Helseovervåking hos vill laksefisk

Veterinærinstituttet overvåker forekomst og utbredelse av sykdomsagens hos vill laksefisk i ferskvannsfasen.

Helseovervåkingsprogrammet for vill anadrom laksefisk har som overordnet mål å undersøke kilder til og utbredelsen av sykdomsfremkallende agens i vill laksefisk. Veterinærinstituttet har ansvaret for ferskvannsfasen i programmet mens Havforskningsinstituttet har ansvaret for den marine fasen.

Rapport for overvåkingsdata fra 2019 rapporteres samtidig med Havforskningsinstituttet sin overvåking av vill laksefisk i sjø, og publiseres i løpet av juni 2020. 

2020

In 2020, the health monitoring programme expanded on the findings made in the 2016 and 2018 health monitoring programmes for wild anadromous salmonids [3, 4]. The overarching aim was to get a more complete picture of the occurrence of gill disease-associated infectious agents in wild salmonids in the sea, in rivers and in waterbodies that only house freshwater resident salmonids. The selected gill associated infectious agents are salmon gill poxvirus (SGPV), Atlantic salmon paramyxovirus (ASPV), Ca. Branchiomonas cysticola, Ca. Piscichlamydia salmonis, Desmozoon lepeophtherii and Paramoeba perurans.

The health of salmonids in the sea and in freshwater resident salmonids are important reference points in the investigation of disease interaction between wild and farmed salmonids.

This year the programme also investigated the presence of infectious agents in brown trout captured in large lakes, including the lakes Selbusjøen, Femunden and Snåsavatnet. Information about the fish health in these ecosystems is useful in risk assessments, but also as baseline information in the context of climate change and other man made sources of impact on fish communities.

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