La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Feather traits and ptilochronology as indicators of stress in Iberian Blackcaps Sylvia atricapilla (1999)
Auteurs :	R. Carbonell, Auteur ; J. L. Telleria, Auteur
Type de document :	Article
Dans :	Bird Study (46(Suppl.) 1999)
Article en page(s) :	243-248
Langues:	Anglais
Résumé :	This paper compares feather traits to explain differences in stress between three Blackcap Sylvia atricapilla populations distributed along a N-S gradient of increasing drought in the Iberian Peninsula. Indices based on the width of growth bars, length, mass and fluctuating asymmetry (FA) of rectrices were examined for age effects and variation between populations along the gradient. The growth bars of juveniles (but not adults), feather mass, mass/length ratio and FA varied between populations (narrower bars, lighter feathers and increasing FA in the southern populations), providing evidence of increasing stress of moult in Blackcaps of drier Iberian regions.

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