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Article
Jose E. Martinez, Auteur ; Iñigo Zuberogoitia, Auteur ; José M. Escarabajal, Auteur ; Ester Cerezo, Auteur ; Jose F. Calvo, Auteur ; Antoni Margalida, AuteurCapsule: Differences in parental investment between sexes and stage of the breeding period were found in Bonelli’s Eagles Aquila fasciata.Aims: To describe the sexual differences in parental behaviour of Bonelli’s Eagles and to assess the sex-sp[...]
Article
Mario Leon-Ortega, Auteur ; Mercedes Gonzalez-Wangueemert, Auteur ; Jose E. Martinez, Auteur ; Jose F. Calvo, AuteurLittle information is available on the patterns of genetic connectivity in owls. We studied the genetic structure of the eagle owl Bubo bubo (Linnaeus, 1758) in southeastern Spain at two different spatial scales. Seven microsatellites previously[...]
Article
Antonio J. Garcia-Fernandez, Auteur ; Jose F. Calvo, Auteur ; Emma Martinez-Lopez, Auteur ; Pedro Maria-Mojica, Auteur ; Jose E. Martinez, AuteurInitial studies on the pressure from environmental contaminants on raptor populations in Spain date back to the 1980s, and they have been carried out from a range of viewpoints using a range of sentinel raptor species. However, there is no natio[...]
Article
Jose A. Martinez, Auteur ; Jose F. Calvo, Auteur ; Jose E. Martinez, Auteur ; Iñigo Zuberogoitia, Auteur ; Jabi Zabala, Auteur ; Stephen M. Redpath, AuteurBonelli's Eagle Hieraaetus fasciatus is one of the most endangered birds of prey in Europe. Despite mounting interest and research, several questions regarding the conservation implications of territory occupancy and site-dependent population re[...]
Article
Jose E. Martinez, Auteur ; Jose A. Martinez, Auteur ; Iñigo Zuberogoitia, Auteur ; Jabi Zabala, Auteur ; Stephen M. Redpath, Auteur ; Jose F. Calvo, AuteurWe examine the large-scale spatial distribution and the intra- and interspecific interactions in a cliff-nesting raptor community of a semi-arid Mediterranean area in southeastern Spain. The study community was composed of four top avian cliff-n[...]
Article
Maria V. Jimenez-Franco, Auteur ; Jose E. Martinez, Auteur ; Iluminada Pagan, Auteur ; Jose F. Calvo, AuteurTerritory fidelity defines a process in which individuals reoccupy a territory during different reproductive periods. In this study, we used generalized linear mixed models to analyse the territory fidelity of the Booted Eagle Hieraaetus pennatu[...]
Article
Jose E. Martinez, Auteur ; Iluminada Pagan, Auteur ; Jose F. Calvo, AuteurDuring a 7-year research project in a forested area of southeastern Spain, we studied territorial occupancy and reproductive success in a Booted Eagle Hieraaetus pennatus population. We monitored 65 territories, gathering information on 406 occu[...]
Article
Jose A. Martinez, Auteur ; Jose E. Martinez, Auteur ; Santi Mañosa, Auteur ; Iñigo Zuberogoitia, Auteur ; Jose F. Calvo, AuteurThe Eagle Owl Bubo bubo, which feeds mainly on rabbits and partridges, has been persecuted widely for causing damage to game interests. Although it is a protected species throughout Europe, there is a noteworthy gap in the scientific literature [...]
Article
Jose E. Martinez, Auteur ; Iluminada Pagan, Auteur ; Jose F. Calvo, AuteurA population of booted eagles (Hieraaetus pennatus) consisting of 21-29 pairs was studied for 7 years (1998-2004) in a forested mountainous region of southeastern Spain. The average egg-laying time was 25 April (earliest 31 March, latest 26 May)[...]
Article
Jabi Zabala, Auteur ; Iñigo Zuberogoitia, Auteur ; Jose A. Martinez-Climent, Auteur ; Jose E. Martinez, Auteur ; Ainara Azkona, Auteur ; Sonia Hidalgo, Auteur ; Agurtzane Iraeta, AuteurWe censused a population of Little Owls in Biscay (North Iberian Peninsula) using playback calls. We modelled their distribution using Geographic Information System (GIS), extracting data on land use and landscape composition in occupied and uno[...]
Article
Iñigo Zuberogoitia, Auteur ; Jose E. Martinez, Auteur ; Antoni Margalida, Auteur ; Imanol Gomez, Auteur ; Ainara Azkona, Auteur ; Jose Antonio Martinez, AuteurIn natural conditions, Griffon Vultures typically show shy behaviour and escape by flying if approached by humans. According to the state-dependent foraging theory, Griffon Vultures should modify their foraging behaviour depending on food availa[...]
Article
Vincenzo Penteriani, Auteur ; Maria M. Delgado, Auteur ; Juan M. Perez-Garcia, Auteur ; Francisco Botella, Auteur ; Santiago Garcia, Auteur ; Jose A. Sanchez Zapata, Auteur ; Mario L. Ortega, Auteur ; Jose E. Martinez, Auteur ; Jose F. Calvo, Auteur ; Joaquin Ortego, Auteur ; Giulia Penteriani, Auteur ; Mario Melletti, Auteur ; Igor Krugersberg, Auteur ; Olga M. Talavera, AuteurHatching asynchrony in altricial bird species occurs if incubation starts before clutch completion. It determines differential within-brood growth, which may result in a competitive and developmental hierarchy among siblings. As a consequence, a[...]
Article
Iñigo Zuberogoitia, Auteur ; Beatriz Arroyo, Auteur ; Barry O'Donoghue, Auteur ; Jabi Zabala, Auteur ; Jose A. Martinez, Auteur ; Jose E. Martinez, Auteur ; Stephen G. Murphy, AuteurWing tags have been used on many bird species to facilitate individual recognition, although tags are not only conspicuous for humans but may also attract the attention of potential predators. During a Peregrine Falcon Falco peregrinus monitorin[...]
