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Incidental pinnipeds at high latitudes of the Vestfold Hills, Prydz Bay, East Antarctica

Published online by Cambridge University Press:  30 January 2024

John van den Hoff Open the ORCID record for John van den Hoff [Opens in a new window]
John van den Hoff*
Affiliation:
Australian Antarctic Division, 203 Channel Highway, Kingston, 7050, Tasmania, Australia
*
john_van@aad.gov.au
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Abstract

Species distributions are predicted to change with future climate-associated ecosystem changes such that so-called ‘vagrant’ individuals may become established or re-establish in areas currently thought to be beyond their principle ranges. Survey data were collated for occurrences of pinniped (seal) species at very high latitudes of the Vestfold Hills, East Antarctica. Aside from Weddell seals (Leptonychotes weddellii) and southern elephant seals (Mirounga leonina), which aggregate annually at the Vestfold Hills to breed and/or moult, three other pinniped species were observed with the recession of the fast-ice edge. Leopard seal (Hydrurga leptonyx) occurrences increased with an increase in a seasonally abundant prey resource, and crabeater seals (Lobodon carcinophaga) were seen at a time that coincides with their moult period. Occurrences of sub-adult male Antarctic fur seals (Arctocephalus gazella) increase the known southward range for this species and may reflect population increases at source populations in the Kerguelen Plateau area. Although there were no direct sightings of Ross seals (Ommatophoca rossii), their presence close to the Vestfold Hills was detected by underwater passive acoustic monitoring. Sightings of obligate drift-ice species and sub-Antarctic fur seals may change at the Vestfold Hills with climate-mediated changes in sea-ice conditions.

Keywords

Marine mammalsealvagrant
Type
Biological Sciences
Information
Antarctic Science , First View , pp. 1 - 6
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Copyright
Copyright © The Author(s), 2024. Published by Cambridge University Press on behalf of Antarctic Science Ltd

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