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Type: Journal article
Title: Fur seals at Macquarie Island: post-sealing colonisation, trends in abundance and hybridisation of three species
Author: Goldsworthy, S.
McKenzie, J.
Page, B.
Lancaster, M.
Shaughnessy, P.
Wynen, L.
Robinson, S.
Peters, K.
Baylis, A.
McIntosh, R.
Citation: Polar Biology, 2009; 32(10):1473-1486
Publisher: Springer-Verlag
Issue Date: 2009
ISSN: 0722-4060
Statement of
Simon David Goldsworthy, Jane McKenzie, Brad Page, Melanie L. Lancaster, Peter D. Shaughnessy, Louise P. Wynen, Susan A. Robinson, Kristian J. Peters, Alastair M. M. Baylis and Rebecca R. McIntosh
Abstract: Commercial sealers exterminated the original fur seal population at Macquarie Island in the early 1800s. The first breeding record since the sealing era was not reported until March 1955. Three species of fur seal now occur at Macquarie Island, the Antarctic (Arctocephalus gazella), subantarctic (A. tropicalis) and New Zealand (A. forsteri) fur seal. Census data from 54 breeding seasons in the period 1954–2007 were used to estimate population status and growth for each species. Between the 1950s and 1970s, annual increases in pup production for the species aggregate were low. Between 1986 and 2007, pup production of Antarctic fur seals increased by about 8.8% per year and subantarctic fur seals by 6.8% per year. The New Zealand fur seal, although the most numerous fur seal species on Macquarie Island, has yet to establish a breeding population, due to the absence of reproductively mature females. Hybridisation among species is significant, but appears to be declining. The slow establishment and growth of fur seal populations on Macquarie Island appears to have been affected by its distance from major population centres and hence low immigration rates, asynchronous colonisation times of males and females of each species, and extensive hybridisation.
Keywords: Fur seals
Arctocephalus spp
Macquarie Island
Population recovery
Description: © Springer-Verlag 2009
DOI: 10.1007/s00300-009-0645-y
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Appears in Collections:Aurora harvest 5
Earth and Environmental Sciences publications
Environment Institute publications

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