No difference in chick-provisioning by bridled and non-bridled Common Guillemots Uria aalge

Abstract Despite recent evidence that bridled Common Guillemots Uria aalge may depend more on cold-water prey species than non-bridled, there was no morph-specific difference in the species composition or size of fish caught for chicks by adults in a North Norwegian colony. This supports the recent...

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Bibliographic Details
Main Author: Robert T Barrett
Other Authors: The Pennsylvania State University CiteSeerX Archives
Format: Text
Language:English
Published: 2013
Subjects:
Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1044.8631
http://seabirdgroup.org.uk/journals/seabird-26/seabird-26-1.pdf
Description
Summary:Abstract Despite recent evidence that bridled Common Guillemots Uria aalge may depend more on cold-water prey species than non-bridled, there was no morph-specific difference in the species composition or size of fish caught for chicks by adults in a North Norwegian colony. This supports the recent suggestion that selection pressure on the morphs acts in the non-breeding season, rather than in summer.