Aquaculture Welfare

Farmed Salmon Smolt Welfare at Transfer

The transfer of salmon smolts from freshwater to sea cages is a critical welfare event requiring careful management to minimise stress.

Key Facts

Smoltification involves complex physiological changes preparing salmon for seawater
Transfer timing matched to smoltification completion reduces stress significantly
Poor smolt quality at transfer leads to higher mortality and welfare problems
Crowding during smolt transport causes stress and injury
Water quality during transfer including temperature and oxygen affects welfare

Welfare Considerations

Smolt transfer is one of the most stressful events in farmed salmon's lives, combining physiological change with physical crowding and transport. Timing transfer correctly to match smoltification completion, maintaining appropriate crowding densities, and ensuring good water quality during transport are the key welfare management requirements for this critical production phase.

What You Can Do

Support aquaculture welfare standards specifying smolt transfer protocols
Advocate for smolt quality assessment requirements before transfer
Choose salmon from farms with transparent smolt welfare data