Cristin-resultat-ID: 1260480
Sist endret: 31. oktober 2017 15:02
NVI-rapporteringsår: 2015
Resultat
Vitenskapelig oversiktsartikkel/review
2015

Effects of salmon lice Lepeophtheirus salmonis on wild sea trout Salmo trutta—a literature review

Bidragsytere:
  • Eva Bonsak Thorstad
  • Christopher D. Todd
  • Ingebrigt Uglem
  • Pål Arne Bjørn
  • Patrick G. Gargan
  • Knut Wiik Vollset
  • mfl.

Tidsskrift

Aquaculture Environment Interactions
ISSN 1869-215X
e-ISSN 1869-7534
NVI-nivå 1

Om resultatet

Vitenskapelig oversiktsartikkel/review
Publiseringsår: 2015
Publisert online: 2015
Volum: 7
Hefte: 2
Sider: 91 - 113
Open Access

Importkilder

Scopus-ID: 2-s2.0-84944406883

Finansiering

  • Fiskeri- og havbruksnæringens forskningsfinansiering
    Prosjektkode: 900950
  • Norges forskningsråd
    Prosjektkode: 243912

Beskrivelse Beskrivelse

Tittel

Effects of salmon lice Lepeophtheirus salmonis on wild sea trout Salmo trutta—a literature review

Sammendrag

Salmon 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. Salmon lice · Lepeophtheirus salmonis · Sea trout · Salmo trutta · Parasite · Aquaculture · Salmon farming

Bidragsytere

Eva Bonsak Thorstad

  • Tilknyttet:
    Forfatter
    ved NINA laksefisk ved Norsk institutt for naturforskning

Christopher D. Todd

  • Tilknyttet:
    Forfatter
    ved University of St. Andrews

Ingebrigt Uglem

  • Tilknyttet:
    Forfatter
    ved NINA laksefisk ved Norsk institutt for naturforskning

Pål Arne Bjørn

  • Tilknyttet:
    Forfatter
    ved Sykdom og smittespredning ved Havforskningsinstituttet

Patrick G. Gargan

  • Tilknyttet:
    Forfatter
    ved Irland
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