Aquaculture

Farmed Salmon Gill Health Welfare

Gill disease is a major welfare and production problem in farmed salmon, causing labored breathing, reduced growth, and significant mortality.

Key Facts

Amoebic gill disease causes significant mortality in Atlantic salmon farming
Freshwater bath treatments temporarily remove amoeba but stress fish significantly
Poor water quality and jellyfish contact contribute to gill damage
Gill health monitoring through gross and histological scoring tracks farm welfare

Welfare Considerations

Gill disease causes labored breathing and progressive organ failure in affected salmon. Fish with significant gill damage experience hypoxia and reduced energy availability. Treatment itself causes additional welfare stress. Preventative management through water quality and reduced crowding is more welfare-compatible.

What You Can Do

Support salmon from farms with documented gill health monitoring
Advocate for gill health standards in aquaculture welfare certification
Back research into preventative gill health management strategies
Reduce salmon consumption or choose certified products from low-disease operations