Vis enkel innførsel

dc.contributor.authorGjelland, Karl Øystein
dc.contributor.authorSerra-Llinares, Rosa Maria
dc.contributor.authorHedger, Richard David
dc.contributor.authorArechavala-Lopez, Pablo
dc.contributor.authorNilsen, Rune
dc.contributor.authorFinstad, Bengt
dc.contributor.authorUglem, Ingebrigt
dc.contributor.authorSkilbrei, Ove
dc.contributor.authorBjørn, Pål Arne
dc.date.accessioned2014-07-17T09:32:51Z
dc.date.available2014-07-17T09:32:51Z
dc.date.issued2014-07-09
dc.identifier.citationGjelland KØ, Serra-Llinares RM, Hedger RD, Arechavala-Lopez P and others (2014) Effects of salmon lice infection on the behaviour of sea trout in the marine phase. Aquacult Environ Interact 5:221-233nb_NO
dc.identifier.issn1869-215X
dc.identifier.issn1869-7534
dc.identifier.urihttp://hdl.handle.net/11250/197590
dc.description.abstractSalmon lice Lepeophtheirus salmonis Krøyer may affect survival and growth of anadromous salmonids through physiological stress and/or behavioural changes. Using acoustic telemetry tracking, we investigated the behaviour of 30 infected sea trout Salmo trutta throughout the summer in a fjord with very high salmon lice infection pressure. Most of the tracked sea trout adopted a movement pattern expected to suppress salmon lice infestation, as they showed a strong preference for fresh or brackish water, spending most of the time close to a river outlet or even migrating into the river. Highly infested sea trout preferred shallower depths, associated with lower salinity. The fish lost to predation stayed further away from the river outlet than non-predated fish, and were likely subjected to a stronger infection pressure. Half of the tracked group were treated with a salmon lice prophylaxis, emamectin benzoate. The effect of treatment on infestation was monitored in a separate group held in a sea cage and found to be moderate; the mortality in this group was associated with infestation by motile lice stages. In contrast, treatment was not found to have an effect on tracked fish behaviour. It is likely that some physiological and behavioural responses to high salmon lice infection pressure may be present even after a prophylaxis treatment, in particular when the treatment is given after exposure to salmon lice infection. We conclude that increased salmon lice infection pressure associated with altered salmon farming practice may have the potential to influence the marine behaviour and growth of sea trout.nb_NO
dc.language.isoengnb_NO
dc.publisherInter-Researchnb_NO
dc.subjectVDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920::Fiskehelse: 923nb_NO
dc.titleEffects of salmon lice infection on the behaviour of sea trout in the marine phasenb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.source.pagenumber221-233nb_NO
dc.source.volume5nb_NO
dc.source.journalAquaculture Environment Interactionsnb_NO
dc.source.issue3nb_NO
dc.identifier.doi10.3354/aei00105


Tilhørende fil(er)

Thumbnail

Denne innførselen finnes i følgende samling(er)

Vis enkel innførsel