Aquaculture Welfare

Farmed Salmon Lice Treatment Welfare

Sea lice treatments in salmon farming cause welfare impacts through temperature shock, mechanical damage, and chemical exposure. Minimizing treatment stress is essential.

Key Facts

Thermolicer treatments use warm water (34C) to kill lice but cause thermal stress
Hydrolicer uses pressurised seawater to remove lice - associated with scale loss
Chemical treatments (emamectin, azamethiphos) affect salmon physiology
Treatment frequency depends on lice burden relative to action thresholds
Welfare monitoring during and after treatment assesses recovery

Welfare Considerations

Sea lice treatments, while necessary for fish health, impose their own welfare costs. Fish subjected to repeated treatments experience cumulative stress, scale damage, and physiological disruption. Integrated lice management that uses biological control, genetics, and monitoring to minimize treatment frequency protects welfare both from lice burden and from treatment effects.

What You Can Do

Support salmon certification with treatment welfare monitoring requirements
Advocate for integrated lice management that minimizes chemical treatment frequency
Choose certified salmon from producers with documented lice management welfare protocols
Support research into less welfare-impactful lice treatment methods