By Daniel Cressey of Nature magazine Ahead of a key international meeting on tuna catches, an assessment is painting a bleak picture of the conservation status of some of the world's most commercially valuable fish species. Bruce Collette, who studies ocean fish at the National Marine Fisheries Service Systematics Laboratory in Washington DC, and his colleagues conducted the first global assessment of the scrombids and billfish, groups of fish that include some of the species with the highest value as seafood, such as tuna and marlin, as well as staples such as mackerel.
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