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Documents disponibles écrits par cet auteur (59)
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Article
Juan Arizaga, Auteur ; Jordi Castilló, Auteur ; Pere Josa, AuteurDans Ardea (113(2) 2025)
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Raphaël Musseau, Auteur ; Léna Collet, Auteur ; Nere Zorrozua, Auteur ; Bruno Bargain, Auteur ; Hubert Dugué, Auteur ; Pascal Provost, Auteur ; Alain Chartier, Auteur ; Edorta Unamuno, Auteur ; Olivier Dehorter, Auteur ; Philippe Fontanilles, Auteur ; Pierre-Yves Henry, Auteur ; Juan Arizaga, AuteurSedge Warblers Acrocephalus schoenobaenus that stopover along the Atlantic flyway refuelled at varying rates, depending on age, initial body condition and latitude; refuelling rates were poorly structured among sites, suggesting a broad capacity[...]
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Gorka Belamendia, Auteur ; Antonio Sáenz de Santa María, Auteur ; Juan Arizaga, AuteurLong-term monitoring revealed density-dependent regulation of a recovering population of White Storks in northern Spain. To analyse long-term changes in the population size, productivity and colony dynamics of the White Stork at the northern edg[...]
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Aitor Galarza, Auteur ; Juan Arizaga, Auteur ; Mar del Arco, Auteur ; Javier Elorriaga, Auteur ; Edorta Unamuno, Auteur ; Iñigo Zuberogoitia, AuteurAu cours des dernières décennies, la population de Balbuzards pêcheurs en Europe a augmenté et s'est étendue, en partie grâce à des réintroductions. Entre 2013 et 2017, un programme de réintroduction a été mené dans le golfe de Gascogne. Nous dé[...]
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Blanca Fernández-Eslava, Auteur ; Daniel Alonso, Auteur ; David Galicia, Auteur ; Juan Arizaga, AuteurCarotenoid-based ornamentation can vary greatly among individual birds of the same population. This variability might consider the timing and duration of moult. Crossbills (genus Loxia) show large variation in their colour patterns, ranging from[...]
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Blanca Fernández-Eslava, Auteur ; Daniel Alonso, Auteur ; David Galicia, Auteur ; Juan Arizaga, AuteurThe study of moult has received increased scientific attention due to its interdependence with other life-history aspects and its value as a reliable proxy of a bird's fitness. Here, we perform a detailed description of post-juvenile partial mou[...]
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Juan Arizaga, Auteur ; Arine Crespo, Auteur ; Agurtzane Iraeta, AuteurVolunteer-based (i.e., citizen science) monitoring schemes constitute a basic piece for the long-term monitoring of bird populations. This work aims to determine whether we can reduce the sampling effort, in terms of number of sampling journeys [...]
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Blanca Fernández-Eslava, Auteur ; Daniel Alonso, Auteur ; David Galicia, Auteur ; Juan Arizaga, AuteurCarotenoid staining has been repeatedly shown to serve as a sexually selected individual quality signal. In different species, individuals that show brighter carotenoid-based signals have been found to have superior feeding abilities, recover fa[...]
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Juan Arizaga, Auteur ; Marcelo Brongo, Auteur ; Luis Romero, Auteur ; Juan F. Cuadrado, Auteur ; David Giralt, Auteur ; Francesc Sarda-Palomera, Auteur ; Sergi Sales, Auteur ; Gerard Bota, Auteur
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Sergio Delgado, Auteur ; Asier Aldalur, Auteur ; Alfredo Herrero, Auteur ; Juan Arizaga, AuteurImportant biological parameters, such as movement and survival, can differ substantially between sexes, driving the demographic patterns of a population. Sex-dependent spatial segregation at the foraging grounds can evolve as a mechanism to redu[...]
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Frank J. N. D'Amico, Auteur ; Claire Kermorvant, Auteur ; José M. Sánchez, Auteur ; Juan Arizaga, AuteurCapsule: Linear censusing and occupancy models based on fixed sampling points are alternative widely used techniques to determine bird densities in riparian ecosystems, although it cannot be always properly executed. Aims: The aim is to assess t[...]
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Blanca Fernández-Eslava, Auteur ; Daniel Alonso, Auteur ; David Galicia, Auteur ; Juan Arizaga, AuteurSuspended moult is a relatively common phenomenon in birds, but it has remained relatively ignored for a long time in studies dealing with moulting process. Furthermore, the new and increasing number of models used to estimate moult duration sys[...]
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Juan Arizaga, Auteur ; Maite Laso, Auteur ; Iñaki Aranguren, Auteur ; Javier Goikoetxea, Auteur ; Jose I. Jauregi, Auteur ; Jon Martínez, Auteur ; José M. Sánchez, AuteurTransients can have a severe impact on demographic parameter estimates. For instance, the use of visual counts or number of captures at a ringing station to assess indices of abundance may result in biased over-estimates due to the presence of t[...]
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Juan Arizaga, Auteur ; Daniel Alonso, Auteur ; Arine Crespo, Auteur ; Xabier Esparza, Auteur ; Efrén Fernández, Auteur ; Iñigo López, Auteur ; David Martín, Auteur ; Antonio Vilches, AuteurThe dynamics and structure of many bird communities are changing due to the global warming and changes in the land use and management. The Ebro Valley constitutes one of the chief wintering areas for several passerine species in Iberia, and the [...]
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Diego Villanua, Auteur ; David Campión, Auteur ; Miguel M. Elósegi, Auteur ; Juan Arizaga, AuteurDetermining the age of specimens is of great help in wildlife management, especially for rare or threatened species in which each individual has a high value. In birds, differences in moulting pattern between juveniles and adults may in some cas[...]
