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Documents disponibles écrits par cet auteur (21)
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Article
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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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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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 ; 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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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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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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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[...]
Article
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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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 ; Juan I. Dean, Auteur ; Antonio Vilches, Auteur ; Daniel Alonso, Auteur ; Agustin Mendiburu, AuteurCapsule Counting and mist-netting provided different estimates of abundance. Aims To compare the efficiency, constraint and bias of mist-netting versus line transects for the estimation of species richness and abundance of passerines. Methods Mi[...]
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Juan Arizaga, Auteur ; Juan I. Dean, Auteur ; Antonio Vilches, Auteur ; Daniel Alonso, Auteur ; Agustin Mendiburu, AuteurCapsule Counting and mist-netting provided different estimates of abundance. Aims To compare the efficiency, constraint and bias of mist-netting versus line transects for the estimation of species richness and abundance of passerines. Methods Mi[...]
Article
Daniel Alonso, Auteur ; Juan Arizaga, Auteur ; Rafael Miranda, Auteur ; M. Ángeles Hernández, AuteurTwo subspecies of Common Crossbill Loxia curvirostra are currently accepted to be present in Iberia and the Balearics: L.c. curvirostra and L.c. balearica. Nonetheless, some populations in S Iberia are yet to be known, especially regarding their[...]
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Juan Arizaga, Auteur ; Agustin Mendiburu, Auteur ; Daniel Alonso, Auteur ; Juan E. Cuadrado, Auteur ; Jose I. Jauregi, Auteur ; José M. Sánchez, AuteurIberia receives many dispersing, migrating and wintering Common Kingfishers Alcedo atthis. The majority of these individuals occur in coastal marshes. Between August and mid-October 2007 and 2008, Kingfishers were mist-netted at a tidal marsh in[...]
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Daniel Alonso, Auteur ; Juan Arizaga, Auteur ; Rafael Miranda, Auteur ; Francisco Campos, Auteur
Article
Miriam Hernandez, Auteur ; Daniel Alonso, Auteur ; Juan Arizaga, Auteur ; Ana Amezcoa, Auteur ; Fernando Alda, Auteur ; Ainhoa Murua, Auteur ; Paul-Christoph Schroder, Auteur ; Francisco Campos, Auteur
Article
Juan Arizaga, Auteur ; Daniel Alonso, Auteur ; Keith A. Hobson, AuteurSpecialist foragers depend on specific prey commonly associated with limited habitat, which is often patchily distributed. Understanding how specialists use habitat patches is important to their conservation. Crossbills (Loxia spp.) are one of t[...]
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Daniel Alonso, Auteur ; Juan Arizaga, AuteurThe impact of nomadism on animal population dynamics (e.g. survival) is poorly understood. This factor is not inconsequential because our current view on animal survival rates could suffer from biases if it is ignored. The degree of nomadism in [...]
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Juan Arizaga, Auteur ; Daniel Alonso, Auteur ; Jose A. Cortés, Auteur ; Ton Eggenhuizen, Auteur ; Julien Foucher, Auteur ; Dieter Franz, Auteur ; Javier García, Auteur ; Fred Koning, Auteur ; Michel Leconte, Auteur ; Hamid Rguibi, Auteur ; Thijs Valkenburg, Auteur ; Pablo Vera, Auteur ; Keith A. Hobson, AuteurUnderstanding the migratory connectivity of migrant species is fundamental to their effective conservation. Analysis of individual traits that can vary geographically, such as biometrics and stable isotopic values of tissues, can help establish [...]
Article
Juan Arizaga, Auteur ; Daniel Alonso, AuteurBluethroats Luscinia svecica azuricollis breeding in Spain belong to a poorly known endemic subspecies that is restricted to a relatively small distribution range. We aimed to present information on some basic life-history parameters from a popu[...]
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Juan Arizaga, Auteur ; Francisco Campos, Auteur ; Daniel Alonso, AuteurLong-distance migrants have a more pointed and concave wing than short-distance migrants. These pointed and concave wings are thought to minimize the energy-cost of flight. Detailed analyses of wing morphology among populations might therefore o[...]
