Abstract
The effect of two different rearing systems of goats such as grown under confinement and raising on field was evaluated for muscles of intact male goat. The physico-chemical properties such as pH and water activity (Aw), and chemical composition including moisture, protein, ash, calcium, iron, phosphorus, cholesterol, phospholipids and fatty acids were determined. The rearing system had no significant effect on protein content and water activity. Concentrations of ash and fat were significantly (P < 0.05) different, being higher in goats raised under confinement, while goats raised in field had higher percentage of moisture and phospholipids. However, pH, iron, phosphorus, cholesterol contents were significantly higher for animals raised under confinement. The predominant fatty acid in goat meat in both rearing systems was oleic (C18:1), which ranged from 36.23 to 43.56 %. Higher contents of saturated fatty acids (SFA) and lower contents of monounsaturated fatty acids (MUFA) were found significantly (P ≤ 0.05) different in goats raised on field. This resulted in a greater ratio of unsaturated fatty acids (UFA) and SFA and that of MUFA and SFA in goat meat of animals raised under confinement as compared to that of the goats raised on the field. Resumen Se evaluó el efecto de dos sistemas de cría de cabras diferentes, tales como el crecimiento en confinamiento y el crecimiento en campo abierto, sobre el músculo de cabras macho. Se determinaron propiedades físico-químicas como el pH y actividad de agua (Aw) y composición química incluyendo humedad, proteína, cenizas, calcio, hierro, fósforo, colesterol, fosfolípidos y ácidos grasos. El sistema de cría no tuvo un efecto significativo sobre el contenido en proteina y Aw. Los contenidos de cenizas y grasa fueron significativamente diferentes (P < 0,05), siendo mayor en cabras crecidas en confinamiento, mientras que las cabras crecidas en campo abierto tuvieron mayor contenido en humedad y fosfolípidos. Sin embargo, el pH y el contenido de hierro, fósforo y colesterol fueron significativamente mayores en los animales crecidos en confinamiento. El ácido graso predominante en la carne de cabra en ambos sistemas de cría fue acido oleico (C18:1), el cual estuvo en el intervalo 36,23 a 43,56 %. Se encontró un mayor contenido de ácidos grasos saturados (SFA) y menor contenido de monoinsaturados (MUFA) en función del sistema de cría. Se observó una mayor proporción de ácidos grasos insaturados (UFA) y SFA y que los MUFA y SFA en carne de cabra crecida bajo confinamiento comparados con los crecidos en campo abierto. Palabras clave: Cabra, carne, confinamiento, crí, composición, química, caracterización físico-química
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