Aquatic Animal Welfare

Wild Salmon Parasite Management and Welfare

Wild salmon face increasing parasite pressure from sea lice originating from aquaculture sites, with welfare and population consequences for migratory fish.

Key Facts

Sea lice levels on wild post-smolt salmon are significantly higher near aquaculture sites
Heavy lice burdens cause lesions, secondary infection and reduced survival in wild fish
Norway has implemented traffic light regulatory systems to manage farm-wild lice interactions
Biological barriers and physical barriers between farms and wild salmon migration routes are proposed
The welfare of wild salmon from anthropogenic parasite pressure is an emerging policy issue

Welfare Considerations

Wild salmon experience genuine welfare harm from elevated sea lice pressure near aquaculture sites. Lice cause tissue damage, energy drain and secondary infections. Regulatory frameworks that consider wild fish welfare alongside farm productivity represent a welfare advance.

What You Can Do

Support aquaculture regulations that protect wild salmon migration corridors
Advocate for lice burden limits that account for wild fish welfare impacts
Choose certified salmon from operations with lowest environmental lice footprint