Reference : Isotopic niches of Fin Whales from the Mediterranean Sea and the Celtic sea (North At...
Scientific journals : Article
Life sciences : Aquatic sciences & oceanology
Life sciences : Environmental sciences & ecology
http://hdl.handle.net/2268/208463
Isotopic niches of Fin Whales from the Mediterranean Sea and the Celtic sea (North Atlantic)
English
Das, Krishna mailto [Université de Liège > Département de Biologie, Ecologie et Evolution > Océanographie biologique >]
Holleville, Ophélie [> >]
Ryan, Conor [> >]
Berrow, Simon [> >]
Gilles, Anita [> >]
Ody, Denis [> >]
Michel, Loïc mailto [Université de Liège > Département de Biologie, Ecologie et Evolution > Océanographie biologique >]
2017
Marine Environmental Research
Elsevier
127
75-83
Yes (verified by ORBi)
International
0141-1136
Kidlington
United Kingdom
[en] marine mammals ; stable isotopes ; SIBER ; baleen whales ; Balaenoptera physalus ; conservation
[en] The fin whale (Balaenoptera physalus) is the most abundant and widespread mysticete species in the Mediterranean
Sea, found mostly over deep, offshore waters of the western and central portion of the region. In the Mediterranean,
this species is known to feed mainly on krill, in contrast to its Atlantic counterpart, which displays a more diversified
diet. The International Whaling Commission recognizes several managements units in the Atlantic and the
Mediterranean Sea and the connectivity between these populations is still being debated. Questions remain about
inter-individual feeding strategies and trophic ecology. The goal of this study was to compare isotopic niches of fin
whales from the Mediterranean Sea and the Celtic Sea (North Atlantic). δ13C and δ15N values were analysed in 136
skin biopsies from free-ranging Mediterranean fin whales sampled in 2010 and 2011 during campaigns at sea. δ13C
and δ15N values ranged from -20.4 to -17.1 ‰ and from 5.9 to 8.9 ‰, respectively. These values are in good
agreement with those estimated previously from baleen plates from Mediterranean and North Atlantic fin whales. The
narrow isotopic niche width of the Mediterranean fin whale (Standard Ellipses area SEAc) compared to the North
Atlantic fin whale raises many concerns in the context of global changes and long-term consequences. One could
indeed expect that species displaying narrow niches would be more susceptible to ecosystem fragmentation and other
anthropogenic impacts.
Centre Interfacultaire de Recherches en Océanologie - MARE
WWF-France ; Agence de l'eau Rhône Méditerranée Corse (France)
http://hdl.handle.net/2268/208463
10.1016/j.marenvres.2017.03.009

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