Efecto de una dieta rica en ácidos grasos monoinsaturados sobre el peso vivo, el espesor de grasa dorsal y la profundidad de lomo en cerdos de alto y medio crecimiento magro
Resumen
El objetivo de este estudio consistió en evaluar si administrar una dieta rica en ácido oleico en cerdos de engorde ejercía algún efecto sobre la ganancia de peso, el espesor de grasa dorsal y la profundidad del músculo Longissimus thoracis. Ciento noventa y dos machos castrados y hembras de los genotipos (Landrace*Large White)*Pietrain y (Landrace*Large White)*York recibieron una dieta de cereales y soja (CONTROL con 28% C18:1) o una dieta similar rica en ácido oleico (HO con 43% C18:1, Greedy-Grass OLIVA®). Los cerdos se alojaron en 16 corrales en grupos de 12, según su dieta, sexo y genotipo. A partir de los 75 días de vida, y a continuación cada tres semanas, los animales se pesaron y se midió mediante ultrasonidos (PIGLOG®) el espesor de grasa dorsal y la profundidad de lomo. No se detectaron diferencias en la ganancia media diaria ni en el espesor de grasa dorsal y lomo entre los cerdos alimentados con dieta HO y dieta CONTROL. En cambio, los machos castrados presentaron un mayor peso vivo y un mayor espesor de grasa dorsal que las hembras. Estas, en cambio presentaron una mayor profundidad de lomo. Los cerdos cruzados con York fueron más pesados durante toda la prueba y presentaron un mayor espesor de grasa dorsal que los cruzados con Pietrain. Los animales del genotipo Pietrain presentaron una mayor profundidad de lomo durante las dos últimas mediciones. Los resultados de este estudio muestran que el uso de grasas altas en ácido oleico para modificar el perfil de ácidos grasos de la carne no perjudica los resultados productivos de los animales que toman dichas dietas.Descargas
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