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The population increase of common guillemots Uria aalge on Skomer Island is explained by intrinsic demographic properties

Citation

Meade, J and Hatchwell, BJ and Blanchard, JL and Birkhead, TR, The population increase of common guillemots Uria aalge on Skomer Island is explained by intrinsic demographic properties, Journal of Avian Biology, 44, (1) pp. 55-61. ISSN 0908-8857 (2013) [Refereed Article]

Copyright Statement

Copyright 2013 The Authors.Journal of Avian Biology Copyright 2013 Nordic Society Oikos

DOI: doi:10.1111/j.1600-048X.2012.05742.x

Abstract

The population of common guillemots Uria aalge on Skomer Island, Wales has been monitored since 1963, and in the last 30 yr has increased at an almost constant rate of 5% yr−1. A previous attempt to model the population based on intrinsic demographic parameters estimated over just five years failed to explain the observed population increase, probably because the estimate of juvenile survival was too low. This raised the possibility that immigration fuelled the population increase. Here we use > 30 yr of detailed field observations to re-estimate key population parameters (productivity, adult survival and juvenile survival) in order to model the population. We show that the observed rate of increase can be explained by these intrinsic parameters, and we therefore conclude that immigration is not necessary to generate the observed population growth.

Item Details

Item Type:Refereed Article
Keywords:seabird demography
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Community Ecology
Objective Division:Environment
Objective Group:Flora, Fauna and Biodiversity
Objective Field:Coastal and Estuarine Flora, Fauna and Biodiversity
Author:Blanchard, JL (Dr Julia Blanchard)
ID Code:100478
Year Published:2013
Web of Science® Times Cited:3
Deposited By:Sustainable Marine Research Collaboration
Deposited On:2015-05-18
Last Modified:2015-08-31
Downloads:0

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