*Takashi Kamijo1, Noriaki Nanba2, Arimi Take3, Shinji Handa4, Keniichiro Ishida1, Hodeaki Mori5, Kazuto Kawakami6, Tomoyuki Nakano7
(1.Institute of Life and Environmental Sciences, University of Tsukuba, 2.Health and Environmental Risk Division, National Institute for Environmental Studies, 3.Master's Program in Biology, University of Tsukuba, 4.Hiroshima Environment and Health Association, 5.Japan Wildlife Research Center, 6.Forestry and Forest Products Research Institute, 7.Seto Marine Biological Laboratory, Field Science Education and Research Center, Kyoto University)