Aquaculture Welfare

Aquaculture: RAS (Recirculating Aquaculture Systems) Welfare

Land-based recirculating aquaculture systems offer potential welfare benefits over sea cage systems but introduce new welfare challenges that require careful management.

Key Facts

RAS filter, treat, and recycle water, enabling fish farming in landlocked locations
RAS enables precise control of water temperature, oxygen, and quality - key welfare parameters
High capital cost has limited RAS adoption but costs are falling with scale and innovation
System failures in RAS can cause rapid, catastrophic mortality due to lack of natural buffering
Stocking densities in commercial RAS can be very high, requiring careful welfare monitoring

Welfare Considerations

RAS offers genuine welfare advantages through precise water quality control, elimination of sea lice and parasites, and protection from environmental extremes. However, high stocking densities and the risk of catastrophic failure from system faults create new welfare challenges. Welfare monitoring in RAS must include robust system redundancy and emergency protocols alongside routine fish health assessment.

What You Can Do

Support development of welfare standards specific to RAS aquaculture
Advocate for stocking density limits and welfare monitoring requirements in RAS certification
Choose fish from RAS farms with documented welfare management protocols
Support research into optimal stocking density and welfare indicators for RAS species
Learn about RAS as an emerging aquaculture system with distinct welfare characteristics