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Ten Tudanca calves were used to study the effect of castration at 10 months of age. Since 14 months of age until slaughter, at 18 months of age, they remained on pasture. Average daily live weight gain since castration until turn-out to pasture were lower in the castrated group (349 vs. 595 g/animal/day; p≤0.05) but differences in average daily gain were not significant during the following grazing period (755 vs. 904 g/animal/day; p= 0.159). The castrated group showed lower values (p≤0.05) of live weight at slaughter, carcass weight (168 vs. 202 kg), and dressing percentage, and higher (p≤0.05) percentage of dissectionable total fat of the 6th rib (13.4 vs. 8.6%) and percentage of intramuscular fat (3.8 vs. 2.1%). No differences were observed between treatments (p>0,1) on conformation and fatness carcass scores. Meat from castrated animals showed 24 hours post-slaughter higher values (p≤0.05) of C* and a tendency (p≤0.1) to higher values of Ho. Meat from castrated animals showed lower values (p≤0.05) of maximum shear force (4.1 vs. 6.3 kg) at 7 days of ageing.

Utilidad de la castración para mejorar el engrasamiento de la canal y la calidad de la carne de añojos de raza Tudanca acabados en pastoreo