Moult migrant Tennessee Warblers undergo extensive stopover in peri-urban forests of southern Quebec

IF 1 4区 生物学 Q3 ZOOLOGY Canadian Journal of Zoology Pub Date : 2023-10-19 DOI:10.1139/cjz-2023-0109
Vanessa Poirier, Barbara Frei, Mathilde Lefvert, Ana Morales, Kyle Hamish Elliott
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Abstract

Stopovers are the most energy- and time-consuming events during avian migration, yet individuals of certain species make long stopovers to moult (‘moult migration’). Requiring abundant energy and a prolonged stay, moult migrants should occupy small stopover home ranges in resource-rich habitats. Understanding migrant behaviour at their stopovers is critical for implementing conservation efforts for declining Neotropical passerines. To examine the stopover timing and habitat use of one such moult migrating passerine, we radio-tagged 18 moulting and 4 post-moult Tennessee Warblers (Leiothlypis peregrina A. Wilson, 1811) at an autumn stopover site. Although our data were biased towards one sampling year, moult migrants generally arrived at the stopover site earlier (average = 2 August) than post-moult migrants (average = 12 September). Moult migrants also stayed longer (46 ± 5 days) than post-moult migrants (8 ± 6 days) and had large overlapping stopover home ranges (~15 ha) that were dependent on high abundance of forest (%) and forest edge (m). We conclude that Tennessee Warblers occupied forested stopover sites within a peri-urban landscape where they successfully moulted before continuing migration. This study illustrates the importance of including stopover sites in conservation plans, particularly in cities where quality habitats are scarce.
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换毛的田纳西林莺在魁北克南部的城郊森林中进行了广泛的停留
中途停留是鸟类迁徙过程中最耗费精力和时间的事情,但某些物种的个体会在中途停留很长时间来换羽(“换羽迁徙”)。换毛候鸟需要充足的能量和长时间的停留,它们应该在资源丰富的栖息地占据一小块中途停留的范围。了解候鸟在中途停留地的行为对于实施保护日益减少的新热带雀形目动物的努力至关重要。为了研究一种这样的换羽迁徙雀鸟的中途停留时间和栖息地利用,我们在一个秋季中途停留点对18只换羽的田纳西林莺和4只换羽后的田纳西林莺(leiothlyypis peregrina A. Wilson, 1811)进行了无线电标记。虽然我们的数据偏向于一个采样年,但蜕皮候鸟通常比蜕皮后候鸟(平均= 9月12日)更早到达中途停留点(平均= 8月2日)。换毛候鸟停留的时间(46±5天)也比换毛后候鸟停留的时间(8±6天)更长,并且有很大的重叠的中途停留范围(~15公顷),这取决于森林的丰度(%)和森林边缘(m)。我们得出结论,田纳西林莺占据了城郊景观中有森林的中途停留点,在那里它们成功地换毛,然后继续迁徙。这项研究说明了在保护计划中包括中途停留点的重要性,特别是在高质量栖息地稀缺的城市。
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来源期刊
Canadian Journal of Zoology
Canadian Journal of Zoology 生物-动物学
CiteScore
2.40
自引率
0.00%
发文量
82
审稿时长
3 months
期刊介绍: Published since 1929, the Canadian Journal of Zoology is a monthly journal that reports on primary research contributed by respected international scientists in the broad field of zoology, including behaviour, biochemistry and physiology, developmental biology, ecology, genetics, morphology and ultrastructure, parasitology and pathology, and systematics and evolution. It also invites experts to submit review articles on topics of current interest.
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