e184e81a-e43c-424e-abec-122036ee2cfd 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 2020-06-12 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 Macrozooplankton and nekton vertical distribution and abundance at the sustained observation location P3 in the northern Scotia Sea (Southern Ocean) during November and December 2017 2020-06-12 creation 2020-06-12 revision 2020-06-12 publication 2020-06-12 released 1.0 https://doi.org/10.5285/e184e81a-e43c-424e-abec-122036ee2cfd doi GB/NERC/BAS/PDC/01337 https://data.bas.ac.uk/ Please cite this item as: Stowasser, G., Fielding, S., Belcher, A., Mayor, D., Cook, K., & Tarling, G. (2020). Macrozooplankton and nekton vertical distribution and abundance at the sustained observation location P3 in the northern Scotia Sea (Southern Ocean) during November and December 2017 (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/e184e81a-e43c-424e-abec-122036ee2cfd Macrozooplankton and nekton were collected with a Rectangular Midwater Trawl 25 (RMT25) over several visits to the sustained observation location P3 (52.70 S, 40.26 W) in the northern Scotia Sea during November and December 2017. The work was carried out as part of the NERC Large Grant, COMICS (Controls on Mesopelagic Interior Carbon) on board the RRS Discovery (cruise DY086). The RMT25 net hauls sampled between 10 and 500 m depth, with the water column divided into 2 depth intervals (10-250 m and 250-500 m). A total of 6 hauls were obtained during 3 separate visits to station P3, each visit comprising a pair of hauls, of which one was carried out in nominal daytime and the other in nominal nighttime. Catches were immediately sorted on board and identified to the lowest taxonomic level feasible. Subsamples of the catches were retained, principally for subsequent biochemical and physiological analyses. In total, 777 fish were caught, belonging to at least 23 species, with catches dominated by the myctophids Krefftichthys anderssoni, Gymnoscopelus braueri, Electrona antarctica and Protomyctophum tenesoni. The water column below 250m was dominated by Bathylagus spp. Temperate myctophid species, such as Protomyctophum parallelum and Protomyctophum andreyeshevi were also caught in small numbers. With regards macrozooplankton, the 250m-500m depth interval was dominated by the jellyfish, Atolla and Periphylla. The tunicate Salpa thompsoni and the euphausiids Euphausia triacantha and Thysanoessa spp. were also relatively abundant. Jellyfish still dominated catches in shallower waters (250m-10m), closely followed by euphausiids and Salpa thompsoni and chaetognaths. Themisto gaudichaudii and Parandania boecki were the most numerous amphipod species caught. Decapods were only caught in the deeper depth interval, both day and night. No credit. completed Stowasser, Gabriele British Antarctic Survey Researcher author Fielding, Sophie British Antarctic Survey Researcher author Belcher, Anna British Antarctic Survey Researcher author Mayor, Daniel National Oceanography Centre Researcher author Cook, Kathryn National Oceanography Centre Researcher author Tarling, Geraint 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 > Biodiversity EARTH SCIENCE > Biosphere > Microbiota Taxonomy > Zooplankton 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 Amphipods Chaetognaths Cnidaria Euphausiids Mesopelagic Myctophids theme Scotia Sea 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 is NERC-funded data, and its use must follow the Open Government License: otherRestrictions None. doi doi crossReference doi doi crossReference doi doi crossReference doi doi crossReference doi doi crossReference url url crossReference url url largerWorkCitation url url crossReference url url crossReference textTable eng utf8 biota environment oceans -40.26 -40.26 -52.7 -52.7 2017-11-17 2017-12-10 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/plain text/csv bytes 175411 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=e184e81a-e43c-424e-abec-122036ee2cfd WWW:LINK-1.0-http--link Get Data Download data download bytes 175411 https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=e184e81a-e43c-424e-abec-122036ee2cfd WWW:LINK-1.0-http--link Get Data Download data download dataset Methodology: An RMT25 net was used to sample the mesopelagic fish, squid and macrozooplankton community during the survey DY086 at the sustained observation station P3 (52.70°S, 40.26°W) in the northern Scotia Sea, Southern Ocean. The RMT25 is a midwater trawl with a mouth area of 25 m2 and a variable mesh size, 18 mm reducing to 5 mm towards the cod-end. The RMT25 used in this instance had two separate nets allowing two different depth intervals to be sampled discretely. These intervals were set at 500-250 m and 250-10 m. Samples were collected across three time stations (P3 A, P3 B and P3 C) approximately 10 days apart. At each time station, one deployment was undertaken during the hours of darkness and one in daylight, making a total of 6 deployments over the entire cruise. The RMT25 was operated via a downwire net monitor and was equipped with a flow meter, and temperature and salinity sensors. Each depth interval was sampled for approximately 40 mins while the ship maintained a speed of 2 knots. When retrieved, the total weight of each RMT25 net haul was initially recorded with a calibrated, motion compensated weighing scales before further taxonomic analysis. All fish, squid and macrozooplankton specimens were identified to species level, where possible, and the composite weight and numbers per species recorded. Where necessary, sub-samples of the total catch of a species were counted and then multiplied by the inverse of the sub-sample fraction to determine total numbers in the catch. After sorting, a sub sample of specimens were either frozen for stable isotope and lipid analysis at -80°C or flash-frozen in liquid nitrogen for ETS (details not recorded here). The abundances and weights in the datasheets are those directly recorded after the catch was sorted on board. Subsequent dry weights were calculated based on wet weight to dry weight relationships, either reported in the literature or obtained from dry weight measurements on specimens retained from this cruise or similar cruises in this region (listed in datasheets). Data collection: 1. An RMT25 trawl (25m2 mouth diameter, 5 mm minimum mesh size) 2. Motion-compensated weighing scales 3. Volumetric flasks 4. Binocular microscope Data quality: All species were identified according to the taxonomic guides available at time of analysis and the user must be aware that some species names may have since been updated. The entire catch was sorted and all specimens above ~4 mm were recorded at least to a low taxonomic level. The absence of any taxon from the datasheet indicates that it was not present in the catch. asNeeded completed