作为乳牛分娩后弹性指标的行为模式
I D E van Dixhoorn1, R M de Mol1, S K Schnabel2
1Wageningen Livestock Research, 6708 WD Wageningen, the Netherlands.
Journal of dairy science
|July 27, 2023
概括
乳牛产后的弹性可以通过干旱期的行为来预测. 监测休息时间和反的规律性有助于识别需要早期干预的奶牛,以预防疾病.
科学领域:
- 动物科学动物科学
- 兽医医学 兽医医学 兽医医学
- 乳制品生产 乳制品生产
背景情况:
- 乳牛在分娩后的过渡期面临着健康挑战.
- 弹性,定义为保持健康或快速恢复,对于奶牛的福利和生产力至关重要.
- 早期识别有失去弹性风险的奶牛,可以及时采取预防措施.
研究的目的:
- 确定干旱时期的定量行为指标,预测产后奶牛的弹性降低.
- 利用非侵入式传感器技术,持续监测奶牛的行为.
- 为早期干预策略开发预测模型.
主要方法:
- 180只奶牛使用智能标签传感器 (部和腿部) 进行监测,在分娩前2周至分娩后6周.
- 进行了临床评估和血液采样,以计算总赤字得分 (TDS) 作为弹性丧失的代理值.
- 用统计模型分析了干旱时期的行为数据,包括单变量和多变量分析,以确定TDS的预测因素.
主要成果:
- 平均不活动时间,反和站立的非周期性,以及静止行为的富里埃转换是总赤字得分 (TDS总) 的重要预测因素.
- 较高的平均进食时间和反和站立的规律性与更大的弹性有关.
- 最好的预测模型在预测TDS总数时实现了79.5%的灵敏度和73.2%的特异性.
结论:
- 干旱期间的定量行为特征,如不活动时间和反的规律性,是乳牛分娩后抵御力的可靠指标.
- 非侵入式传感器技术可以有效地监测这些行为,以便早期检测有风险的动物.
- 这些发现支持在干旱期间制定预防策略,以提高奶牛的健康和福利.
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