diseases. In view of this, Saccharomyces cerevisiae (Sc) represents an alternative to modify the meat FA profile by increasing the ratio of deposited unsaturated FA, because of its high levels of unsaturated fatty acids. An experiment was carried out using 30 commercial growing lambs (20 ± 0.9 kg LW), distributed into three groups with 10 animals each, which was placed into one of three evaluated treatments: 0, 3, and 5g Sc animal-1 d-1, in order to determine the productive performance of the animals, plasmatic cholesterol levels, and FA deposited in the carcass. A totally random design was used. Data were analyzed using the PROC GLM, considering ten repetitions per treatment. Mean comparison of the treatments was done through the Tukey test. The results show that adding 3g animal-1 d-1 Sc partially decreased (p 0.05) daily weight gain. It also did not affect (p > 0.05) muscle area of the Longissimus dorsi, fat thickness and total cholesterol in the blood. As the Sc dose increased, the levels of myristic, palmitic, oleic, and linoleic acids decreased (p 0.05) la ganancia diaria de peso. Tampoco afectó (p > 0.05) el área del músculo Longissimus dorsi, espesor de grasa dorsal y colesterol total en sangre. Al incrementar la dosis de Sc, disminuyó (p < 0.05) el nivel de ácido mirístico, palmítico, oleico y linoleico. Se no afecta el comportamiento productivo del animal, tampoco mejora el perfil de AG insaturados en la canal; sin embargo, disminuye las concentraciones de AG saturados