dfbcbbf9-8673-4fef-913f-64ea7942d97a 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 2020-04-14 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 KRILLBASE-length frequency database, a compilation of scientific net sampling data on length, sex and maturity stage of Euphausia superba around the Southern Ocean, 1926 to 2016 2020-04-14 creation 2020-04-14 revision 2020-04-14 publication 2020-04-14 released 1.0 https://doi.org/10.5285/dfbcbbf9-8673-4fef-913f-64ea7942d97a doi GB/NERC/BAS/PDC/01319 https://data.bas.ac.uk/ Please cite this item as: Atkinson, A., Pakhomov, E., Siegel, V., Jessopp, M., Peat, H., Kawaguchi, S., Hill, S., Loeb, V., Hewitt, R., Fielding, S., Tarling, G., Daly, K., Ashjian, C., Chiba, S., Ensor, N., Brewster, C., Watkins, J., Hosie, G., Ichii, T., ... ten Hoopen, P. (2020). KRILLBASE-length frequency database, a compilation of scientific net sampling data on length, sex and maturity stage of Euphausia superba around the Southern Ocean, 1926 to 2016 (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/dfbcbbf9-8673-4fef-913f-64ea7942d97a The KRILLBASE-length frequency database comprises individual length measurements of 613487 Euphausia superba from 6470 scientific net hauls. Some of these individually-measured krill have additional information on their sex and maturity stage. Most of these E. superba are postlarvae, but some of the hauls include small (< 20 mm) krill which likely include furcilia larvae as well as juveniles. Much of these data were compiled at British Antarctic Survey in 2007 by Mark Jessopp, with additional compilation by Angus Atkinson, Catherine Brewster and Natalie Ensor, and later data checking by Angus Atkinson with Helen Peat. The circumpolar distribution of records is illustrated in the file KRILLBASE_LF_DISTRIBUTION that is available along with this dataset. Examples of uses of KRILLBASE-length frequency are in Atkinson et al. (2009), Tarling et al. (2016), Perry et al. (2019) and Atkinson et al. (2019). The KRILLBASE-length frequency records were provided by contributing authors of the database or transcribed from the literature or from other institutional databases. At the time of data compilation, data from commercial-size large mesh trawls and from the commercial fishery was also transcribed, providing valuable information on the larger krill caught by these nets. These data are not included in this current KRILLBASE-length frequency database version, because of the difficulty in comparing them with the finer mesh scientific nets compiled here, and because length and population structure are also available in more complete form from CCAMLR. The KRILLBASE-length frequency database forms a complementary database to the KRILLBASE-abundance database (doi:10.5285/8b00a915-94e3-4a04-a903-dd4956346439), which compiles the abundance of Euphausia superba and salps in the Southern Ocean (Atkinson et al 2017). Both databases are multi-national, circumpolar compilations of net samples spanning years 1926 to 2016. The KRILLBASE-length frequency database uses some of the stations as KRILLBASE-abundance but also additional ones from targeted hauls or horizontal hauls. No credit. completed Atkinson, Angus PML (Plymouth Marine Laboratory), United Kingdom Researcher author Pakhomov, Evgeny University of British Columbia, Canada Researcher author Siegel, Volker Thuenen Institute of Sea Fisheries, Germany Researcher author Jessopp, Mark MaREI Centre, University College Cork, Ireland Researcher author Peat, Helen British Antarctic Survey Researcher author Kawaguchi, So Australian Antarctic Division Researcher author Hill, Simeon British Antarctic Survey Researcher author Loeb, Valerie Moss Landing Marine Laboratories, USA Researcher author Hewitt, Roger Southwest Fisheries Science Center, NOAA/National Marine Fisheries Service, USA Researcher author Fielding, Sophie British Antarctic Survey Researcher author Tarling, Geraint British Antarctic Survey Researcher author Daly, Kendra College of Marine Science, University of South Florida, USA Researcher author Ashjian, Carin Woods Hole Oceanographic Institution, USA Researcher author Chiba, Sanae JAMSTEC, Japan Researcher author Ensor, Natalie British Antarctic Survey Researcher author Brewster, Catherine British Antarctic Survey Researcher author Watkins, Jonathan L British Antarctic Survey Researcher author Hosie, Graham Sir Alister Hardy Foundation for Ocean Science (SAHFOS), United Kingdom Researcher author Ichii, Taro National Research Institute of Far Seas Fisheries, Japan Researcher author Gerrish, Laura British