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. 10.1111/j.1474-919X.1996.tb08057.x

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Abstract/Summary

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:	Article
Identification Number/DOI:	10.1111/j.1474-919X.1996.tb08057.x
Programmes:	CEH Programmes pre-2009 publications > Other
CEH Sections:	_ Pre-2000 sections
ISSN:	0019-1019
Additional Keywords:	Isle of May
NORA Subject Terms:	Zoology
Date made live:	10 Dec 2010 17:15
URI:	http://nora.nerc.ac.uk/id/eprint/12680

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