{"datasetrec":{"DasID":7872,"Acronym":"BFTDK","StandardTitle":"Decadal tracking of Atlantic Bluefin Tuna","OrigTitle":null,"OrigTitleLangID":null,"OrigTitleLangCode":null,"OrigTitleLang":null,"OrigTitleLangNL":null,"VersionName":null,"ContactEmail":"kaa@aqua.dtu.dk","VersionDate":null,"VersionDay":null,"VersionMonth":null,"VersionYear":null,"SizeReference":null,"EngAbstract":"In 1930-50 bluefin tuna were commertially fished in Denmark and Sweeden, but catches gradually dissapear in the next decades. Same happened to sport fishing. After decades of absence, bluefin tuna have recently been sighted again in the Northeastern Atlantic, inter alia off the coast of Bohuslän and in the Skagerrak and Kattegat. In 2016 and 2017, large schools of several hundred large individuals were observed. These adult fish hunted mackerel and herring during late summer and autumn. The reasons for the return and origin of the bluefin tuna in the North Sea-Skagerrak-Kattegat are unknown. This project will use electronic tags to help understand its migration patterns and behavior, avoid unwanted bycatch and support sustainable management of the stock. Attaching long life acoustic tags holds the potential to observe transatlantic migration as well as repeatability of the migratory pattern, by using the OTN network of receivers.","EngDescr":"In 1930-1950, bluefin tuna were commercially fished in Denmark and Sweden. Landings were several hundred tonnes per year, with a peak of 2000t in Sweden in 1942. Fishing continued in the next two decades and then it gradually disappeared. Sport fishing for bluefin tuna in the Kattegat and the Sound continued until the 1960s. But then, bluefin tuna catches became increasingly rare. After decades of absence, bluefin tuna have recently been sighted again in the Northeastern Atlantic, inter alia off the coast of Bohuslän and in the Skagerrak and Kattegat. In 2016 and 2017, large schools of several hundred large individuals were observed. These adult fish hunted mackerel and herring during late summer and autumn. The reasons for the return and origin of the bluefin tuna in the North Sea-Skagerrak-Kattegat are unknown. This project will use electronic tags to help understand its migration patterns and behavior, avoid unwanted bycatch and support sustainable management of the stock. Attaching long life acoustic tags holds the potential to observe transatlantic migration as well as repeatability of the migratory pattern, by using the OTN network of receivers.","OrigAbstract":null,"OrigDescr":null,"Comments":null,"ReleaseDate":null,"ReleaseDate0":null,"OrigDescrLang":null,"EmbargoDate":null,"OrigDescrLangNL":null,"OrigLangCode":null,"OrigLangCodeExtended":null,"OrigLangID":null,"DescrCompFlag":0,"DescrTransFlag":0,"Citation":"Aarestrup, K. 2018. Decadal tracking of Atlantic Bluefin Tuna","AccessConstraints":null,"UDate":"2023-11-30","CDate":"2021-09-10","CurrencyDate":null,"RevisionDate":null,"DateLastModified":{"date":"2026-06-05 01:37:23.644310","timezone_type":1,"timezone":"+02:00"},"CheckedFlag":0,"PublicFlag":1,"VlizCoreFlag":1,"MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"StatusID":1,"DasType":"Data","DasTypeID":1,"DasOrigin":"Research: field survey","Progress":"In Progress","AccessConstraint":"Attribution (CC BY)","AccConstrEN":"Attribution (CC BY)","AccConstrDisplay":"<a rel=\"license\" href=\"https://creativecommons.org/licenses/by/4.0/\" target=\"_blank\"><img alt=\"Creative Commons License\" style=\"border:0px;height:15px;width:80px;vertical-align:middle;\" src=\"https://www.marinespecies.org/aphia/images/cc/by.png\" /></a> This dataset is licensed under a <a rel=\"license\" href=\"https://creativecommons.org/licenses/by/4.0/\" target=\"_blank\">Creative Commons Attribution 4.0 International License</a>.","License":"https://creativecommons.org/licenses/by/4.0/","AccConstrDescription":"This license lets others distribute, remix, tweak, and build upon your work, even commercially, as long as they credit you for the original creation. This is the most accommodating of licenses offered. Recommended for maximum dissemination and use of licensed materials.","Lineage":null,"AccConID":21},"dois":null,"spcols":[{"SpColID":1000,"SpName":"European Tracking Network"}],"keywords":[{"ThesaurusTerm":"Acoustic data","ThesTypID":1,"ThesType":"ASFA Thesaurus List","Code":"c_54b338c3","Description":null,"OrigThesTerm":"Acoustic data","DutchTerm":null,"URI":"http://aims.fao.org/aos/agrovoc/c_54b338c3","DasKeywordDescr":null},{"ThesaurusTerm":"Acoustic telemetry","ThesTypID":1,"ThesType":"ASFA Thesaurus List","Code":"c_3563933f","Description":null,"OrigThesTerm":"Acoustic telemetry","DutchTerm":null,"URI":"http://aims.fao.org/aos/agrovoc/c_3563933f","DasKeywordDescr":null},{"ThesaurusTerm":"Acoustic Telemetry","ThesTypID":30,"ThesType":"ETN Context","Code":null,"Description":"Acoustic telemetry uses acoustic signals (also called ‘pings’) which propagate into the water, and are detected by acoustic receivers","OrigThesTerm":"Acoustic Telemetry","DutchTerm":"Akoestische Telemetrie","URI":null,"DasKeywordDescr":null},{"ThesaurusTerm":"Bluefin","ThesTypID":14,"ThesType":"ICES Platform codes (C17)","Code":"331I","Description":"<country>United States</country><platformclass>research vessel</platformclass><callsign>WDC7379</callsign><MMSI>367070510</MMSI><IMO>8036586</IMO><commissioned>2004</commissioned><length>53.6</length><built>1980</built><previous_name>SALLY J</previous_name>","OrigThesTerm":"Bluefin","DutchTerm":null,"URI":"http://vocab.nerc.ac.uk/collection/C17/current/331I","DasKeywordDescr":null},{"ThesaurusTerm":"Bluefin tuna","ThesTypID":0,"ThesType":null,"Code":null,"Description":null,"OrigThesTerm":"Bluefin tuna","DutchTerm":null,"URI":null,"DasKeywordDescr":null},{"ThesaurusTerm":"Commercial fishing","ThesTypID":1,"ThesType":"ASFA Thesaurus List","Code":"c_69c4ff63","Description":null,"OrigThesTerm":"Commercial fishing","DutchTerm":null,"URI":"http://aims.fao.org/aos/agrovoc/c_69c4ff63","DasKeywordDescr":null},{"ThesaurusTerm":"Fish behaviour","ThesTypID":0,"ThesType":null,"Code":null,"Description":null,"OrigThesTerm":"Fish behaviour","DutchTerm":null,"URI":null,"DasKeywordDescr":null},{"ThesaurusTerm":"Fish migration","ThesTypID":0,"ThesType":null,"Code":null,"Description":null,"OrigThesTerm":"Fish migration","DutchTerm":"Vismigratie","URI":null,"DasKeywordDescr":null},{"ThesaurusTerm":"Fisheries Management","ThesTypID":10,"ThesType":"Assemble Sectors","Code":null,"Description":null,"OrigThesTerm":"Fisheries Management","DutchTerm":null,"URI":null,"DasKeywordDescr":null},{"ThesaurusTerm":"Kattegat S","ThesTypID":14,"ThesType":"ICES Platform codes (C17)","Code":"26KT","Description":"<country>Denmark</country><platformclass>vessel at fixed position</platformclass>","OrigThesTerm":"Kattegat S","DutchTerm":null,"URI":"http://vocab.nerc.ac.uk/collection/C17/current/26KT","DasKeywordDescr":null},{"ThesaurusTerm":"Migration