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How does black bears spend their spring and summer - individual based ecological and physiological studies -

Research Project

Project/Area Number 19H03002
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 40010:Forest science-related
Research InstitutionTokyo University of Agriculture

Principal Investigator

Yamazaki Koji  東京農業大学, 地域環境科学部, 教授 (40568424)

Co-Investigator(Kenkyū-buntansha) 坪田 敏男  北海道大学, 獣医学研究院, 教授 (10207441)
森光 由樹  兵庫県立大学, 自然・環境科学研究所, 准教授 (20453160)
小池 伸介  東京農工大学, (連合)農学研究科(研究院), 教授 (40514865)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000)
Fiscal Year 2021: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2020: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2019: ¥10,790,000 (Direct Cost: ¥8,300,000、Indirect Cost: ¥2,490,000)
Keywordsツキノワグマ / 生態 / 生理 / 行動生態 / 繁殖生理
Outline of Research at the Start

これまでの研究により,ツキノワグマは秋期の飽食期に蓄えた体脂肪を,冬眠期間中のみならず,冬眠明け後の春から夏にかけても継続利用することを確かめた。春から夏は,高栄養で採食効率の良い食物の獲得が難しいためである。そのためクマは,春期から活動を徐々に上昇させるものの,動き回るとエネルギー収支がマイナスになる夏期後半には,活動を停滞させる。しかし,春から夏は,成獣メスの育児時期であり,成獣オスや単独のメスには発情期という種の存続をかけた時期にあたる。新しい研究技術を用い,春から夏のクマの個体レベルでの行動と生理に関する相違を明らかにすると共に,秋期以前の人里へのクマの出没機構の解明にも役立てる。

Outline of Final Research Achievements

From spring to summer can be critical season for Japanese black bears, because of the body fat reserve which obtained in last autumn has been decreasing. Hence, the bears should ideally decline the activity level, and should minimize their energy expenditure during this period. We determine how the bears in different social status (e.g., sex, age, cub existence) respond to this situation using modern study equipment and methods. In the result, most of the bears, female with cub, adult males in heat, sub-adult male, were not able to decline the activity level. This behavioral character may cause the bear intrusion to human residential area before autumn.

Academic Significance and Societal Importance of the Research Achievements

これまで明らかにされてこなかった,ツキノワグマの春から夏の生態と生理について,私たちが開発から携わった機材を用いることにより新たな知見を得ることが出来た。ツキノワグマの人間生活空間への大量出没では,冬眠前の秋期の食欲亢進期(飽食期)の堅果の結実多寡が出没のひとつのトリガーであることが確認されているものの,実際の出没は堅果結実前の春から夏にはじまり,その機序は十分に説明できていない。本研究の成果は,ツキノワグマの出没機序の解明に新しい光を当てることが期待でき,社会的意義も大きなものである。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (21 results)

All 2022 2021 2020 2019 Other

All Int'l Joint Research (2 results) Journal Article (15 results) (of which Int'l Joint Research: 8 results,  Peer Reviewed: 14 results,  Open Access: 5 results) Presentation (3 results) Book (1 results)

  • [Int'l Joint Research] College of Veterinary Medicine/Washington State University(米国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] Applied Sciences/Inland Norway University(ノルウェー)

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Composite Brownian walks best explain the movement patterns of Asian black bears, irrespective of sex, seasonality, and food availability2022

    • Author(s)
      Ando Kyohei、Yoshikawa Tetsuro、Kozakai Chinatsu、Yamazaki Koji、Naganuma Tomoko、Inagaki Akino、Koike Shinsuke
    • Journal Title

      Ecological Research

      Volume: - Issue: 4 Pages: 522-531

    • DOI

      10.1111/1440-1703.12310

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Functional dietary response of Asian black bears to changes in sika deer density2022

    • Author(s)
      Naganuma Tomoko、Nakashita Rumiko、Tochigi Kahoko、Zedrosser Andreas、Kozakai Chinatsu、Yamazaki Koji、Koike Shinsuke
    • Journal Title

