Sunday, July 23, 2017

Population and breeding census of New Zealand king shag (Leucocarbo carunculatus) in 2015

TitlePopulation and breeding census of New Zealand king shag (Leucocarbo carunculatus) in 2015
Publication TypeJournal Article
Year of Publication2015
AuthorsSchuckard, R, Melville, DS, Taylor, G
JournalNotornis
Volume62
Issue4
Pagination209-218
Type of ArticleFull article
Keywordsaerial survey, Marlborough Sounds, New Zealand King Shag, population
Abstract

Prior to 1992 the total population of New Zealand king shag (Leucocarbo carunculatus) was estimated to be about 300 individuals. Between 1992 and 2002, colonies in the outer Marlborough Sounds, New Zealand were surveyed by boat and the total population was estimated to be 645 birds. About 92% of all birds occurred at Duffers Reef, North Trio Island, Sentinel Rock, and White Rocks, with an estimated 102-126 breeding pairs. A survey in February 2015 was the first to be conducted from the air. All colonies were photographed within 44 minutes prior to the morning departure and the total population was estimated to be 839 individuals. A total of 187 pairs/nests were recorded using aerial 3D images of all breeding colonies in June 2015. North Trio Island was the largest breeding colony with 33.7% of all nests, followed by Duff ers Reef with 18.7% of all nests. Despite the larger revised population size, the species remains Nationally Endangered.

AttachmentSize
PDF icon Full article1.52 MB