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Regional and age-dependent differences in the effect of wind on the mi^ratorv routes of Eleonora＇s falcon

Current Zoology 2015年第3期61卷 428-434页

作者： ugo mellone rube.liminan pascual lopez-lopez vicente urios Vertebrates Zoology Research Group Departamento de Ciencias Ambientales y Recursos Naturales University of Alicante Apdo. 99 E-03080 Alicante Spain

During migration, birds can show different responses to wind in relation to distance to the goal, experience, ecologi- cal barriers and visibility of landmarks. We analysed the effect of wind （tailwinds and crosswinds） on daily movement rates （for- ward and perpendicular） of Eleonora＇s falcons using ARGOS satellite telemetry, during their trans-continental autumn migration to Madagascar, in relation to the different crossed regions and individuals＇ age class. Our results showed that the effect of wind on daily movement rates was not uniform, being stronger in the farthest region from the migration goal, the Sahara desert, with adults being more affected than juveniles in this region. In the Sahel, the results were more conflicting, perhaps because daily movements were more shaped by the distribution of food resources. In Equatorial Africa, daily movement rates were mainly af- fected by crosswinds. Still, it remains unclear which orientation mechanism allows Eleonora＇s falcons to reach such a narrow wintering area compensating also for wind displacement

关键词： Migration Raptors Africa Wind Drift Satellite Telemetry Orientation

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Wind effects on the migration routes of trans-Saharan soaring raptors： geographical, seasonal, and interspecific variation

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Current Zoology 2016年第2期62卷 89-97页

作者： Javier VIDAL-MATEO ugo mellone pascual lopez-lopez Javier De LA PUENTE clara GARCIA-RIPOLLES Ana BERMEJO vicente urios Vertebrates Zoology Research Group Departamento de Ciencias Ambientales y Recursos Naturales Universityof Alicante Apdo. 99 E-03080 Alicante Spain SEO/BirdLife Area de Estudio y Seguimiento de AyesC/Melquiades Biencinto 34 E-28053 Madridl Spain

Wind is among the most important environmental factors shaping birds＇ migration patterns. Birds must deal with the displacement caused by crosswinds and their behavior can vary according to different factors such as flight mode, migratory season, experience, and distance to goal areas. Here we analyze the relationship between wind and migratory movements of three raptor species which migrate by soaring-gliding flight： Egyptian vulture Neophron percnopterus, booted eagle Aquila pennata, and short-toed snake eagle Circaetus gallicus. We analyzed daily migratory segments （i.e., the path joining consecutive roosting locations） using data recorded by GPS satellite telemetry. Daily movements of Egyptian vultures and booted eagles were significantly affected by tailwinds during both autumn and spring migrations. In contrast, daily movements of short-toed eagles were only significantly affected by tailwinds during autumn migration. The effect of crosswinds was signifi- cant in all cases. Interestingly, Egyptian vultures and booted eagles showed latitudinal differences in their behavior： both species compensated more frequently at the onset of autumn migration and, at the end of the season when reaching their wintering areas, the proportion of drift segments was higher. In contrast, there was a higher drift at the onset of spring migration and a higher compensation at the end. Our results highlight the effect of wind patterns on the migratory routes of soaring raptors, with different outcomes in relation to species, season, and latitude, ultimately shaping the loop migration patterns that current tracking techniques are showing to be widespread in many long distance migrants.

关键词： Neophmn percnopterus Aquila pennata Circaetus gallicus wind drift satellite telemetry migration

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Birds on the move： Special column on bird movement

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Current Zoology 2014年第5期60卷 602-603页

作者： Giuseppe BOGLIANI ugo mellone Guest Editors Department of Earth and Environmental Sciences University of Pavia 27100 Pavia Italy bogliani@unipv.it Vertebrates Zoology Research Group Departamento de Ciencias Ambientales University of Alicante ES-03690 San Vicente del Raspeig Alicante Spain u.mellone@***

Studying movements is essential for shedding light on a number of issues related to avian biology： behavioral aspects such as foraging, migratory routes and strategies, navigation and orientation mechanisms; ecological aspects such as metapopulation dynamics, insular biogeography, seed dispersal, disease spread; conservation biology such as the effects of habitat fragmentation, identification of key areas deserving protection, effects of climate change. Despite these relevant issues, the topic of ＂Movement ecology＂ on its own has only been highlighted recently （Nathan et al., 2008）;although, the investigation of animal movements has always been one of the most fascinating topics for any zoologist and often is also quite a difficult task.

关键词：运动鸟类保护生物学移动生物地理学迁徙路线定位机制种群动态

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