Cristin-resultat-ID: 1330749
Sist endret: 30. september 2016 14:25
NVI-rapporteringsår: 2015
Resultat
Vitenskapelig artikkel
2016

Impacts of parasites on marine survival of Atlantic salmon: a meta-analysis

Bidragsytere:
  • Knut Wiik Vollset
  • Randi Ingebjørg Krontveit
  • Peder A Jansen
  • Bengt Finstad
  • Bjørn Torgeir Barlaup
  • Ove Tommy Skilbrei
  • mfl.

Tidsskrift

Fish and Fisheries
ISSN 1467-2960
e-ISSN 1467-2979
NVI-nivå 2

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2016
Publisert online: 2015
Trykket: 2016
Volum: 17
Hefte: 3
Sider: 714 - 730
Open Access

Importkilder

Scopus-ID: 2-s2.0-84952837670

Finansiering

  • Norges forskningsråd
    Prosjektkode: 243912

Beskrivelse Beskrivelse

Tittel

Impacts of parasites on marine survival of Atlantic salmon: a meta-analysis

Sammendrag

Parasites can, in theory, have large impacts on the survival of fish populations. One method to evaluate such impacts on anadromous species is to apply manipulative field experiments in which parallel groups of antiparasitically treated and non-treated fish are simultaneously released and then subsequently recaptured as returning adults. A systematic review and meta-analysis on all such Norwegian studies on Salmo salar provided a data set for the time period 1996 to 2011 on 118 release groups comprising 657 624 fish released and 3989 recaptured. The overall risk ratio (RR) was estimated to be 1.18 (95% CI: 1.07–1.30). The effect varied strongly between groups, (Higgins I2 = 40.1%). Over 70% of this heterogeneity could be explained by the release location, time period and baseline survival. The most important predictor variable was baseline survival. In groups with low recapture in the control group (low baseline survival), the effect of treatment was high (RR = 1.7), while in groups with high recapture in the control group (high baseline survival), there was no effect of treatment (RR ~ 1.00). The most prevalent parasite in the region affected by the drugs administered was Lepeophtheirus salmonis. Hence, the meta-analysis supports the hypothesis that L. salmonis contributes to the mortality of S. salar during outward migration. However, the effect of treatment was not consistent, but was evidently strongly modulated by other risk factors. The results suggest that the population-level effects of parasites cannot be estimated independently of other factors affecting the marine survival of S. salar. Emamectin benzoate, fish farming, Lepeophtheirus salmonis, parasite, salmon louse, substance EX

Bidragsytere

Knut Vollset

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

Randi Ingebjørg Krontveit

  • Tilknyttet:
    Forfatter
    ved Statens legemiddelverk

Peder Andreas Jansen

Bidragsyterens navn vises på dette resultatet som Peder A Jansen
  • Tilknyttet:
    Forfatter
    ved Epidemiologi ved Veterinærinstituttet

Bengt Finstad

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

Bjørn Torgeir Barlaup

  • Tilknyttet:
    Forfatter
    ved NORCE Miljø ved NORCE Norwegian Research Centre AS
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