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The Isle of May long-term study (IMLOTS) seabird annual return rate 1988-2016

Published by:
Environmental Information Data Centre
Last updated:
21 January 2026
Topic:
Not added
Licence:
None

Summary

[THIS DATASET HAS BEEN WITHDRAWN]. This dataset contains calculated return rates for five seabird species from representative colonies on the Isle of May, off the East coast of Scotland. Annual return rates are measured as the number of individually colour marked individuals seen in any one year that were also observed in the previous year for the Atlantic puffin (Fratercula arctica), common guillemot (Uria aalge), razorbill (Alca torda), European shag (Phalacrocorax aristotelis) and black-legged kittiwake (Rissa tridactyla). Not every individual is seen in any one year and the data set does not take into account those missed in any previous years hence these data are not to be treated as survival estimates. The Isle of May long-term study (IMLOTS) aims to identify the impact of environmental change on seabirds and their associated ecosystems. Understanding the mechanisms underlying variation in seabird population size requires a thorough knowledge of demographic parameters, namely birth rates, death rates, immigration and emigration. The effects of environmental change are likely to be different according to which demographic parameter or life history stage is being considered. This complexity means that only long-term monitoring, such as that carried out on the Isle of May, will allow us to understand the functioning of bird populations and their responses to environmental change. Full details about this dataset can be found at https://doi.org/10.5285/53251b3c-6c79-4aeb-a0de-fc63b9350cc1

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Supporting information ZIP 21 January 2026 Not available

Additional information

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Added to data.gov.uk
2026-01-09
Access contraints
Superseded
Harvest GUID
53251b3c-6c79-4aeb-a0de-fc63b9350cc1
Extent
Latitude: 56.194° to °
Longitude: -2.569° to -2.544°
Spatial reference system
Dataset reference date
2016-11-01 (publication)
1988-08-01 (creation)
Frequency of update
asNeeded
Responsible party
(author, pointOfContact, publisher, owner); NERC EDS Environmental Information Data Centre (custodian)
ISO 19139 resource type
dataset
Metadata language
eng
Source Metadata
XML
HTML

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