Space use and site fidelity in the endangered Northern Bald Ibis Geronticus eremita: Effects of age, season, and sex

IF 1.5 4区 环境科学与生态学 Q3 BIODIVERSITY CONSERVATION Bird Conservation International Pub Date : 2022-06-29 DOI:10.1017/S0959270922000053
Verena Puehringer-Sturmayr, Julia Krejci, R. Schuster, S. Kleindorfer, K. Kotrschal, D. Frigerio, Matthias-Claudio Loretto
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引用次数: 1

Abstract

Summary Understanding space use of endangered species is critical for conservation planning and management. The advances in technology and data analysis allow us to collect data with unprecedented quality and inform us about the movements and habitat use of individuals and groups. With only about 700 individuals left in the wild, the Northern Bald Ibis Geronticus eremita is currently categorised as ‘Endangered’. However, little is known about the movements of this avian species in relation to breeding and individual differences. Using GPS transmitters we studied the movements of 32 Northern Bald Ibis from a semi-wild free-flying colony at the Konrad Lorenz Research Center in Austria during 1–4 years per individual. We investigated how sex, age class, breeding and non-breeding season affect space use and site fidelity. We found that individuals consistently showed high site fidelity, adults more than juveniles, and space use was highly overlapping between individuals and over successive years. When moving between different areas birds used consistent flyways thereby avoiding direct routes over mountainous areas. Adults had more expansive space use during the breeding season as compared to the non-breeding season, while juveniles only showed a slight decrease during the non-breeding season. We found no sex differences regarding space use or site fidelity. Our results lead to a better understanding of how Northern Bald Ibis move through their environment and how they use foraging areas, roosting sites, and space in general that in turn can help to inform conservation management of extant colonies and reintroduction programmes for new colonies.
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濒临灭绝的北方秃头朱鹭的空间利用和场地保真度:年龄、季节和性别的影响
了解濒危物种的空间利用对保护规划和管理至关重要。技术和数据分析的进步使我们能够以前所未有的质量收集数据,并使我们了解个人和群体的活动和栖息地使用情况。目前,野生的北方秃头朱鹮(Geronticus eremita)只剩下700只左右,已被列为“濒危物种”。然而,人们对这种鸟类的迁徙与繁殖和个体差异的关系知之甚少。利用GPS发射器,我们研究了32只来自奥地利康拉德洛伦兹研究中心的半野生自由飞行种群的北方秃头朱鹮的运动,每只1-4年。研究了性别、年龄、繁殖期和非繁殖期对空间利用和场地保真度的影响。我们发现,个体始终表现出较高的站点保真度,成年个体比幼年个体更多,并且个体之间和连续年份的空间使用高度重叠。当在不同地区之间移动时,鸟类使用一致的飞行路线,从而避免在山区直接飞行。与非繁殖期相比,成虫在繁殖期对空间的利用更大,而幼虫在非繁殖期对空间的利用仅略有减少。我们发现在空间使用和场地保真度方面没有性别差异。我们的研究结果有助于更好地了解北朱鹮如何在其环境中移动,以及它们如何利用觅食区域、栖息地点和空间,从而有助于为现有种群的保护管理和新种群的重新引入计划提供信息。
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来源期刊
CiteScore
3.40
自引率
6.20%
发文量
50
审稿时长
>12 weeks
期刊介绍: Bird Conservation International is a quarterly peer-reviewed journal that seeks to promote worldwide research and action for the conservation of birds and the habitats upon which they depend. The official journal of BirdLife International, it provides stimulating, international and up-to-date coverage of a broad range of conservation topics, using birds to illuminate wider issues of biodiversity, conservation and sustainable resource use. It publishes original papers and reviews, including targeted articles and recommendations by leading experts.
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