Farmed Salmon Life Cycle Welfare: From Egg to Harvest

Salmon welfare challenges exist at every stage of the production cycle, from hatchery conditions through sea cage rearing to slaughter, requiring a whole-lifecycle approach.

Key Facts

Atlantic salmon farming involves multiple life stages: egg incubation, freshwater rearing, smoltification, sea pen growing, and slaughter
Smoltification — the physiological transition from freshwater to marine life — is a sensitive welfare period
Crowding stress, sea lice, and gill disease are the primary welfare concerns in sea cage systems
Mortality rates in Norwegian salmon farming average around 15-20% annually
Welfare at slaughter has improved with electrical stunning adoption, but implementation is inconsistent

Welfare Considerations

Farmed salmon experience a complex series of welfare challenges across their two to three year production cycle. Hatchery conditions determine early developmental health. The smoltification transition is physiologically demanding and poorly managed conditions at this stage can create lasting welfare compromise. Sea pen growing involves crowding, sea lice infestation risk, and susceptibility to disease and harmful algal blooms. Mortality rates significantly above zero indicate populations experiencing ongoing welfare harm. At slaughter, the shift towards electrical stunning represents progress but quality of implementation varies. A whole-lifecycle welfare lens — assessing and improving conditions at every stage — is more effective than addressing individual stages in isolation.

What You Can Do

Support salmon certification schemes that apply welfare criteria across the full lifecycle
Advocate for mandatory mortality reporting and public benchmarking in salmon farming
Choose salmon from operations with demonstrated low lice burdens and high stunning compliance
Support research into improved smolt welfare protocols and sea lice prevention
Engage with supermarkets to require lifecycle welfare standards from salmon suppliers