Library Open Repository

Decline of Sooty Shearwaters, Puffin us griseus, on The Snares, New Zealand

Downloads

Downloads per month over past year

Scott, D and Scofield, P and Hunter, C and Fletcher, D (2008) Decline of Sooty Shearwaters, Puffin us griseus, on The Snares, New Zealand. Papers and Proceedings of the Royal Society of Tasmania, 142 (1). pp. 185-196. ISSN 0080-4703

[img]
Preview
PDF
2008_Scott_decline_of_sooty.pdf | Download (419kB)
Available under University of Tasmania Standard License.

Abstract

The number of Sooty Shearwater, Puffinus griseus, burrow entrances on North East Island of The Snares, New Zealand, declined from 3288000 (95% CI = 3.1-3.5 million) entrances between 1969 and 1971, to 2 061000 (95% CI = 1.9-2.2 million) between 1996 and 2001. This represents a decline of 37% over 27 years, or 1.72% per year (95% CI = 1.35%-2.12%). It is not known whether burrow oc· cupancy has also declined. Possible reasons for decline include fisheries bycatch, climate change, and losses on other islands to predation by introduced mammals and harvest of chicks (muttonbirding). Reliable population estimates of other Sooty Shearwater populations will be important for establishing baseline estimates against which future population trends can be evaluated. If the decline in burrow numbers represents a similar decline in Sooty Shearwater numbers on The Snares and elsewhere, the decline reported here is substantial and enough to warrant listing of the Sooty Shearwater as a "vulnerable" species, according to criterion A3 designated by the International Union for Conservaion of Nature and Natural Resources (IUCN) in 2001.

Item Type: Article
Keywords: Royal Society of Tasmania, RST, Van Diemens Land, natural history, science, ecology, taxonomy, botany, zoology, geology, geography, papers & proceedings, Australia, UTAS Library
Journal or Publication Title: Papers and Proceedings of the Royal Society of Tasmania
Page Range: pp. 185-196
ISSN: 0080-4703
Additional Information: Copyright Royal Society of Tasmania
Date Deposited: 17 May 2012 02:33
Last Modified: 18 Nov 2014 04:31
URI: http://eprints.utas.edu.au/id/eprint/13290
Item Statistics: View statistics for this item

Repository Staff Only (login required)

Item Control Page Item Control Page