La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Social foraging and habitat use by a long-distance passerine migrant, Whinchat Saxicola rubetra, at a spring stopover site on the SE Adriatic coast
Auteurs :	Ursa Koce, Auteur ; Damijan Denac, Auteur
Type de document :	Article
Dans :	Journal of Ornithology (151(3) JUL 2010)
Article en page(s) :	655-663
Langues:	Anglais
Résumé :	The preference for foraging in groups and the effect of physiognomic factors of a habitat on its use by foraging Whinchats (Saxicola rubetra) was studied during spring migration stopover in a mosaic cultural landscape at the SE Adriatic coast. Every record of spatially distinct Whinchats, either a solitary individual or a group, was referred to as a Whinchat unit. The units were classified as intensively foraging, less intensively foraging or non-foraging and divided into four size classes. The effect of physiognomic habitat factors on use of habitat by foraging Whinchat units was modelled. All possible additive models using logit link function were constructed from five independent physiognomic variables: (1) natural perches (NP), (2) artificial perches (AP), (3) high herbal vegetation (HHV), (4) open bushes (OB) and (5) heterogeneity of vegetation types (HVT). Variables HHV and OB were included simultaneously in the models. Models that were substantially supported by the data were selected according to second order Akaike's information criterion AIC(c). Two such models contained variable(s) (1) NP and (2)

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