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Fukushima Radiation in Migrating Bluefin Tuna Expected to Fall

Radioactive material found in bluefin tuna that swam or fed in waters off the crippled Fukushima nuclear plant in Japan is likely to decrease over time as the material dilutes in the ocean, scientists said.

A study of 15 Pacific bluefin caught off San Diego in August last year found levels of radioactive cesium 10 times higher than in fish caught in previous years and provide “unequivocal evidence” that the radiation came from Fukushima, researchers including Daniel Madigan and Nicholas Fisher said in a study published yesterday in the Proceedings of the National Academy of Sciences.