Newell, M.; Harris, M.P.; Wanless, S.; Burthe, S.; Bogdanova, M.; Gunn, C.M.; Daunt, F.

The Isle of May long-term study (IMLOTS) seabird annual breeding success 1982-2016

This dataset contains calculated breeding success rates for six seabird species from representative colonies on the Isle of May, off the East coast of Scotland. Annual breeding success has been measured as the number of chicks fledged per active nest for the Atlantic puffin (Fratercula arctica, since 1982), common guillemot (Uria aalge, since 1982), razorbill (Alca torda, since 1982), European shag (Phalacrocorax aristotelis, since 1987), black-legged kittiwake (Rissa tridactyla, since 1987) and northern fulmar (Fulmarus glacialis, since 1987). The number of active nests recorded are also provided. Data were collected as part of the Isle of May long-term study (IMLOTS), which aims to identify the impact of environmental change on seabirds and their associated ecosystems. This monitoring has been ongoing since 1974, by essentially the same team of scientists, using the same well-documented methods throughout this time.

Publication date: 2016-11-01

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Supporting documentation

Format of the Dataset : Comma-separated values (CSV)

Access and use conditions

This resource is made available under the terms of the Open Government Licence

You must cite: Newell, M.; Harris, M.P.; Wanless, S.; Burthe, S.; Bogdanova, M.; Gunn, C.M.; Daunt, F. (2016). The Isle of May long-term study (IMLOTS) seabird annual breeding success 1982-2016. NERC Environmental Information Data Centre.


This dataset is part of the following


Study area
Temporal extent
1982-01-01    to    2016-08-31

Supplemental information

Other useful information regarding this dataset:

Further information about the UK seabird monitoring programme, of which the Isle of May study is a part.


Data were collected by staff of the Institute for Terrestrial Ecology staff, led by Mike Harris, until 2000, when this organisation merged with several others to form the Centre for Ecology and Hydrology (CEH). The same research group has continued the work since then. For each species data were collected on numbers of active nests and numbers of successfully fledged chicks from those nests. The data provided are the success rates for each species for each year, which are calculated as number of successful chicks divided by the number of breeding pairs. The full methodology is available in the contextual metadata, which can be found attached to this record. These data are quality checked by scientific staff as part of their preparation for presentation in annual reports to the Joint Nature Conservation Committee (JNCC), as part of the UK national Seabird Monitoring Programme network. These data should be used after consultation with the appropriate CEH staff.


Newell, M.
Centre for Ecology & Hydrology
Harris, M.P.
Centre for Ecology & Hydrology
Wanless, S.
Centre for Ecology & Hydrology
Burthe, S.
Centre for Ecology & Hydrology
Bogdanova, M.
Centre for Ecology & Hydrology
Gunn, C.M.
Centre for Ecology & Hydrology
Daunt, F.
Centre for Ecology & Hydrology

Other contacts

Point Of Contact
Daunt, F.
Centre for Ecology & Hydrology
Bush Estate
EH26 0QB
United Kingdom
NERC Environmental Information Data Centre
Environmental Information Data Centre
Environmental Information Data Centre


Spatial reference system
WGS 84


Topic categories
Discipline keywords
Theme keywords
Environmental monitoring facilities

Dataset identifiers


Information maintained by
Newell, M
Centre for Ecology & Hydrology
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