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dc.contributor.authorThorstad, Eva
dc.contributor.authorTodd, Christopher David
dc.contributor.authorUglem, Ingebrigt
dc.contributor.authorBjorn, Paal Arne
dc.contributor.authorGargan, Patrick
dc.contributor.authorVollset, Knut
dc.contributor.authorHalttunen, Elina
dc.contributor.authorKalas, Steinar
dc.contributor.authorBerg, Marius
dc.contributor.authorFinstad, Bengt
dc.identifier.citationThorstad , E , Todd , C D , Uglem , I , Bjorn , P A , Gargan , P , Vollset , K , Halttunen , E , Kalas , S , Berg , M & Finstad , B 2015 , ' Effects of salmon lice Lepeophtheirus salmonis on wild sea trout Salmo trutta – a literature review ' , Aquaculture Environment Interactions , vol. 7 , no. 2 , pp. 91-113 .
dc.identifier.otherPURE: 211243240
dc.identifier.otherPURE UUID: c58e4a4d-55ec-4379-ae28-2e1a8bacaf9e
dc.identifier.otherScopus: 84944406883
dc.identifier.otherWOS: 000362667800001
dc.descriptionThe project was funded by The Norwegian Seafood Research Fund (FHF, project number 900950.en
dc.description.abstractSalmon farming increases the abundance of salmon lice, which are ectoparasites of salmonids in the sea. Here we review the current knowledge on the effects of salmon lice on wild sea trout. Salmon lice feed on host mucus, skin and muscle, and infestation may induce osmoregulatory dysfunction, physiological stress, anaemia, reduced feeding and growth, increased susceptibility to secondary infections, reduced disease resistance and ultimately mortality of individual sea trout. Wild sea trout in farm-free areas generally show low lice levels. In farm-intensive areas, lice levels on wild sea trout are typically higher, and more variable than in farm-free areas. Lice on wild sea trout are found at elevated levels particularly within 30 km of the nearest farms but can also extend to further ranges. Salmon lice in intensively farmed areas have negatively impacted wild sea trout populations by reducing growth and increasing marine mortality. Quantification of these impacts remains a challenge, although population-level effects have been quantified in Atlantic salmon by comparing the survival of chemically protected fish with control groups, which are relevant also for sea trout. Mortality attributable to salmon lice can lead to an average of 12−29% fewer salmon spawners. Reduced growth and increased mortality will reduce the benefits of marine migration for sea trout, and may also result in selection against anadromy in areas with high lice levels. Salmon lice-induced effects on sea trout populations may also extend to altered genetic composition and reduced diversity, and possibly to the local loss of sea trout, and establishment of exclusively freshwater resident populations.
dc.relation.ispartofAquaculture Environment Interactionsen
dc.rights© The authors 2015. Open Access under Creative Commons by Attribution Licence. Use, distribution and reproduction are unrestricted. Authors and original publication must be credited.en
dc.subjectSalmon liceen
dc.subjectLepeophtheirus salmonisen
dc.subjectSea trouten
dc.subjectSalmo truttaen
dc.subjectSalmon farmingen
dc.subjectQH301 Biologyen
dc.titleEffects of salmon lice Lepeophtheirus salmonis on wild sea trout Salmo trutta – a literature reviewen
dc.typeJournal itemen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.School of Biologyen
dc.contributor.institutionUniversity of St Andrews.Marine Alliance for Science & Technology Scotlanden
dc.contributor.institutionUniversity of St Andrews.Scottish Oceans Instituteen
dc.description.statusPeer revieweden

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