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


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Scott, D, Scofield, P, 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

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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
Authors/Creators:Scott, D and Scofield, P and Hunter, C and Fletcher, D
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
Collections: Royal Society Collection > Papers & Proceedings of the Royal Society of Tasmania
Additional Information:

Copyright Royal Society of Tasmania

Date Deposited: 17 May 2012 02:33
Last Modified: 15 Sep 2017 01:06
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