Cristin-resultat-ID: 1474210
Sist endret: 19. februar 2018 21:38
NVI-rapporteringsår: 2017
Resultat
Vitenskapelig artikkel
2017

Salmon lice infestations on sea trout predicts infestations on migrating salmon post-smolts

Bidragsytere:
  • Knut Wiik Vollset
  • Elina Halttunen
  • Bengt Finstad
  • Ørjan Karlsen
  • Pål Arne Bjørn og
  • Ian Dohoo

Tidsskrift

ICES Journal of Marine Science
ISSN 1054-3139
e-ISSN 1095-9289
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2017
Publisert online: 2017
Volum: 74
Hefte: 9
Sider: 2354 - 2363

Importkilder

Scopus-ID: 2-s2.0-85039849038

Klassifisering

Vitenskapsdisipliner

Marinbiologi

Emneord

Akvakultur • Fiskeoppdrett • Parasitter • Bevaringsbiologi

Finansiering

  • Andre
    Prosjektkode: HAVFORSKNINGSINSTITUTTET
  • Andre
    Prosjektkode: NORWEGIAN ENVIRONMENT AGENCY
  • Andre
    Prosjektkode: NORWEGIAN FOOD SAFETY AUTHORITY
  • Egen institusjon
    Prosjektkode: HAVFORSKNINGSINSTITUTTET
  • Egen institusjon
    Prosjektkode: NORWEGIAN INSTITUTE FOR NATURE RESEARCH
  • Norges forskningsråd
    Prosjektkode: 243912

Beskrivelse Beskrivelse

Tittel

Salmon lice infestations on sea trout predicts infestations on migrating salmon post-smolts

Sammendrag

Impacts of sea lice (Lepeophtheirus salmonis or Caligus spp.) on wild salmonids is currently one of the most important issues facing management of fish farms in salmon producing countries in the northern hemisphere. Surveillance of sea lice on wild Atlantic salmon (Salmo salar)is often hampered by the ability to catch enough migrating post-smolts. Therefore, sea lice abundance on anadromous trout (Salmo trutta) is often used to infer sea lice abundance on migrating salmon post-smolt. However, the assumption that there is a relationship between the abundance of lice on salmon and trout has never been tested. Here we use a dataset of sea lice on salmon post-smolt and sea trout that have been caught simultaneously in trawl hauls, to evaluate the correlation in abundance of sea lice between the two species using various statistical models. We demonstrate that trout generally has higher abundances of sea lice than salmon. Average lice per gram fish on sea trout(log transformed) predicted the abundance of lice on salmon best. Negative binomial models of lice counts were preferable to using trout lice counts as direct estimates of salmon lice abundance, and they had better predictive ability than logit models of high (vs. low) lice counts. Including the size of the salmon increased the predictive ability of the model, but these data are not generally available. The effect of salmon weight may have been a direct effect of body size, or an indirect effect of time spent in marine waters. Finally, we predict lower salmon lice counts on migrating salmon with our selected binomial model than with the current method of using trout lice counts as a direct estimator on salmon lice counts, and demonstrate that management advice would change considerably depending on the chosen method. Keywords: aquaculture, conservation, fish farming, Lepeophtheirus salmonis, management, parasite, salmonids, salmon lice, Salmo salar.

Bidragsytere

Knut Vollset

Bidragsyterens navn vises på dette resultatet som Knut Wiik Vollset
  • Tilknyttet:
    Forfatter
    ved NORCE Miljø ved NORCE Norwegian Research Centre AS

Elina Halttunen

  • Tilknyttet:
    Forfatter
    ved Sykdom og smittespredning ved Havforskningsinstituttet

Bengt Finstad

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

Ørjan Karlsen

  • Tilknyttet:
    Forfatter
    ved Reproduksjon og utvikl.biologi ved Havforskningsinstituttet

Pål Arne Bjørn

  • Tilknyttet:
    Forfatter
    ved Sykdom og smittespredning ved Havforskningsinstituttet
1 - 5 av 6 | Neste | Siste »