An application of stable isotope analysis on lifetime feeding history of wildlife

• Project/Area Number: 15K18619
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Ecology/Environment
• Research Institution: Forest Research and Management Organization
• Principal Investigator: NAKASHITA Rumiko 国立研究開発法人森林研究・整備機構, 森林総合研究所, 主任研究員 等 (00457839)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: 野生動物 / 食性履歴 / 安定同位体比 / 体毛 / 骨コラーゲン / 歯 / ツキノワグマ / クマ

Outline of Final Research Achievements

I developed a method to understand lifelong feeding history of Asiatic black bear to investigate suspected individuals in damage on crops or accident on humans. It became possible to reconstruct the individual-based feeding history of the period from sub adult to the capture by examining carbon and nitrogen stable isotope ratios of the tissues formed at different time period and those with different metabolic rates. Understanding lifelong feeding history of wildlife individually will enable us to investigate the cause of damages on crops or accident on humans. By accumulating such information, we can contribute on wildlife management based on scientific evidence.

Research Products

• [Journal Article] 2014年長野県大町市におけるツキノワグマの捕獲状況と捕獲個体の人里依存度 (2016)
  • Author(s): 中下留美子，橋本操，岸元良輔，瀧井暁子，鈴木彌生子，林秀剛，泉山茂之
  • Journal Title: 信州大学農学部AFC報告 Volume: 14 Pages: 51-62
  • NAID: 120007101351
  • Peer Reviewed
• [Presentation] Feeding history over a lifetime of an Asiatic black bear estimated by stable isotope analysis. (2017)
  • Author(s): Nakashita R., Suzuki Y., Kuroe M., Kishimoto R.
  • Organizer: the 25th International Conference on Bear Research and Management
  • Int'l Joint Research
• [Presentation] 秋田県鹿角市におけるツキノワグマ捕獲個体の安定同位体比解析 (2017)
  • Author(s): 中下留美子、山﨑晃司、泉山吉明、釣賀一二三
  • Organizer: 日本哺乳類学会2017年度大会
• [Presentation] ツキノワグマにおける食性の個体間のバリエーション (2016)
  • Author(s): 長沼知子、小池伸介、中下留美子、小坂井千夏、山﨑晃司、梶光一
  • Organizer: 日本哺乳類学会2016年度大会
  • Place of Presentation: 筑波大学（茨城県つくば市）
  • Year and Date: 2016-09-23
• [Presentation] Since when were captured Asiatic black bears dependent on human food? -by carbon and nitrogen stable isotope analysis of hair and bone collagen. (2016)
  • Author(s): Nakashita R, Suzuki Y, Hashimoto M, Kishimoto R, Takii A, Izumiyama S, Hayashi H.
  • Organizer: 24th International Conference on Bear Research and Management
  • Place of Presentation: Anchorage （USA)
  • Year and Date: 2016-06-13
  • Int'l Joint Research
• [Presentation] Foraging Variation of Asiatic Black Bears in Ashio-Nikko Mountains:Evidence for Individual Differences in Diet (2016)
  • Author(s): Naganuma T, Koike S, Nakashita R, Kozakai C, Yamazaki K, Kaji K.
  • Organizer: 24th International Conference on Bear Research and Management
  • Place of Presentation: Anchorage （USA)
  • Year and Date: 2016-06-13
  • Int'l Joint Research
• [Presentation] 長野県塩尻市における捕獲ツキノワグマの人里依存度-体毛および骨の生元素安定同位体比分析 (2015)
  • Author(s): 中下留美子、岸元良輔、橋本操、鈴木彌生子、濱口あかり、林秀剛
  • Organizer: 第21回「野生生物と社会」学会
  • Place of Presentation: 琉球大学（沖縄県西原町）
  • Year and Date: 2015-11-21
• [Presentation] Feeding ecology of Hokkaido brown bears revealed by stable isotope analysis and LA-ICPMS imaging. (2015)
  • Author(s): Nakashita R, Suzuki Y, Oishi M, Kobayashi K, Ito T, Masuda Y, Ohtaishi N, Loguntsev A, Sato Y
  • Organizer: The Wildlife Society 2015
  • Place of Presentation: Manitoba，Canada
  • Year and Date: 2015-10-17
  • Int'l Joint Research
• [Presentation] The capturing transition of Asiatic black bear in Shiojiri, Nagano, during 2005-2014, and the dependence of bears on human-origin food (2015)
  • Author(s): Nakashita R, Kishimoto R, Takii A, Hashimoto M, Suzuki Y, Izumiyama S, Hayashi H.
  • Organizer: Vth International Wildlife Management Congress
  • Place of Presentation: Sapporo，Japan
  • Year and Date: 2015-07-26
  • Int'l Joint Research
• [Presentation] 安定同位体比解析による野生動物の個体ベースの長期的な食性履歴推定法―捕獲ツキノワグマの加害履歴を調べる―. (2015)
  • Author(s): 中下留美子，鈴木彌生子，岸元良輔，蔦谷匠，林秀剛
  • Organizer: 第75回分析化学討論会
  • Place of Presentation: 山梨大学（山梨県甲府市）
  • Year and Date: 2015-05-23