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什么时候应该'聪明'的猎品种? 猎物可用性的季节性变化及其对猎繁殖模式的影响
Eleesha Annear1, Liaan Minnie1,2, Vincent van der Merwe3
1Department of Zoology Centre for African Conservation Ecology, Nelson Mandela University Gqeberha South Africa.
Ecology and evolution
|June 25, 2025
概括
猎 (Acinonyx jubatus) 的繁殖时间受其环境中季节性猎物的可用性影响. 这种适应能力有助于它们成功地养育幼,尽管猎物模式发生了变化.
科学领域:
- 生态学和进化生物学
- 哺乳动物繁殖 哺乳动物繁殖
- 保护生物学 保护生物学
背景情况:
- 哺乳动物的繁殖需要大量的能量,需要大量的母婴和幼的营养.
- 捕食者经常根据季节性食物的可用性来调整食策略,特别是在关键的繁殖阶段.
- 猎 (Acinonyx jubatus) 具有季节性猎物选择,在潮湿季节偏爱新生/幼,在干旱季节偏爱成年动物.
研究的目的:
- 测试假设季节性猎物可用性会影响猎在季节性环境中的繁殖时间.
- 为了比较季节性与非季节性降雨地区的猎的繁殖季节性.
- 了解猎如何调整生殖模式以应对环境和猎物可用性的变化.
主要方法:
- 分析的猎出生日期来自季节性 (n=142) 和非季节性 (n=106) 降雨地区.
- 与季节性猎物可用性 (新生儿,青少年,成年人) 相关的繁殖阶段 (受孕,出生).
- 在不同气候区域的猎种群之间比较出生季节性.
主要成果:
- 在季节性地区,58.5%的子是在雨季怀孕的,而60.6%是在干季出生.
- 季节性环境中的猎繁殖与新生/幼年猎物可用性的峰值保持一致.
- 在来自非季节性降雨地区的猎中没有观察到显著的出生季节性.
结论:
- 猎的繁殖时间受到季节性环境中季节性猎物的可用性的影响.
- 猎通过调整生殖策略来优化基于猎物资源的幼生存来表现出适应能力.
- 这种灵活性对于猎的保护至关重要,因为气候变化影响了猎物的繁殖模式.
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