Atlantic Salmon Welfare: Sea Lice Prevention Through Integrated Management

Preventing sea lice infestations through integrated management approaches reduces welfare-compromising treatment events and improves chronic salmon welfare.

Key Facts

Sea lice prevention is more welfare-positive than repeated treatment cycles
Snorkel cages prevent young salmon from accessing surface waters where lice congregate
Deep light and feed placement keeps salmon below the depth where lice are most prevalent
Freshwater treatments kill lice and are less physiologically stressful than chemical bath treatments
Coordination between farms to synchronise treatment reduces reinfestation

Welfare Considerations

Salmon farms that rely on reactive treatment rather than prevention expose fish to repeated treatment events, each with associated welfare costs. Preventive approaches that reduce lice burden before treatment thresholds are reached spare fish from the acute stress of crowding and treatment. Snorkel and skirt technologies create physical barriers to lice. Deep-feeding strategies reduce surface exposure. These prevention measures, combined with coordinated area management, can reduce treatment frequency substantially. The welfare benefit accrues across millions of fish per farm per production cycle.

What You Can Do

Support salmon welfare standards that prioritise prevention over reactive treatment
Advocate for coordinated area management frameworks in salmon farming
Back Norwegian and Scottish regulatory requirements for lice prevention
Choose salmon from farms with documented integrated lice management
Encourage investment in snorkel and deep-light prevention technology