Disease Management and Fish Welfare in Aquaculture

Disease management in aquaculture involves balancing treatment efficacy with the welfare costs of both disease and treatment in farmed fish.

Key Facts

Infectious salmon anaemia (ISA) and pancreatic disease (PD) are major welfare challenges in salmon farming
Mass treatment with in-feed antibiotics prevents individual animal welfare assessment
Vaccination programmes have significantly reduced antibiotic use in Norwegian salmon farming
Bath treatments cause acute stress from crowding and chemical exposure
Early detection through surveillance enables timely treatment reducing duration of disease welfare harm

Welfare Considerations

Disease outbreaks in aquaculture cause welfare harm both from the disease itself and from treatment protocols. Mass medication approaches treat population averages rather than individual welfare needs. In-feed medication may not reach fish whose appetite is suppressed by disease. Bath treatments involving crowding and chemical exposure cause additional acute stress. Vaccination programmes that prevent disease entirely represent the optimal welfare intervention. Early disease surveillance enabling targeted treatment of emerging outbreaks reduces both disease duration and treatment exposure welfare costs.

What You Can Do

Support aquaculture certification requiring disease prevention over treatment approaches
Advocate for welfare assessment during disease treatment in aquaculture operations
Choose certified sustainable seafood from producers with robust disease prevention programmes
Support research into vaccine development for key aquaculture disease pathogens