patterns","ThesTypID":0,"ThesType":null,"Code":null,"Description":null,"OrigThesTerm":"Migration patterns","DutchTerm":null,"URI":null,"DasKeywordDescr":null},{"ThesaurusTerm":"Migrations","ThesTypID":1,"ThesType":"ASFA Thesaurus List","Code":null,"Description":null,"OrigThesTerm":"Migrations","DutchTerm":"Migraties","URI":null,"DasKeywordDescr":null},{"ThesaurusTerm":"North sea","ThesTypID":4,"ThesType":"CAB Thesaurus","Code":"80045","Description":null,"OrigThesTerm":"North sea","DutchTerm":null,"URI":"https://id.cabi.org/cabt/80045","DasKeywordDescr":null},{"ThesaurusTerm":"Northeast atlantic","ThesTypID":4,"ThesType":"CAB Thesaurus","Code":"80052","Description":null,"OrigThesTerm":"Northeast atlantic","DutchTerm":null,"URI":"https://id.cabi.org/cabt/80052","DasKeywordDescr":null},{"ThesaurusTerm":"Ocean migration","ThesTypID":0,"ThesType":null,"Code":null,"Description":null,"OrigThesTerm":"Ocean migration","DutchTerm":null,"URI":null,"DasKeywordDescr":null},{"ThesaurusTerm":"Sport fishing","ThesTypID":4,"ThesType":"CAB Thesaurus","Code":null,"Description":null,"OrigThesTerm":"Sport fishing","DutchTerm":null,"URI":null,"DasKeywordDescr":null},{"ThesaurusTerm":"Sweden","ThesTypID":34,"ThesType":"ASFA Geoterms","Code":null,"Description":null,"OrigThesTerm":"Sweden","DutchTerm":null,"URI":null,"DasKeywordDescr":null},{"ThesaurusTerm":"Swedish skagerrak coast","ThesTypID":0,"ThesType":null,"Code":null,"Description":null,"OrigThesTerm":"Swedish skagerrak coast","DutchTerm":null,"URI":null,"DasKeywordDescr":null},{"ThesaurusTerm":"Tracking","ThesTypID":1,"ThesType":"ASFA Thesaurus List","Code":"c_c4d65583","Description":null,"OrigThesTerm":"Tracking","DutchTerm":"Tracking; het volgen","URI":"http://aims.fao.org/aos/agrovoc/c_c4d65583","DasKeywordDescr":null},{"ThesaurusTerm":"Tuna fisheries","ThesTypID":1,"ThesType":"ASFA Thesaurus List","Code":"c_40059f89","Description":null,"OrigThesTerm":"Tuna fisheries","DutchTerm":null,"URI":"http://aims.fao.org/aos/agrovoc/c_40059f89","DasKeywordDescr":null}],"parents":[{"DasID":5912,"Acronym":null,"EngAbstract":"The European Tracking Network is a pan-European biotelemetry network that aims at the integration of regional telemetry initiatives into a sustainable, efficient and integrated network embedded in the international context. Data is integrated in the ETN data system that is part of the ETN virtual lab developed by LifeWatch.","License":"https://creativecommons.org/licenses/by/4.0/","StandardTitle":"European Tracking Network (ETN) data","doi":null,"vlizDoi":null}],"children":null,"othrel":null,"othrelrev":null,"ownerships":[{"OrderNr":1,"Surname":"Aarestrup","Firstname":"Kim","Initials":"K.","PerPublicFlag":1,"AdrID":161019,"Email":"kaa@aqua.dtu.dk","InsPublicFlag":1,"Acronym":"DTU Aqua","OrigNameLangCode":"da","OrigNameLangID":12,"FullOrigName":"Danmarks Tekniske Universitet; Institut for Akvatiske Ressourcer","InsOwnerCNT":1,"PersID":35670,"InsID":9029,"FullInstitute":"Technical University of Denmark; National Institute of Aquatic Resources","RoleID":24,"Role":"Contact","OrigName":"Institut for Akvatiske Ressourcer","StandardName":"National Institute of Aquatic Resources","FullAcronym":"DTU-DTU Aqua","ORC":"https://orcid.org/0000-0001-8521-6270","ROR":null}],"taxterms":[{"DasTaxtTypID":1,"DasTaxtType":"Taxonomic coverage","TaxtID":11873,"TaxTerm":"Pisces","AphiaID":11676,"DutchTerm":"Vissen"},{"DasTaxtTypID":1,"DasTaxtType":"Taxonomic