Farmed Atlantic Salmon Genetics and Welfare

How selective breeding in salmon aquaculture affects welfare and what genetic approaches improve outcomes.

Key Facts

Selective breeding has increased farmed salmon growth rate dramatically while also changing behavior and disease resistance
Some genetic selection has inadvertently reduced stress tolerance and increased aggression in farmed populations
Breeding programs can select simultaneously for growth, disease resistance, and welfare-relevant behavioral traits
Genomic selection allows faster progress on multiple traits simultaneously including welfare indicators
Domesticated salmon differ significantly from wild salmon in behavior, making welfare assessment complex
Norwegian salmon breeding programs are beginning to incorporate welfare traits including calmness as selection criteria

Welfare Considerations

Salmon genetics and welfare intersect in ways that offer both challenges and opportunities. The same genomic tools used to select for rapid growth can be applied to select for calmer temperaments, better disease resistance, and improved stress tolerance. The challenge is that welfare traits are harder to measure at the scale needed for selection programs than growth and feed conversion. Integrating welfare genomics into breeding programs requires investment in behavioral measurement technology and industry willingness to include welfare alongside production traits as breeding objectives.

What You Can Do

Support salmon breeding research that incorporates welfare traits alongside production traits
Choose salmon from operations with transparent genetics programs addressing disease resistance and welfare
Advocate for industry adoption of welfare trait inclusion in national aquaculture breeding objectives
Support research into genomic markers for welfare-relevant traits in farmed salmonids