Dispersal and dispersion of southern elephant seals in the Kerguelen province, Southern Ocean

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dc.contributor.author Oosthuizen, W.C. (Wessel Christiaan)
dc.contributor.author Bester, Marthan Nieuwoudt
dc.contributor.author Tosh, Cheryl A.
dc.contributor.author Guinet, Christophe
dc.contributor.author Besson, Dominique
dc.contributor.author De Bruyn, P.J. Nico
dc.date.accessioned 2012-01-16T06:42:45Z
dc.date.available 2012-01-16T06:42:45Z
dc.date.issued 2011-07
dc.description.abstract Southern elephant seals Mirounga leonina within the Kerguelen province disperse between Marion Island (MI), Iles Crozet (IC) and Iles Kerguelen (IK) despite the high site fidelity characteristic of this species. From 1987–2002, 199 IC individuals, or 11.63% of the tagged population there, were resighted at MI. Resights of IC seals at MI peaked during the juvenile moult and seals aged 0–2 represent 66% of all resights made. Equal numbers of male and female seals (all age classes) were dispersing. Dispersing breeding females (n=22, on 33 occasions) outnumbered dispersing breeding males (n=6, on 16 occasions), after initially emigrating from IC to MI as juvenile seals (natal dispersal). Greater male-mediated gene flow was ultimately attained due to the polygynous mating system and some extremely successful males. Of 132 seals fitted with satellite-relay data loggers at MI, six hauled out at IC and three at IK. Two of the seals which migrated to IC were born at MI; all others were unmarked males likely to be native to IC or IK. Dispersal should ideally be considered when assessing vital rates for southern Indian Ocean elephant seal populations. en
dc.description.librarian ab2012 en
dc.description.sponsorship The Department of Science and Technology, through the National Research Foundation (NRF), provided financial support. WCO received financial support from a NRF Grantholder-linked bursary within the project ‘‘Conservation of Seabirds, Shorebirds and Seals’’ led by L. Underhill of the Animal Demography Unit, Department of Zoology, University of Cape Town. en
dc.description.uri http://journals.cambridge.org/action/displayJournal?jid=ans en
dc.identifier.citation Oosthuizen, WC, Bester, MN, Tosh, CA, Guinet, C, Besson, D & De Bruyn, PJN 2011, 'Dispersal and dispersion of southern elephant seals in the Kerguelen province, Southern Ocean', Antarctic Science, vol. 23, no. 6, pp. 567-577. en
dc.identifier.issn 0954-1020 (print)
dc.identifier.issn 1365-2079 (online)
dc.identifier.other 10.1017/S0954102011000447
dc.identifier.uri http://hdl.handle.net/2263/17773
dc.language.iso en en
dc.publisher Cambridge University Press en
dc.rights © Antarctic Science Ltd 2011. This article is embargoed by the publisher until July 2012. en
dc.subject Gene flow en
dc.subject Iles Crozet en
dc.subject Iles Kerguelen en
dc.subject Mark-resighting en
dc.subject Metapopulation en
dc.subject Migration en
dc.subject Mirounga leonina en
dc.subject Marion Island en
dc.subject.lcsh Southern elephant seal -- Kerguelen Islands en
dc.title Dispersal and dispersion of southern elephant seals in the Kerguelen province, Southern Ocean en
dc.type Article en


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