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dc.contributor.authorLennox, Robert J.
dc.contributor.authorØkland, Finn
dc.contributor.authorMitamura, Hiromichi
dc.contributor.authorCooke, Steven J.
dc.contributor.authorThorstad, Eva Bonsak
dc.coverage.spatialRiver Opo, river Imsa, Hardangerfjord, Norway, Europenb_NO
dc.date.accessioned2019-01-14T13:40:16Z
dc.date.available2019-01-14T13:40:16Z
dc.date.created2018-12-18T14:50:25Z
dc.date.issued2018
dc.identifier.citationICES Journal of Marine Science. 2018, 75 (6), 1984-1991.nb_NO
dc.identifier.issn1054-3139
dc.identifier.urihttp://hdl.handle.net/11250/2580531
dc.description.abstractThere are substantial benefits to potential fitness conferred to animals that undertake migrations. However, animals must make compromises to maximize survival and compensate for the risks associated with long-distance movement. European eel (Anguilla anguilla), a migratory catadromous fish, has undergone population declines owing to changes in marine and freshwater habitat and interactions with human infrastructure, instigating research to investigate the mechanisms controlling their migration. Yellow-phase European eels from the local River Opo and silver-phase European eels transplanted from River Imsa, Norway, were implanted with acoustic transmitters and released within a network of receiver stations in the Hardangerfjord, Norway. Silver-phase eels exhibited more movement within the array than yellow-phase eels, signifying the onset of migration. Silver-phase eels moved through the fjord nocturnally, arriving at gates predominantly at night. Eels had slower rates of migration than expected based on models predicting continuous movement, suggesting that movement ceased during daylight hours. Reduced net rates of travel supported the hypothesis that eels compromise speed for safety during the early marine migration by avoiding predators and not actively migrating during daylight. The silver eels were capable of directed movement towards the ocean and were not recorded by receivers in bays or dead ends. European eels must successfully transit this coastal zone, where their residence is prolonged because of the relatively slow speeds. These results suggest that the early marine phase of the European eel spawning migration be a focal period for European eel conservation efforts. asset protection principle, conservation behaviour, exploitation, fjord, telemetrynb_NO
dc.language.isoengnb_NO
dc.subjectasset protection principlenb_NO
dc.subjectconservation behaviournb_NO
dc.subjectexploitationnb_NO
dc.subjectfjordnb_NO
dc.subjecttelemetrynb_NO
dc.titleEuropean eel Anguilla anguilla compromise speed for safety in the early marine spawning migrationnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.rights.holder© International Council for the Exploration of the Sea 2018. All rights reserved.nb_NO
dc.subject.nsiVDP::Zoologiske og botaniske fag: 480nb_NO
dc.subject.nsiVDP::Zoology and botany: 480nb_NO
dc.source.pagenumber1984-1991nb_NO
dc.source.volume75nb_NO
dc.source.journalICES Journal of Marine Sciencenb_NO
dc.source.issue6nb_NO
dc.identifier.doi10.1093/icesjms/fsy104
dc.identifier.cristin1645051
dc.relation.projectAndre: Natural Sciences and Engineering Research Council of Canadanb_NO
cristin.unitcode7511,3,0,0
cristin.unitnameAvdeling for akvatisk økologi
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode1


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