1624fe45-0deb-4bcd-9f13-75578693aaae English ISO/IEC 8859-1 (also known as Latin 1) dataset dataset NERC EDS Environmental Information Data Centre Lancaster Environment Centre, Library Avenue, Bailrigg Lancaster LA1 4AP UK info@eidc.ac.uk https://eidc.ac.uk/ EIDC website The Environmental Information Data Centre (EIDC) is the UK's national data centre for terrestrial and freshwater sciences. information pointOfContact 2025-11-13T16:17:53 UK GEMINI 2.3 OSGB 1936 / British National Grid The Isle of May long-term study (IMLOTS) seabird annual return rate 1988-2021 2022-09-21 publication https://catalogue.ceh.ac.uk/id/1624fe45-0deb-4bcd-9f13-75578693aaae 10.5285/1624fe45-0deb-4bcd-9f13-75578693aaae doi: Newell, M.A., Harris, M.P., Wanless, S., Burthe, S., Bogdanova, M., Gunn, C.M., Daunt, F. (2022). The Isle of May long-term study (IMLOTS) seabird annual return rate 1988-2021. NERC EDS Environmental Information Data Centre 10.5285/1624fe45-0deb-4bcd-9f13-75578693aaae 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. In the dataset, each year is represented by a single row of data, there are five columns showing the calculated return rates for each species (indicated by its common name and suffixed 'RR'). The figure quoted in any row is the proportion of marked birds which are observed by the end of the stated breeding season. Each row also contains the number of individuals seen in that year and the number seen in the previous year, taking into account new individuals which are marked. Full details about this dataset can be found at https://doi.org/10.5285/1624fe45-0deb-4bcd-9f13-75578693aaae Newell, M.A. UK Centre for Ecology & Hydrology enquiries@ceh.ac.uk https://orcid.org/0000-0002-4723-175X ORCID record ORCID is an open, non-profit, community-driven effort to create and maintain a registry of unique researcher identifiers and a transparent method of linking research activities and outputs to these identifiers. information author Harris, M.P. UK Centre for Ecology & Hydrology enquiries@ceh.ac.uk https://orcid.org/0000-0002-1342-430X ORCID record ORCID is an open, non-profit, community-driven effort to create and maintain a registry of unique researcher identifiers and a transparent method of linking research activities and outputs to these identifiers. information author Wanless, S. UK Centre for Ecology & Hydrology enquiries@ceh.ac.uk https://orcid.org/0000-0002-2788-4606 ORCID record ORCID is an open, non-profit, community-driven effort to create and maintain a registry of unique researcher identifiers and a transparent method of linking research activities and outputs to these identifiers. information author Burthe, S. UK Centre for Ecology & Hydrology enquiries@ceh.ac.uk https://orcid.org/0000-0001-8871-3432 ORCID record ORCID is an open, non-profit, community-driven effort to create and maintain a registry of unique researcher identifiers and a transparent method of linking research activities and outputs to these identifiers. information author Bogdanova, M. UK Centre for Ecology & Hydrology enquiries@ceh.ac.uk author Gunn, C.M. UK Centre for Ecology & Hydrology enquiries@ceh.ac.uk author Daunt, F. UK Centre for Ecology & Hydrology enquiries@ceh.ac.uk https://orcid.org/0000-0003-4638-3388 ORCID record ORCID is an open, non-profit, community-driven effort to create and maintain a registry of unique researcher identifiers and a transparent method of linking research activities and outputs to these identifiers. information author Newell, M. UK Centre for Ecology & Hydrology enquiries@ceh.ac.uk pointOfContact NERC EDS Environmental Information Data Centre info@eidc.ac.uk custodian NERC EDS Environmental Information Data Centre info@eidc.ac.uk publisher UK Centre for Ecology & Hydrology enquiries@ceh.ac.uk owner Environmental Monitoring Facilities theme GEMET - INSPIRE themes, version 1.0 2008-06-01 publication Uria aalge Fratercula arctica Alca torda Rissa tridactyla Phalacrocorax aristotelis Wikidata 2012-10-29 creation Isle of May GeoNames 2006-01-01 creation UK-SCAPE Return rate Atlantic Puffin Black-legged kittiwake Common guillemot European shag Razorbill Long-term data otherRestrictions no limitations otherRestrictions This resource is available under the terms of the Open Government Licence otherRestrictions If you reuse this data, you should cite: Newell, M.A., Harris, M.P., Wanless, S., Burthe, S., Bogdanova, M., Gunn, C.M., Daunt, F. (2022). The Isle of May long-term study (IMLOTS) seabird annual return rate 1988-2021. NERC EDS Environmental Information Data Centre https://doi.org/10.5285/1624fe45-0deb-4bcd-9f13-75578693aaae textTable English utf8 environment 1988-01-01 2021-12-31 -2.597 -2.517 56.168 56.206 Comma-separated values (CSV) NERC EDS Environmental Information Data Centre info@eidc.ac.uk distributor https://data-package.ceh.ac.uk/data/1624fe45-0deb-4bcd-9f13-75578693aaae Download the data Download a copy of this data download https://data-package.ceh.ac.uk/sd/1624fe45-0deb-4bcd-9f13-75578693aaae.zip Supporting information Supporting information available to assist in re-use of this dataset information dataset dataset Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 Standardised monitoring of seabirds commenced in 1987 at which point a proportion of the population of the five study species were individually colour marked. As a result the first year of data examining return rate was in 1988 when these individuals returned to breed. The number of plots of individually colour marked birds varies between species and new individuals are marked every year in order to ensure the marked population is maintained at an adequate level for analysis.