      The Journal of Wildlife Management

      Volume: - Issue: 5

    • DOI

      10.1002/jwmg.22218

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Associations between plasma testosterone levels and season, nutritional status, age, and body size in free-ranging male Asian black bears (Ursus thibetanus) in central Honshu, Japan2021

    • Author(s)
      Tomiyasu Jumpei、Kayano Mitsunori、Hazano Ken、Matsui Motozumi、Nemoto Yui、Naganuma Tomoko、Koike Shinsuke、Yamazaki Koji
    • Journal Title

      General and Comparative Endocrinology

      Volume: 309 Pages: 113794-113794

    • DOI

      10.1016/j.ygcen.2021.113794

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Animal‐borne video systems provide insight into the reproductive behavior of the Asian black bear2021

    • Author(s)
      Naganuma Tomoko、Tanaka Mii、Tezuka Shiori、M.J.G. Steyaert Sam、Tochigi Kahoko、Inagaki Akino、Myojo Hiroaki、Yamazaki Koji、Koike Shinsuke
    • Journal Title

      Ecology and Evolution

      Volume: 11 Issue: 14 Pages: 9182-9190

    • DOI

      10.1002/ece3.7722

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Food caching by bears: A literature review and new observations for Asiatic and American black bears2021

    • Author(s)
      Allen Maximilian L.、Wittmer Heiko U.、Ingaki Akino、Yamazaki Koji、Koike Shinsuke
    • Journal Title

      Ursus

      Volume: 2021 Issue: 32e10

    • DOI

      10.2192/ursus-d-20-00008.1

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Factors Affecting Pre-Denning Activity in Asian Black Bears2021

    • Author(s)
      Baek Seungyun、Iwasaki Tadashi、Yamazaki Koji、Naganuma Tomoko、Inagaki Akino、Tochigi Kahoko、Allen Maximilian L.、Kozakai Chinatsu、Koike Shinsuke
    • Journal Title

      Mammal Study

      Volume: 46 Issue: 4 Pages: 341-346

    • DOI

      10.3106/ms2020-0101

    • NAID

      40022723849

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Molecular detection of apicomplexan protozoa in Hokkaido brown bears (Ursus arctos yesoensis) and Japanese black bears (Ursus thibetanus japonicus)2020

    • Author(s)
      Moustafa Mohamed Abdallah Mohamed、Sasaki Ayaka、Shimozuru Michito、Nakao Ryo、Sashika Mariko、Yamazaki Koji、Koike Shinsuke、Tanaka Junpei、Tamatani Hiroo、Yamanaka Masami、Ishinazaka Tsuyoshi、Tsubota Toshio
    • Journal Title

      Parasitology Research

      Volume: 119 Issue: 11 Pages: 3739-3753

    • DOI

      10.1007/s00436-020-06873-3

    • NAID

      120007168163

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Age- and Sex-Associated Differences in the Diet of the Asian Black Bear: Importance of Hard Mast and Sika Deer2020

    • Author(s)
      Naganuma Tomoko、Koike Shinsuke、Nakashita Rumiko、Kozakai Chinatsu、Yamazaki Koji、Furusaka Shino、Kaji Koichi
    • Journal Title

      Mammal Study

      Volume: 45 Issue: 2 Pages: 155-166

    • DOI

      10.3106/ms2019-0051

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Vertebrate scavenger guild composition and utilization of carrion in an East Asian temperate forest2020

    • Author(s)
      Inagaki Akino、Allen Maximilian L.、Maruyama Tetsuya、Yamazaki Koji、Tochigi Kahoko、Naganuma Tomoko、Koike Shinsuke
    • Journal Title

      Ecology and Evolution

      Volume: 10 Issue: 3 Pages: 1223-1232

    • DOI

      10.1002/ece3.5976

    • Related Report
      2020 Annual Research Report 2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 錯誤捕獲問題から目をそらし続けることはできない2020

