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衰退中的海鸟的过去殖民地连接来自宿主寄生虫遗传数据

C P Cargill^1,2, K D McCoy³, B E Scott¹

¹University of Aberdeen, (School of Biological Sciences) Aberdeen UK.

Ecology and evolution

|March 12, 2026

概括

黑腿猫种群表现出复杂的连接模式. 散布显示出东向西的趋势,而夏季的移动更局部,挑战了孤立殖民地假设.

科学领域:

鸟类生态学鸟类生态学
人口遗传学人口遗传学
保护生物学保护生物学

背景情况:

黑腿 (Rissa tridactyla) 是一个易受攻击的,长寿的海鸟,分布广泛.
了解殖民地连接对于有效管理至关重要,但当前的模型往往将殖民地视为孤立的单位.
该物种的生命历史和广泛的繁殖范围在评估殖民地之间的移动方面提出了挑战.

研究的目的:

调查北大西洋猫种群的分散和季节性繁殖运动 (连接性).
评估贝叶斯分析微卫星基因型的有效性,以推断人口结构和运动.
测试地理距离是kittiwake殖民地连接的主要限制的假设.

主要方法:

使用贝叶斯分析 (BayesAss v3) 来自猫和海鸟 (Ixodes uriae) 的多位置微卫星基因型.
采用了基因继承 (IBD) 和马尔科夫链蒙特卡洛 (MCMC) 重新采样的概念来量化运动模式.
分析了从高北极到物种南部边界 (1992-2001) 的样本中的遗传数据.

主要成果:

在采样的殖民地中,Kittiwake散布和夏季繁殖运动是异质的.
在kittiwake分散模式中观察到一个明显的东向西纵向趋势.
夏季的繁殖运动更多地局部化而不是分散,大西洋上的连接是有限的.
地理距离与连接性存在较弱的相关性,这表明其他因素也有影响.

结论:

地理距离不是限制猫殖民地之间的连接的主要因素.
殖民地地位和同类协会似乎在塑造运动模式方面发挥了更重要的作用.
这些发现挑战了孤立殖民地的假设,并强调了需要动态管理方法的需要.

关键词:

大型鱼类 (Laridae) 是一个大型鱼类.北大西洋北大西洋的北大西洋苏格兰苏格兰苏格兰苏格兰特别保护区 (SPA) 是一个特别保护区.一般化添加剂模型 (GAM)主体寄生体

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