Atlantic Cod Welfare in Aquaculture: Challenges and Opportunities

Atlantic cod aquaculture has been developed in Norway and Iceland with welfare challenges relating to the species complex behaviour and sensitivity to handling.

Key Facts

Norwegian cod aquaculture peaked in the 2000s but declined due to economic and technical challenges
The species shows complex schooling, shoaling, and aggressive feeding competition in culture systems
Cod are sensitive to sea lice and share parasites with wild salmon in coastal cage systems
The species shows strong stress responses to handling with prolonged cortisol recovery periods
Attempts to revive cod aquaculture continue with recirculating aquaculture systems being explored

Welfare Considerations

Atlantic cod welfare in aquaculture has several dimensions. The species aggressive feeding competition in groups creates social stress and injury in poorly managed systems. Sea lice infestations cause welfare harm equivalent to that seen in salmon. Cod that escape from sea cages pose ecological risks through competition and genetic introgression with wild populations. Handling stress during routine operations causes prolonged physiological recovery. The economic failure of cod aquaculture has meant welfare investment has been limited. Recirculating aquaculture system development for cod offers the possibility of more stable, controllable welfare conditions and reduced sea lice exposure, but requires significant technical development.

What You Can Do

Support development of welfare standards for cod aquaculture alongside any commercial expansion
Advocate for welfare science to be integrated into new cod aquaculture technology development
Engage with wild cod conservation that reduces pressure on wild stocks and reduces incentive for poorly managed aquaculture