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养殖管理方式和运输时长对哺乳山羊羔应激反应及肉质性状的影响

Effects of farm management practices and transport duration on stress response and meat quality traits of suckling goat kids.

作者信息

Alcalde M J, Suárez M D, Rodero E, Álvarez R, Sáez M I, Martínez T F

机构信息

1Departamento de Ciencias Agroforestales,Universidad de Sevilla,41 013,Sevilla,Spain.

2Departamento de Biología y Geología,Universidad de Almería,04 120,Almería,Spain.

出版信息

Animal. 2017 Sep;11(9):1626-1635. doi: 10.1017/S1751731116002858. Epub 2017 Jan 24.

Abstract

Studies aimed to assess up to what extent farming and transport previous to slaughtering might affect physiology and meat quality in young goat kids are needed, with the ultimate purpose of promoting practices that minimize stress in these animals. In this regard the effects of on-farm management and transport duration on some physiological responses and meat quality parameters in goat kids were assessed. Two farms representing 'high' and 'low' welfare-friendly management practices were selected. In total, 32 suckling kids were withdrawn from each farm, transported by road for 2 or 6 h, and then slaughtered. Blood samples were collected both on-farm and in the slaughterhouse, and biochemistry, cell counts and haematocrit were determined. After slaughtering, carcass quality parameters were measured. Longissimus dorsi muscle was dissected and pH, colour parameters, water holding capacity and shear force were measured throughout 8-day ageing period. Results indicate that, regardless its duration, transport caused significant effects on some blood parameters suggesting stress in live animals, like glucose, cortisol or creatine kinase. Despite the marked stress status in animals, this condition was not decisively reflected on L. dorsi quality parameters, but some effects were observed regarding fat cover in carcasses and colour parameters. The results suggest that postmortem changes throughout ageing were more decisive in terms of meat quality than stressful management either on-farm or during transport.

摘要

需要开展旨在评估屠宰前养殖和运输对幼龄山羊生理及肉质影响程度的研究,最终目的是推广能将这些动物的应激降至最低的做法。在此方面,评估了农场管理和运输时长对山羊幼崽某些生理反应及肉质参数的影响。选择了代表“高”和“低”福利友好型管理做法的两个农场。每个农场总共选取32只哺乳幼崽,通过公路运输2或6小时,然后进行屠宰。在农场和屠宰场采集血样,测定生化指标、细胞计数和血细胞比容。屠宰后,测量胴体质量参数。解剖背最长肌,在8天的成熟期间测量pH值、颜色参数、持水力和剪切力。结果表明,无论运输时长如何,运输都会对一些血液参数产生显著影响,表明活体动物存在应激,如葡萄糖、皮质醇或肌酸激酶。尽管动物处于明显的应激状态,但这种状况并未决定性地反映在背最长肌的质量参数上,但在胴体脂肪覆盖和颜色参数方面观察到了一些影响。结果表明,在肉质方面,成熟过程中的宰后变化比农场或运输过程中的应激管理更具决定性。

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