群体大小对乳牛激动性相互作用的影响:一项描述性研究
Joseph Krahn1, Borbala Foris1, Kehan Sheng1
12357 Main Mall, Animal Welfare Program, Faculty of Land and Food Systems, The University of British Columbia, Vancouver, BC V6T 1Z6, Canada.
Animal : an international journal of animal bioscience
|February 20, 2024
概括
群体大小并没有显著改变食者中激动性相互作用的频率. 然而,占主导地位的层次结构仍然保持一致,这表明牛的复杂社会动态.
科学领域:
- 动物行为和动物福利.
- 管理畜牧业的管理.
- 动物群体中的社会动态.
背景情况:
- 集体养的牛表现出对像料这样的资源的激烈相互作用,影响了福利.
- 群体大小对这些激烈行为的影响还不太清楚.
研究的目的:
- 为了研究不同群体大小的牛群中食者中激动性相互作用的频率.
- 为了检查统治关系的一致性和个人互动启动跨不同的群体大小.
主要方法:
- 在两个阶段研究了50头牛的四个复制品:一组50头,然后五组10头,保持畜牧密度.
- 通过使用经过验证的算法,在电子料器上测量了对抗性的替换.
- 计算了个别的Elo评级,以确定占主导地位的类别,并确保在小组之间保持一致的分配.
主要成果:
- 每只母牛的激动性替代物的平均数量在50个 (34.1 ± 2.4) 和10个 (31.1 ± 4.5) 的组中相似,尽管较小的组显示出更多的变化.
- 在81.6 ± 7.7%的对中,激动性相互作用的双向方向性在不同组大小中保持一致.
- 开始相互作用的个体一致性是中等的 (类内相关系数 = 0.62 ± 0.11).
结论:
- 群体大小和牛的激烈行为之间的关系是复杂的,不是线性的.
- 尽管群体规模发生了变化,但主导层次结构和个人在开始互动中的角色似乎相对稳定.
- 需要进一步的研究才能充分理解这些动态及其对牛福利的影响.
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