883c6b40-024e-41e8-9c3e-2668a44b5751 eng utf8 dataset dataset NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom polardatacentre@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact 2021-08-04 ISO 19115 Geographic Information - Metadata ISO 19115:2003(E) European Petroleum Survey Group (EPSG) Geodetic Parameter Registry 2008-11-12 publication European Petroleum Survey Group EPSGadministrator@iogp.org https://www.epsg-registry.org/ EPSG Geodetic Parameter Dataset The EPSG Geodetic Parameter Dataset is a structured dataset of Coordinate Reference Systems and Coordinate Transformations, accessible through this online registry. information publisher urn:ogc:def:crs:EPSG::3031 6.18.3 Population size and breeding success of gentoo penguins on Signy Island from 1978 to 2020. 2021-08-04 creation 2021-08-04 revision 2021-08-04 publication 2021-08-04 released 1.0 https://doi.org/10.5285/883c6b40-024e-41e8-9c3e-2668a44b5751 doi GB/NERC/BAS/PDC/01540 https://data.bas.ac.uk/ Please cite this item as: Dunn, M., Adlard, S., Lynnes, A., Briggs, D., Fox, D., & Morley, T. (2021). Population size and breeding success of gentoo penguins on Signy Island from 1978 to 2020. (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/883c6b40-024e-41e8-9c3e-2668a44b5751 This dataset pertains to gentoo penguin breeding success at selected colonies on Signy island from 1978 to 2020. It comprises annual ground counts of occupied and incubating nests, eggs (proxy for breeding pairs), chicks hatched, and chicks expected to fledge. The GPS locations for surveyed sites are also included. From the 1996-1997 season onwards, this dataset conforms to CCAMLR data collection standards and contributes to the CCAMLR Ecosystem Monitoring Program (CEMP). Ecosystems component of BAS Polar Science for Planet Earth Programme, funded by NERC. No credit. completed Dunn, Michael British Antarctic Survey Researcher author Adlard, Stacey British Antarctic Survey Researcher author Lynnes, Amanda International Association of Antarctic Tour Operators Researcher author Briggs, Dirk British Antarctic Survey Researcher author Fox, Derren Royal Society for the Protection of Birds Researcher author Morley, Tim University of Aberdeen Researcher author NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information pointOfContact asNeeded completed EARTH SCIENCE > Biosphere > Ecological Dynamics > Population Dynamics EARTH SCIENCE > Biosphere > Ecological Dynamics > Post-breeding EARTH SCIENCE > Biosphere > Ecological Dynamics > Survival theme Global Change Master Directory (GCMD) Science Keywords 2026-01-27 publication 23 Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA) Greenbelt MD United States of America https://earthdata.nasa.gov/about/gcmd/global-change-master-directory-gcmd-keywords Global Change Master Directory (GCMD) Keywords The information provided on this page seeks to define how the GCMD Keywords are structured, used and accessed. It also provides information on how users can participate in the further development of the keywords. information publisher Breeding success Gentoo penguin Population size Signy Island theme Signy Island South Orkney Islands place Habitats and biotopes theme GEMET - INSPIRE themes, version 1.0 2021-01-06 revision otherRestrictions no limitations to public access otherRestrictions no limitations license Open Government Licence v3.0 otherRestrictions This data is governed by the NERC Data Policy: https://www.ukri.org/who-we-are/nerc/our-policies-and-standards/nerc-data-policy/ otherRestrictions This data is governed by the NERC data policy and supplied under Open Government Licence v.3 otherRestrictions There are no access constraints. url url largerWorkCitation url url largerWorkCitation url url crossReference textTable eng utf8 biota -45.6 -45.6 -60.7 -60.7 1978-11-26 2021-01-16 It is recommended that careful attention be paid to the contents of any data, and that the author be contacted with any questions regarding appropriate use. If you find any errors or omissions, please report them to polardatacentre@bas.ac.uk. NERC EDS UK Polar Data Centre +44 (0)1223 221400 British Antarctic Survey, High Cross, Madingley Road Cambridge Cambridgeshire CB3 0ET United Kingdom PDCServiceDesk@bas.ac.uk https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/ information distributor text/csv bytes 5888 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=883c6b40-024e-41e8-9c3e-2668a44b5751 WWW:LINK-1.0-http--link Get Data Download data download dataset Methodology: Gentoo penguin colonies, predetermined as distinct groups of breeding pairs, were selected and surveyed using ground counts starting in the 1978-1979 season. In total, ten Gentoo colonies were surveyed annually, and in this dataset those colonies are combined for total counts per season. Optimal count dates were determined by observed phenology each season. Monitoring comprised of counts of occupied nests and incubating nests for gentoo penguins. Nests were categorised as "incubating" (at least one egg present) and "occupied" (no eggs observed) either through manual nest marking, or observations from the colony edge using a tally counter. This was carried out one week after peak egg-laying (CEMP Standard Method A3A). Subsequently, fledgling counts were completed when all chicks had entered creche (CEMP Standard Method A6C). Counts were always individually repeated three times on the same day, until within 10 percent of each other. From the 2006/2007 season onwards, hand-held GPS devices were also used to provide specific coordinates of each surveyed colony. An annual index of breeding population size was then calculated by determining the means of the number of occupied nests and incubating nests for several aggregated colonies. Breeding success was calculated by taking the annual number of creched chicks prior to fledging, divided by the total number of breeding pairs Data quality: Standard CCAMLR (CEMP) monitoring methods were implemented in 1996. Prior to this date, counting methods and timing of counts may have varied, which should be considered when comparing counts and calculating inter-annual trends from previous seasons. For some seasons, only information on specific parameters was possible to obtain (when the base would open late/shut early). In some years, certain data pertaining to chick counts was not possible to obtain. For NA values in the column titled 'Total number of nests without eggs", which is carried out mid-season, some, if not all failed nests are abandoned by the time of the survey. Their stones are then stolen by other nesting birds, and the nests are no longer visible to field assistants. Abnormalities or the lack of data collected for other reasons is explained in the comments alongside that season's data. More details on the counts can be provided upon request to the Polar Data Centre. For this publication on annual gentoo penguin population monitoring, individual colony counts across the island were combined into totals per season. For additional details as to colony counts within Signy Island, please contact the Polar Data Centre. asNeeded completed