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A nuclear disaster may lead to insights into the mysterious migrations of Pacific bluefin tuna, a fish species that recently has suffered a dramatic decline. Scientists report in a new study that they can use trace amounts of radiation in bluefin tuna to sketch the crisscrossing passage of the fish through the world's largest ocean. Understanding how many fish move back and forth may help with the conservation of bluefin tuna. During the Fukushima nuclear disaster, two years ago, radioactive particles flooded into the Pacific Ocean. Bluefin tuna swimming through these waters began to store certain radioisotopes, called cesium 134...

I'll bet no one else around here owns a calibrated radiation survey meter! I have posted this before, but it's worth repeating. A few months after the Fukushima meltdown, I took my survey meter to the grocery store. California veggies...fine. Fish display...fine. Canned tuna shelves....UH OH. I measured .05 rad/hour. That's over one rad/day. Since the tuna was in cans, the alpha and beta particles would not be detected, IIRC. If I remember my particle physics, my meter must have been detecting gammas or neutrons. If someone ingests the radioactive particles in the tuna, they will be irradiated from the...

(05-28) 12:48 PDT LOS ANGELES, (AP) -- Across the vast Pacific, the mighty bluefin tuna carried radioactive contamination that leaked from Japan's crippled nuclear plant to the shores of the United States 6,000 miles away — the first time a huge migrating fish has been shown to carry radioactivity such a distance. Read more: http://www.sfgate.com/cgi-bin/article.cgi?f=/n/a/2012/05/28/national/a120114D60.DTL#ixzz1wDhpH1BO