Sunday, July 23, 2017

Assessing minimum population size of Kermadec parakeets (Cyanoramphus novaezelandiae cyanurus) on Macauley Island, Kermadec Islands

TitleAssessing minimum population size of Kermadec parakeets (Cyanoramphus novaezelandiae cyanurus) on Macauley Island, Kermadec Islands
Publication TypeJournal Article
Year of Publication2014
AuthorsGreene, TC
JournalNotornis
Volume61
Issue3
Pagination154-161
Type of ArticleFull Article
Abstract

The minimum population size of Kermadec parakeets (Cyanoramphus novaezelandiae cyanurus) is reported for Macauley Island in the southern Kermadec Islands group. To minimise population impacts of any accidental parakeet deaths the confirmed presence of a minimum population of 3,000 parakeets was required prior to the attempted eradication of Pacific rats (Rattus exulans) from Macauley Island. Eight pre-defined vegetation strata were identified and 4 count methods ranging from simple counts to distance sampling were assigned to each strata depending on sampling conditions. As the resultant point estimate of 3,484 parakeets during the 29 June to 1 July 2006 survey period was greater than the minimum threshold the rat eradication was able to proceed. The potential impacts of changes in the vegetation on the population dynamics of Kermadec parakeets and recommendations for future monitoring of this species on Macauley Island are discussed.

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