幼候鸟从定居点到成年期在非繁殖范围内的迁移
Tómas Grétar Gunnarsson1, José A Alves1,2, James J Gilroy3,4
1South Iceland Research Centre, University of Iceland, Laugarvatn, Iceland.
The Journal of animal ecology
|July 1, 2024
概括
年轻的海岸鸟表现出强烈的地点忠诚度,在第一次迁徙后很少在非繁殖区域之间移动. 这种早期的定居点决定了未来的分布和人口动态.
科学领域:
- 生态生态学 生态生态学
- 鸟类学 鸟类学是一门学科.
- 动物迁徙 动物迁徙
背景情况:
- 迁徙的脊椎动物在成年后往往会对非繁殖场地表现出很高的位置忠诚度.
- 网站质量的变化可以显著影响个人的健康状况和人口统计.
- 了解青少年运动对于塑造人口分布至关重要,但很难研究.
研究的目的:
- 量化青少年和成人的运动模式在非繁殖范围的黑尾 (Limosa limosa islandica).
- 确定不同生命阶段的移动规模,并确定影响定居的因素.
- 评估早期定居对人口分布和人口统计过程的影响.
主要方法:
- 长期,范围广泛的重定位数百个颜色标记的黑尾.
- 应用状态空间模型来分析运动数据.
- 追踪个人从他们的第一个迁移到成年.
主要成果:
- 个体改变非繁殖区域的概率在所有年龄段都很低 (10.9%的第一到随后的冬天,8.3%的成年冬天).
- 在同一年内,青少年 (17.0%) 和成年人 (10.4%) 的区域间流动也很低.
- 大多数从第一秋到成年期的非繁殖迁移都发生在区域和<100公里内.
结论:
- 在特定的非繁殖地区定居的未成年人是人口分布的关键决定因素.
- 初始定居后的有限移动表明,早期生活因素强烈影响长期分布和人口趋势.
- 保护策略应侧重于影响初始幼地点选择的因素.
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