Ecological response to environmental fluctuations and morphological evolution of terrestrial mammals in Ryukyu Islands during Pleistocene.

• Project/Area Number: 22800015
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Cultural property science
• Research Institution: The University of Tokyo
• Principal Investigator: KUBO Mugino 東京大学, 総合研究博物館, 特任研究員 (10582760)
• Project Period (FY): 2010 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥2,201,293 (Direct Cost: ¥1,693,303、Indirect Cost: ¥507,990); Fiscal Year 2012: ¥147,293 (Direct Cost: ¥113,303、Indirect Cost: ¥33,990); Fiscal Year 2011: ¥832,000 (Direct Cost: ¥640,000、Indirect Cost: ¥192,000); Fiscal Year 2010: ¥1,222,000 (Direct Cost: ¥940,000、Indirect Cost: ¥282,000)
• Keywords: 琉球列島 / 化石 / 脊椎動物 / リュウキュウジカ / 古生態学 / 更新世 / メゾウェア分析 / ニホンジカ / 安定同位体

Research Abstract

The present study investigated morphology and ecology of two extinct deer species (Cervus astylodon, Dicrocerus sp.) excavated from late Pleistocene Ryukyu Islands. From stable isotope analysis and mesowear analysis, it was estimated that both species primary consumed leaves of trees and bushes, but C. astylodon consumed grass more frequently, implying a niche partitioning between sympatric species.

Research Products

• [Journal Article] Female sika deer evolved larger incisors than males under relaxed selection against rapid tooth wear. (2013)
  • Author(s): Kubo, M. O., Minami, M., Higuchi, N., Ohnishi, N., Okada, A., Kaji, K., Ohba, T., Hosoi, E., Koizumi, T. and Takatsuki, S.
  • Journal Title: Biological Journal of the Linnean Society Volume: XXX
  • Peer Reviewed
• [Journal Article] Compensatory response of molar eruption for environment- mediated tooth wear in sika deer. (2011)
  • Author(s): Kubo, M. O., Kaji, K., Ohba, T., Hosoi, E., Koizumi, T. and Takatsuki, S.
  • Journal Title: Journal of Mammalogy Volume: 92 Pages: 1407-1417
  • Peer Reviewed
• [Journal Article] Mortality profiles of Late Pleistocene deer remains of Okinawa Island; evidence from the Hananda-Gama Cave and Yamashita-cho Cave I sites. (2011)
  • Author(s): Kubo, M. O., Fujita, M., Matsu'ura, S., Kondo, M. and Suwa, G.
  • Journal Title: Anthropological Science Volume: 119 Pages: 183-201
  • Peer Reviewed
• [Journal Article] Mortality profiles of Late Pleistocene deer remains of Okinawa Island ; evidence from the Hananda-Gama Cave and Yamashita-cho Cave Isites (2011)
  • Author(s): Kubo O.M., et al
  • Journal Title: Anthropological Science Volume: 119 Pages: 183-201
  • Peer Reviewed
• [Journal Article] Female sika deer evolved larger incisors than males under relaxed selection against rapid tooth wear.
  • Author(s): Kubo, M. O., Minami, M., Higuchi, N.,Ohnishi, N., Okada, A., Kaji, K., Ohba,T., Hosoi, E., Koizumi, T. and Takatsuki, S.
  • Journal Title: Biological Journal of the Linnean Society Volume: (in press)
  • Peer Reviewed
• [Presentation] 沖縄県南城市ハナンダガマから出土した更新世シカ類のメゾウェア分析 (2011)
  • Author(s): 久保麦野, 他3名
  • Organizer: 日本古生物学会2011年年会
  • Place of Presentation: 金沢大学
  • Year and Date: 2011-07-02
• [Presentation] メゾウェア解析によるニホンジカ個体群間比較
  • Author(s): 山田英佑・久保麦野
  • Organizer: 日本哺乳類学会2012年度大会
  • Place of Presentation: 麻布大学
• [Presentation] ニホンジカ切歯サイズに見られる性的二型―磨耗と繁殖戦略の違いがもたらす雌雄差
  • Author(s): 久保麦野・高槻成紀
  • Organizer: 日本哺乳類学会2012年度大会
  • Place of Presentation: 麻布大学
• [Presentation] 沖縄県南城市ハナンダガマから出土した後期更新世シカ類の古生態復元
  • Author(s): 久保麦野・藤田祐樹・山田英佑・仲谷英夫・大城逸朗・諏訪元
  • Organizer: 第66回日本人類学会大会
  • Place of Presentation: 慶応大学