Fisheries Science

, Volume 81, Issue 4, pp 737–747 | Cite as

Comparison of radioactive cesium contamination of lake water, bottom sediment, plankton, and freshwater fish among lakes of Fukushima Prefecture, Japan after the Fukushima fallout

  • Keishi Matsuda
  • Kaori Takagi
  • Atsushi Tomiya
  • Masahiro Enomoto
  • Jun-ichi Tsuboi
  • Hideki Kaeriyama
  • Daisuke Ambe
  • Ken Fujimoto
  • Tsuneo Ono
  • Kazuo Uchida
  • Takami Morita
  • Shoichiro Yamamoto
Original Article Environment

Abstract

Levels of radiocesium (134Cs + 137Cs) contamination in lake water, bottom sediment, plankton, and fish were investigated in three geographically separated lakes in Fukushima Prefecture (Lake Hayama, Lake Akimoto, and Lake Tagokura) between June 2012 and November 2013. Levels of contamination differed among the three lakes, with the highest levels of each measured component in Lake Hayama, followed by Lake Akimoto, and the least contamination in Lake Tagokura. Among the lakes, the magnitude of contamination decreased with distance from the Fukushima Dai-ichi Nuclear Power Plant. Mean radiocesium concentrations were higher in piscivorous fish than in other fish, possibly reflecting differences in trophic level. The radiocesium concentrations in some fish species decreased significantly by 33–65 % during the period between 2012 and 2013. Radiocesium concentrations of the lake water, bottom sediment, plankton, and fish were significantly correlated with surface soil radiocesium content near lake sites.

Keywords

Fukushima fallout Lake Hayama Lake Akimoto Lake Tagokura Piscivorous fish Radiocesium contamination Trophic level 

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Copyright information

© Japanese Society of Fisheries Science 2015

Authors and Affiliations

  • Keishi Matsuda
    • 1
  • Kaori Takagi
    • 1
  • Atsushi Tomiya
    • 2
  • Masahiro Enomoto
    • 2
  • Jun-ichi Tsuboi
    • 1
  • Hideki Kaeriyama
    • 3
  • Daisuke Ambe
    • 3
  • Ken Fujimoto
    • 3
  • Tsuneo Ono
    • 3
  • Kazuo Uchida
    • 4
  • Takami Morita
    • 3
  • Shoichiro Yamamoto
    • 1
  1. 1.National Research Institute of Aquaculture, Fisheries Research AgencyNikkoJapan
  2. 2.Fukushima Prefectural Fisheries Experimental StationIwakiJapan
  3. 3.National Research Institute of Fisheries Science, Fisheries Research AgencyYokohamaJapan
  4. 4.Fisheries Research AgencyYokohamaJapan

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