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Effect of weaning age and slaughter weight on carcass and meat quality of Talaverana breed lambs raised at pasture

Published online by Cambridge University Press:  18 August 2016

V. Cañeque ,
S. Velasco ,
M. Díaz ,
C. Pérez ,
F. Huidobro ,
S. Lauzurica ,
C. Manzanares  and
J. González
V. Cañeque*
Affiliation:
Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, Departamento de Tecnología de los Alimentos, Carretera de la Coruña, km 7·5, 28040 Madrid, Spain
S. Velasco
Affiliation:
Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, Departamento de Tecnología de los Alimentos, Carretera de la Coruña, km 7·5, 28040 Madrid, Spain
M. Díaz
Affiliation:
Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, Departamento de Tecnología de los Alimentos, Carretera de la Coruña, km 7·5, 28040 Madrid, Spain
C. Pérez
Affiliation:
Universidad Complutense, Facultad de Veterinaria, Avenida Puerta de Hierro, s/n. 28040 Madrid, Spain
F. Huidobro
Affiliation:
Instituto Madrileño de Investigación Agraria y Alimentaria, Apartado 127, 28800 Alcalá de Henares, Madrid, Spain
S. Lauzurica
Affiliation:
Universidad Complutense, Facultad de Veterinaria, Avenida Puerta de Hierro, s/n. 28040 Madrid, Spain
C. Manzanares
Affiliation:
Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, Departamento de Tecnología de los Alimentos, Carretera de la Coruña, km 7·5, 28040 Madrid, Spain
J. González
Affiliation:
Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, Departamento de Tecnología de los Alimentos, Carretera de la Coruña, km 7·5, 28040 Madrid, Spain
*
† E-mail caneque@inia.es
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Abstract

Three weaning treatments (weaning at 45 days of age, at 65 days of age, unweaned) and two slaughter weights (24 and 28 kg) were compared in lambs raised at pasture, and their effect on carcass and meat traits were studied. Unweaned lambs displayed a greater growth rate, lower concentrate consumption, greater dorsal fat thickness, more kidney knob and channel fat and greater total fat levels, measured through dissection of the hind limb. Total collagen concentration was lower in unweaned lambs and the intramuscular fat of these same animals exhibited a greater proportion of saturated fatty acids and a lower n-6/n-3 fatty acid ratio. Slaughter weight influenced scored carcass fatness, which was greater in heavier lambs, meat colour, which displayed greater lightness in lower-weight lambs, and water-holding capacity, which was lower in lambs with the lower slaughter weight. The heavier lambs displayed lower soluble collagen values, and the intramuscular fat of the longissimus dorsi muscle of these same lambs contained higher levels of monounsaturated and lower levels of polyunsaturated fatty acids.

Keywords

carcass qualitygrazinglambslaughter weightweaning.
Type
Growth, development and meat science
Information
Animal Science , Volume 73 , Issue 1 , August 2001 , pp. 85 - 95
Copyright
Copyright © British Society of Animal Science 2001

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