具有刻板印象的舌头滚动行为的奶牛更好地应对他们的环境吗?
Chenyang Li1,2, Xiaoyang Chen1, Tingting Fang1
1State Key Laboratory of Animal Nutrition and Feeding, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China.
Frontiers in veterinary science
|June 6, 2024
概括
乳牛的舌头滚动似乎不是应对压力的机制,因为皮质醇水平不受影响. 然而,极端的舌头滚动与牛的乳蛋白百分比较低有关.
科学领域:
- 动物科学动物科学
- 伦理学 伦理学 伦理学
- 兽医医学 兽医医学 兽医医学
背景情况:
- 刻板印象的行为,特别是口头的行为,如奶牛的舌头滚动,是动物福利不佳的指标.
- 据推测,动物从事刻板印象的行为作为应对压力的机制,可能导致压力激素水平降低.
研究的目的:
- 调查刻板印象行为,特别是舌头滚动和奶牛的压力水平之间的关系.
- 为了确定舌头滚动是否可以作为牛的应对压力的机制.
主要方法:
- 在10天内,对916头母乳牛进行了行为观察.
- 在601头母牛的头发和唾液样本中测量了皮质醇度.
- 乳牛群改善 (DHI) 数据,包括牛奶蛋白的百分比,收集了762头奶牛.
主要成果:
- 在具有刻板印象行为和对照的奶牛之间,没有发现头发或唾液皮质醇度的显著差异.
- 舌头滚动频率与皮质醇度没有关联.
- 表现出极度舌头滚动的奶牛显示出明显较低的牛奶蛋白百分比,这种百分比随着舌头滚动的频率而增加.
结论:
- 乳牛的舌头滚动可能不是对压力的直接反应,至少在皮质醇水平上是如此.
- 牛的极端舌头滚动行为与乳蛋白含量降低有关,这表明可能与生理或营养因素有关,而不仅仅是压力.
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