Aquaculture Antibiotic Use and Fish Welfare

Antibiotic use in aquaculture can both improve fish welfare by treating bacterial disease and threaten it through contribution to antimicrobial resistance.

Key Facts

Aquaculture accounts for significant global antibiotic use especially in Asia
Antibiotic use has declined dramatically in Norwegian salmon farming through vaccination
Bacterial diseases cause significant pain and welfare harm in aquaculture species
Resistance development threatens future ability to treat infections in fish
Biosecurity and vaccination can reduce antibiotic dependency substantially

Welfare Considerations

Antibiotic use in aquaculture presents a welfare paradox. Treating bacterial infections relieves pain and prevents death, benefiting fish welfare in the short term. But overuse and prophylactic use drive resistance development, threatening long-term ability to treat disease effectively. Intensive aquaculture systems create disease pressure that drives antibiotic reliance. Systems that invest in biosecurity, vaccination, and lower stocking densities reduce disease incidence and antibiotic need, achieving better welfare outcomes through prevention rather than treatment.

What You Can Do

Choose aquaculture products from systems with low antibiotic use records
Support certification schemes that track and require low antibiotic use
Advocate for transparent reporting of antibiotic use in aquaculture supply chains
Support research into aquaculture vaccines that reduce antibiotic dependency
Reduce aquaculture consumption or choose certified sustainable options