在四种非洲草食动物物种中,主动避免食和伏击掠食风险
Emily Bennitt1, Hattie L A Bartlam-Brooks2, Tatjana Y Hubel2
1Okavango Research Institute, University of Botswana Maun Botswana.
Ecology and evolution
|June 6, 2024
概括
草食动物减少运动,避免危险的区域,当捕食者如狮子是活跃的,特别是在雨季. 猎物的体重并没有显著影响这些反捕食者的行为.
科学领域:
- 生态生态学 生态生态学
- 行为生态学 行为生态学
- 野生动物管理 野生动物管理
背景情况:
- 草食动物面临着平衡营养需求,温度调节和避免捕食者的不断挑战.
- 捕食者-猎物动态受到特定物种的特征的影响,影响狩猎成功和逃避策略.
研究的目的:
- 调查奥卡万戈三角洲的食草动物采用的主动掠食风险回避策略.
- 分析捕食者活动,息地选择和资源可用性对草食者反捕食者行为的影响.
主要方法:
- 利用了来自多种草食动物 (像pala,tessebe,野兽,斑马) 和捕食动物 (非洲野狗,狮子) 的GPS项圈数据.
- 检查了捕食者活动水平和草食动物运动模式之间的相关性.
- 评估捕食者和猎物的息地选择,以及季节性资源可用性和猎物的体重对抗捕食者的行为的影响.
主要成果:
- 草食动物的运动模式与狮子活动的相关性比野生狗活动的相关性更强.
- 捕食者的息地选择并不取决于它们的活动水平;由于猎物的丰富性,与猎物息地发生重叠.
- 在雨季,一个资源丰富的时期,食草动物表现出更强烈的反捕食者行为.
结论:
- 草食动物通常会减少活动,并避免在捕食者最活跃时高风险区域,以尽量减少捕食.
- 猎物的体重并不是积极的反捕食者行为的强度的一个重要因素.
- 来自多个同情物种的综合数据对于理解复杂的捕食者-猎物动态至关重要.
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