Aquaculture Recirculating Systems - Welfare Comparison

Comparing welfare outcomes in recirculating aquaculture systems (RAS) versus sea cage production for Atlantic salmon.

Key Facts

RAS technology recycles 95-99% of water, enabling land-based fish production with controlled conditions
Water quality control in RAS allows optimisation of temperature, oxygen, and CO2 reducing chronic stress
RAS fish show lower sea lice burdens but face challenges including gas supersaturation and handling stress
Capital costs of RAS are 3-5 times higher than sea cage production, limiting current deployment
Welfare monitoring in RAS enables real-time behavioural observation not possible in sea cage environments

Welfare Considerations

This topic has significant welfare implications for the animals involved. Evidence-based management approaches and appropriate veterinary care can substantially improve outcomes.

What You Can Do

Consult your veterinarian for guidance specific to your situation
Follow evidence-based management protocols
Monitor animals closely and intervene promptly when welfare concerns arise
Stay updated with current research and best practices
Share knowledge with others to improve welfare across the sector