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基于传感器和视觉行为分析干霍尔斯坦牛的干霍尔斯坦牛呈现明显的中间核心体温
Nicolle F F Bönmann1, Luis G D Mendonça2, Isabella Sellmer Ramos3
1Department of Animal and Food Sciences, Oklahoma State University, Stillwater, OK 74078, USA.
Animals : an open access journal from MDPI
|October 16, 2024
概括
乳牛在热应激期内具有较高核心体温 (CBT) 的乳牛表现出明显的活动模式和减少反,表明潜在的耐热差异. 这些发现表明CBT可以预测奶牛的热应激弹性.
科学领域:
- 动物科学动物科学
- 环境生理学环境生理学
- 乳牛管理 乳牛管理
背景情况:
- 干旱期间的热应激会对乳牛产后健康和哺乳生产率产生负面影响.
- 核心体温 (CBT) 的变化可能反映牛的不同热量产生或散热能力.
- 了解这些差异对于管理乳牛群的热应激至关重要.
研究的目的:
- 根据CBT,根据CBT分类为高温 (HT) 或低温 (LT) 的干燥霍尔斯坦牛之间的行为差异.
- 通过检查HT和LT奶牛的白细胞 (WBC) 转录组来探索潜在的分子差异.
- 为了确定产前CBT和活动模式是否可以预测热应激耐受性.
主要方法:
- 在夏季使用中位数CBT将50头干Holstein奶牛分为HT和LT群.
- 通过视觉观测 (16小时/母牛) 和自动监测系统 (AMS) 收集的行为数据,每只母牛42天.
- 分析了5只HT和5只LT奶牛的一个子组的白血细胞的转录组.
主要成果:
- 在视觉观察期间,观察到微小的行为差异.
- AMS数据显示,HT奶牛的高活跃期较长,产前不活跃期较少,产后反减少,与LT奶牛相比.
- 在HT奶牛与LT奶牛的白细胞中发现了16个差异表达基因 (DEG),其中几个与热应激有关.
结论:
- 由AMS监测的产前CBT和活动模式可以作为有价值的预测指标,用于识别具有不同热应激耐受性的奶牛.
- 在热应激条件下,具有明显CBT的奶牛之间存在行为和分子差异.
- 对这些预测因素的进一步研究可以帮助制定有针对性的热应激缓解策略.
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