NR ZELA

AU Raj,A.B.M.; Moss,B.W.

TI Effect of Mixing Male Sex Types of Cattle on their Meat Quality and Stress-Related Parameters

QU Meat Science 1992; 32: 367-386

PT journal article

AB Mixing of male cattle prior to slaughter results in increased physical activity, particularly homosexual behaviour, teasing and mounting. The number of mounts exhibited during the initial 4h after mixing showed statistically significant correlations with serum enzyme levels at slaughter, pHu, glycolytic metabolites, colour and pigment proportions of M. longissimus dorsi at 48h post mortem. The amount of teasing showed significant correlations with pHu, glycolytic metabolites, colour and pigment proportions. The aggressive behaviour, pushing and butting, occurred only as retaliative acts and did not seem to affect meat quality. Among the male types used in tis study, the vasectomised bulls were found to be more homosexually hyperactive and thus produced the highest number of dark-cutting carcasses, suggesting that the vasectomised bulls are more prone to dark-cutting due to mounting that occurs during pre-slaughter mixing.

SP englisch

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