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Neither the age (average 74.3 ± 2.9 days) nor the arrival weight of males and females (average 15.38 ± 0.25 kg) at the fattening farm, after the lactation period, were statistically significant. At the end of the fattening period, statistically significant differences were found for the weights and growth of the two sexes (25.91 ± 0.59 kg vs. 22.52 ± 0.52 kg (p-value: 0.000), and 242.15 ± 10.15 g/day vs. 178.51 ± 9.86 g/day (p-value: 0.006) in males and females respectively). Regarding carcass conformation measurements, the differences between sexes were statistically significant for: K, G and Th, but not F. In the carcass performance, there were significant differences between males (7.5 ± 0.3) vs. females (6.7 ± 0.2) (p-value: 0.023), which means that the males had a rating of R- and the females O+. Regarding tissue composition, only the percentage of muscle was significantly higher in males (58.50 ± 0.88) than in females (52.94 ± 0.76), (p-value: 0.011). After the logical differences between males and females, the study showed that both sexes had a higher growth potential than the final weights at which the study was carried out, since they did not show a high fattening (22.76 ± 0.86 percentage). Our results were in accordance with other authors. This research has been financed by a collaboration agreement between the Agricultural Technological Institute of Castilla and León (ITA- CYL), the University of Valladolid (UVa) and the Scientific Park Foundation of the UVa and the project AGL2016-75159-C2-1-R funded by the Spanish State Research Agency (AEI) and the European Regional Development Fund Light lamb Growth Carcass Merino breed Unpublished

Acknowledgements and funding to the Analytical Services of UZ. Age Sex Nutritional value Quality Published

El ganado caprino es de gran importancia en España, tanto por censo como por su repercusión en la Producción Final Ganadera. Esta revisión bibliográfica se ha realizado de manera sistemática con los estudios encontrados en revistas científicas sobre cabrito lechal con un peso vivo de menos de 13 kg y alimentado exclusivamente con leche. El peso de la canal de estos cabritos se distribuye en dos grandes grupos, con pesos por encima y por debajo de 5 kg. A ambos pesos de canal, la carne de cabrito lechal se confirma como una fuente de proteína baja en grasa. No se puede concluir que exista una relación lineal del sistema de lactancia o del peso canal con el pH. La carne de cabritos alimentados con leche natural tiene un índice de amarillo más alto que los de la carne de cabritos alimentados con lactoreemplazantes. No se apreció una influencia marcada del peso de la canal ni del sistema de lactación en la dureza, que tuvo un valor medio de 35 N. En líneas generales, la carne de canales de más de 5 kg tuvo menor porcentaje de ácidos grasos saturados y mayor de insaturados, y una ratio n-6/n-3 mayor que la de carne de canales de menos de 5 kg. Hay muy poca información científica sobre la calidad de carne instrumental de los cabritos, por lo que existe un amplio campo de investigación para cubrir la laguna de conocimiento encontrada. Goat production is quite important in Spain having high census and economic impact. This review has been performed systematically with studies about suckling kids with slaughter weight lower than 13 kg and fed exclusively milk. The carcass weight of kids were distributed into two groups, above and below of 5 kg. Kid meat appears as a useful protein source with low fat content. It was found any linear relationship between rearing system or carcass weight with pH. Meat of kids fed maternal milk had greater yellowness index than those fed milk replacers. Toughness was not affected by carcass weight or rearing system and the average value was 35 N. In general, meat of carcasses heavier than 5 kg had less miensaturated and more unsaturated fatty acids, as well a higher n-6/n-3 ratio than meat of carcasses with less than 5 kg. There is few scientific information on the instrumental quality of suckling kid meat. Therefore, there is a wide field of research to cover the absence of knowledge in this topic.

En las razas caprinas de aptitud lechera, el cabrito es considerado en muchas ocasiones como un subproducto, por lo que frecuentemente se separa de la madre y se alimenta con leche artificial. Este manejo posibilita la utilización de la leche en la fabricaci6n de quesos con un elevado valor añadido, reduce los costes de alimentaci6n y permite obtener buenos crecimientos. Sin embargo, algunos ganaderos prefieren alimentar a los cabritos con leche natural porque creen que esto incrementa la calidad de la carne.