{"key":"4fb0d8de-b4dc-4843-91db-2bc64394bd83","installationKey":"5ff1c992-5c84-40aa-bd9a-c1743a870c32","publishingOrganizationKey":"c98a8d0d-cab2-4506-8c0f-c91a5e4996b9","doi":"10.15468/nyx88d","external":false,"numConstituents":0,"type":"OCCURRENCE","subtype":"OBSERVATION","title":"DFO Central and Arctic Multi-species Stock Assessment Surveys","description":"<p>The Fisheries and Oceans Canada Central and Arctic Region multi-species stock assessment surveys began in 1999 and are planned to continue indefinitely. Seven survey areas are defined within the spatial extents outlined here; northern NAFO 0A, southern NAFO 0A, NAFO 0B,SFA0, SFA1, SFA3 and western Hudson Strait. From 2006, the area surveyed alternates between NAFO 0A/SFA0&amp;1 in even numbered years and SFA3/NAFO 0B/western Hudson Strait in odd numbered years. \n\nThis dataset is the OBIS version of the stock assessment survey and only species presence information is included at this time for the years 2005-2015.</p>","language":"eng","homepage":"http://iobis.org/mapper/?resource_id=2293","logoUrl":"http://ipt.iobis.org/obiscanada/logo.do?r=aqua_mortality","citation":{"text":"Siferd T (2022). DFO Central and Arctic Multi-species Stock Assessment Surveys. Fisheries and Oceans Canada. Occurrence dataset https://doi.org/10.15468/nyx88d accessed via GBIF.org on 2026-10-11.","identifier":"http://iobis.org/mapper/?resource_id=2293","citationProvidedBySource":false},"contactsCitation":[{"key":6911960,"abbreviatedName":"Siferd T","firstName":"Tim","lastName":"Siferd","roles":["ORIGINATOR","METADATA_AUTHOR"],"userId":[]}],"lockedForAutoUpdate":false,"createdBy":"c98a8d0d-cab2-4506-8c0f-c91a5e4996b9","modifiedBy":"crawler.gbif.org","created":"2026-02-13T18:44:09.137+00:00","modified":"2026-02-13T18:45:11.148+00:00","contacts":[{"key":6911960,"type":"ORIGINATOR","primary":true,"userId":[],"firstName":"Tim","lastName":"Siferd","position":["Fisheries Biologist"],"email":["tim.siferd@dfo-mpo.gc.ca"],"phone":[],"homepage":[],"organization":"Fisheries and Oceans Canada","address":["Freshwater Institute, 501 University Crescent"],"city":"Winnipeg","province":"Manitoba","country":"CA","postalCode":"R3T 2N6","createdBy":"crawler.gbif.org","modifiedBy":"crawler.gbif.org","created":"2026-02-13T18:45:11.115+00:00","modified":"2026-02-13T18:45:11.115+00:00"},{"key":6911961,"type":"METADATA_AUTHOR","primary":true,"userId":[],"firstName":"Tim","lastName":"Siferd","position":["Fisheries Biologist"],"email":["tim.siferd@dfo-mpo.gc.ca"],"phone":[],"homepage":[],"organization":"Fisheries and Oceans Canada","address":["Freshwater Institute, 501 University Crescent"],"city":"Winnipeg","province":"Manitoba","country":"CA","postalCode":"R3T 2N6","createdBy":"crawler.gbif.org","modifiedBy":"crawler.gbif.org","created":"2026-02-13T18:45:11.117+00:00","modified":"2026-02-13T18:45:11.117+00:00"},{"key":6911962,"type":"PUBLISHER","primary":false,"userId":[],"lastName":"OBIS Canada","position":["data management team"],"email":["mary.kennedy@dfo-mpo.gc.ca"],"phone":[],"homepage":[],"organization":"Fisheries and Oceans Canada","address":["Bedford Institute of Oceanography"],"city":"Dartmouth","province":"Nova Scotia","country":"CA","postalCode":"B2Y 4A2","createdBy":"crawler.gbif.org","modifiedBy":"crawler.gbif.org","created":"2026-02-13T18:45:11.118+00:00","modified":"2026-02-13T18:45:11.118+00:00"},{"key":6911963,"type":"ADMINISTRATIVE_POINT_OF_CONTACT","primary":true,"userId":[],"firstName":"Sheila","lastName":"Atchison","position":["Aquatic Biologist"],"email":["sheila.atchison@dfo-mpo.gc.ca"],"phone":[],"homepage":[],"organization":"Fisheries and Oceans Canada","address":["Freshwater Institute, 501 University Crescent"],"city":"Winnipeg","province":"Manitoba","country":"CA","postalCode":"R3T 