Food safety in European aquaculture takes a decisive technical leap with the publication of the joint FAO/IOC-UNESCO/IAEA guidance. This framework addresses a critical gap in international standards like the Codex Alimentarius, providing a definitive path for the management of Harmful Algal Blooms (HABs).
The fundamental shift in monitoring is the transition to a preventive model. The roadmap mandates the surveillance of microalgae populations in the water column as a key pillar to anticipate contamination before it affects the product. This allows for a more refined risk management: production areas will now rely on fixed sampling points and, in many cases, sentinel species (such as mussels) to trigger earlier warnings for high-value crops like oysters or clams.
Regarding production closures, the impact is double-edged. While early warning prevents toxic products from reaching the market, the guidance establishes a strict recovery protocol: zones may only reopen after two consecutive negative results at least 48 hours apart. Furthermore, the industry is warned of "post-harvest concentration": industrial processes like steaming can double toxin levels due to water loss, meaning product harvested within legal limits could exceed them after processing.
This international standardisation, supported by the IEO-CSIC and experts like Begoña Ben-Gigirey , ensures that seafood trade risks are managed under a robust, common scientific criterion, bolstering the competitiveness of the European sector.
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