English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/143776
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Title

Extremely detoured migration in an inexperienced bird: interplay of transport costs and social interactions

AuthorsMellone, Ugo; Limiñana, Rubén ; Urios, Vicente
Issue Date2011
PublisherJohn Wiley & Sons
CitationJournal of Avian Biology 42(5): 468-472 (2011)
AbstractWe tagged two juvenile short-toed eagles in southern Italian peninsula with GPS satellite transmitters. According to previous visual observations, two different migratory routes for Italian short-toed eagles to reach Africa in autumn have been proposed: via Sicily and via Gibraltar. These routes include different over-water distances to cross the Mediterranean Sea, and thus different proportions of flight modes (soaring-gliding vs flapping-gliding) with resulting different transport costs. Considering different scenarios of energy cost of transport, with flapping-gliding flight over water being more costly than flying over land using soaring-gliding flight, we predicted a maximum optimal detour of 1218 km. Both individuals reached Africa using the longest, detoured, route, avoiding the longest water crossing. To achieve this they began migrating northwards, keeping for ca 700 km a direction opposite to that followed by any other migrating bird from the Northern hemisphere in autumn. The comparison of optimal detour predictions with observed migratory tracks suggests that this migratory strategy prioritizes not only energy minimization, but also safety, given the mortality risk associated with the sea crossing. Finally, it is unlike that these inexperienced individuals followed such a complex route relying only on endogenous information and we therefore suggest, also on the basis of field observations, that social interactions (adult guidance) allow these individuals to learn the detoured route.
URIhttp://hdl.handle.net/10261/143776
DOI10.1111/j.1600-048X.2011.05454.x
Identifiersdoi: 10.1111/j.1600-048X.2011.05454.x
issn: 0908-8857
e-issn: 1600-048X
Appears in Collections:(IREC) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.