Publications Archive - Page 20 of 279

Causes of mortality for kārearea / New Zealand falcon (Falco novaeseelandiae) in the Whakatipu district

Notornis, 64 (1), 21-23

E. Waite (2017)

Article Type: Short Note

Birds New Zealand No. 10

Birds New Zealand, June (10),

(2016)

Article Type: Magazine

Birds New Zealand No. 12

Birds New Zealand, December (12),

(2016)

Article Type: Magazine

Nest site selection by sympatric orange-fronted (Cyanoramphus malherbi) and yellow-crowned parakeets (C. auriceps) in Nothofagus spp. forest: interspecific competition between two closely related species?

Notornis, 63 (1), 9-17

J.C. Kearvell; J.V. Hal (2016)

Article Type: Paper

Orange-fronted (Cyanoramphus malherbi) and yellow-crowned parakeets (C. auriceps) are sympatric congeners that are secondary cavity nesting species, with the former being critically endangered. Both currently inhabit anthropogenically-modified Nothofagus forest. We compared the characteristics of nest sites in both species and found the majority of nest site parameters (tree height, height of hole above ground, DBH, tree condition and aspect) were similar. However, orange-fronted parakeets selected nest cavities with a significantly narrower entrance, and when situated in red beech (Nothofagus fusca), nest entrances were significantly smaller in area than in yellow-crowned parakeets. As the male orange-fronted parakeet is smaller in body mass than the male yellow-crowned parakeet (only males feed nestlings when laying multiple clutches), the difference in nest hole size may simply indicate that they are capable of utilising smaller entrances. We also found that orange-fronted parakeets selected nest holes in standing dead trees more frequently and nest sites in silver beech (N. menziesii) less frequently than expected. While the lack of differences in nest site characteristics suggests some interspecific competition may be occurring between these species (i.e., they occasionally use the same nest holes), it is difficult to establish this experimentally and to determine whether these differences are artefacts of former niche separation in unmodified forest.

Index: Volume 63, 2016

Notornis, 63 (index), 197-209

T. Lovegrove (2016)

Article Type: Index

Birds New Zealand No. 11

Birds New Zealand, September (11),

(2016)

Article Type: Magazine

Birds New Zealand No. 9

Birds New Zealand, March (9),

(2016)

Article Type: Magazine

Landscape-scale trapping of stoats (Mustela erminea) benefits tokoeka (Apteryx australis) in the Murchison Mountains, Fiordland, New Zealand

Notornis, 63 (1), 1-8

J. Tansell; H.K. Edmonds; H.A. Robertson (2016)

Article Type: Paper

A 15,000 ha low-intensity stoat (Mustela erminea) trapping network was established in the Murchison Mountains in 2002, primarily to protect the last natural population of the critically endangered takahe (Porphyrio hochstetteri). We compared the productivity and survival of threatened southern brown kiwi or tokoeka (Apteryx australis) living in 3 valleys that were covered by this trapping network with those in a nearby valley that was left untreated. Chick survival to 6 months old was significantly higher in the trapped areas (37%) than in the untrapped area (19%). This doubling of chick survival was sufficient to change the rate of population growth, as derived from Leslie matrix analyses, from a projected decline of 1.6% per annum without management to a projected increase of 1.2% per annum with trapping.