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Effect of caponisation on growth and on carcass and meat characteristics in Castellana Negra native Spanish chickens

Published online by Cambridge University Press:  01 February 2008

J. A. Miguel ,
J. Ciria ,
B. Asenjo  and
J. L. Calvo
J. A. Miguel*
Affiliation:
Área de Producción Animal, EU Ingenierías Agrarias de Soria, Universidad de Valladolid, Campus Universitario s/n 42004-Soria, Spain
J. Ciria
Affiliation:
Área de Producción Animal, EU Ingenierías Agrarias de Soria, Universidad de Valladolid, Campus Universitario s/n 42004-Soria, Spain
B. Asenjo
Affiliation:
Área de Producción Animal, EU Ingenierías Agrarias de Soria, Universidad de Valladolid, Campus Universitario s/n 42004-Soria, Spain
J. L. Calvo
Affiliation:
Área de Producción Animal, EU Ingenierías Agrarias de Soria, Universidad de Valladolid, Campus Universitario s/n 42004-Soria, Spain
*
E-mail: jangel@agro.uva.es
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Abstract

This paper analyses the effect of caponisation at 8 weeks on growth and on carcass and meat characteristics of Castellana Negra chickens slaughtered at 29 weeks. Caponisation did not result in weight improvements as compared with uncastrated birds. No changes were observed in the growth rate or in the parameters determining the point of inflection in the growth curve (sexual maturity). Regarding carcass characteristics, castration resulted in a wider breast angle and heavier pectoral muscles in caponised birds than in uncastrated birds, but with no differences in thigh and drumstick weight and length. Capon meat showed a higher fat content than that of cocks, making it juicier and less fibrous. No differences were found in fatty acid content (C 14:0, C 18:0, C 18:1 and C 18:2). Nor were there any differences in colour measurements, pH or water loss from the meat. While cocks’ thighs + drumsticks were found to be tougher than their breasts, there were no such differences in capons because after castration, thigh + drumstick meat became more tender.

Keywords

caponsfatindigenous breeds
Type
Full Paper
Information
animal , Volume 2 , Issue 2 , February 2008 , pp. 305 - 311
Copyright
Copyright © The Animal Consortium 2008

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