Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8886318 | Marine Environmental Research | 2018 | 104 Pages |
Abstract
In bottom-sediment samples collected in 2012 from a coastal strip (â¼30â¯kmâ¯Ãâ¯120â¯km) off the Fukushima Daiichi Nuclear Power Plant (FDNPP), radiocesium activity concentrations were generally higher south of the FDNPP, with high activity concentration patches in the north. In periodic surveys conducted at nearshore sites during 2012-2016, no clear temporal trends were observed in radiocesium activity concentrations in seawater or bottom sediment, and activity concentrations were higher in fish than in invertebrates. During 2012-2014, radiocesium activity concentrations tended to decrease in fish, but during 2012-2013 in the south, some increases were observed. Radiocesium activity concentrations were significantly higher in some fish (e.g., Okamejei kenojei) directly offshore and south of the FDNPP than in the north. Activity concentrations in fish stomach contents were significantly correlated with those in muscle tissue, suggesting that the consumption of contaminated prey contributed greatly to radiocesium contamination in demersal fish.
Keywords
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Oceanography
Authors
Toshihiro Horiguchi, Keita Kodama, Takafumi Aramaki, Yoshiki Miyata, Seiya Nagao,