Studies show that tuna populations have shrunk by 90% since 1950. Most of this is due to overfishing. Every species of tuna in which humans eat are at risk of severe population decreases due to overfishing, but the bluefin tuna is in the gravest danger of virtual extinction. The variants of tuna typically found in the cans at grocery stores come from skipjack, yellow fin, and albacore. Due to the rapid rates of reproduction of these three most common variants of tuna, overfishing has not affected their populations in the way it has the bluefin tuna’s. Moreover, it is likely that the bluefin tuna will essentially no longer exist within 3 years from now.
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