Post-fledging Dependence Period and Onset of Natal Dispersal in Bearded Vultures (<i>Gypaetus barbatus</i>): New Insights from GPS Satellite Telemetry

López‐López, Pascual; Gil, Juan Antonio; Alcántara, Manuel

doi:10.3356/jrr-13-00072.1

Cited by 20 publications

(20 citation statements)

References 29 publications

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“…After fledging, Sicilian Peregrine Falcons stayed very close to the natal cliff and explored small areas nearby. In agreement with the few studies on raptors recording PFPD distances between sex (Seaton et al 2008, López-López et al 2014), we did not find significant difference between females and males. The duration of post-fledging dependence period differs among raptor species, ranging from 143-231 days in the Bearded Vulture Gypaetus barbatus (López-López et al 2014) to 2-8 days in Lesser Kestrel Falco naumanni (Bustamante & Negro 1994).…”

Section: Discussionsupporting

confidence: 93%

“…In agreement with the few studies on raptors recording PFPD distances between sex (Seaton et al 2008, López-López et al 2014), we did not find significant difference between females and males. The duration of post-fledging dependence period differs among raptor species, ranging from 143-231 days in the Bearded Vulture Gypaetus barbatus (López-López et al 2014) to 2-8 days in Lesser Kestrel Falco naumanni (Bustamante & Negro 1994). It likely does not only depend on body-size and/or lifespan, as it lasts longer in the smaller, magpie-size New Zealand Falcon Falco novaeseelandiae (76 days, Seaton et al 2008), than in larger species like the Osprey Pandion haliaetus (18-46 days, Bustamante 1995) or the Black Kite Milvus migrans (15-36 days, Bustamante & Hiraldo 1989).…”

Section: Discussionsupporting

confidence: 93%

“…Many raptor species, from small kestrels to large vultures, have been reported to exhibit great individual variation in the timing of dispersal (e.g. Bustamante & Hiraldo 1989, Bustamante & Negro 1994, Walls & Kenward 1998, López-López et al 2014. In our study, Peregrine Falcons travelled relatively short median distances of some 25 km, but showed large individual variation.…”

Section: First Winteringmentioning

confidence: 41%

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Onset of natal dispersal in Peregrine Falcon from Mediterranean islands (Italy)

et al. 2018

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Basic information on natal dispersal of Peregrine Falcons is virtually lacking in Europe, despite increased attention on this species, and the sensitivity of this stage in the Peregrines’ life history. In this study, we collected satellite telemetry data during the onset of natal dispersal of 19 Peregrine Falcons tagged in Sicily and the Aeolian archipelago (Italy). We divided the onset of dispersal into the following 3 periods: post-fledging dependence period (PFDP), wandering, and wintering. PFDP lasted on average 47±16 days, during which young peregrines moved very little (0.167 km), and explored small areas (0.226 km2) far from the nest cliff, and showed no sex differences. The wandering phase was highly individualistic, with median net displacements of 23.97 km. Both PFDP and wandering bearings were oriented towards NNE-ESE. Only five individuals went sporadically outside the island borders. During their first winter, Peregrines had a mean home range of 135.65±82.31 km2 spatially scattered across Sicily and mainly composed of open habitats, like cereal steppes, arboreal crops and agri-mosaics. Individuals had a dissimilar assortment in habitat composition, however the urban habitat was the most selected and the woodland the least. At night, during both wandering and wintering phases Peregrines used rocks, cliffs and electricity pylons in frequencies not statistically different between sex, phase and type of roost. Only two individuals had significant use of pylons and one of rocks. The multifaceted framework of Peregrine Falcon’s natal dispersal was described here for the first time in a Mediterranean population.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionsupporting

confidence: 93%

Section: First Winteringmentioning

confidence: 41%

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Onset of natal dispersal in Peregrine Falcon from Mediterranean islands (Italy)

et al. 2018

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“…During the following months, they will wander over extensive areas, and they must learn to become self-sufficient, acquire flight skills, find food resources, and exploit them efficiently. This period is, therefore, critical for survival (Margalida et al 2013;Gil et al 2014;López-López et al 2014). Possibly as a consequence, we found that 2nd cy birds delayed start of primary moult until late in May, and only few birds were able to moult secondaries during the last month before the end of the moulting season, in winter.…”

