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dc.contributor.authorHalttunen, Elina
dc.contributor.authorGjelland, Karl Øystein
dc.contributor.authorGlover, Kevin
dc.contributor.authorJohnsen, Ingrid Askeland
dc.contributor.authorSerra-Llinares, Rosa-Maria
dc.contributor.authorSkaala, Øystein
dc.contributor.authorNilsen, Rune
dc.contributor.authorBjørn, Pål Arne
dc.contributor.authorKarlsen, Ørjan
dc.contributor.authorFinstad, Bengt
dc.contributor.authorSkilbrei, Ove Tommy
dc.coverage.spatialWestern Norwaynb_NO
dc.identifier.citationMarine Ecology Progress Series. 2018, 592 243-256.nb_NO
dc.description.abstractUnderstanding Atlantic salmon Salmo salar post-smolt coastal migration behaviour is crucial for predicting their exposure to ecological challenges such as the parasite salmon louse Lepeophtheirus salmonis. We compared the migration of acoustically tagged, hatchery-reared Atlantic salmon post-smolts of wild and domesticated origins from the inner, middle and outer part of a 172 km long aquaculture-intensive fjord in western Norway. Additionally, we examined if the timing of the release or treatment with an anti-parasitic drug (prophylaxis) altered migratory behaviour. We found no significant differences in mean progression rates among the 3 release locations, among genetic groups or between treatments (range: 11.5−16.9 km d−1). However, individual variation in progression rates and migratory routes resulted in large differences in fjord residence times (range: 2−39 d). Ocean-current directions during and after release affected swimming speed, progression rate and route choice, and for most post-smolts, swimming speeds were much higher than their progression rates out of the fjord. The predicted lice loads based on lice intensity growth rates on smolts held in sentinel cages throughout the fjord indicated that individuals taking >10 d to exit the fjord in periods with high infestation pressure are likely to get lethally high sea-lice infestations. We conclude that, as migratory routes of S. salar post-smolts are hard to predict and migration times can stretch up to over a month, it is important to develop aquaculture management that keeps salmon lice levels down along all potential migration routes and during the full potential migratory period. Migratory behaviour · Salmo salar · Lepeophtheirus salmonis · Acoustic telemetry · Management · Fish farming · Parasitenb_NO
dc.description.abstractMigratory behaviournb_NO
dc.rightsNavngivelse 4.0 Internasjonal*
dc.subjectMigratory behaviournb_NO
dc.subjectSalmo salarnb_NO
dc.subjectLepeophtheirus salmonisnb_NO
dc.subjectAcoustic telemetrynb_NO
dc.subjectManagement ·nb_NO
dc.subjectFish farmingnb_NO
dc.titleMigration of Atlantic salmon post-smolts in a fjord with high infestation pressure of salmon licenb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.subject.nsiVDP::Zoologiske og botaniske fag: 480nb_NO
dc.subject.nsiVDP::Zoology and botany: 480nb_NO
dc.source.journalMarine Ecology Progress Seriesnb_NO
dc.relation.projectNorges forskningsråd: 221404nb_NO
cristin.unitnameAvdeling for akvatisk økologi

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Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal