La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	When and where to fuel before crossing the Sahara desert - extended stopover and migratory fuelling in first-year garden warblers Sylvia borin
Auteurs :	Thord Fransson, Auteur ; Christos Barboutis, Auteur ; Roger Mellroth, Auteur ; Triantaphyllos Akriotis, Auteur
Type de document :	Article
Dans :	Journal of Avian Biology (39(2) MAR 2008)
Article en page(s) :	133-138
Langues:	Anglais
Résumé :	Large numbers of passerine migrants cross the Sahara desert every year on their way to-and-from wintering areas in tropical Africa. In the desert, hardly any fuelling opportunities exist and most migrants have to prepare in advance. A central question is how inexperienced birds know where to fuel. Inexperienced garden warblers Sylvia borin were studied in Greece just before the desert crossing in autumn. Body mass data collected at two sites indicate that most birds do not fuel for the desert crossing further north. For the first time, detailed information about stopover duration close to the Sahara desert was studied by using light weight radio-transmitters. Results from Crete show that most first-year garden warblers arrive with relatively small fuel loads in relation to lean body mass (

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