Farmed Salmon Welfare and Emerging Technology Solutions

Atlantic salmon aquaculture faces serious welfare challenges, and new technologies are being developed to address sea lice, crowding stress, and slaughter practices.

Key Facts

Global Atlantic salmon aquaculture produces approximately 2.8 million tonnes annually
Sea lice infestations cost the industry over $1 billion annually and cause significant fish welfare harm
Thermal delousing (Thermolicer) treats lice but causes burns and stress when water temperature is not precisely controlled
Closed containment systems eliminate sea lice and reduce disease but have high capital costs
Controlled atmosphere stunning (CO2) remains common despite evidence that it causes distress before unconsciousness
Non-penetrating percussive stunning followed by immediate bleeding is considered best practice for welfare
Crowding stress during harvest operations can cause fin damage, scale loss, and elevated cortisol for hours

Welfare Considerations

Salmon aquaculture presents complex welfare challenges at enormous scale - billions of sentient fish. Evidence that fish experience pain and stress is now scientifically robust. Industry-wide adoption of better slaughter methods, lice management, and stocking density limits is achievable but requires regulatory pressure and consumer demand.

What You Can Do

Choose salmon certified by welfare-focused standards like the RSPCA Assured label
Ask retailers about slaughter method standards in their salmon supply chains
Support regulatory efforts to mandate humane slaughter in aquaculture
Reduce salmon consumption or choose land-based farmed species with better welfare records
Advocate for government funding of farmed fish welfare research