    • Author(s)
      山﨑晃司,小坂井千夏,釣賀一二三,中川恒祐,近藤 麻実
    • Journal Title

      哺乳類科学

      Volume: 60 Pages: 321-326

    • NAID

      130007884425

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Downhill seed dispersal by temperate mammals: a potential threat to plant escape from global warming2019

    • Author(s)
      Naoe Shoji、Tayasu Ichiro、Sakai Yoichiro、Masaki Takashi、Kobayashi Kazuki、Nakajima Akiko、Sato Yoshikazu、Yamazaki Koji、Kiyokawa Hiroki、Koike Shinsuke
    • Journal Title

      Scientific Reports

      Volume: 9 Issue: 1 Pages: 14932-14932

    • DOI

      10.1038/s41598-019-51376-6

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Estimating the seasonal energy balance in Asian black bears and associated factors2019

    • Author(s)
      Furusaka Shino、Tochigi Kahoko、Yamazaki Koji、Naganuma Tomoko、Inagaki Akino、Koike Shinsuke
    • Journal Title

      Ecosphere

      Volume: 10 Issue: 10 Pages: 1-20

    • DOI

      10.1002/ecs2.2891

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Metabolic derangements and reduced survival of bile-extracted Asiatic black bears (Ursus thibetanus)2019

    • Author(s)
      Bando Monica Kaho Herkules、Nelson O. Lynne、Kogan Clark、Sellon Rance、Wiest Michelle、Bacon Heather J.、Hunter-Ishikawa Mandala、Leadbeater Wendy、Yamazaki Koji、Jin Yipeng、Komatsu Takeshi、McGeachy David
    • Journal Title

      BMC Veterinary Research

      Volume: 15 Issue: 1 Pages: 1-16

    • DOI

      10.1186/s12917-019-2006-6

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] 東京のツキノワグマの保全とこれから2019

    • Author(s)
      山﨑晃司
    • Journal Title

      森林野生動物学研究会誌

      Volume: 44 Pages: 51-55

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Heart rate during hyperphagia differs between two bear species2019

    • Author(s)
      Fuchs Boris、Yamazaki Koji、Evans Alina L.、Tsubota Toshio、Koike Shinsuke、Naganuma Tomoko、Arnemo Jon M.
    • Journal Title

      Biology Letters

      Volume: 15 Issue: 1 Pages: 1-4

    • DOI

      10.1098/rsbl.2018.0681

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] クマ類による人身事故防止における情報収集の重要性2021

    • Author(s)
      山﨑晃司・釣賀一二三・近藤麻実・鵜野レイナ・玉谷宏夫・澤田誠吾・岸元良輔・白石俊明・後藤優介・小坂井千夏・中川恒祐
    • Organizer
      日本哺乳類学会令和3年度度大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] カメラ首輪を用いたツキノワグマの配偶行動の検証2021

    • Author(s)
      長沼知子・田中美衣・手塚詩織・栃木香帆子・稲垣亜希乃・名生啓晃・山﨑晃司・小池伸介
    • Organizer
      日本哺乳類学会令和3年度度大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] ツキノワグマの繁殖パラメータの推定の試み2021

    • Author(s)
      栃木香帆子・深澤圭太・黒江美紗子・姉崎智子・長沼知子・小坂井千夏・稲垣亜希乃・山﨑晃司・小池伸介
    • Organizer
      日本哺乳類学会令和3年度度大会
    • Related Report
      2021 Annual Research Report
  • [Book] Bears of the World: Ecology, Conservation and Management2020

    • Author(s)
      Vincenzo Penteriani, Mario Melletti(編)
    • Total Pages
      406
    • Publisher
      Cambridge University Press
    • Related Report
      2020 Annual Research Report

URL: 

Published: 2019-04-18   Modified: 2023-01-30  

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