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La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Stopover duration, movement patterns and temporary home ranges of fall migrant yellow-rumped warblers Setophaga coronata in native and anthropogenic woodlands of the Northern Prairie region, USA
Auteurs :	Ming Liu, Auteur ; David L. Swanson, Auteur
Type de document :	Article
Dans :	Journal of Avian Biology (46(5) SEP 2015)
Article en page(s) :	452-461
Langues:	Anglais
Résumé :	Stopover behavior of migrant birds is influenced by their energetic condition, but also by extrinsic factors, including weather conditions and habitat attributes such as vegetation structure, microclimates, predation pressure, competition, and food availability. Anthropogenic habitats may differ from natural habitats in these attributes, which could promote differing stopover behaviors for migrants in the two habitat types and affect overall habitat suitability. We used radio-telemetry to measure stopover behaviors of fall migrant yellow-rumped warblers Setophaga coronata in native riparian corridor woodlands (corridors) and anthropogenic woodlots (woodlots) in the Northern Prairie region. We measured stopover duration, movement rate, and temporary home range size for birds in both habitat types by attaching radio-transmitters and relocating birds to either corridor (n = 17) or woodlot (n = 16) study sites. We used AIC(C) to rank null, global, and reduced models, which included habitat type, energetic condition, habitat size, year, date, and movement rate (for stopover duration analyses only) as explanatory variables. Model rankings showed that habitat type was not included in any of the top models (Delta AIC(C)

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