Tracking migration routes and the annual cycle of a trans-Sahara songbird migrant
Tracking migration routes and the annual cycle of a trans-Sahara songbird migrant
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DOI：
10.1007/s00265-012-1340-5
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发表时间：
2012-03
影响因子：
2.3
通讯作者：
Heiko Schmaljohann;M. Buchmann;J. Fox;F. Bairlein
中科院分区：
文献类型：
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作者：
Heiko Schmaljohann;M. Buchmann;J. Fox;F. Bairlein
运动生态学研究强调了基于个体的研究的重要性。由于追踪设备直到最近才适用于识别小型鸟类的全年移动，因此这些物种的迁移路线依赖于视觉观察和环恢复。在古北-非洲移徙系统内，环形移徙似乎是总的移徙模式。然而，物种特异性迁移路线内的个体间差异是未知的。在这里，我们追踪雄性北方小麦鸟Oenanthe oenanthe的个体迁徙路线和年度周期，这是一种来自德国繁殖种群的跨撒哈拉鸣禽迁徙，带有轻型地理定位器。两个迁移最有可能通过西班牙向西非，但返回通过科西嘉/撒丁岛，而另外两个似乎通过撒丁岛和科西嘉在秋季和通过西班牙和法国在春季（循环迁移）。第五个在两个赛季中大概采取了同样的路线，经过法国和巴利阿里群岛。所有的鸟类都在非洲西部的萨赫勒地区过冬。秋季和春季的总体迁移距离相似（约4，100公里），而春季的总体迁移速度（126公里/天）通常高于秋季（88公里/天）。鸟类在繁殖区停留约130天，在越冬地停留约147天。
Movement ecology studies have highlighted the importance of individual-based research. As tracking devices have not been applicable for identifying year-around movements of small birds until recently, migration routes of such species relied on visual observations and ring recoveries. Within the Palaearctic–African migration system, loop migration seems to be the overall migration pattern. The interindividual variations within species-specific migration routes are, however, unknown. Here, we track the individual migration routes and annual cycles of male Northern WheatearsOenanthe oenanthe, a trans-Sahara songbird migrant from a German breeding population with light-level geolocators. Two migrated most likely via Spain towards western Africa but returned via Corsica/Sardinia, while two others seemed to migrate via Sardinia and Corsica in autumn and via Spain and France in spring (loop migration). The fifth took presumably the same route via France and the Balearics in both seasons. All birds wintered in the Sahel zone of western Africa. Overall migration distances for autumn and spring were similar (about 4,100 km), whereas the overall migratory speed was generally higher in spring (126 km day−1) than in autumn (88 km day−1). Birds spent about 130 days at the breeding area and 147 days at the wintering grounds.