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Nerea Prieto, Auteur ; Giacomo Tavecchia, Auteur ; Ibon Telletxea, Auteur ; Ruben Ibañez, Auteur ; Fermin Ansorregi, Auteur ; Aitor Galdos, Auteur ; Aitzol Urruzola, Auteur ; Ixtoan Iriarte, Auteur ; Juan Arizaga, AuteurThe management of game species relies on robust estimates of hunting-related mortality. A relative measure of this mortality can be obtained by comparing survival estimates of animals across similar areas with different hunting pressures. We con[...]
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Antonio Vilches, Auteur ; Rafael Miranda, Auteur ; Juan Arizaga, Auteur
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Svana Rogalla, Auteur ; Juan Arizaga, AuteurDuring migration, birds often need to gain large fuel loads, especially if they must cross large geographic bafflers with poor or absent fuelling opportunities. The Willow Warbler is a songbird associated with woodland that also opportunisticall[...]
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Juan Arizaga, Auteur ; Jaime Resano‐Mayor, Auteur ; Diego Villanua, Auteur ; Daniel Alonso, Auteur ; Juan M. Barbarin, Auteur ; Alfredo Herrero, Auteur ; Jesús M. Lekuona, Auteur ; Ricardo Rodríguez, AuteurOpen landfills seem to be playing an increasing role as target feeding areas for several species, not only in their breeding areas or during the winter, but also during the migration period. Evaluating the extent to which landfill sites are used[...]
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Nadja Weisshaupt, Auteur ; Adriaan M. Dokter, Auteur ; Juan Arizaga, Auteur ; Mercedes Maruri, AuteurCapsule: Nocturnal passerine migration patterns were studied by a network of weather radars within the East-Atlantic flyway providing large-scale information on the effect of a geographical barrier.Aims: The aim of this study was to obtain a lar[...]
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Juan Arizaga, Auteur ; Daniel Alonso, Auteur ; Alberto Castro, AuteurWe explored whether habitat characteristics surrounding the song posts that male Bluethroats (Luscinia svecica) use to attract females and defend their territoriesmight be associated withmales'quality, in terms of body condition and age (used he[...]
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Sergio Delgado, Auteur ; Juan Arizaga, AuteurCapsule: Pre-fledging survival in a Yellow-legged Gull Larus michahellis population in northern Iberia is negatively correlated to hatching date.Aims: To explore which factors have more importance in determining the pre-fledging daily survival r[...]
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Daniel Alonso, Auteur ; Juan Arizaga, Auteur ; Christoph M. Meier, Auteur ; Felix Liechti, AuteurCommon Crossbill (Loxia curvirostra) populations are dependent on specific key conifer species for their primary food supply, but many of these conifers standardly show irregular cone crop production. Consequently, the species has evolved a noma[...]
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José M. Sánchez, Auteur ; Jose I. Jauregi, Auteur ; Javier Goikoetxea, Auteur ; Iñaki Aranguren, Auteur ; Juan Arizaga, AuteurCapsule: There were only weak effects of winter flooding episodes on apparent annual survival of a White-throated Dipper breeding population in northern Iberia.Aims: To test whether extreme winter flooding episodes affected survival in a breedin[...]
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Nadja Weisshaupt, Auteur ; Mercedes Maruri, Auteur ; Juan Arizaga, AuteurCapsule: Bird migration was recorded by an infrared device at three sites in the southeastern Bay of Biscay, indicating seasonal east–west differences in migration flow.Aims: The main aims of this study were to quantify and describe nocturnal mi[...]
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Aitor Galarza, Auteur ; Fernando Arce, Auteur ; Juan G. Navedo, Auteur ; Juan Arizaga, AuteurWe studied the movements of little egrets Egretta garzetta from breeding colonies in northern Spanish Atlantic estuaries using sighting data of colour-ringed birds. Data on 304 resightings of 95 out of 457 little egrets ringed as chicks in two c[...]
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Juan Arizaga, Auteur ; Steven L. Van Wilgenburg, Auteur ; Daniel Alonso, Auteur ; Jose A. Cortés, Auteur ; Michel Leconte, Auteur ; Hamid Rguibi, Auteur ; Thijs Valkenburg, Auteur ; Pablo Vera, Auteur ; Keith A. Hobson, AuteurCapsule: Stable isotope analyses reveal some degree of migratory connectivity of Bluethroat populations wintering from Iberia to West Africa. Aims: To identify the probable breeding origins of Bluethroats wintering from Iberia to Senegal. Method[...]
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Juan Arizaga, Auteur ; Steven L. Van Wilgenburg, Auteur ; Daniel Alonso, Auteur ; Jose A. Cortés, Auteur ; Michel Leconte, Auteur ; Hamid Rguibi, Auteur ; Thijs Valkenburg, Auteur ; Pablo Vera, Auteur ; Keith A. Hobson, AuteurCapsule: Stable isotope analyses reveal some degree of migratory connectivity of Bluethroat populations wintering from Iberia to West Africa.Aims: To identify the probable breeding origins of Bluethroats wintering from Iberia to Senegal.Methods:[...]
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Amaia Ortiz de Elgea, Auteur ; Juan Arizaga, AuteurCapsule: Common sandpipers stopping over in a tidal marsh in northern Iberia during the autumn migration period showed a moderate mean fuel load and low fuel deposition rate, but relatively long stopover periods, suggesting a ‘hopping’ strategy [...]
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Olga Jordi, Auteur ; Juan Arizaga, AuteurCapsule: Chick growth rates was sex-dependent in an Atlantic Yellow-legged Gull Larus michahellis population.Aims: To describe the growth rate of Yellow-legged Gull chicks and sex-associated variations, and obtain a discriminant function to sex [...]
