斑马在一个充满恐惧的景观中的风险感知
Yuchen Chen1, Daniel T Blumstein1, Diana M Boyle2
1Department of Ecology and Evolutionary Biology University of California Los Angeles Los Angeles California USA.
Ecology and evolution
|May 15, 2025
概括
斑马不会显著改变警或基于感知狮子存在的飞行行为. 相反,它们依靠群体规模和物种间的关联来管理掠食风险.
科学领域:
- 生态生态学 生态生态学
- 动物行为 动物行为
- 保护生物学 保护生物学
背景情况:
- 捕食风险会影响动物的行为,但在异质的景观中介于猎物反应的因素尚不清楚.
- 了解这些因素对于多用途地区的野生动物管理和保护至关重要.
研究的目的:
- 研究斑马 (Equus quagga) 的警和飞行启动距离 (FID) 如何受到不同的掠夺风险的影响.
- 确定掠食者空间使用,息地和群体动态对抗掠食者战略的影响.
主要方法:
- 对斑马警 (抬头姿势) 和对模拟掠食风险 (狮子声播放) 的FIDs的行为观察.
- 统计建模 (通用线性混合模型) 来分析狮子空间使用,息地,NDVI,白天时间和斑马群特征的影响.
- 评估警和FID与狮子存在的可能性和暴露于狮子声调的关系.
主要成果:
- 警和FID没有受到估计狮子空间使用,息地类型或NDVI的显著影响.
- 斑马的警性随着群体规模的增加而下降,在中央群体位置和中午时间更低.
- 随着相关异种物种的数量增加,FIDs增加了.
- 在听到狮子声时,警性显著增加,无论捕食者在空间中的使用情况如何.
结论:
- 斑马的反掠食者行为不仅仅是由空间掠食风险决定的,而且涉及到一致的景观监测.
- 群体大小和物种间的关联是减轻掠食风险的关键策略,而不是仅依赖空间风险线索.
- 这些发现对理解野生动物对人类活动的反应和共同景观中的息地变化有影响.
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