Farm Animal Welfare

Farmed Salmon Smolt Welfare Production

Welfare challenges in the production of Atlantic salmon smolts in freshwater hatcheries before transfer to sea cages.

Key Facts

Smolt production involves crowding, grading, vaccination, and transport
Smoltification is a physiologically stressful period requiring careful management
Photoperiod manipulation to accelerate smoltification affects stress physiology
Grading by size causes acute stress and potential injury
Water temperature and oxygen management are critical welfare variables in smolt production

Welfare Considerations

Smolt production is a welfare-intensive phase of Atlantic salmon aquaculture. The physiological transformation from freshwater to marine life requires careful environmental management, and the handling events associated with vaccination, grading, and transport create cumulative stress. Welfare improvements in smolt production have downstream benefits for sea cage performance and welfare.

What You Can Do

Ask about smolt welfare standards when purchasing salmon
Support research into lower-stress vaccination and grading methods for salmon smolts
Advocate for smolt welfare to be included in salmon aquaculture certification standards