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Documents disponibles écrits par cet auteur (6)
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Article
Roger Jovani, Auteur ; Jesus M. Aviles, Auteur ; Francisco Rodriguez-Sanchez, AuteurMale and female European Robins Erithacus rubecula display their red breasts in year-round territorial contests. Despite the clear signalling role of the red breast, little is known about its sexual dimorphism or trends in size when Robins age. [...]
Article
Roger Jovani, Auteur ; Tomas Montalvo, Auteur ; Sara Sabate, AuteurFault bars are conspicuous malformations on bird feathers that are produced during feather growth. The causes of fault bars are poorly understood. In our study, we used the presence of Campylobacter jejuni infection in 302 urban feral pigeons (C[...]
Article
Roger Jovani, Auteur ; Javier Diaz-Real, AuteurGrowth bands and fault bars, widespread features of feathers that form during regeneration, have largely been studied independently. Growth bands result from normal regeneration: each pair of dark/light bands forms every 24 h. Fault bars are a r[...]
Article
Roger Jovani, Auteur ; Julio Blas, Auteur ; Carlos Navarro, Auteur ; Francois Mougeot, AuteurGrowth bands are alternate dark/light bands perpendicular to the feather rachis. Previous studies indicate that pairs of dark/light bands are grown every 24h, with light bands being produced at night, and dark ones during the day. Thus, the dark[...]
Article
Ismael Galvan, Auteur ; Eduardo Aguilera, Auteur ; Francisco Atienzar, Auteur ; Emilio Barba, Auteur ; Guillermo Blanco, Auteur ; Jose L. Canto, Auteur ; Veronica Cortes, Auteur ; Oscar Frias, Auteur ; Istvan Kovacs, Auteur ; Leandro Melendez, Auteur ; Anders P. Moller, Auteur ; Juan S. Monrós, Auteur ; Péter L. Pap, Auteur ; Ruben Piculo, Auteur ; Juan C. Senar, Auteur ; David Serrano, Auteur ; José L. Tella, Auteur ; Csongor I. Vágási, Auteur ; Matthias Voegeli, Auteur ; Roger Jovani, AuteurFeather mites are arthropods that live on or in the feathers of birds, and are among the commonest avian ectosymbionts. However, the nature of the ecological interaction between feather mites and birds remains unclear, some studies reporting neg[...]
Article
Roger Jovani, Auteur ; Holger Schielzeth, Auteur ; Roddy Mavor, Auteur ; Daniel Oro, AuteurAnimal collective patterns such as group size frequency distributions often show substantial intraspecific variation, suggesting low species-specific consistency. Here, we dissect intraspecific vs interspecific components of colony size variatio[...]