Antarctic Survey Researcher author ten Hoopen, Petra British Antarctic Survey 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 > Indicator Species EARTH SCIENCE > Oceans > Marine Biology > Marine Invertebrates EARTH SCIENCE > Oceans > Marine Environment Monitoring 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 Antarctic krill Euphausia superba KRILLBASE length frequency theme Southern Ocean place Habitats and biotopes Oceanographic geographical features 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 dataset is released under Open Government Licence, version 3.0 (). We ask users of these data to kindly follow these guidelines: 1. Consult all appended files to avoid errors in interpretation. As for KRILLBASE-abundance, KRILLBASE-length frequency is a complex dataset comprising information from a wide variety of net sampling methods. Users are strongly urged to read this Discovery Metadata record and all files accompanying the LENGTH_DATA_20200201 file in order to screen the data appropriately to avoid erroneous conclusions being drawn. 2. Report any errors in the data to the Polar Data Centre at British Antarctic Survey polardatacentre@bas.ac.uk. This will allow us to log these changes and incorporate them into the next version. 3. To cite the data appropriately in any publications by means of its DOI. doi doi crossReference url url crossReference doi doi crossReference doi doi crossReference doi doi crossReference doi doi crossReference doi doi crossReference url url crossReference url url crossReference textTable eng utf8 biota environment oceans -179.333 178.6665 -77.2502 -40.7502 1926-12-20 2015-12-07 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 image/jpeg text/plain text/csv image/jpeg text/plain text/csv bytes 17616077 http://apex.nerc-bas.ac.uk/f?p=198:1:0 WWW:LINK-1.0-http--link Get Data Download data download bytes 17616077 http://apex.nerc-bas.ac.uk/f?p=198:1:0 WWW:LINK-1.0-http--link Get Data Download data download bytes 17616077 http://apex.nerc-bas.ac.uk/f?p=198:1:0 WWW:LINK-1.0-http--link Get Data Download data download bytes 17616077 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=dfbcbbf9-8673-4fef-913f-64ea7942d97a WWW:LINK-1.0-http--link Get Data Download data download bytes 17616077 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=dfbcbbf9-8673-4fef-913f-64ea7942d97a WWW:LINK-1.0-http--link Get Data Download data download bytes 17616077 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=dfbcbbf9-8673-4fef-913f-64ea7942d97a WWW:LINK-1.0-http--link Get Data Download data download dataset Methodology: The sampling information of each component haul is provided in the file named HAUL_METADATA_20200201. This file contains all the net sampling information (for example, net type, sampling depth, when and where the net haul was taken, environmental information etc). In this file, each row refers to a single sampling event (such as a single net haul). This is identified by the unique character string in its 'REF' column. The file README_HAUL_METADATA gives a complete description of each column of the HAUL_METADATA_20200201 file, and needs to be consulted before the data are used. The file entitled LENGTH_DATA_20200201 contains all the individual measurements of the krill (length, sex and maturity stage, where available) and in this file each row represents one individual krill measured. The file README_LENGTH_DATA provides a description of each column of the LENGTH_DATA_20200201 file. The information in the metadata table and the length table can be linked using the 'REF' column. The file NET_CODES_20200201 describes the nets in more detail and NET_TRAJECTORY_20200201 describes the types of net haul. The figure in the file KRILLBASE_LF_DISTRIBUTION describes the circumpolar distribution of records. Data collection: Details of nets used are described in the file NET_CODES_20200201, types of net hauls are listed in the file NET_TRAJECTORY_20200201. Data quality: Please note that in some of the net hauls, the sampling information is incomplete. All blank fields are absent data, not zeros. In plotting the data against GEBCO bathymetry to determine water depth, it was found that a handful of stations plotted on ice shelves or on land. Water depths for these have been left blank. These may represent rounding errors for positions or incorrect latitudes and longitudes. We transcribed data as they were given to us, accepting the possibility of mistakes or rounding errors in the data. Users of the data are requested to check metadata and all associated files. asNeeded completed