Teixeira Dayane Lemos, Salazar Laura C, Enriquez-Hidalgo Daniel, Boyle Laura A
Instituto de Ciencias Agroalimentarias, Animales y Ambientales (ICA3), Universidad de O'Higgins, San Fernando, Chile.
Departamento de Ciencias Animales, Pontificia Universidad Católica de Chile, Santiago, Chile.
Front Vet Sci. 2020 Oct 5;7:576942. doi: 10.3389/fvets.2020.576942. eCollection 2020.
The study assessed the prevalence of animal-based pig welfare outcomes on one Chilean farm and one abattoir. A total of 198 pens of slaughter pigs (9,049 pigs) were observed on farm and 54 batches (8,843 pigs) were observed at the abattoir. All assessments were conducted from outside the pen on farm and from outside the corridor where pigs were unloaded from the truck at the abattoir. Batch size and number of pigs with ear, tail and skin lesions, hernias, rectal prolapse, bursitis, and lameness were recorded. Data were analyzed using generalized linear mixed models. There was a large variation among pens on farm and among batches at the abattoir for all outcomes. Bursitis was the most prevalent outcome recorded in both locations, followed by ear lesions recorded on farm and by tail lesions recorded at the abattoir. Ear lesions' prevalence was higher on farm ( < 0.001), while tail lesions, hernia, and bursitis prevalence were higher at the abattoir ( < 0.001). Ear lesions' prevalence on farm was higher in female and mixed-sex groups than in male groups (P < 0.01), but male groups tended to have a higher tail lesions' prevalence ( < 0.1). The results show a difference in welfare outcomes, suggesting that assessment of outcomes on farm could complement ante-mortem inspections at the abattoir. However, as the same animals were not inspected in the two locations and there is the possibility of a seasonal influence on the results, the findings should be interpreted with caution and further research is required.
该研究评估了智利一个农场和一个屠宰场中基于动物的猪福利状况。在农场观察了总共198栏待宰猪（9049头猪），在屠宰场观察了54批（8843头猪）。所有评估均在农场猪栏外以及屠宰场猪从卡车上卸下的走廊外进行。记录了批次规模以及有耳部、尾部和皮肤损伤、疝气、直肠脱垂、滑囊炎和跛足的猪的数量。使用广义线性混合模型对数据进行了分析。对于所有状况，农场各猪栏之间以及屠宰场各批次之间存在很大差异。滑囊炎是两个地点记录到的最普遍的状况，其次是农场记录到的耳部损伤以及屠宰场记录到的尾部损伤。耳部损伤在农场的发生率更高（<0.001），而尾部损伤、疝气和滑囊炎在屠宰场的发生率更高（<0.001）。农场中雌性和混合性别组的耳部损伤发生率高于雄性组（P<0.01），但雄性组的尾部损伤发生率往往更高（<0.1）。结果显示了福利状况的差异，表明对农场状况的评估可以补充屠宰场的宰前检查。然而，由于在两个地点检查的不是同一批动物，并且结果可能受到季节影响，因此对这些发现应谨慎解读，还需要进一步研究。
