nerc.ac.uk

Adult survival rates of Shag (Phalacrocorax aristotelis), Common Guillemot (Uria aalge), Razorbill (Alca torda), Puffin (Fratercula arctica) and Kittiwake (Rissa tridactyla) on the Isle of May 1986-96

Harris, M. P.; Wanless, S.; Rothery, P.. 2000 Adult survival rates of Shag (Phalacrocorax aristotelis), Common Guillemot (Uria aalge), Razorbill (Alca torda), Puffin (Fratercula arctica) and Kittiwake (Rissa tridactyla) on the Isle of May 1986-96. Atlantic Seabirds, 2. 133-150.

Full text not available from this repository.

Abstract/Summary

On the Isle of May between 1986 and 1996, the average adult survival of Shags Phalacrocorax aristotelis was 82.1%, Common Guillemots Uria aalge 95.2%, Razorbills Alca torda 90.5%, Puffins Fratercula arctica 91.6% and Kittiwakes Rissa tridactyla 88.2%. Shags, Razorbills and Puffins all had a single year of exceptionally low survival but these years did not coincide. In contrast, Kittiwake survival declined significantly over the period and there was evidence that substantial non-breeding occurred in several years. Breeding success of Kittiwakes also declined, which gives rise to concern for its future status. Given a high enough level of resighting, return rates (the proportion of birds known to be alive one year that were seen the next year) on a year-by-year basis provide a reasonable indication of relative changes in adult survival.

Item Type: Publication - Article
Programmes: CEH Programmes pre-2009 publications > Other
CEH Sections: _ Biodiversity & Population Processes
Additional Keywords: Shag, Phalacrocorax aristotelis, Common Guillemot, Uria aalge, Razorbill, Alca torda, Puffin, Fratercula arctica, Kittiwake, Rissa tridactyla
NORA Subject Terms: Zoology
Date made live: 08 Dec 2008 21:30
URI: http://nora.nerc.ac.uk/id/eprint/5123

Actions (login required)

View Item View Item