Section: Discussionmentioning

confidence: 76%

The flight feather moult pattern of the bearded vulture (Gypaetus barbatus)

Zuberogoitia¹,

Gil²,

Martínez

et al. 2015

J Ornithol

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Moult is an extremely time-consuming and energy-demanding task for large birds. In addition, there is a trade-off between the time devoted to moulting and that invested in other activities such as breeding and/or territory exploration. Moreover, it takes a long time to grow a long feather in large birds, and large birds that need to fly while moulting cannot tolerate large gaps in the wing, but only one or two simultaneously growing feathers. As a consequence, large birds take several years to complete a full moult cycle, and they resume the moult process during suboptimal conditions. A clear example of this pattern is the Bearded Vulture (Gypaetus barbatus), which needs 2-3 years for changing all flight feathers. Here we describe the sequence, extent, and timing of moult of 124 Bearded Vultures in detail for the first time. We found that extent and timing of flight feather moult was different between age classes. Subadults (from 3rd to 5th calendar year)

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“…We also computed the distance covered in 1 h (using consecutive locations) and the distance from each location to the nest used the respective year. Finally, we computed the time budget as the frequency of movements throughout the day across the three different periods of the breeding season (López-López et al 2014b). All estimations of space use were calculated using the ''Animal Movement'' extension for ArcView 3.2 (Hooge and Eichenlaub 2000) and the Geospatial Modelling Environment software (Beyer 2012).…”

Section: Home Range Size and Spatial Parametersmentioning

confidence: 99%

Spatial ecology and habitat use of adult Booted Eagles (Aquila pennata) during the breeding season: implications for conservation

et al. 2016

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Fast-moving technological advances, such as satellite tracking technologies, are providing in-depth information of aspects of avian ecology hitherto unknown. In fact, detailed information about movement ecology and ranging behaviour of birds is important not only from the perspective of the basic ecology, but also from the conservation point of view. This is particularly important in European countries where agricultural intensification, land abandonment and the withdrawal of traditional management agro-forestry practices pose a threat to biodiversity. The Booted Eagle, likewise other forest raptors, is an adequate bioindicator of human-dominated agro-forestry Mediterranean landscapes in which low-intensity traditional agricultural practices still persist. Here, using a combination of an unbiased technology (i.e., GPS telemetry), a wide geographic extension of marked birds (all over Spain), and much larger sample size than in previous works, we provide the first quantitative assessment of the home range size and space use of the Booted Eagle by means of GPS satellite telemetry during the breeding season. Interestingly, our results revealed different levels of space use over the breeding season and showed that eagles perform long distance foraging movements (i.e., [20 km) from the nest throughout the breeding season. This resulted in larger home ranges than reported thus far, and, more interestingly, in an extremely eccentric topology of territories. Hence, management measures for conservation of forest raptors based on setting restrictions around nesting sites using buffer areas of arbitrary radii clearly results in large areas of eagles' home ranges laying outside ''restriction'' areas. Therefore, conservation measures should take into account the full range of agro-forestry habitats encompassed within the home range. Finally, our results support the claim that a large-scale management approach beyond the establishment of a closed network of protected areas such as the Natura 2000 network is necessary for the conservation of Mediterranean raptors.

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Post-fledging Dependence Period and Onset of Natal Dispersal in Bearded Vultures (Gypaetus barbatus): New Insights from GPS Satellite Telemetry

Cited by 20 publications

References 29 publications

Onset of natal dispersal in Peregrine Falcon from Mediterranean islands (Italy)

Onset of natal dispersal in Peregrine Falcon from Mediterranean islands (Italy)

The flight feather moult pattern of the bearded vulture (Gypaetus barbatus)

Spatial ecology and habitat use of adult Booted Eagles (Aquila pennata) during the breeding season: implications for conservation

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