Environmental dynamics and ecological effects of radiocesium in wild Japanese monkeys

• Project/Area Number: 25517008
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: 復興農学
• Research Institution: Nippon Veterinary and Life Science University
• Principal Investigator: Hayama Shin-ichi 日本獣医生命科学大学, 獣医学部, 教授 (80183565)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: 原発災害 / ニホンザル / 放射性セシウム / 放射線被ばく / 原子力災害 / 放射線影響 / 繁殖

Outline of Final Research Achievements

The objective of this study was to determine the change in concentration of radiocesium 134Cs and 137Cs over time in the muscle of Japanese monkeys inhabiting Fukushima City located 70 km from the Fukushima Daiichi Nuclear Power Plant (NPP), and their health effect of radioactive materials. Cesium concentration in the muscle of monkeys was 6,000 - 25,000 Bq/kg in April 2011 and decreased over 3 months to around 1,000 Bq/kg. However, the concentration increased again to 2,000 - 3,000 Bq/kg in some animals during winter before returning to 1,000 Bq/kg in April 2012. The increasing phenomenon during winter was observed in every year after 2011. The female pregnancy rates in Japanese monkeys were estimated in about 50% since 2008, however, that was reduction in 20% in 2015.

Research Products

• [Journal Article] 原発災害による野生動物の健康影響を考える――ニホンザルを例に (2015)
  • Author(s): 羽山伸一
  • Journal Title: 環境と公害 Volume: 44 Pages: 47-50
  • Peer Reviewed
• [Journal Article] Low blood cell counts in wild Japanese monkeys after the Fukushima Daiichi nuclear disaster. (2014)
  • Author(s): 2.Kazuhiko Ochiai, Shin-ichi Hayama, Sachie Nakiri, Setsuko Nakanishi, Naomi Ishii, Taiki Uno, Takuya Kato, Fumiharu Konno, Yoshi Kawamoto, Shuichi Tsuchida, Toshinori Omi.
  • Journal Title: Scientific Reports Volume: 4 Issue: 1 Pages: 5793-5793
  • DOI: 10.3354/esr00553
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] 福島原発事故後の放射能影響を受ける野生哺乳類のモニタリングと管理問題に対する提言 (2013)
  • Author(s): 山田 文雄, 竹ノ下 祐二, 仲谷 淳, 河村 正二, 大井 徹, 大槻 晃太, 今野 文治, 羽山 伸一, 堀野 眞一
  • Journal Title: 哺乳類科学 Volume: 53 Pages: 373-386
  • NAID: 130003393460
• [Journal Article] Concentration of Radiocesium in the Wild Japanese Monkey (Macaca fuscata) over the First 15 Months after the Fukushima Daiichi Nuclear Disaster. (2013)
  • Author(s): Hayama, S., Nakiri, S., Nakanishi, S., Ishii, N., Uno, T., Kato, T., Konno, F., Kawamoto, Y., Tsuchida, S., Ochiai, K., and Omi, T.
  • Journal Title: PLoS ONE Volume: e68530 Issue: 7 Pages: e68530-e68530
  • DOI: 10.1371/journal.pone.0068530
  • Peer Reviewed
• [Presentation] HEMATOGENOUS FUNCTIONS AND MUSCLE RADIOCESIUM CONCENTRATIONS IN WILD JAPANESE MONKEYS AFTER FUKUSHIMA DISASTER (2014)
  • Author(s): S. Hayama, K. Ochiai, S. Nakiri, S. Nakanishi, N. Ishii, T. Uno, T. Kato, F. Konno, Y. Kawamoto, T. Tsuchida, T. Omi
  • Organizer: International Primatological Society
  • Place of Presentation: ハノイ
  • Year and Date: 2014-08-10 – 2014-08-18
• [Presentation] 福島市に生息する野生ニホンザルの筋肉中放射性セシウム濃度と造血機能との関係 (2013)
  • Author(s): 羽山伸一, 落合和彦, 名切幸枝, 中西せつ子, 石井奈穂美, 加藤卓也, 今野文治, 近江俊徳, 土田修一, 川本芳
  • Organizer: 日本野生動物医学会
  • Place of Presentation: 京都大学
• [Presentation] 福島市の野生ニホンザルにおける放射性セシウムの被ばく状況と健康影響 (2013)
  • Author(s): 羽山伸一
  • Organizer: 日本哺乳類学会・日本霊長類学会合同大会
  • Place of Presentation: 岡山理科大
  • Invited