El objetivo de este estudio es caracterizar fenotípicamente dos razas de cabras indígenas en el área de Laghouat (Argelia), y evaluar el efecto de la edad y el sexo sobre las características biométricas morfológicas. Se analizarón un total de 312 animales: 58 hembras de raza Mekatia y 254 de raza Arabia (44 machos y 210 hembras). Los resultados muestran que la raza Mekatia se caracteriza por el pelo corto (96.55%) mientras que Arabia muestra un pelo largo (100% para los machos, 92.38% para las hembras). La mayor parte de los animales de ambas razas eran multicolores (≥3 colores). Las orejas semi-pendulares fueron las más representadas en Mekatia (48.28%) mientras que en Arabia, las orejas pendulares fueron las dominantes (79.55% y 75.72% en machos y en hembras, respectivamente). Sobre los rasgos cuantitativos, ambas razas se clasifican como grandes. El efecto de la edad se muestra para más de la mitad de las mediciones con un aumento general del tamaño del animal con la edad (p
Milk production and quality are influenced by many factors, including nutrition, management practices and breed. The aim of this study was to determine the effect of farming management system and breed on the milk yield, and fatty acid composition of the milk from 50 confinement-fed cows that were fed a total mixed ration, and 52 pasture-fed cows grazed together in rangeland. Individual milk samples (N = 102) were collected once in February. Milk from local breed was characterized by a significantly lower milk yield, and somatic cell count, and a higher protein content than the Holstein breed. The fatty acid composition was relatively the same in both breeds. The result showed that farming management system has no significant effect on the milk yield, somatic cell count, and fat contents, while there was a significant effect on protein content and fatty acid composition. The milk of Holstein cows from extensive system was characterized by more favorable fat fractions with significantly lower concentrations of C10:0, C12:0, C14:0, the sum of short and medium chain saturated fatty acids and n-6: n-3 ratio, and also by higher concentration of unsaturated fatty acids and the sum of n-3 than the milk of Holstein from intensive system.
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