Prey preferences among the community of deep-diving odontocetes from the Bay of Biscay, Northeast Atlantic

International audience Long-finnedpilotwhales(Globicephalamelas),Risso'sdolphins(Grampusgriseus), melon-headedwhales (Peponocephalaelectra),Cuvier'sbeakedwhales(Ziphiuscavirostris), Sowerby'sbeakedwhales(Mesoplodon bidens), northernbottlenosewhales(Hyperoodonampullatus), spermwhales(P...

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Bibliographic Details
Published in:Deep Sea Research Part I: Oceanographic Research Papers
Main Authors: Spitz, Jérôme, Cherel, Yves, Bertin, Stéphane, Kiszka, Jeremy, Dewez, Alexandre, Ridoux, Vincent
Other Authors: LIttoral ENvironnement et Sociétés (LIENSs), La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS), Centre d'Études Biologiques de Chizé (CEBC), Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS)
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 2011
Subjects:
[SDE]Environmental Sciences
Mesoplodon bidens
Northeast Atlantic
Online Access:https://hal.science/hal-00573185
https://doi.org/10.1016/j.dsr.2010.12.009
Description
Summary:International audience Long-finnedpilotwhales(Globicephalamelas),Risso'sdolphins(Grampusgriseus), melon-headedwhales (Peponocephalaelectra),Cuvier'sbeakedwhales(Ziphiuscavirostris), Sowerby'sbeakedwhales(Mesoplodon bidens), northernbottlenosewhales(Hyperoodonampullatus), spermwhales(Physetermacrocephalus), dwarf spermwhales(Kogiasima) andpygmyspermwhales(Kogiabreviceps) makeupthelarge communityofdeep-divingodontocetesoccurringofftheBayofBiscay,northeastAtlantic.Theecology of thesetoothedcetaceansispoorlydocumentedworldwide.Thepresentstudydescribedtheirprey preferencesfromstomachcontentanalysisandshowedresourcepartitioningwithintheassemblage. The majorityofthespeciesappearedtobemostlyteutophageous.Fishwasanimportantfoodsource only fortheSowerby'sbeakedwhaleand,toalesserextent,forthelong-finnedpilotwhale.Intermsof foraginghabitatsinferredfrompreycomposition,eitherpelagicoceanicordemersalneritichabitats were exploitedbytoothedwhalesintheBayofBiscay,withonlythelong-finnedpilotwhaleforagingin the twohabitats.Finally,withmorethan14,000identifiedcephalopodsfrom39species,thepresent studyhighlightedalsothepoorlyknowndeep-seacephalopodcommunityofftheBayofBiscayusing top predatorsasbiologicalsamplers.

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