Home range requirements in Bonelli’s eagle (Aquila fasciata): prey abundance or trophic stability?

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dc.contributor.authorMartínez Miranzo, Beatriz
dc.contributor.authorBanda Rueda, Eva Isabel
dc.contributor.authorAguirre de Miguel, José Ignacio
dc.date.accessioned2023-06-16T15:20:30Z
dc.date.available2023-06-16T15:20:30Z
dc.date.issued2019-10-28
dc.description.abstractPrey abundance is one of the limiting factors for establishment a home range. In particular, biomass abundance could act as a key element for generalist top predators, with wide prey type spectrum, for establishing their home ranges. We studied if biomass abundance may act as a limiting factor for the establishment of home range in a generalist top predator, Bonelli’s eagle (Aquila fasciata). We used GPS satellite data on breeding individuals over a 10-year period to deepen into home range behaviour. To quantify biomass abundance, we performed surveys at different periods of the year cycle for potential prey inside the home ranges and outside them. We checked if differences in biomass were identified between home ranges and potential adjacent areas. Also, annual and seasonal variation in biomass abundance may be recorded. Variations in biomass abundance among home range were detected but no annual or seasonal variation within home range was identified. Differences in biomass abundance were identified between each of the home range and their potential adjacent areas. Although biomass abundance is lower inside the home range, it remains stable throughout the year while strong fluctuations in biomass abundance were detected outside them. Our results show that Bonelli’s eagle may establish their home range based on permanent biomass stability (Trophic Stability Hypothesis) rather than great seasonal but unpredictable abundances. This approach may have strong implications for management conservation programs of territorial top generalist predators.
dc.description.abstractLa abundancia de presas es uno de los factores limitantes en el establecimiento de los territorios en muchas especies territoriales de animales. Utilizando datos de seguimiento satelital de una rapaz en peligro de extinción, el Águila de Bonelli, profundizamos en cómo la abundancia de biomasa puede afectar en el establecimiento de los territorios y la implicación que esto tiene en la conservación de la especie en Aragón, España. Nuestros resultados demuestran que esta rapaz establece su territorio buscando una disponibilidad estable de biomasa a lo largo del tiempo (hipótesis de la estabilidad trófica) en lugar de una abundancia de biomasa mayor pero fluctuante en el tiempo. Esta aproximación tiene importantes implicaciones en los programas de conservación de especies territoriales, como el Águila de Bonelli.
dc.description.departmentDepto. de Biodiversidad, Ecología y Evolución
dc.description.facultyFac. de Ciencias Biológicas
dc.description.refereedTRUE
dc.description.sponsorshipMinisterio de Economía y Competitividad (MINECO)
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/61635
dc.identifier.doi10.1007/s10344-019-1328-9
dc.identifier.issn1439-0574
dc.identifier.officialurlhttps://link.springer.com/article/10.1007/s10344-019-1328-9
dc.identifier.urihttps://hdl.handle.net/20.500.14352/6413
dc.issue.number85
dc.journal.titleEuropean Journal of Wildlife Research
dc.language.isoeng
dc.publisherSpringer
dc.relation.projectID(CGL2017-85637-P)
dc.rights.accessRightsrestricted access
dc.subject.cdu574
dc.subject.cdu598.279.2
dc.subject.keywordBonelli’s eagle
dc.subject.keywordhome range establishment
dc.subject.keywordtrophic behaviour
dc.subject.keywordbiomass availability
dc.subject.keywordprey survey
dc.subject.keywordspatial ecology
dc.subject.ucmAves
dc.subject.ucmEcología (Biología)
dc.subject.unesco2401.20 Ornitología
dc.subject.unesco2401.06 Ecología animal
dc.titleHome range requirements in Bonelli’s eagle (Aquila fasciata): prey abundance or trophic stability?
dc.typejournal article
dc.volume.number65
dspace.entity.typePublication
relation.isAuthorOfPublicationbb641627-9efa-45fa-a1c4-1b80bf5153bf
relation.isAuthorOfPublication.latestForDiscoverybb641627-9efa-45fa-a1c4-1b80bf5153bf
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