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

Notornis

Beauchamp, AJ¹  Chambers, R¹ 

关键词: census;    Gallirallus australis;    population density;    Rallidae;    Weka;   

DOI  :  

学科分类：动物科学

来源: Ornithological Society of New Zealand Inc.

【 摘 要 】

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.

【 授权许可】

Unknown