Site use and fidelity in the common guillemot Uria aalge.

Harris, M.P.; Wanless, S.; Barton, T.R.. 1996 Site use and fidelity in the common guillemot Uria aalge. Ibis, 138 (3). 399-404.

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The site fidelity of 470 colour-ringed Common Guillemots Uria aalge with at least 1 year of breeding experience was followed on the Isle of May from 1982 to 1993. On average, 85.7% of birds recorded breeding at a site in any year were present at the same site in the following season. Of those which did not retain their site, 35% had moved to another site, 25% were nonbreeders and 40% were not seen. Site- fidelity of birds which returned to the colony the next year was 91%. There were no significant age or sex effects, but there were significant (and unexplained) year and area effects. Most birds which changed sites moved less than 2 m. Some birds which obtained a new site improved their nesting success, but many others became nonbreeders; it is speculated that the former chose to move site, whilst the latter had been evicted.

Item Type: Publication - Article
Digital Object Identifier (DOI):
Programmes: CEH Programmes pre-2009 publications > Other
UKCEH and CEH Sections/Science Areas: _ Pre-2000 sections
ISSN: 0019-1019
Additional Keywords: Isle of May
NORA Subject Terms: Zoology
Date made live: 10 Dec 2010 17:15 +0 (UTC)

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