Estimating regional population size and annual harvest intensity of the sooty shearwater in New Zealand

Autor:	Jamie Newman, Sam McKechnie, Darren Scott, Henrik Moller, Corey Bragg, David Fletcher
Rok vydání:	2009
Předmět:	education.field_of_study Rakiura biology Ecology Population size Titi Population biology.organism_classification Population density Population model Animal Science and Zoology Wildlife management education Sooty shearwater
Zdroj:	New Zealand Journal of Zoology. 36:307-323
ISSN:	1175-8821 0301-4223
Popis:	Recent comprehensive survey data from multiple New Zealand offshore islands were combined with demographic population models to produce the first formal estimate of the total population of sooty shearwaters within New Zealand territory. We estimated the total population over 1994–2005 to be 21.3 (19.0–23.6) million individual birds in the New Zealand region. This population consisted of 12.8 (12.0–13.6) million adults, 2.8 (2.5–3.1) million chicks, and 4.4 (4.2–4.7) million breeding pairs. Breeding sooty shearwaters were concentrated primarily around the southern islands of New Zealand, with 53% breeding in the Titi Islands surrounding Rakiura (Stewart Island). Rakiura Maori muttonbirders were estimated to harvest 360 000 (320 000–400 000) sooty shearwaters per year, equivalent to 18% of the chicks produced in the harvested areas and 13% of chicks in the New Zealand region. Overall, 11% of the chicks within the Titi Islands live on unharvested ground. Systematic and widespread surveys of breeding...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::95c1803a7eb9fc9df410b22ff5fd48c6 https://doi.org/10.1080/03014220909510157 Zobrazit plný text záznamu Plný text ve formátu PDF