Genotypic and seasonal influences on milk yield and milk composition of sheep and goats in Malawi

agneau analyse statistique birth weight brebis breeds cabra cabrito calidad chevreau contenido proteico cordero crecimiento croissance dry season ewe milk ewes gain de poids ganancia de peso growth kids lactation lait de brebis lambs leche de oveja lipid content methode methods milk yield milking mortalidad mortalite mortality nannygoats oveja performance de reproduction peso al nacimiento protein content quality race razas rendement laitier rendimiento lechero reproductive performance reproductividad saison humide statistical analysis supervivencia survie survival teneur en lipides weight gain wet season