Condition of bluefin tuna in gulf of maine is declining

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Grading tuna at the Tsukiji fish market in Japan. UNH researchers found the quality of tuna has declined significantly since the early 1990s. Credit: Kaori Sato
Grading tuna at the Tsukiji fish market in Japan. UNH researchers found the quality of tuna has declined significantly since the early 1990s. Credit: Kaori Sato

The quality of giant bluefin tuna caught in the Gulf of Maine has declined significantly since the early 1990s, researchers at the University of New Hampshire have found by analyzing detailed logbooks from a commercial tuna grader at the Yankee Fisherman’s Co-op. The findings, published this week in Fishery Bulletin, indicate potential changes in food sources, shifts in reproductive or migratory patterns, or the impact of fishing may be the cause of this decline.


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