This dataset contains trawl survey data used primarily for assessing the status of snow crab stocks in the southern Gulf of St. Lawrence.
","language":"eng","logoUrl":"http://ipt.iobis.org/obiscanada/logo.do?r=dfo_gulf_snowcrabsurveys_2010_2020","citation":{"text":"Hébert M, Gagnon D (2022). DFO Gulf Region Snow Crab Research Trawl Surveys 2010-2020. Fisheries and Oceans Canada. 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Wade, M. Biron, P. DeGrâce, J.-F. Landry and/et M. Moriyasu. 2010. The 2009 assessment of snow crab, Chionoecetes opilio, stock in the southern Gulf of St. Lawrence (Areas 12, 19, 12E and 12F). DFO Can. Sci. Advis. Sec. Res. Doc. 2010/091. vi + 85 p.","citationProvidedBySource":false},{"text":"M. Moriyasu, E. Wade, M. Hébert et M. Biron. 2008. Review of the survey and analytical protocols used for estimating abundance indices of southern Gulf of St. Lawrence snow crab from 1988 to 2006 = Revue du releve au chalut et du protocole utilise pour l'estimation des indices d'abondance de crabe des neiges dans le sud du golfe Saint-Laurent de 1988 a 2006. Research document (Canadian Science Advisory Secretariat); 2008/069. iii, 36 p.","citationProvidedBySource":false}],"curatorialUnits":[],"taxonomicCoverages":[],"geographicCoverages":[{"description":"Southern Gulf of St. Lawrence","boundingBox":{"minLatitude":45.901,"maxLatitude":48.878,"minLongitude":-65.641,"maxLongitude":-60.102,"globalCoverage":false}}],"temporalCoverages":[{"@type":"range","start":"2010-07-08T00:00:00.000+00:00","end":"2020-09-10T00:00:00.000+00:00"}],"keywordCollections":[{"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"]}],"project":{"title":"Snow crab research trawl survey database (Southern Gulf of St. Lawrence, Gulf region, Canada)","identifier":"SCS-sGSL","contacts":[{"type":"POINT_OF_CONTACT","primary":false,"userId":[],"firstName":"Denis","lastName":"Gagnon","position":[],"email":[],"phone":[],"homepage":[],"address":[]}],"funding":"The survey is largely funded through agreements with local snow crab fishing industry.","awards":[],"studyAreaDescription":"The study area encompasses the majority of snow crab habitat in the southern Gulf of St. Lawrence, between the 20 and 200 fathom isobaths.","designDescription":"The spatial sampling design is a based on a random stations placed within a grid lattice overlaying the survey area. Survey stations are generally held fixed from year to year.","relatedProjects":[]},"samplingDescription":{"studyExtent":"The Southern Gulf of St. Lawrence snow crab bottom trawl survey has taken place yearly since 1988 with the exception of 1996 when partnerships with industry ceased and no funding was available. The survey is conducted after the local fisheries are closed from early to mid-July and ends in early to mid-September.","sampling":"The survey uses a Bigouden Nephrops bottom trawl towed over the bottom during 5 minutes at a speed of approximately 2 knots. All snow crab are sexed, counted and measured. By-catches are counted or weighted. Catches are standardized using individual estimates of trawl swept area.","qualityControl":"Scientific names listed in the source database species list have been mapped to recognized standards - marine taxa have been mapped to the World Register of Marine Species (WoRMS). The respective codes(WoRMS AphiaIDs) have been included in this resource in the scientificNameID field as LSIDs.","methodSteps":["The DwC field dynamicproperties for records in this resource contains information on the trawl swept area (m2) and also indicates that the classification fields are based upon WoRMS. \nExample, \"Sample size = 3692.8282 meters square; Classification=WoRMS\""]},"countryCoverage":[],"collections":[],"dataDescriptions":[],"dataLanguage":"eng","purpose":"These data are for display on the OBIS portal and associated mapping programs and for download to personal computers for ad-hoc end-user analysis.
","additionalInfo":"Access Constraints: none\nUse Constraints:\nAcknowledge the use of specific records from contributing databases in the form appearing in the 'Citation' field thereof (if any); and acknowledge the use of the OBIS facility. \n\nFor information purposes, email to info@iobis.org the full citation of any publication made (printed or electronic) that cites OBIS or any constituent part. \n\nRecognize the limitations of data in OBIS. See http://www.iobis.org/data/policy/disclaimer for more details\n\nFor OBIS Schema concept details see http://www.iobis.org/node/304","pubDate":"2022-03-30T00:00:00.000+00:00","maintenanceUpdateFrequency":"UNKOWN","maintenanceDescription":"","license":"http://creativecommons.org/licenses/by-nc/4.0/legalcode","dwca":{"coreType":"http://rs.tdwg.org/dwc/terms/Occurrence","extensions":[],"modified":"2026-02-11T17:39:59.387+00:00"},"approximateCounts":{"occurrenceCount":47103}}