Aquaculture Disease and Welfare Trade-offs

Disease management in aquaculture creates complex welfare trade-offs between treatment interventions, biosecurity practices, and individual animal suffering from chronic infection.

Key Facts

Disease is the primary cause of mortality and welfare compromise in aquaculture globally.
Common aquaculture diseases include bacterial infections, viral hemorrhagic septicaemia, and parasites.
Antibiotic use in aquaculture contributes to antimicrobial resistance, a global public health concern.
Vaccination programmes have dramatically reduced antibiotic use in Norwegian salmon farming.
Disease outbreaks requiring mass culling cause acute welfare harm to millions of fish simultaneously.

Welfare Considerations

Disease management decisions in aquaculture balance the welfare of sick individuals against population-level control, antibiotic stewardship, and food safety. Preventive approaches including vaccination, improved genetics, and biosecurity protocols significantly reduce disease burden and the welfare harms of both chronic infection and mass culling. The Norwegian salmon industry demonstrates that near-zero antibiotic use is achievable through vaccination, representing a major welfare and public health advance. Similar approaches should be pursued across aquaculture species.

What You Can Do

Choose seafood from aquaculture operations with documented low antibiotic use and vaccination programmes.
Ask retailers whether salmon and other aquaculture products come from vaccinated stock.
Support regulatory frameworks requiring biosecurity planning and disease management protocols.
Advocate for research investment in vaccination development for key aquaculture species.
Reduce farmed fish consumption to lower overall pressure on disease-prone intensive systems.