A new model reveals two major hotspots within the Gulf of Mexico where bluefin tuna prefer to spawn in circular swirling water masses known as cyclonic eddies.
Sadly, the model also indicates the tuna are spawning there right now—and that the hotspots lie in waters befouled by the Deepwater Horizon oil spill.
The Gulf of Mexico bluefins have suffered a huge population decline since 1950. A 20-year plan to rebuild the stock has failed utterly. That failure led the United Nations to consider listing the species as endangered last March—a decision they cowardly backed out of. The senior author of the paper in PLoS ONE, Barbara Block, tells Stanford University:
"Both catch data and electronic tags indicate the Gulf of Mexico along the continental shelf is the preferred habitat of this majestic fish. I think it is amazing how precisely we can predict where the bluefin are. Unfortunately their spawning habitat overlaps the Deepwater Horizon oil accident site, and the timing of the spill coincides with the time when we expect them to be there spawning."