Aquaculture Disease Management and Fish Welfare

Disease management in aquaculture is a critical welfare issue, with prevention through good husbandry far preferable to treatment of established infections in farmed fish.

Key Facts

Disease is responsible for an estimated 10-40% of production losses in global aquaculture annually
Amoebic gill disease, bacterial kidney disease and various viral conditions affect major farmed species
High stocking densities are a primary risk factor for disease transmission and immune suppression in fish
Antibiotic overuse in aquaculture contributes to antimicrobial resistance with implications for human health
Biosecurity protocols including fallowing, disinfection and stock monitoring significantly reduce disease burden
Vaccination against bacterial diseases has dramatically reduced antibiotic use in Norwegian salmon farming

Welfare Considerations

Disease in farmed fish causes significant welfare harm through pain, functional impairment and altered behaviour. Beyond individual suffering, disease outbreaks lead to mass mortalities and emergency treatments that are themselves welfare-compromising. Prevention through robust biosecurity, appropriate stocking densities and vaccination where available is both ethically and economically superior to reactive treatment. Reducing antibiotic dependency through preventive management is also an important animal and human health goal.

What You Can Do

Support aquaculture certification schemes that require robust biosecurity and disease management standards
Advocate for mandatory stocking density limits that reduce disease risk in farmed fish
Encourage retailers to source from farms demonstrating low antibiotic use and high biosecurity
Support research into fish vaccines and disease-resistant breeding as alternatives to antibiotics
Ask seafood producers about their disease management approaches and antibiotic use data