Matsushima Noe, Ihara Sadao, Takase Minoru, Horiguchi Toshihiro
Research Center for Environmental Risk, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, 305-8506, Japan.
Environmental education, regional education development, Hokkaido University of Education, 1-15-55 Shiroyama, Kushiro, Hokkaido 085-8580, Japan.
Sci Rep. 2015 Apr 10;5:9712. doi: 10.1038/srep09712.
We investigated the accumulation of radionuclides in frogs inhabiting radioactively contaminated areas around Fukushima Daiichi Nuclear Power Plant (FDNPP) to search for possible adverse effects due to radionuclides. We collected 5 frog species and soil samples in areas within and outside a 20-km radius from FDNPP in August and September 2012 and determined their radiocesium concentrations ((134)Cs and (137)Cs). There was a positive correlation between radiocesium concentrations in the soil samples and frogs, and the highest concentration in frogs was 47,278.53 Bq/kg-wet. Although we conducted a histological examination of frog ovaries and testes by light microscopy to detect possible effects of radionuclides on the morphology of germ cells, there were no clear abnormalities in the gonadal tissues of frogs collected from sites with different contamination levels.
我们调查了居住在福岛第一核电站（FDNPP）周边放射性污染区域的青蛙体内放射性核素的积累情况，以探寻放射性核素可能产生的不利影响。2012年8月和9月，我们在FDNPP半径20公里范围内外的区域采集了5种青蛙和土壤样本，并测定了它们的放射性铯浓度（(134)Cs和(137)Cs）。土壤样本和青蛙体内的放射性铯浓度之间存在正相关，青蛙体内的最高浓度为47,278.53贝可勒尔/千克湿重。尽管我们通过光学显微镜对青蛙的卵巢和睾丸进行了组织学检查，以检测放射性核素对生殖细胞形态的可能影响，但从不同污染水平地点采集的青蛙性腺组织中未发现明显异常。
