Mackerel stocks recover but risks remain

Princes has welcomed signs of recovery in north-east Atlantic mackerel stocks but warned that unresolved fisheries management challenges continue to threaten long-term sustainability, despite improved scientific advice for 2027.

The latest assessment from the International Council for the Exploration of the Sea (ICES) indicates increased stock biomass and a significant rise in recommended catch levels for next year. However, the stock remains only marginally above critical biological limits, while catches have repeatedly exceeded scientific recommendations.

David McDiarmid, corporate relations director at Princes Group, said: “Healthy, well-managed fisheries are in everyone’s interest, and whilst we are encouraged by the progress in the recovery of north-east Atlantic mackerel stocks, the latest advice demonstrates why sustainability decisions need to be based on long-term evidence rather than a single headline figure.”

He added that improved biomass did not resolve wider concerns surrounding the fishery, particularly the absence of an internationally agreed management framework and total allowable catch.

These longstanding issues contributed to the fishery losing its Marine Stewardship Council (MSC) certification, leaving seafood businesses facing continued questions over responsible sourcing.

Princes switched its branded mackerel range to MSC-certified Chilean jack mackerel in 2025, citing its commitment to sustainable sourcing and protecting marine ecosystems. The company said the latest ICES assessment would not change that decision.

READ MORE: Industry welcomes mackerel stock increase

The seafood group said purchasing decisions should reflect long-term scientific evidence, recognised certification standards and the health of marine resources, rather than short-term improvements in stock assessments.

Princes will continue reviewing its sourcing policy as scientific advice and sustainability standards evolve, maintaining its commitment to supplying wild-caught seafood from independently certified sustainable sources.

The company has previously indicated it would consider returning to north-east Atlantic mackerel if the fishery regains MSC certification. The latest assessment offers encouragement, but Princes said sustained recovery and effective international management remain essential to securing the fishery’s future.