Factors influencing the movement biology of migrant songbirds confronted with an ecological barrier
Factors influencing the movement biology of migrant songbirds confronted with an ecological barrier
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面临生态障碍的候鸟迁徙生物学影响因素
DOI：
10.1007/s00265-013-1614-6
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发表时间：
2013
影响因子：
2.3
通讯作者：
F. Moore
中科院分区：
文献类型：
--
作者：
Jaclyn A. Smolinsky;Robert H. Diehl;T. Radzio;D. Delaney;F. Moore
一只迁徙鸣禽是否跨越生态屏障进行长途飞行，很可能是对一些内源性和外源性因素的反应。在2008年和2009年秋季，我们使用自动无线电跟踪调查如何充满活力的条件下，年龄和天气影响的出发时间和方向的斯文森的画眉（Catharus ustulatus）在墨西哥湾北方海岸的迁徙中途停留。大多数鸟类在捕获后的晚上日落后1小时内离开。那些在第一天晚上离开或停留超过1天的鸟是瘦的。携带足以穿越墨西哥湾的脂肪的鸟类通常以季节性适当的南方方向离开，而瘦鸟几乎总是以北方方向飞向内陆。我们没有发现年龄或天气对出发的影响。瘦鸟的决定，以调整运动内陆可能反映了适合的沿海中途停留地点沉积的燃料商店和动机，以寻求更广泛的森林栖息地远离屏障之间的食物。
Whether or not a migratory songbird embarks on a long-distance flight across an ecological barrier is likely a response to a number of endogenous and exogenous factors. During autumn 2008 and 2009, we used automated radio tracking to investigate how energetic condition, age, and weather influenced the departure timing and direction of Swainson’s thrushes (Catharus ustulatus) during migratory stopover along the northern coast of the Gulf of Mexico. Most birds left within 1 h after sunset on the evening following capture. Those birds that departed later on the first night or remained longer than 1 day were lean. Birds that carried fat loads sufficient to cross the Gulf of Mexico generally departed in a seasonally appropriate southerly direction, whereas lean birds nearly always flew inland in a northerly direction. We did not detect an effect of age or weather on departures. The decision by lean birds to reorient movement inland may reflect the suitability of the coastal stopover site for deposition of fuel stores and the motivation to seek food among more extensive forested habitat away from the barrier.