Aquaculture

Farmed Salmon Disease Challenge Testing: Welfare in Research

Disease challenge experiments used to develop vaccines and treatments raise welfare concerns that require ethical oversight and 3Rs application.

Key Facts

Sea lice and bacterial disease challenge studies are essential for vaccine and treatment development
Challenge experiments cause disease in test fish - welfare costs must be justified by scientific benefit
Humane endpoints - defined signs at which fish are euthanised - reduce duration of suffering
In vitro alternatives reduce but cannot completely replace challenge testing in fish welfare research

Welfare Considerations

Disease challenge experiments cause intentional welfare harm to research fish. Ethical justification requires that benefit outweighs cost, that animal numbers are minimised, and that humane endpoints limit the duration of suffering. Regulatory oversight of fish welfare research is improving but still lags mammalian research.

What You Can Do

Support 3Rs organisations promoting alternatives to live animal challenge testing in fish
Advocate for mandatory ethical review of fish disease research using challenge models
Choose salmon producers who invest in welfare-aware vaccine development