English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/36010
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

Adaptive allocation of stress-induced deformities on bird feathers

AuthorsBlas, Julio ; Jovani, Roger
Keywordsbirds; Ciconia ciconia; fault bar allocation hypothesis; feathers; flight; stress
Issue Date2004
PublisherJohn Wiley & Sons
CitationJ. EVO L. B I OL. 17 (2 004 ) 294 –3 01
AbstractPhysiological stress during ontogeny is known to cause abnormalities in keratin structures of vertebrates, but little is known about if and how organisms have evolved mechanisms to reduce the negative effects of these abnormalities. Stress experienced during avian feather growth is known to lead to the formation of fault bars, and thereby to the weakening of feathers because of shortage and slimming of barbules. Here we propose and test a new hypothesis (the ‘fault bar allocation hypothesis’) according to which birds should have evolved adaptive strategies to counteract this evolutionary pressure. In particular, we predicted and tested the idea that in flying birds, natural selection should have selected for mechanisms to reduce fault bar load on feathers with high strength requirements during flight. Data on the growth of feathers of nestling white storks (Ciconia ciconia) revealed a consistent allocation of more, and more intense, fault bars in innermost than in outermost wing feathers as predicted by our hypothesis. Moreover, the same pattern emerged from feathers of adult storks. We discuss the generality of our results, and suggest avenues for further investigations in this area.
Publisher version (URL)http://onlinelibrary.wiley.com/doi/10.1111/j.1420-9101.2003.00680.x/pdf
URIhttp://hdl.handle.net/10261/36010
DOI10.1111/j.1420-9101.2003.00680.x
Appears in Collections:(EBD) Artículos
Files in This Item:
File Description SizeFormat 
2004_jovani&blas_jeb 17 294-301.doc1,48 MBMicrosoft WordView/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.