La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Impact of miniaturized geolocators on barn swallow Hirundo rustica fitness traits
Auteurs :	Chiara Scandolara, Auteur ; Diego Rubolini, Auteur ; Roberto Ambrosini, Auteur ; Manuela Caprioli, Auteur ; Steffen Hahn, Auteur ; Felix Liechti, Auteur ; Andrea Romano, Auteur ; Maria Romano, Auteur ; Beatrice Sicurella, Auteur ; Nicola Saino, Auteur
Type de document :	Article
Dans :	Journal of Avian Biology (45(5) SEP 2014)
Article en page(s) :	417-423
Langues:	Anglais
Résumé :	Miniaturized light-level geolocators may revolutionise the study of avian migration. However, there are increasing concerns that they might negatively affect fitness. We investigated the impact of two miniaturized geolocator models (SOI-GDL2.10, deployed in 2010, and SOI-GDL2.11, deployed in 2011) on fitness traits of the barn swallow Hirundo rustica, one of the smallest migratory species to which geolocators have been applied to date. The 2011 model was lighter (by 0.09 g) and had a shorter light stalk compared to the 2010 model. Using data from 640 geolocator and 399 control individuals from three geographical populations, we found that geolocators reduced annual survival probabilities (control birds: 0.19-0.63; geolocator birds: 0.08-0.40, depending on year, sex, and how birds that lost the device were considered), with more markedly negative effects on females equipped with the 2010 model. In addition, among birds equipped with the 2010 model, onset of reproduction in the subsequent year was delayed (by

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