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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
Inmaculada Abril-Colón, Auteur ; Juan Carlos Alonso, Auteur ; Carlos Palacín, Auteur ; José Manuel Álvarez-Martínez, Auteur ; Alberto Ucero, AuteurMigratory birds typically fly long distances in response to large-scale seasonal climate variation. However, most migratory species are partial migrants, and some fly only short distances, for example to take advantage of suitable feeding condit[...]
Article
Carolina Bravo, Auteur ; Carlos Ponce, Auteur ; Carlos Palacín, Auteur ; Juan Carlos Alonso, AuteurCapsule Arthropods are the most important diet component of Great Bustards Otis tarda in the first months of life. Aims To determine the diet composition of young Great Bustards in Spain. Methods The diet was estimated by stomach content analysi[...]
Article
Juan Carlos Alonso, Auteur ; Carlos Palacín, Auteur ; Alejandro Onrubia, Auteur ; Rachid Aboulouafae, Auteur ; Mohamed Amezian, Auteur ; Abdelaziz El Idrissi Essougrati, Auteur ; Rachid El Khamlichi, Auteur ; Mohamed Noaman, AuteurA Great Bustard Otis tarda survey carried out in spring 2015 in Morocco confirmed the decline of this highly endangered population. Bustards were only seen at two of the seven leks occupied ten years ago. The total number of birds counted was 40[...]
Article
Aurora Torres, Auteur ; Carlos Palacín, Auteur ; Javier Seoane, Auteur ; Juan Carlos Alonso, AuteurDue to the growing awareness of potential impacts of roads, managers demand well-designed studies about the implications of linear infrastructures on ecosystems. We illustrate the application of Before-During-After and Before-During-After-Contro[...]
Article
Carlos Palacín, Auteur ; Juan Carlos Alonso, Auteur ; Javier A. Alonso, Auteur ; Marina Magana, Auteur ; Carlos A. Martín, AuteurFactors responsible for individual variation in partial migration patterns are poorly known, and identifying possible causes of these changes is essential for understanding the flexibility in migratory behavior. Analyzing 190 life histories of g[...]
Article
Jose Luis Horreo, Auteur ; Juan Carlos Alonso, Auteur ; Carlos Palacín, Auteur ; Borja Mila, AuteurPatterns of genetic structure and gene flow among populations help us understand population dynamics and properly manage species of concern. Matrilineal mtDNA sequence data have been instrumental in revealing genetic structure at the intraspecif[...]
Article
Marina Magana, Auteur ; Juan Carlos Alonso, Auteur ; Javier A. Alonso, Auteur ; Carlos A. Martín, Auteur ; Beatriz Martín, Auteur ; Carlos Palacín, AuteurWe investigated the spatial arrangement of Great Bustard Otis tarda nests relative to leks in 55 females captured at four lek sites and radio-tracked through 1-6 years in a protected area in central Spain. Although females showed a tendency to n[...]
Article
Carlos Palacín, Auteur ; Juan Carlos Alonso, Auteur ; Carlos A. Martín, Auteur ; Javier A. Alonso, AuteurA detailed knowledge of the habitat requirements of steppe birds living in farmland habitats is necessary to identify agricultural practices compatible with their conservation. The globally threatened Great Bustard Otis tarda is a partial migran[...]
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 Palacín, Auteur ; Juan Carlos Alonso, AuteurTo document the population trend of the Little Bustard in north-west Africa, we performed an extensive literature review, and conducted six surveys in seven areas with potentially suitable habitat in north-western Morocco between 1999 and 2005. [...]
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-[...]
