The Spanish tropical tuna freezer fleet is an international benchmark for sustainability. However, its activity takes place in complex ecosystems where catch selectivity and the reduction of ecological impacts remain ongoing challenges.
The objective was to minimise the unintended effects of purse seine fishing—such as bycatch of vulnerable species and the impact of fish aggregating devices (FADs)—while ensuring the economic and environmental viability of the fleet, in line with international sustainability standards.
For more than a decade, AZTI has worked closely with the tropical tuna freezer fleet, represented by OPAGAC and ANABAC, to develop and implement the Code of Good Practices adopted by the sector in 2012.
The programme, scientifically verified by AZTI, promotes concrete measures that have become a global model of responsible fishing, including:
Use of 100% non-entangling and biodegradable FADs, reducing their impact on the marine environment.
Safe release techniques for sensitive species (sharks, turtles, rays), using specific tools that significantly increase post-release survival.
Electronic monitoring systems and on-board observers on 100% of vessels and support boats.
Continuous training for crews, skippers, and observers.
Independent scientific evaluation by AZTI through a technical review committee.
In parallel, AZTI leads innovation projects on selective fishing devices that can also be applied to other fisheries (such as trawling or longlining), improving gear selectivity and reducing unwanted catches.
Significant reduction in the mortality of vulnerable species through the application of safe release practices.
100% sustainable FADs: non-entangling, biodegradable, and made of low-impact materials.
Improved safety on board and reduced risk of accidents for crews.
Low implementation costs and adaptability to different vessel types.
Proven improvement in fishing selectivity, contributing to resource sustainability and compliance with international marine conservation commitments.
International recognition of the collaboration model between AZTI and the Spanish tuna sector as a successful example of integrating applied science, technological innovation, and environmental responsibility.
Sectors: Fisheries and aquaculture sector
Research lines: Blue Economy, Efficient, sustainable fisheries and aquaculture
Research sublines: Sustainable fishery management