{"datasetrec":{"DasID":6290,"Acronym":"EMMN","StandardTitle":"Early marine migration of European silver eel in northern Norway","OrigTitle":null,"OrigTitleLangID":null,"OrigTitleLangCode":null,"OrigTitleLang":null,"OrigTitleLangNL":null,"VersionName":null,"ContactEmail":null,"VersionDate":null,"VersionDay":null,"VersionMonth":null,"VersionYear":null,"SizeReference":null,"EngAbstract":"<p>To study the migratory behaviour in wild northern European silver eel <i>Anguilla anguilla</i> during sea entry and early marine migration, 32 individuals were tagged with acoustic transmitters and registered at four automatic listening station arrays from the mouth of the north Norwegian River Alta and throughout the Alta Fjord. The European eel entered the fjord during all parts of the tidal cycle and did not seem to utilize the outgoing tidal currents. They migrated mainly during the night, in both the river mouth and the fjord. On average, they spent 2.7 days travelling from the river mouth to the outermost array, 31 km from the river mouth, corresponding to an average migratory speed of 0.5 km/h. The European eel generally migrated in the central part of the fjord and in the uppermost 10–25% of the water column, but with frequent dives to greater depths. Already 4 km after sea entry, European eel were observed diving deeper than 130 m within 20–30 min periods. Hence, this study demonstrated that European eel may perform an active diving behaviour during the early marine migration. The study took place in a pristine area with a minimum of anthropogenic interventions and by individuals from a population still uninfected by the introduced parasite <i>Anguillicoloides crassus</i>. The results may therefore be used as a baseline for future studies of the European eel early marine migration.</p>","EngDescr":null,"OrigAbstract":null,"OrigDescr":null,"Comments":null,"ReleaseDate":null,"ReleaseDate0":null,"OrigDescrLang":null,"EmbargoDate":"2011-04-01","OrigDescrLangNL":null,"OrigLangCode":null,"OrigLangCodeExtended":null,"OrigLangID":null,"DescrCompFlag":0,"DescrTransFlag":0,"Citation":"Davidsen J G; Finstad B; Okland F; Thorstad E B; Mo T A; Rikardsen A H (2007) Early marine migration of European silver eel in northern Norway","AccessConstraints":null,"UDate":"2025-09-01","CDate":"2019-06-03","CurrencyDate":null,"RevisionDate":null,"DateLastModified":{"date":"2026-06-09 01:42:32.979540","timezone_type":1,"timezone":"+02:00"},"CheckedFlag":0,"PublicFlag":1,"VlizCoreFlag":1,"MarineFlag":1,"FreshFlag":0,"BrackishFlag":1,"TerrestrialFlag":0,"StatusID":1,"DasType":null,"DasTypeID":null,"DasOrigin":null,"Progress":"Completed","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 detection","ThesTypID":1,"ThesType":"ASFA Thesaurus List","Code":null,"Description":null,"OrigThesTerm":"Acoustic detection","DutchTerm":null,"URI":null,"DasKeywordDescr":null},{"ThesaurusTerm":"Acoustic devices","ThesTypID":1,"ThesType":"ASFA Thesaurus List","Code":null,"Description":null,"OrigThesTerm":"Acoustic devices","DutchTerm":null,"URI":null,"DasKeywordDescr":null},{"ThesaurusTerm":"Acoustic tags","ThesTypID":1,"ThesType":"ASFA Thesaurus List","Code":null,"Description":null,"OrigThesTerm":"Acoustic 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Early marine migration of European silver eel <i>Anguilla anguilla</i> in northern Norway. <i>J. Fish Biol. 78(5)</i>: 1390-1404. <a href=\"https://dx.doi.org/10.1111/j.1095-8649.2011.02943.x\" target=\"_blank\">https://dx.doi.org/10.1111/j.1095-8649.2011.02943.x</a>","RR":"<b>Davidsen, J.G. <i>et al.</i></b> (2011). Early marine migration of European silver eel <i>Anguilla anguilla</i> in northern Norway. <i>J. Fish Biol. 78(5)</i>: 1390-1404. <a href=\"https://dx.doi.org/10.1111/j.1095-8649.2011.02943.x\" target=\"_blank\">https://dx.doi.org/10.1111/j.1095-8649.2011.02943.x</a>","4":"Early marine migration of European silver eel <i>Anguilla anguilla</i> in northern Norway","StT":"Early marine migration of European silver eel <i>Anguilla anguilla</i> in northern Norway","5":"Davidsen, J.G.; Finstad, B.; Okland, F.; Thorstad, E.B.; Mo, T.A.; Rikardsen, A.H.","RSA":"Davidsen, J.G.; Finstad, B.; Okland, F.; Thorstad, E.B.; Mo, T.A.; Rikardsen, A.H.","6":"Gebaseerd op deze dataset","DutchTerm":"Gebaseerd op deze dataset","7":2011,"AnaDate":2011,"8":null,"MonDate":null,"9":". <i>J. Fish Biol. 78(5)</i>: 1390-1404. <a href=\"https://dx.doi.org/10.1111/j.1095-8649.2011.02943.x\" target=\"_blank\">https://dx.doi.org/10.1111/j.1095-8649.2011.02943.x</a>","":". <i>J. Fish Biol. 78(5)</i>: 1390-1404. <a href=\"https://dx.doi.org/10.1111/j.1095-8649.2011.02943.x\" target=\"_blank\">https://dx.doi.org/10.1111/j.1095-8649.2011.02943.x</a>","10":"https://dx.doi.org/10.1111/j.1095-8649.2011.02943.x","doi":"https://dx.doi.org/10.1111/j.1095-8649.2011.02943.x"}],"urls":[{"URL":"http://www.lifewatch.be/etn/","externalID":null,"URLTypeCode":null,"URLType":"Online dataset","URLTypID":19,"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}