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Documents disponibles écrits par cet auteur (6)
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Article
Mark C. Drever, Auteur ; Luis M. Bautista-Sopelana, Auteur ; Juan C. Alonso, Auteur ; Juan G. Navedo, Auteur ; Markus Hrachowitz, AuteurThe migration of birds through a stopover site may be understood as a physical process of hydrological flow through a reservoir whose water levels rise and fall over a migration period. Hydrological flow models show promise as a way of integrati[...]
Article
Juan C. Alonso, Auteur ; Carlos Palacín, AuteurSince 2005, the world population of Great Bustards Otis tarda has decreased at an annual rate of 3.23%. The current world total is estimated at 31,000–36,000 birds, 34% (range 30–38%) less than 16 years ago. The declines have been observed in ni[...]
Article
Javier A. Alonso, Auteur ; Juan C. Alonso, Auteur ; Guenter Nowald, AuteurCapsule German breeding birds wintered mainly in southwest Spain and some in France. Aims To describe migration routes and phenology, and the interannual fidelity to staging and wintering sites. Methods A total of 93 cranes were colour-banded, a[...]
Article
Javier A. Alonso, Auteur ; Juan C. Alonso, AuteurThis publication reports the current status of the Common Crane in Western Europe with regard to the colour-marking carried out from 1985 to 1998. After numerous markings with long alphanumeric rings, the currently used three-colour coding is pr[...]
Article
Carlos A. Martín, Auteur ; Juan C. Alonso, Auteur ; Javier A. Alonso, Auteur ; Carlos Palacín, Auteur ; Marina Magana, Auteur ; Beatriz Martín, Auteur1. We investigated the causes of natal dispersal in four Spanish areas where 35 breeding groups of the polygynous great bustard Otis tarda were monitored intensively. A total of 392 juveniles were radio-tracked between 1991 and 2006 by ground an[...]
Article
Carlos A. Martín, Auteur ; Juan C. Alonso, Auteur ; Javier A. Alonso, Auteur ; Carlos Palacín, Auteur ; Marina Magana, Auteur ; Beatriz Martín, AuteurWe explored sex-biased mortality patterns in a species showing the most extreme sexual dimorphism among birds, the great bustard Otis tarda. Between 1991 and 2005 we studied juvenile and immature Survival in a sample of 361 great bustards radio-[...]
