量化绵羊尸体参数的非侵入性方法:热环境和剩余料摄入之间的相互作用
Gabriel Ravi Gama Fontes1, Glayciane Costa Gois2, Rafael Torres de Souza Rodrigues1
1Programa de Pós-Graduação Em Ciência Animal, Universidade Federal Do Vale Do São Francisco, 56310-770, Petrolina, Pernambuco, Brazil.
Journal of thermal biology
|September 17, 2023
概括
阴影显著降低了多珀羊的热应激,改善了生理参数和尸体特征,无论它们的剩余料摄入量 (RFI). 这种管理策略对于动物生产至关重要,在温暖的环境中提高整体性能和福祉.
科学领域:
- 动物科学动物科学
- 环境生理学环境生理学
- 农业工程 农业工程
背景情况:
- 热环境通过影响生育能力和生产力,对畜牧业产生重大影响.
- 像红外热学和实时超声波等非侵入性技术对于在不进行屠宰的情况下评估动物福利是有价值的.
- 剩余料摄入量 (RFI) 是牲畜料效率的一个关键指标.
研究的目的:
- 评估热环境 (全日照与阴影) 对多珀羊的生理参数和尸体特征的影响.
- 评估这些影响与料效率相关,按积极和消极的剩余料摄入量 (RFI) 分类.
- 为了利用红外热学和实时超声波用于非侵入性数据收集.
主要方法:
- 20只多珀羊被分为阳性RFI (n=10) 和阴性RFI (n=10) 组.
- 采用了2x2的因数设计,使用了两个热环境 (全阳光,阴影) 和两个RFI组.
- 生理参数 (直肠温度,呼吸速率) 和表面温度 (眼球,皮肤) 用数字温度计和红外线温度计进行测量. 屠宰后对尸体的特性进行了评估.
主要成果:
- 阳光照射的羊的呼吸率,表面温度 (肋骨,后腿,侧翼) 和耐热系数显著提高.
- 观察到呼吸速率和平均表面温度之间,以及在阳光充足的情况下,腰部眼睛区域和屠宰体重之间存在强烈的相关性.
- 阴影显著降低了热应激指标,改善了生理和尸体特征之间的相关性,特别是阴性RFI绵羊和阴性RFI绵羊的阳性RFI绵羊.
结论:
- 给被关押的多珀羊提供阴影有效地减轻了对生理参数和尸体特征的热应激影响.
- 阴影是多珀羊生产的有利管理实践,无论它们的料效率 (RFI分类).
- 非侵入性热成像和超声波是监测热应激和评估绵羊尸体发育的有效工具.
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