Reference : Toothed whales in the northwestern Mediterranean: Insight into their feeding ecology usi...
Scientific journals : Article
Life sciences : Aquatic sciences & oceanology
Life sciences : Environmental sciences & ecology
http://hdl.handle.net/2268/87934
Toothed whales in the northwestern Mediterranean: Insight into their feeding ecology using chemical tracers
English
Praca, Emilie [> > > >]
Laran, Sophie [> > > >]
Lepoint, Gilles mailto [Université de Liège - ULg > Département des sciences et gestion de l'environnement > Océanologie]
Thomé, Jean-Pierre mailto [Université de Liège - ULg > Département des sciences et gestion de l'environnement > Ecologie animale et écotoxicologie]
Quetglas, Antoni [> > > >]
Belcari, Paola [> > > >]
Sartor, Paolo [> > > >]
Dhermain, Frank [> > > >]
Ody, Denis [> > > >]
Tapie, Nathalie [> > > >]
Budzinski, Hélène [> > > >]
Das, Krishna mailto [ > > ]
2011
Marine Pollution Bulletin
62
5
1058-1065
Yes (verified by ORBi)
International
0025-326X
[en] Chemical tracers ; Stable isotopes ; Organochlorines ; Sperm whale ; Pilot whale ; Risso's dolphin ; Mediterranean Sea ; marine mammals ; pollutants ; pollution
[en] Risso’s dolphins, pilot whales and sperm whales rarely strand in the northwestern Mediterranean. Thus, their feeding ecology, through the analysis of stomach contents, is poorly known. The aim of this study was to gain further insight into the segregation/superposition of the diet and habitat of Risso’s dolphins, pilot whales and sperm whales using chemical tracers, namely, stable isotopes (d13C, d15N) and orga- nochlorines. Significantly different d15N values were obtained in Risso’s dolphins (11.7 ± 0.7‰), sperm whales (10.8 ± 0.3‰) and pilot whales (9.8 ± 0.3‰), revealing different trophic levels. These differences are presumably due to various proportions of Histioteuthidae cephalopods in each toothed whale’s diet. Similar d13C contents between species indicated long-term habitat superposition or corroborated impor- tant seasonal migrations. Lower congener 180 concentrations (8.20 vs. 21.73 lg.g􏰀1 lw) and higher tDDT/ tPCB ratios (0.93 vs. 0.42) were observed in sperm whales compared with Risso’s dolphins and may indi- cate wider migrations for the former. Therefore, competition between these species seems to depend on different trophic levels and migration patterns.
http://hdl.handle.net/2268/87934
10.1016/j.marpolbul.2011.02.024

File(s) associated to this reference

Fulltext file(s):

FileCommentaryVersionSizeAccess
Restricted access
2011 MPB Praca.pdfPublisher postprint349.41 kBRequest copy

Bookmark and Share SFX Query

All documents in ORBi are protected by a user license.