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Article Dans Une Revue Journal of Animal Science Année : 2005

Repeated handling of pigs during rearing. II. Effect of reactivity to humans on aggression during mixing and on meat quality

Résumé

The present study was designed to determine whether reactivity toward humans can be used to predict a pig's reactivity to the slaughter procedure as measured by postmortem muscle metabolism. Forty-two pigs were group-reared in six pens with straw-bedding. Pigs received regular positive (HI) or mildly negative (RC) handling training in a separate pen for 40 d before slaughter. Control pigs remained in their home pens throughout rearing. Pigs were slaughtered at a commercial packing plant, and half of each treatment group (HI, RC, or controls) was accompanied by the handler throughout mixing and transportation, as well as a portion of the lairage time and introduction to the holding pens situated before the slaughter room, whereas the other half was not accompanied by the handler. Muscle pH and temperature, objective color (L*, a*, and b* values), and drip loss were measured on the LM, biceps femoris, semimembranosus, and adductor femoris. Prior handling experience did not in itself influence ultimate meat quality (P > 0.37); however, the presence of the negative handler (RC pigs) at slaughter accelerated (P < 0.06) preslaughter glycogen breakdown in the LM. Fighting behavior during mixing explained between 13 and 32% of the variability of lightness (L* values) of the LM, biceps femoris, and semimembranosus. Visua
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Dates et versions

hal-00490156 , version 1 (08-06-2010)

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Citer

Claudia C. Terlouw, Jocelyne J. Porcher, Xavier Fernandez. Repeated handling of pigs during rearing. II. Effect of reactivity to humans on aggression during mixing and on meat quality. Journal of Animal Science, 2005, 83 (7), pp.1664-1672. ⟨10.2527/2005.8371664x⟩. ⟨hal-00490156⟩
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