几内亚比绍比热戈斯群岛海岸迁徙鸟类摄食率季节性变化的计量方法

IF 1.8 3区 生物学 Q1 ORNITHOLOGY
Ibis Pub Date : 2024-08-09 DOI:10.1111/ibi.13348
Ana P. Coelho, Afonso D. Rocha, Aissa R. de Barros, Theunis Piersma, José A. Alves
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引用次数: 0

摘要

沿东大西洋航道迁徙的滨鸟必须从北极和亚北极地区的繁殖地长途跋涉到欧洲和非洲的越冬地。选择越冬地点是一个重要的决定,因为它可能会对当前和未来产生影响。岸鸟必须确保它们有足够的资源来满足冬季的能量需求,以及在它们必须为返回迁徙积累脂肪的燃料阶段的能量需求。迁徙的岸鸟在全球范围内都在减少,其中在热带非洲越冬的几个种群数量急剧下降,尤其是与在温带欧洲越冬的同类相比。然而,非洲最重要的越冬地之一--几内亚比绍的比热戈斯群岛(Bijagós Archipelago)仍相对缺乏研究。在这项研究中,我们对在比热戈斯群岛越冬的八种迁徙滨鸟的摄食率进行了量化,并探讨了它们在群岛停留期间摄食率的变化情况。鉴于野外摄食率测量的不确定性,我们的方法进行了异速验证,证实其斜率与理论预测相当,并在许多情况下得到了验证。与我们的预期相反,我们没有发现在加油期摄入量增加的证据;事实上,在非繁殖季节,少数物种的摄入量明显下降。不同物种之间的异速关系也证实了日能量摄入量随季节的变化而减少,尤其是较小的物种。将比热戈斯的摄入率与航道沿线其他越冬地的摄入率进行比较后发现,环斑鸻(Charadrius hiaticula)、翘嘴鹬(Calidris ferruginea)和条尾鸥(Limosa lapponica)的摄入率特别低。摄食率和相关能量摄入的限制表明,一些物种在比热戈斯可能受到能量限制,特别是在加油时。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
An allometric approach to seasonal changes in intake rates of migratory shorebirds in the Bijagós Archipelago, Guinea-Bissau

Shorebirds migrating along the East Atlantic Flyway must travel long distances from their breeding sites in arctic and subarctic regions to wintering areas in Europe and Africa. Selecting a winter location is an important decision, as it can have both immediate and future consequences. Shorebirds must ensure they have enough resources to fulfil their energetic requirements during winter, as well as during the fuelling phase, when they must accumulate fat stores for the return migration. Migratory shorebirds are declining worldwide, with several populations wintering in tropical Africa facing steep declines, particularly when compared with their conspecifics wintering in temperate Europe. However, one of the most important wintering sites in Africa remains relatively unstudied, the Bijagós Archipelago, Guinea-Bissau. In this study, we quantify intake rates of eight migratory shorebird species wintering in the Bijagós and explore how these vary throughout their stay in the archipelago. Given the uncertainties associated with measurements of field intake rates, an allometric validation of our approach confirmed a slope comparable to that predicted by theory and verified in many situations. Contrary to our expectations, we found no evidence for an increase in intake rates in the fuelling period; in fact, decreases were noticeable in a few species over the non-breeding season. The allometric relationship across species also confirmed the seasonally decreasing daily energetic intakes, particularly by smaller species. The comparison between the intake rates in the Bijagós and those reported in other wintering sites along the flyway highlights the particularly low values for Ringed Plover Charadrius hiaticula, Curlew Sandpiper Calidris ferruginea and Bar-tailed Godwit Limosa lapponica. Limitations in intake rates and the associated energetic intake suggest that some species may be energetically constrained in the Bijagós, particularly during fuelling.

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来源期刊
Ibis
Ibis 生物-鸟类学
CiteScore
4.60
自引率
9.50%
发文量
118
审稿时长
6-12 weeks
期刊介绍: IBIS publishes original papers, reviews, short communications and forum articles reflecting the forefront of international research activity in ornithological science, with special emphasis on the behaviour, ecology, evolution and conservation of birds. IBIS aims to publish as rapidly as is consistent with the requirements of peer-review and normal publishing constraints.
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