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Fatty acid composition of Verata goat kids fed either goat milk or commercial milk replacer

1994; Elsevier BV; Volume: 14; Issue: 1 Linguagem: Espanhol

10.1016/0921-4488(94)90011-6

1879-0941

Adrián Rojas, C.J. López-Bote, Aldo Rota, Lourdes Martín, Pablo Rodríguez, J. Tovar,

Lipid metabolism and biosynthesis

Fatty acid composition of perirenal fat of young Verata male and female kids fed with natural milk and with three concentrations of commercial milk replacer was studied. There was no effect associated with sex. In each gender the only statistical difference in fatty acid composition between the four feeding groups under study were pentadecanoic acid (C15:0), heptadecanoic acid (C17:0) and heptadecenoic acid (C17:1) which were higher in all cases in naturally fed kids (P < 0.05). The origin of odd-numbered fatty acids in depot fats of goat kids is discussed considering the possible role of microbial rumen synthesis in goat kids or the direct incorporation from the milk (or milk replacer) fat. The relatively low stearic concentration in perirenal fat in all groups (around 15%) suggest low ruminal activity. Determination of C15:0, C17:0 and C17:1 in perirenal fat could help differentiate the feeding system of young kids and might be useful for identification purposes of goat kid carcasses. Se ha estudiado la composición en ácidos grasos de la grasa perirenal de cabritos de raza Verata alimentados con leche natural o con tres concentraciones de lactorremplazantes. No se han encontrado efectos asociados al sexo. La única diferencia se encontró en los ácidos pentadecanoico (C15:0), heptadecanoico (C17:0) y heptadecenoico (C17:1), que alcanzaron valores más elevados en animales de lactancia natural (P < 0,05). En el trabajo se discute el posible origen de estos ácidos grasos, considerando el posible papel de los microorganismos del rumen o la incorporación directa a través de la grasa de la leche. La baja concentración de ácido esteárico (alrededor del 15%) hace suponer una baja actividad ruminal. La determinación de ácidos grasos impares puede permitir identificar el tipo de alimentación suministrada a los cabritos.