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dc.contributor.authorHalttunen, Elina
dc.contributor.authorGjelland, Karl Øystein
dc.contributor.authorHamel, Sandra
dc.contributor.authorSerra-Llinares, Rosa Maria
dc.contributor.authorNilsen, Rune
dc.contributor.authorArechavala-Lopez, Pablo
dc.contributor.authorSkardhamar, Jofrid
dc.contributor.authorJohnsen, Ingrid Askeland
dc.contributor.authorAsplin, Lars
dc.contributor.authorKarlsen, Ørjan
dc.contributor.authorBjørn, Pål Arne
dc.contributor.authorFinstad, Bengt
dc.date.accessioned2018-01-12T14:21:46Z
dc.date.available2018-01-12T14:21:46Z
dc.date.created2018-01-10T11:27:21Z
dc.date.issued2017
dc.identifier.citationJournal of Fish Diseases. 2017, 1-15.
dc.identifier.issn0140-7775
dc.identifier.urihttp://hdl.handle.net/11250/2477307
dc.description.abstractSea trout face growth – mortality trade-offs when entering the sea to feed. Salmon lice epizootics resulting from aquaculture have shifted these trade-offs, as salmon lice might both increase mortality and reduce growth of sea trout. We studied mortality and beha- vioural adaptations of wild sea trout in a large-scale experiment with acoustic telemetry in an aquaculture intensive area that was fallowed (emptied of fish) synchronically bian- nually, creating large variations in salmon lice concentrations. We tagged 310 wild sea trout during 3 years, and gave half of the individuals a prophylaxis against further sal- mon lice infestation. There was no difference in survival among years or between treat- ments. In years of high infestation pressure, however, sea trout remained closer to the river outlet, used freshwater (FW) habitats for longer periods and returned earlier to the river than in the low infestation year. This indicates that sea trout adapt their migratory behaviour by actively choosing FW refuges from salmon lice to escape from immediate mortality risk. Nevertheless, simulations show that these adaptations can lead to lost growth opportunities. Reduced growth can increase long-term mortality of sea trout due to prolonged exposure to size-dependent predation risk, lead to lower fecundity and, ultimately, reduce the likelihood of sea migration
dc.language.isoeng
dc.titleSea trout adapt their migratory behaviour in response to high salmon lice concentrations
dc.typePeer reviewed
dc.typeJournal article
dc.description.versionpublishedVersion
dc.source.pagenumber1-15
dc.source.journalJournal of Fish Diseases
dc.identifier.doi10.1111/jfd.12749
dc.identifier.cristin1539635
dc.relation.projectNorges forskningsråd: 221404
dc.relation.projectHavforskningsinstituttet: Prosjektfinansiering
dc.relation.projectNorsk institutt for naturforskning: Prosjektfinansiering
cristin.unitcode7431,17,0,0
cristin.unitcode7431,0,0,0
cristin.unitcode7431,20,0,0
cristin.unitcode7431,24,0,0
cristin.unitnameSykdom og smittespredning
cristin.unitnameHavforskningsinstituttet
cristin.unitnameOseanografi og klima
cristin.unitnameReproduksjon og utvikl.biologi
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode2


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