2N6","createdBy":"crawler.gbif.org","modifiedBy":"crawler.gbif.org","created":"2026-02-13T18:45:11.120+00:00","modified":"2026-02-13T18:45:11.120+00:00"}],"endpoints":[{"key":1242819,"type":"DWC_ARCHIVE","url":"https://ipt.iobis.org/obiscanada/archive.do?r=obis_dfo_cna_multispeciessurveys","createdBy":"c98a8d0d-cab2-4506-8c0f-c91a5e4996b9","modifiedBy":"c98a8d0d-cab2-4506-8c0f-c91a5e4996b9","created":"2026-02-13T18:44:09.265+00:00","modified":"2026-02-13T18:44:09.265+00:00","machineTags":[]},{"key":1242818,"type":"EML","url":"https://ipt.iobis.org/obiscanada/eml.do?r=obis_dfo_cna_multispeciessurveys","createdBy":"c98a8d0d-cab2-4506-8c0f-c91a5e4996b9","modifiedBy":"c98a8d0d-cab2-4506-8c0f-c91a5e4996b9","created":"2026-02-13T18:44:09.232+00:00","modified":"2026-02-13T18:44:09.232+00:00","machineTags":[]}],"machineTags":[{"key":33014353,"namespace":"crawler.gbif.org","name":"crawl_attempt","value":"29","createdBy":"crawler.gbif.org","created":"2026-10-05T01:08:09.856+00:00"}],"tags":[],"identifiers":[{"key":463591,"type":"URL","identifier":"http://ipt.iobis.org/obiscanada/resource?r=obis_dfo_cna_multispeciessurveys","createdBy":"crawler.gbif.org","created":"2026-02-13T18:45:11.122+00:00","primary":false}],"comments":[],"bibliographicCitations":[{"text":"Treble, M. A. 2009. Report on Greenland halibut caught during the 2008 trawl surveys in NAFO Division 0A. NAFO SCR Doc. 09/26","citationProvidedBySource":false}],"curatorialUnits":[],"taxonomicCoverages":[{"description":"The survey collects fishery-independent information necessary for the assessment of stock status for the commercially exploited species, northern shrimp (Pandalus borealis) and striped shrimp (Pandalus montagui) and Greenland halibut (Reinhardtius hippoglossoides). The surveys also provides distribution and abundance information on all species collected in the trawls and environmental monitoring in these northern areas. \n\n278 names with 3 not in WoRMS - Priapula, Eualus gaimardii belcherii, Decabrachia\n\nTaxonomic list contains names from three kingdoms and the following phyla:\nAnimalia: Annelida;Arthropoda; Brachiopoda; Chaetognatha; Chordata; Cnidaria; Echinodermata; Echiura; Mollusca; Platyhelminthes; Porifera; Sipuncula\nPlantae: Tracheophyta\nChromista: Foraminifera; Ochrophyta","coverages":[{"scientificName":"Annelida","rank":{"verbatim":"phylum","interpreted":"PHYLUM"}},{"scientificName":"Arthropoda","rank":{"verbatim":"phylum","interpreted":"PHYLUM"}},{"scientificName":"Brachiopoda","rank":{"verbatim":"phylum","interpreted":"PHYLUM"}},{"scientificName":"Chaetognatha","rank":{"verbatim":"phylum","interpreted":"PHYLUM"}},{"scientificName":"Chordata","rank":{"verbatim":"phylum","interpreted":"PHYLUM"}},{"scientificName":"Cnidaria","rank":{"verbatim":"phylum","interpreted":"PHYLUM"}},{"scientificName":"Echinodermata","rank":{"verbatim":"phylum","interpreted":"PHYLUM"}},{"scientificName":"Echiura","rank":{"verbatim":"phylum","interpreted":"PHYLUM"}},{"scientificName":"Hemichordata","rank":{"verbatim":"phylum","interpreted":"PHYLUM"}},{"scientificName":"Sipuncula","rank":{"verbatim":"phylum","interpreted":"PHYLUM"}},{"scientificName":"Mollusca","rank":{"verbatim":"phylum","interpreted":"PHYLUM"}},{"scientificName":"Nemertina","rank":{"verbatim":"phylum","interpreted":"PHYLUM"}},{"scientificName":"Platyhelminthes","rank":{"verbatim":"phylum","interpreted":"PHYLUM"}},{"scientificName":"Bryozoa","rank":{"verbatim":"phylum","interpreted":"PHYLUM"}},{"scientificName":"Ctenophora","rank":{"verbatim":"phylum","interpreted":"PHYLUM"}}]}],"geographicCoverages":[{"description":"Seven survey areas are defined within the spatial extents outlined here;  Northwest Atlantic Fisheries Organization(NAFO) survey areas - northern NAFO 0A (72.5°N-75.75°N to 80°W), southern NAFO 0A (66.25°N-72.5°N), NAFO 0B (61°N-66.25°N to 64.4°W); Canadian Shrimp Fishing Areas(SFA) - SFA0 (66.25°N-75.75°N, 60.5°W-80°W), SFA1 (66.25°N-68.9°N, east of 60.5°W), SFA3 (66°W-70°W) and western Hudson Strait (70°W-78°W).\nExperimental work was conducted in Resolution Island Survey Area (RISA) in two strata south west of Resolution Island in 2007.","boundingBox":{"minLatitude":57.614,"maxLatitude":75.576,"minLongitude":-79.734,"maxLongitude":-57.564,"globalCoverage":false}}],"temporalCoverages":[{"@type":"range","start":"2005-07-29T00:00:00.000+00:00","end":"2015-10-10T00:00:00.000+00:00"}],"keywordCollections":[{"thesaurus":"GCMD keyword thesaurus","keywords":["biological classification","biota","oceans"]},{"thesaurus":"GBIF Dataset Type Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_type.xml","keywords":["Occurrence"]},{"thesaurus":"GBIF Dataset Subtype Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_subtype.xml","keywords":["Observation"]}],"samplingDescription":{"studyExtent":"Version 1 of the OBIS dataset:  The 2007 multi-species stock assessment survey of SFA3 and RISA was conducted from 12 October to 7 November. Sixty-none of the seventy sets allocated to SFA3 were taken successfully with the Cosmos trawl.\nVersion 2 of the OBIS dataset: temporal extent expanded and included records from 2006 to 2010.\nVersion 3 of the OBIS dataset: temporal extent expanded and included records from 2006 to 2012.\nVersion 4\nVersion 5 of the OBIS dataset: temporal extent expanded and included records from 2006 to 2014.\nVersion 6 of the OBIS dataset: temporal extent expanded and included records from 2006 to 2015.","sampling":"Surveys are conducted with the Greenland Institute of Natural Resources' (GINR) research vessel Paamiut using either an Alfredo (NAFO 0A & 0B) trawl or Cosmos shrimp trawl (SFA 0,1,3 and western Hudson Strait) depending on the focus species in the particular survey area. The target set for the Alfredo trawl is 3.0 knots towed for 30 minutes and for the Cosmos trawl 2.6 knots for 15 minutes. Trawl geometry is monitored for door spread wing spread, net height and bottom contact. Environmental data, temperature, salinity and depth, currently collect for each set with a trawl-mounted Seabird 19plus CTD but also collected with Seamon and Star-Oddi equipment prior to 2007. Surveys are stratified random proportioned by stratum area with a two set minimum. Sampling sites are allocated using the buffered random sampling (BRS) protocol of Kingsley et al. 2004. Shrimp surveys sample waters from 100-800m stratified in contours of 100-200, 200-300, 300-400, 400-600 and 600-800m. Greenland halibut surveys sample waters from 400-1500m with contour intervals of 400-600, 600-800, 800-1000, 1000-1200, 1200-1400 and 1400-1500m.\n\nExperimental work was conducted in RISA in two strata south west of Resolution Island looking at the effects of tide/current and survey design on the overall results of the survey.","methodSteps":["Records for Version 5 of this resource were downloaded from the source database in 2015. Taxonomic name associated with the records were first mapped to WoRMS and when not available to ITIS and spelling variations revised to that of the standard.  DwC fields were populated after consultation with the resource creator. Version 6 was created in 2016"]},"countryCoverage":[],"collections":[],"dataDescriptions":[],"dataLanguage":"eng","pubDate":"2022-03-29T00:00:00.000+00:00","maintenanceUpdateFrequency":"UNKOWN","maintenanceDescription":"","license":"http://creativecommons.org/licenses/by/4.0/legalcode","dwca":{"coreType":"http://rs.tdwg.org/dwc/terms/Occurrence","extensions":[],"modified":"2026-02-13T18:45:11.051+00:00"},"approximateCounts":{"occurrenceCount":95253}}