Growth of total fat and lean and of primal cuts is affected by the sex type
Ver/Abrir
Autor/a
Carabús, A.
Sainz, R. D.
Oltjen, J. W.
Gispert, M.
Font-i-Furnols, M.
Fecha de publicación
2017-02-10ISSN
1751-7311
Resumen
Knowledge of tissue and cuts growth depending on the sex could be used to improve performance and efficiency. Computed tomography (CT) is a non-invasive technology that enables the study of the body composition of live animals during growth. The aims of the present study were (1) to evaluate variation in the body composition of four sex types (SEX) of pigs (castrated males (CM), immunocastrated males (IM), entire males (EM) and females (FE)) at the live weight of 30, 70, 100 and 120 kg, assessed using CT; (2) to model the growth of the main tissues and cuts; and (3) to predict the mature BW (MBW) of the four SEX and establish the relationships between the growth models and the MBW. There were significant phenotypic differences in the allometric growth of fat and lean among SEX. For the lean tissue, FE and EM showed higher values of the b coefficient than CM and IM (1.07 and 1.07 v. 1.00 and 1.02, respectively) all of them close to unity, indicating a proportional growth rate similar to live weight and that this tissue developed faster in FE and EM than in CM and IM. However, these differences were not related to differences in estimated MBW. There were significant differences in estimated MBW among SEX, being higher in IM and EM than in CM and FE (303 and 247 v. 219 and 216 kg), however, the MBW may have been overestimated, especially for the IM. The poorer accuracy of the MBW estimate for the IM could be due to a maximum live weight of 120 kg in the experiment, or to the fact that this particular SEX presented two clear behaviours, being more similar to EM from birth to the second injection of the vaccine (130 days) and comparable with CM from that point to the final BW.
Tipo de documento
Artículo
Versión del documento
Versión publicada
Lengua
Inglés
Materias (CDU)
663/664 - Alimentos y nutrición. Enología. Aceites. Grasas
Páginas
9
Publicado por
Elsevier
Publicado en
Animal
Citación
Carabús, A., R.D. Sainz, J.W. Oltjen, M. Gispert, and M. Font-i-Furnols. 2017. "Growth Of Total Fat And Lean And Of Primal Cuts Is Affected By The Sex Type". Animal 11 (8): 1321-1329. doi:10.1017/s1751731117000039.
Número del acuerdo de la subvención
INIA/Programa Nacional de Proyectos de Investigación Fundamental/RTA2010-00014-00-00/ES/Evaluación 'in vivo' del crecimiento alométrico de los tejidos muscular y adiposo de los cerdos según la genética y el sexo mediante tomografía computerizada/
Program
Qualitat i Tecnologia Alimentària
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