Japan's radiation found in San Diego bluefin tuna

Discussion in 'Fishing Chit Chat' started by Alfred, May 28, 2012.

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  1. Alfred

  2. gunnyslinger

    pre-seared tuna, mmmmmmmmm
  3. urbanlink

    Maybe the seiners will take a year or thousand off.
  4. MAD2NA

    Maybe the Tuna on the West coast will grow to record sizes due to radiation !
  5. Alfred

    Yea, :) It will be a bumper crop year. The tuna will be washing up on the beaches like last year. Maybe that is why the tuna pins are gone. Radiation.
  6. DHSDave


    "The levels of radioactive cesium were 10 times higher than the amount measured in tuna off the California coast in previous years. But even so, that's still far below safe-to-eat limits set by the U.S. and Japanese governments."

    Sure a litlle radiation can't be that bad for you...:rofl: Looks like it's going to be a catch and release year for me...
  7. middleofnowhere

  8. Neptune

    I couldn't find the place to put this article on the BD Site Map, But it's important, so I put it here.

    Japan's radiation found in bluefin tuna caught off San Diego.

    For the first time, scientists have detected radioactivity in fish that have migrated into California waters from the ocean off Japan, where radiation contaminated the sea after explosions tore through the Fukushima nuclear reactors last year.

    Radioactive cesium was detected in samples of highly prized Pacific bluefin tuna, but it is well below levels considered unsafe for humans, the scientists say.

    The evidence is "unequivocal" that the tuna - caught off San Diego a year ago - were contaminated with radiation from Japan's nuclear disaster, the researchers said.

    Virtually all bluefin tuna on the market in the United States is either farmed or caught far from the Fukushima area, so American consumers should not be affected by radiation contamination in their fish, seafood distributors say. The migratory bluefin studied by the researchers were all caught by sport fishermen and were not headed for the market.

    Daniel J. Madigan, a marine ecologist at Stanford's Hopkins Marine Station in Pacific Grove (Monterey County), Nicholas Fisher, a marine scientist internationally known as a specialist in radiation hazards at Stony Brook University on Long Island, and Zophia Baumann, a staff scientist in Fisher's laboratory, reported their discovery Monday in the early online edition of the Proceedings of the National Academy of Sciences.
    Unexpected discovery

    The finding was wholly unexpected, Madigan said. It came about when he was researching the migratory patterns of bluefin tuna as part of a broader study of Pacific fish migration.

    Madigan had collected samples of muscle tissue from 15 2-year-old tuna given to him by San Diego fishermen in August, and when tests detected radioactivity in one sample he sent all 15 samples to Fisher in Long Island, he said.

    The young tuna, averaging about 13 pounds apiece, were found to be contaminated with two radioactive forms of the element cesium. Isotopes called cesium-134 and cesium-137 do not exist in nature but are produced only in nuclear explosions such as the weapons tests of the Cold War era.

    Before the Fukushima earthquake and tsunami, low levels of the radioactive cesium-137 , which decays to harmlessness only over thousands of years, had been measured in Japanese waters, while the shorter-lived cesium-134 was undetectable, the scientists said. That difference, they said, was crucial in concluding that the radioactive contamination was linked to the Fukushima disaster.

    Increased concentrations of radioactivity contaminated nearly 60,000 square miles of the ocean off Japan after workers at Fukushima pumped thousands of tons of seawater over reactors last year to prevent a complete meltdown of the reactor cores.

    Fisher said there is one unanticipated benefit from Madigan's discovery of radioactivity in the bluefin tuna. If the cesium isotopes are also detected in other migratory ocean species like turtles, sharks, seals and seabirds, that information should prove valuable as "tracers" that would add fresh details of migratory patterns to what is now gathered by widespread tagging programs, he said.
    A new study planned

    Meanwhile, Madigan said, he is preparing to collect samples from a new group of bluefin tuna that have recently migrated to the waters off San Diego in order to determine their levels of radioactive cesium.

    They will have lived in Fukushima's contaminated ocean for a full year longer than the first fish he collected, and the scientists will seek to know whether radiation levels in the tunas' bodies have increased or decreased, he said.

    "We don't think there will be any public health concern from the results of the new tests," Fisher said, "but if we do see any higher concentrations of cesium, we will certainly alert public health agencies again."

    In Japan the fatty muscle in the tuna is particularly prized as a delicacy, sliced and eaten raw as sushi. It is very pricey, and early this year a nearly 600-pound Pacific bluefin sold in a Japanese wholesale market for the equivalent of $736,000 - $1,238 a pound




  9. Fin Fever

  10. bmachale

    How important can it be if the level is 10 times less than what is dangerous to humans. Brring 'em on, I want to catch one. Biggest and most glowing!
  11. 1:11

    unequivocal = 5 syllables = automatic bullshit
  12. Sluester

    Yup, don't go tuna fishing anymore...please.

  13. bmachale

    :shithappens: I'll take my chances. Read and see less than 10 times the dangerous level. Stay home. More for me! :finger::rofl:
  14. makohunterz

    new sport, bowfishing bft, if they glow it might just work
  15. YT Addict

    Interesting story and glad to hear its not at a level considered unsafe for humans. I can't eat bft raw anyways, I'm allergic to it haha.

    we'll, bluefin will be easier to see at night....I question the timing of this article and what fishermen would give up 15 bft's
  17. DHSDave

    Yeah that's your Gov't telling you a little radiation won't be that bad for you. :skullbone
    I'm not staying home but it hopefully will be a good catch and release year.
  18. DsplacdKamaaina

    Catch n release tuna... That'd be something!
  19. Smokehound

    Doesn't scare me. Cant be any worse than the pollution disneyland spews into my neighborhood..
  20. agrazela

    The story says muscle tissue samples from 15 BFT were used. At $1238/lb, that could still be some expensive tissue!

    The article's headline was (as is natural in "journalism") inaccurate and unnecessarily alarmist, but I found the article to be surprisingly level in tone. And frankly, I'm glad someone's looking at this.