○http://www.nature.com/srep/2012/120809/srep00570/full/srep00570.html
Scientific Reports | Article Open
The biological impacts of the Fukushima nuclear accident on the pale grass blue butterfly
○原発事故で周辺のチョウに変異、子孫の世代で出現率高く
http://www.cnn.co.jp/world/35020475.html
2012.08.15 Wed posted at 14:40 JST
（ＣＮＮ） 東京電力福島第一原子力発電所の周辺で採集したチョウに変異や異常が見つかったとする調査結果がこのほど、科学誌ネイチャー系列のサイエンティフィック・リポーツ電子版に発表された。
調査は琉球大の大瀧丈二准教授らの研究チームが実施した。原発事故の引き金となった東日本大震災から２カ月後の昨年５月に福島県とその周辺で1００羽を超えるヤマトシジミを採集して調べたところ、１２％に異常や変異が見つかった。
異常は脚や触角、腹部、眼のくぼみに現れたほか、羽が折れたりしわが寄ったりしているものや、羽の大きさや色が変わったり、斑点がなかったり大きくなっているものがあった。採集したチョウを交配して生まれた子孫では変異の出現率が１８％に増え、一部は成虫になる前に死んだ。
この子孫と放射性物質の影響を受けていないチョウを交配した子孫では、変異の出現率は３４％に高まり、遺伝子を通じて世代間で変異が受け継がれていることが示唆された。
さらに、９月に採集した２００羽超では２８％に異常が見られ、子孫では５２％に跳ね上がった。９月に採集されたチョウは幼虫のころから放射性物質にさらされたことが原因とみられるという。
研究チームは変異の原因が原発事故にあることを確認するため、影響を受けていないチョウを採集して低濃度の放射性物質にさらしたところ、同様の結果が出たといい、「福島第一原発からの放射性核種がこの種に対して生理学的、遺伝的ダメージを与えているとの結論に達した」としている。
○http://news.sky.com/story/972383/mutant-butterflies-at-fukushima-nuclear-plant
Mutant Butterflies At Fukushima Nuclear Plant
Abnormalities raise fears radiation from the tsunami-crippled plant in Japan may have affected other species.
10:18pm UK, Tuesday 14 August 2012
Video: Mutant Butterflies At Fukushima
Genetic mutations have been found in three generations of butterflies near Japan's tsunami-hit Fukushima nuclear plant.
The abnormalities have raised fears that radiation may have spread to other species, including humans.
Around 12% of the pale grass blue species exposed to nuclear fallout as larvae immediately after the disaster had abnormalities.
These included smaller wings and damaged eyes, researchers said.
The insects were mated in a laboratory well outside the fallout zone and 18% of their offspring displayed similar problems.
That figure rose to 34% in the third generation of butterflies, said Joji Otaki, associate professor at Ryukyu University in Okinawa, Japan.
The crippled Fukushima Daiichi Nuclear Power plant is seen in Fukushima Prefecture in this undated handout photo released by Tokyo Electric Power Co. (TEPCO) April 14, 2011. The utility giant is still working on a detailed plan to end the country's nuclear crisis a month after it began as tests showed radiation levels in the sea near the complex had spiked. MANDATORY CREDIT REUTERS/Tokyo Electric Power Co. (TEPCO)/Handout The Fukushima plant was badly damaged in the tsunami
The researchers also collected another 240 butterflies in Fukushima in September last year, six months after the disaster.
Abnormalities were recorded in 52% of their offspring, which was "a dominantly high ratio", Mr Otaki said.
Mr Otaki said the high ratio could result from both external and internal exposure to radiation from the atmosphere and in contaminated food.
The results of the study were published in Scientific Reports, an online research journal from the publishers of Nature.
Mr Otaki later carried out a comparison test in Okinawa exposing unaffected butterflies to low levels of radiation. The results showed similar rates of abnormality, he said.
"We have reached the firm conclusion that radiation released from the Fukushima Daiichi plant damaged the genes of the butterflies," Mr Otaki said.
Pale blue grass butterfly The mutated pale grass blue butterflies have smaller wings/Pic: Laitche
The tsunami of March 2011 knocked out cooling systems at the plant.
It caused three reactors to go into meltdown in the world's worst atomic disaster for 25 years.
The findings will raise fears over the long-term effects of the leaks on people who were exposed in the days and weeks after the disaster.
Radiation spread over a large area and forced thousands to evacuate.
There are claims that radiation affected successive generations of people living in the atomic bomb-hit cities of Hiroshima and Nagasaki.
But Mr Otaki warned it was too soon to jump to conclusions, saying his team's results could not be directly applied to other species.
