Atlantic Mackerel in Aquaculture: Welfare of a Fast-Moving Pelagic Species

Atlantic mackerel (Scomber scombrus) are being explored as aquaculture candidates. Their highly active lifestyle presents significant welfare challenges in captive systems.

Key Facts

Mackerel are obligate ram-ventilators — they must swim continuously to pass water over their gills
They die rapidly in low-oxygen conditions due to their high metabolic rate
Mackerel require high-speed swimming and large tank volumes to exhibit normal behaviour
Current mackerel capture and ranching trials suffer from high initial mortality from capture stress

Welfare Considerations

The welfare challenges of ranching mackerel are substantial. Their obligate swimming requirement means any tank design must allow continuous circular swimming without sharp turns. Capture stress causes haemorrhage and organ damage, resulting in high short-term mortality. Their pelagic lifestyle and schooling behaviour means isolation causes immediate stress. Current evidence suggests that maintaining mackerel welfare in captive systems would require technological investment far beyond current commercial viability.

What You Can Do

Support research into capture stress mitigation methods for pelagic fish species
Advocate for welfare pre-assessments before new species are approved for commercial aquaculture development
Encourage certification schemes to include species suitability assessments based on welfare evidence
Choose mackerel products from wild capture fisheries with certified sustainable management as the preferred option