coverage","TaxtID":21870,"TaxTerm":"Scombridae","AphiaID":125559,"DutchTerm":null},{"DasTaxtTypID":1,"DasTaxtType":"Taxonomic coverage","TaxtID":36865,"TaxTerm":"Thunnus","AphiaID":126065,"DutchTerm":null},{"DasTaxtTypID":1,"DasTaxtType":"Taxonomic coverage","TaxtID":12507,"TaxTerm":"Thunnus thynnus (Linneaus, 1758)","AphiaID":127029,"DutchTerm":null}],"frameworks":null,"otherterms":[{"OtherTerm":"Bluefin tuna"},{"OtherTerm":"Fish behaviour"},{"OtherTerm":"Fish migration"},{"OtherTerm":"Migration patterns"},{"OtherTerm":"Ocean migration"},{"OtherTerm":"Swedish skagerrak coast"}],"temporal":[{"DasDateID":5565,"StartYear":2018,"EndYear":null,"StartDay":24,"EndDay":null,"StartDate":"2018-08-24","EndDate":null,"DasDate":null,"Resolution":null,"ResolutionNL":null,"Notes":null,"StartMonth0":8,"StartMonth":"August","StartMonthNL":"Augustus","EndMonth0":null,"EndMonth":null,"EndMonthNL":null,"Progress":"In Progress","ProgressNL":"Gestart"}],"geographical":[{"GeoTerm":"Sweden","DasGeoID":13004,"DasGeoTerm":null,"DasID":7872,"GeotID":478,"X":null,"Y":null,"MaxX":null,"MaxY":null,"StationName":"Bohuslän","Precision":null,"CoordSystID":null,"GeoDatumID":null,"OrigCoordMinX":null,"OrigCoordMinY":null,"OrigCoordMaxX":null,"OrigCoordMaxY":null,"OrderNr":null,"Projection":null,"GeoDatum":null,"GeoObjectID":2180,"OrigGeoTerm":"Sweden","DutchTerm":null},{"GeoTerm":"Sweden","DasGeoID":13005,"DasGeoTerm":null,"DasID":7872,"GeotID":478,"X":null,"Y":null,"MaxX":null,"MaxY":null,"StationName":"Skagerrak","Precision":null,"CoordSystID":null,"GeoDatumID":null,"OrigCoordMinX":null,"OrigCoordMinY":null,"OrigCoordMaxX":null,"OrigCoordMaxY":null,"OrderNr":null,"Projection":null,"GeoDatum":null,"GeoObjectID":2180,"OrigGeoTerm":"Sweden","DutchTerm":null},{"GeoTerm":"Sweden","DasGeoID":13006,"DasGeoTerm":null,"DasID":7872,"GeotID":478,"X":null,"Y":null,"MaxX":null,"MaxY":null,"StationName":"Kattegat","Precision":null,"CoordSystID":null,"GeoDatumID":null,"OrigCoordMinX":null,"OrigCoordMinY":null,"OrigCoordMaxX":null,"OrigCoordMaxY":null,"OrderNr":null,"Projection":null,"GeoDatum":null,"GeoObjectID":2180,"OrigGeoTerm":"Sweden","DutchTerm":null}],"meastypes":[{"MethID":522,"DasMeasTypID":14121,"DasMeasType":null,"Matrix":"Water","MatrixNL":"Water","Parameter":"Fish detections","ParameterNL":null,"Description":null,"Unit":"Hz","Methodology":"Acoustic telemetry","Protocol":null,"QualityControl":null,"Precision":null,"Detectionlimit":null,"Instrument":null,"InstrumentUrl":null,"MethFull":"","ParaCategoryTitle":null,"ParaCatCode":null}],"dasthemes":[{"DasThemeID":21,"DasTheme":"Biology","DasTheme0":"Biology","DutchTerm":"Biologie"},{"DasThemeID":30,"DasTheme":"Biology > Ecology - biodiversity","DasTheme0":"Ecology - biodiversity","DutchTerm":"Ecologie - biodiversiteit"},{"DasThemeID":28,"DasTheme":"Biology > Fish","DasTheme0":"Fish","DutchTerm":"Vis"},{"DasThemeID":37,"DasTheme":"Fisheries > Fish stocks/catches/taggings","DasTheme0":"Fish stocks/catches/taggings","DutchTerm":"Visstocks/vangsten/merken"}],"projects":null,"refs":null,"urls":[{"URL":"https://members.oceantrack.org/OTN/project?ccode=BFTDK","externalID":null,"URLTypeCode":null,"URLType":"Dataset information","URLTypID":17,"downloadURL":null,"FileName":null},{"URL":"https://rshiny.lifewatch.be/etn-data/","externalID":null,"URLTypeCode":null,"URLType":"Online dataset","URLTypID":19,"downloadURL":null,"FileName":null}],"pictures":null,"urlmaps":null,"spatreps":null,"fileformats":null,"resmessage":"","complete":1}