Scientific Reports | Article Open
The biological impacts of the Fukushima nuclear accident on the pale grass blue butterfly
○原発事故で周辺のチョウに変異、子孫の世代で出現率高く
http://www.cnn.co.jp/world/35020475.html
2012.08.15 Wed posted at 14:40 JST
（ＣＮＮ） 東京電力福島第一原子力発電所の周辺で採集したチョウに変異や異常が見つかったとする調査結果がこのほど、科学誌ネイチャー系列のサイエンティフィック・リポーツ電子版に発表された。
調査は琉球大の大瀧丈二准教授らの研究チームが実施した。原発事故の引き金となった東日本大震災から２カ月後の昨年５月に福島県とその周辺で1００羽を超えるヤマトシジミを採集して調べたところ、１２％に異常や変異が見つかった。
異常は脚や触角、腹部、眼のくぼみに現れたほか、羽が折れたりしわが寄ったりしているものや、羽の大きさや色が変わったり、斑点がなかったり大きくなっているものがあった。採集したチョウを交配して生まれた子孫では変異の出現率が１８％に増え、一部は成虫になる前に死んだ。
この子孫と放射性物質の影響を受けていないチョウを交配した子孫では、変異の出現率は３４％に高まり、遺伝子を通じて世代間で変異が受け継がれていることが示唆された。
さらに、９月に採集した２００羽超では２８％に異常が見られ、子孫では５２％に跳ね上がった。９月に採集されたチョウは幼虫のころから放射性物質にさらされたことが原因とみられるという。
研究チームは変異の原因が原発事故にあることを確認するため、影響を受けていないチョウを採集して低濃度の放射性物質にさらしたところ、同様の結果が出たといい、「福島第一原発からの放射性核種がこの種に対して生理学的、遺伝的ダメージを与えているとの結論に達した」としている。
○http://news.sky.com/story/972383/mutant-butterflies-at-fukushima-nuclear-plant
Mutant Butterflies At Fukushima Nuclear Plant
Abnormalities raise fears radiation from the tsunami-crippled plant in Japan may have affected other species.
10:18pm UK, Tuesday 14 August 2012
Video: Mutant Butterflies At Fukushima
Genetic mutations have been found in three generations of butterflies near Japan's tsunami-hit Fukushima nuclear plant.
The abnormalities have raised fears that radiation may have spread to other species, including humans.
Around 12% of the pale grass blue species exposed to nuclear fallout as larvae immediately after the disaster had abnormalities.
These included smaller wings and damaged eyes, researchers said.
The insects were mated in a laboratory well outside the fallout zone and 18% of their offspring displayed similar problems.
That figure rose to 34% in the third generation of butterflies, said Joji Otaki, associate professor at Ryukyu University in Okinawa, Japan.
The crippled Fukushima Daiichi Nuclear Power plant is seen in Fukushima Prefecture in this undated handout photo released by Tokyo Electric Power Co. (TEPCO) April 14, 2011. The utility giant is still working on a detailed plan to end the country's nuclear crisis a month after it began as tests showed radiation levels in the sea near the complex had spiked. MANDATORY CREDIT REUTERS/Tokyo Electric Power Co. (TEPCO)/Handout The Fukushima plant was badly damaged in the tsunami
The researchers also collected another 240 butterflies in Fukushima in September last year, six months after the disaster.
Abnormalities were recorded in 52% of their offspring, which was "a dominantly high ratio", Mr Otaki said.
Mr Otaki said the high ratio could result from both external and internal exposure to radiation from the atmosphere and in contaminated food.
The results of the study were published in Scientific Reports, an online research journal from the publishers of Nature.
Mr Otaki later carried out a comparison test in Okinawa exposing unaffected butterflies to low levels of radiation. The results showed similar rates of abnormality, he said.
"We have reached the firm conclusion that radiation released from the Fukushima Daiichi plant damaged the genes of the butterflies," Mr Otaki said.
Pale blue grass butterfly The mutated pale grass blue butterflies have smaller wings/Pic: Laitche
The tsunami of March 2011 knocked out cooling systems at the plant.
It caused three reactors to go into meltdown in the world's worst atomic disaster for 25 years.
The findings will raise fears over the long-term effects of the leaks on people who were exposed in the days and weeks after the disaster.
Radiation spread over a large area and forced thousands to evacuate.
There are claims that radiation affected successive generations of people living in the atomic bomb-hit cities of Hiroshima and Nagasaki.
But Mr Otaki warned it was too soon to jump to conclusions, saying his team's results could not be directly applied to other species.
