Aquaculture

Farmed Salmon Welfare at Harvest: Electrical Stunning Systems

Electrical stunning systems for salmon at harvest represent a significant welfare improvement over CO2 and percussive methods.

Key Facts

Electrical stunning causes immediate insensibility in salmon when properly applied
System design including water conductivity and current parameters affects stunning efficacy
Norway's REMA 1000 retailer requires electrical stunning as a purchasing condition
Stunner calibration and maintenance are essential for consistent welfare performance

Welfare Considerations

When electrical stunning is correctly implemented, salmon lose consciousness immediately and painlessly before slaughter. Consumer and retailer pressure for verified stunning methods has been more effective than regulation in driving adoption. Certification of stunning efficacy is the next welfare priority.

What You Can Do

Choose salmon certified under schemes requiring electrical stunning at harvest
Support aquaculture welfare organisations campaigning for effective stunning
Advocate for mandatory pre-slaughter stunning for farmed fish in national legislation