Saving bluefin tuna: The sushi delicacy threatened by climate change
BBCSaving bluefin tuna: The sushi delicacy threatened by climate change Getty Images Bluefin tuna are highly sensitive to temperature changes Once pushed to the brink of extinction by overfishing, bluefin tuna has experienced a spectacular rebound in recent years. "We are seeing bluefin tuna feeding in unusual areas, for example in the North Sea, around Scandinavia and Iceland," says Buzzi. We are already seeing changes in bluefin tuna migration patterns – Alessandro Buzzi Similar to tree rings, otoliths reveal a fish's age and contain isotopes which disclose its past environmental conditions, says Trueman. Getty Images As ocean temperatures rise, bluefin tuna are moving to colder waters While bluefin populations have rebounded in recent years, "the risk of extinction has sadly never gone away", says Glaser. "I would cautiously say we're seeing important scientific improvements in bluefin tuna stocks around the world," she says.