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Documents disponibles écrits par cet auteur (6)
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Article
M. A. Farfan, Auteur ; J. Duarte, Auteur ; R. Real, Auteur ; J. M. Vargas, AuteurThe proliferation of infrastructure projects, such as highways, railways and canals, is having an unavoidable impact on local fauna (habitat destruction and fragmentation, the barrier effect or mortality by collision). The infrastructure constru[...]
Article
A. R. Munoz, Auteur ; R. Real, Auteur ; J. Olivero, Auteur ; A. L. Marquez, Auteur ; J. C. Guerrero, Auteur ; S. B. Barcena, Auteur ; J. M. Vargas, AuteurWe studied the geographic ranges of the 23 African hornbill species using countries as distribution units, to search for either groups of similar distributions (chorotypes) or gradual replacement of species as two different types of distribution[...]
Article
A. Villegas, Auteur ; J. M. S. Guzman, Auteur ; C. Corbacho, Auteur ; P. Corbacho, Auteur ; J. M. Vargas, AuteurThe Bald Ibis (Geronticus eremita) is one of the world's most threatened species of birds. The number of individuals in captivity is several times greater than the number of individuals in the wild, so that the re-introduction of individuals fro[...]
Article
J. Olivero, Auteur ; R. Real, Auteur ; J. M. Vargas, AuteurWe developed a new method of testing whether spatial change in species composition follows a gradual or discrete pattern. To do this, we first divided Europe into regions based on 55 river basins. We then tested similarity of waterbird species a[...]
Article
J. M. Vargas, Auteur ; M. A. Farfan, Auteur ; J. C. Guerrero, Auteur ; A. M. Barbosa, Auteur ; R. Real, AuteurIn Andalusia, southern Spain, each game estate applies its own rules and presents its results in annual hunting reports, which have been mandatory for Spanish game estates since 1989. We used the information about hunting yields, included in 321[...]
Article
C. Marquez, Auteur ; J. M. Vargas, Auteur ; R. Villafuerte, Auteur ; J. E. Fa, AuteurIn many parts of the world, illegal poisoning of wild predators has increased abruptly in recent decades. Birds of prey and carnivores have been targeted directly or indirectly if these are perceived to impact game species or domestic animals. N[...]
