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dc.contributor.authorStrøm, John Fredrik
dc.contributor.authorBjørn, Pål Arne
dc.contributor.authorBygdnes, Eirik Emil
dc.contributor.authorKristiansen, Lars
dc.contributor.authorSkjold, Bjørnar
dc.contributor.authorBøhn, Thomas
dc.date.accessioned2022-12-30T11:53:14Z
dc.date.available2022-12-30T11:53:14Z
dc.date.issued2022-06-24
dc.description.abstractSalmon lice can impact the marine behaviour, growth, and survival of salmonids, but little is known about their effects on Arctic char. We present behavioural responses from the first dose-response experiment with wild anadromous Arctic char (n = 50) infested in situ with salmon lice (0.0–1.2 lice g<sup>−1</sup> fish) in an area with low natural infestations. Infested fish spent less time at sea (mean ± SD = 22 ± 6 d) than non-infested fish (mean ± SD = 33 ± 5 d), and a significant dose response was evident, with even very low louse burdens (<0.05 lice g<sup>−1</sup> fish) reducing the marine feeding time. Furthermore, a negative correlation was present between time spent close to their native watercourse and parasite burden, suggesting that salmon lice influence the marine habitat use of Arctic char. No impact of salmon lice was evident on the return probability, i.e. marine survival. However, the presence of louse-induced mortality cannot be excluded as the modest sample size was only sufficient to detect extreme effects. Reduced marine feeding time and altered marine habitat use will likely have substantial negative effects on growth and fitness, suggesting that impacts of salmon lice must be considered in the conservation of anadromous Arctic char.en_US
dc.identifier.citationStrøm, Bjørn, Bygdnes, Kristiansen, Skjold, Bøhn. Behavioural responses of wild anadromous Arctic char experimentally infested in situ with salmon lice. ICES Journal of Marine Science. 2022;79(6):1853-1863en_US
dc.identifier.cristinIDFRIDAID 2094372
dc.identifier.doi10.1093/icesjms/fsac117
dc.identifier.issn1054-3139
dc.identifier.issn1095-9289
dc.identifier.urihttps://hdl.handle.net/10037/27958
dc.language.isoengen_US
dc.publisherOxford University Pressen_US
dc.relation.journalICES Journal of Marine Science
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2022 The Author(s)en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0en_US
dc.rightsAttribution 4.0 International (CC BY 4.0)en_US
dc.titleBehavioural responses of wild anadromous Arctic char experimentally infested in situ with salmon liceen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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Attribution 4.0 International (CC BY 4.0)
Except where otherwise noted, this item's license is described as Attribution 4.0 International (CC BY 4.0)