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Relationship between carcass traits, prime cuts and carcass grading from foals slaughtered at the age of 13 and 26 months and supplemented with standard and linseed-rich feed

Published online by Cambridge University Press:  17 October 2017

M. Ruiz ,
M. V. Sarriés ,
M. J. Beriain ,
S. Crecente ,
R. Domínguez  and
J. M. Lorenzo
M. Ruiz
Affiliation:
IS-FOOD, Research Institute for Innovation & Sustainable Development in Food Chain, Escuela Técnica Superior de Ingenieros Agrónomos, Universidad Pública de Navarra, Campus de Arrosadía, 31006 Pamplona, Spain
M. V. Sarriés*
Affiliation:
IS-FOOD, Research Institute for Innovation & Sustainable Development in Food Chain, Escuela Técnica Superior de Ingenieros Agrónomos, Universidad Pública de Navarra, Campus de Arrosadía, 31006 Pamplona, Spain
M. J. Beriain
Affiliation:
IS-FOOD, Research Institute for Innovation & Sustainable Development in Food Chain, Escuela Técnica Superior de Ingenieros Agrónomos, Universidad Pública de Navarra, Campus de Arrosadía, 31006 Pamplona, Spain
S. Crecente
Affiliation:
INGACAL Instituto Gallego de La Calidad Agroalimentaria, Centro de Investigaciones Agrarias de Mabegondo, Apartado 10, 15080 La Coruña, Spain
R. Domínguez
Affiliation:
Centro Tecnológico de la Carne de Galicia, Rúa Galicia N° 4, Parque Tecnológico de Galicia, San Cibrao das Viñas, 32900 Ourense, Spain
J. M. Lorenzo
Affiliation:
Centro Tecnológico de la Carne de Galicia, Rúa Galicia N° 4, Parque Tecnológico de Galicia, San Cibrao das Viñas, 32900 Ourense, Spain
*
†E-mail: vsarries@unavarra.es
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Abstract

In order to improve foal carcass quality, it is necessary in particular to improve the carcass dressing percentage and tissue composition. Thus, it is important to establish relationships between grading systems and these parameters. This research was conducted to study the effect of slaughter age (13 v. 26 months) and finishing feed (standard v. linseed feed) on carcass characteristics such as subcutaneous fat colour plus classification of foals for the degree of fatness and conformation. For this study, 46 foals of crossbred genotype (Galician Mountain×Burguete) were used. Finishing feed did not affect any parameter, whereas slaughter age influenced all parameters (P<0.05). The oldest foals had higher carcass measurements, 13% more of meat, 4% more of bone, 12% more of fat, and 4% and 9% bigger fore- and hindquarter, respectively. Consequently, bigger valuable prime cuts were obtained. Nevertheless, the meat : bone ratio was very similar for both 13- and 26-month-old foals (2.88). Most of 26-month-old foals were classified in ‘E’ (Extra) and ‘5’ (Complete fat cover) categories of conformation and degree of fatness. Most of the carcasses showed subcutaneous fat described as yellowish-white irrespective of age or diet. A regression model found that conformation (36%) and degree of fatness (33%) in live animals was positively linked with carcass tissue composition. It is therefore suggested that producers aim for older slaughter ages than 13 months and that the foal meat industry establishes grading systems to predict carcass quality. Further studies should be necessary to find the optimal slaughter age to obtain carcasses in the best categories of degree of fatness and conformation. New studies should be recommended to improve the meat : bone ratio of foal carcasses as it estimates the aptitude for meat production.

Keywords

carcass gradinglinseed supplementationcarcass conformationfatness gradingprime cuts
Type
Research Article
Information
animal , Volume 12 , Issue 5 , May 2018 , pp. 1084 - 1092
Copyright
© The Animal Consortium 2017 

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