岛屿性决定了埃及种群的巢性别比率变化
Guillermo Gómez-López1,2, Ana Sanz-Aguilar3,4, Martina Carrete5
1Department of Evolutionary Ecology, National Museum of Natural Sciences Spanish National Research Council Madrid Spain.
Ecology and evolution
|August 2, 2023
概括
埃及的后代的性别比例在内陆和岛屿种群之间有所不同. 岛屿性影响了性别分配,大陆人口略有女性偏见,岛屿人口略有男性偏见.
科学领域:
- 生态生态学 生态生态学
- 进化生物学 进化生物学
- 鸟类学 鸟类学是一门学科.
背景情况:
- 后代的性别比率变化在鸟类生命史中至关重要,食物可用性和父母年龄等因素影响着它.
- 岛屿生态系统经常表现出独特的人口和生态特征 (岛屿综合症),但岛屿和大陆人口之间的性别比例差异未得到充分研究.
研究的目的:
- 研究影响埃及 (Neophron percnopterus) 二次性比的个人和环境因素.
- 为了比较30年的西班牙大陆和岛屿人口之间的性别比率模式.
主要方法:
- 利用了西班牙大陆和加拿大群岛埃及种群的长期监测数据 (1995-2021年).
- 评估了岛屿性,父母年龄,繁殖现象学,幼大小,化顺序,繁殖单元类型以及空间/时间变异性对后代性别比率的影响.
主要成果:
- 没有检测到总体人口层面的性别偏见.
- 大陆人口表现出非显著的女性偏差 (0.47),而加拿大群岛人口显示出显著的男性偏差 (0.55).
- 岛屿人口中潜在的男性偏向的不成熟死亡率可能会平衡成年人性别比率.
结论:
- 岛屿性显著影响埃及子后代的性别比率,导致对大陆和岛屿人口的差异性影响.
- 这项研究为性别分配理论做出了贡献,通过证明性别比率偏差是对与岛屿性相关的复杂环境因素的反应.
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