The need for year-specific correction factors (k values) when converting counts of individual common guillemots Uria aalge to breeding pairs

Long-term studies at two Scottish colonies show that the k value used to convert counts of individual Common Guillemots Uria aalge to pairs has changed substantially in the last 15 years due to decreases in survival and colony attendance. Any future wide-scale census of this species needs to collect...

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Bibliographic Details
Published in:Bird Study
Main Authors: Harris, Mike P., Heubeck, Martin, Newell, Mark A., Wanless, Sarah
Format: Article in Journal/Newspaper
Language:English
Published: Taylor & Francis 2015
Subjects:
Ecology and Environment
Uria aalge
uria
Online Access:http://nora.nerc.ac.uk/id/eprint/510579/
https://nora.nerc.ac.uk/id/eprint/510579/1/N510579PP.pdf
http://www.tandfonline.com/doi/abs/10.1080/00063657.2015.1017444
Description
Summary:Long-term studies at two Scottish colonies show that the k value used to convert counts of individual Common Guillemots Uria aalge to pairs has changed substantially in the last 15 years due to decreases in survival and colony attendance. Any future wide-scale census of this species needs to collect concurrent k values if counts of individual birds are to be used to determine changes in breeding populations since the previous survey.

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