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Population density changes of adult North Island weka ( Gallirallus australis greyi ) in the Mansion House Historic Reserve, Kawau Island, in 1992-1999

TitlePopulation density changes of adult North Island weka ( Gallirallus australis greyi ) in the Mansion House Historic Reserve, Kawau Island, in 1992-1999
Publication TypeJournal Article
Year of Publication2000
AuthorsBeauchamp, AJ, Chambers, R
JournalNotornis
Volume47
Issue2
Pagination82-89
Type of Articlepaper
Keywordscensus, Gallirallus australis, population density, Rallidae, Weka
Abstract

The total population of North Island weka (Gallirallus australis greyi) is about 4150 adults spread over five islands, one North Island population, and a number of captive birds in aviaries and mainland island programmes. Between 77% and 84% of the adult weka population are on Kawau Island. Density changes in the Mansion House Historic Reserve, and anecdotal records suggest that adult weka populations on Kawau Island has fluctuated between c.2100 and c.5000 during 1992-1999. The largest declines occurred within 12 months of the 1990-91 and 1997-98 droughts.

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