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Incomplete search effort: a potential source of bias in estimates of Adélie penguin breeding populations in the Australian Antarctic Territory

Published online by Cambridge University Press:  01 October 2009

Colin Southwell ,
David Smith  and
Angela Bender
Colin Southwell
Affiliation:
Department of the Environment, Water, Heritage and the Arts, Australian Antarctic Division, Channel Highway, Kingston, Tasmania 7050, Australia (contact [email protected])
David Smith
Affiliation:
Department of the Environment, Water, Heritage and the Arts, Australian Antarctic Division, Channel Highway, Kingston, Tasmania 7050, Australia (contact [email protected])
Angela Bender
Affiliation:
Department of the Environment, Water, Heritage and the Arts, Australian Antarctic Division, Channel Highway, Kingston, Tasmania 7050, Australia (contact [email protected])
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Abstract

Potential Adélie penguin Pygoscelis adeliae breeding habitat in the Australian Antarctic Territory (AAT: 45°E–136°E, 142°E–160°E) was mapped using a geographic information system (GIS), and the literature reviewed for evidence of the mapped habitat being searched for presence or absence of breeding Adélie penguins. It is concluded that incomplete search effort is a possible source of substantial negative bias of Adélie penguin breeding abundance derived from published count data in some regions of the AAT. The extent of search effort in other regions of Antarctica could be determined using the same approach applied here, because GIS data required for mapping potential habitat are available for the entire continent. We would expect that regions with more scientific and tourist activity, such as the Antarctic Peninsula, are likely to have greater search effort than the AAT.

Type
Research Article
Information
Polar Record , Volume 45 , Issue 4 , October 2009 , pp. 375 - 380
Copyright
Copyright © Cambridge University Press 2009

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