15N per 14N ratio and quality control of Iberian pig carcasses
2007
Delgado Huertas, A.; Reyes, E., Consejo Superior de Investigaciones Científicas, Granada (Spain). Estación Experimental del Zaidín | Pedro Sanz, E. de, Universidad de Córdoba (Spain). Escuela Técnica Superior de Ingenieros Agrónomos y de Montes, Departamento de Producción Animal | García Olmo, J., Universidad de Córdoba (Spain). Servicio Central de Apoyo a la Investigación
The aim of this study is to evaluate the possible use of the 15N per 14N index as a means of determining the feeding regime of Iberian pigs. Two batches of Iberian pigs (B1 and B2) were fed on fallen acorns and fodder (montanera) during their final fattening stage and two batches (C1 and C2) ate only commercial feed. The feed consumed by batch C2 was a special feed, designed to achieve a fatty acid profile similar to that produced when the animals eat acorns (bellota). The 15N/14N isotope ratio was determined in each animal, in loin samples in addition to the fatty acid content in samples of subcutaneous fat taken from the animals' hindquarters. According to the Official Sales Contract of Iberian pigs (OSC), the batches were classified as "Recebo" (B1 and C2), "Bellota" (B2) and "Cebo" (C1). The delta15 N isotope values enables the groups of animals to be classified according to their feeding regime, including the two batches fed on commercial feed
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