Body fat influences departure from stopover sites in migratory birds: evidence from whole-island telemetry
Body fat influences departure from stopover sites in migratory birds: evidence from whole-island telemetry
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DOI：
10.1098/rsbl.2009.1028
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发表时间：
2010-08-23
期刊：
影响因子：
3.3
通讯作者：
Fusani, Leonida
中科院分区：
文献类型：
--
作者：
Goymann, Wolfgang;Spina, Fernando;Fusani, Leonida
迁徙仍然是动物生命中最大的谜团之一。小型候鸟在穿越沙漠或海洋等生态屏障后，依靠中途停留补充燃料。以前的研究表明，燃料储备可能决定中途停留时间，但由于方法上的限制，这一假设无法得到检验。在这里，我们提供的证据表明，皮下脂肪商店确定停留时间测量永久性的迁徙花园莺（西尔维娅borin）在一个小的地中海岛屿在春季迁移与遥测方法。拥有大量脂肪储存的花园莺比瘦鸟离开岛屿的时间要早得多。除了一只胖鸟外，所有的鸟都在捕获后的同一天晚上离开了岛屿，平均停留时间估计为8.8小时。相比之下，瘦鸟的平均估计总停留时间为41.3小时。据我们所知，这是第一个研究，衡量真正的最小停留时间的鸣禽在迁徙。
Migration remains one of the great mysteries of animal life. Small migratory birds rely on refuelling stopovers after crossing ecological barriers such as deserts or seas. Previous studies have suggested that fuel reserves may determine stopover duration but this hypothesis could not be tested because of methodological limitations. Here, we provide evidence that subcutaneous fat stores determine stopover duration by measuring the permanence of migratory garden warblers (Sylvia borin) on a small Mediterranean island during spring migration with telemetry methods. Garden warblers with large amounts of fat stores departed the island significantly sooner than lean birds. All except one fat bird left the island on the same evening after capture, with a mean total stopover estimate of 8.8 hours. In contrast, the mean estimated total stopover duration of lean birds was 41.3 hours. To our knowledge, this is the first study that measures the true minimum stopover duration of a songbird during migration.