English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/60441
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

Foraging ecology of Mediterranean fin whales in a changing environment elucidated by satellite tracking and baleen plate stable isotopes

AuthorsBentaleb, Ilhem; Martín, C. ; Vrac, M.; Mate, B.; Mayzaud, P.; Siret, D.; de Stephanis, Renaud ; Guinet, Christophe
Issue Date2011
PublisherInter Research
CitationMarine Ecology - Progress Series 438: 285- 302 (2011)
AbstractWe investigated seasonal shifts in diet and distribution of fin whales Balaenoptera physalus occurring in the western Mediterranean Sea. For this purpose, we combined carbon and nitrogen stable isotope ratios (δ13C, δ15N) along 10 baleen plates collected from stranded fin whales between 1975 and 2002 with satellite tag deployments on 11 fin whales during summer 2003. Baleen plate stable isotopes were compared with those of the krill Meganyctiphanes norvegica, the main prey of fin whales in the northwestern Mediterranean Sea. Two plates col- lected near Malaga, Spain, exhibited larger δ13C variations, while only smaller variations could be detected in the other 8. While all mean baleen plate results were consistent with the δ13C signa- ture of Mediterranean M. norvegica, the most depleted δ13C values were intermediate between those of Atlantic and Mediterranean M. norvegica, suggesting westward migrations perhaps extending to the Strait of Gibraltar but not extensive, prolonged feeding in the Northeast Atlantic. This pattern was confirmed by satellite tracking; 1 out of 8 fin whales we successfully tracked left the Mediterranean for the Atlantic. Longer-term changes in isotopic signatures of baleen plates exhibited significant depletion trends, indicating that changes due to increasing input of nutrients and anthropogenic carbon are occurring in the western Mediterranean Sea ecosystem.
URIhttp://hdl.handle.net/10261/60441
DOI10.3354/meps09269
Identifiersdoi: 10.3354/meps09269
issn: 0171-8630
Appears in Collections:(EBD) Artículos
Files in This Item:
File Description SizeFormat 
m438p285.pdf968,74 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.