Developmental processes of evolutionary gain and loss of anti-predatory traits

• Project/Area Number: 19570026
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Ecology/Environment
• Research Institution: Toho University
• Principal Investigator: HASEGAWA Masami Toho University, 理学部, 教授 (40250162)
• Co-Investigator(Kenkyū-buntansha): MIYAJI Kazuyuki 東邦大学, 理学部, 准教授 (50112909)
• Project Period (FY): 2007 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2008: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000); Fiscal Year 2007: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• Keywords: 島嶼 / 捕食者 / 進化 / 色彩パタン / 色素細胞 / 地理的変異 / 生物間相互作用 / 個体発生

Research Abstract

自然選択圧の変化に対応した適応形質の進化的喪失と再獲得の歴史が当該形質の発生過程に刻印されているとの作業仮説を立て、伊豆諸島と伊豆半島に固有なオカダトカゲの色彩パタンの進化をシマヘビの捕食を回避する形質として比較研究した。その結果、オカダトカゲの不明瞭なストライプと不鮮明な尾部の青色パタンはまずシマヘビのいない状態で先に進化し、シマヘビが伊豆諸島に後から侵入して、色彩パタンの明瞭化が進化したことがわかった。

Research Products

• [Journal Article] Does a gigantic insular snake grow faster or live longer to be gigantic? Evidence from a long-term field study (2008)
  • Author(s): Hasegawa M. and A.Mori
  • Journal Title: South Americal Journal of Herpetologyc 3(2) Pages: 145-154
• [Journal Article] Hasegawa M. and A. Mori(2008) Does a gigantic insular snake growfaster or live longer to be gigantic? Evidence from a long-termfield study. (2008)
  • Author(s): Hasegawa M., A. Mori
  • Journal Title: South American Journal of Herpetology3(2) : 145-154. 3(2) Pages: 145-154
  • Peer Reviewed
• [Journal Article] A time-calibrated phylogenetic approach to assessing the phylogeography and colonization history of snakes in the Japanese Izu Islands
  • Author(s): Kuriyama T., M. Brandley, S.Vincent, A.Katayama, M. Honda, and M. Hasegawa
  • Journal Title: Journal of Biogeography (in preparation)
• [Journal Article] A time-calibrated phylogenetic approach to assessing the phylogeography and colonization history of snakes in the Japanese Izu Islands
  • Author(s): Kuriyama, et. al.
  • Journal Title: Journal of Biogeography
• [Presentation] オカダトカゲの色彩パターン-捕食者に対応した地理的変異- (2009)
  • Author(s): 栗山武夫・森本元・宮地和幸・杉本雅純
  • Organizer: 日本生態学会第56回大会企画集会(伊豆諸島の生物地理と生物間相互作用)企画者
  • Place of Presentation: 岩手
• [Presentation] Developmental pattern of pigment cells produc ing geographical variation in coloration in the Okada's five-lined skink, Plestiodon latiscutatus. (2008)
  • Author(s): Kuriyama T., K. Miyaji. M. Sugimoto, M. Hasegawa
  • Organizer: 国際色素細胞学会
  • Place of Presentation: 札幌市
  • Year and Date: 2008-05-08
• [Presentation] オカダトカゲの色彩パタンの地理的変異-色素細胞の発生学的研究- (2008)
  • Author(s): 栗山武夫・宮地和幸・杉本雅純・長谷川雅美
  • Organizer: 日本生態学会
  • Place of Presentation: 九州
  • Year and Date: 2008-03-17
• [Presentation] Developmental pattern of pigment cells producing geographical coloration in the Okada's five-lined skink, Plestiodon latiscutatus (2008)
  • Author(s): Takeo Kuriyama, Kazuyuki Miyaji, Masazumi Sugimoto,Masami Hasegawa
  • Organizer: 国際色素細胞学会Satellite Meeting of Pigment Cell Development Interest Group招待講演
  • Place of Presentation: 札幌
• [Presentation] Developmental pattern of pigment cells producing geographical coloration in the Okada's five-lined skink, Plestiodon latiscutatus (2008)
  • Author(s): Takeo Kuriyama, Kazuyuki Miyaji, Masazumi Sugimoto, Masami Hasegawa
  • Organizer: 国際色素細胞学会
  • Place of Presentation: 札幌
• [Presentation] オカダトカゲの色彩パタンの地理的変異-色素細胞の発生学的研究 (2008)
  • Author(s): 栗山武夫・宮地和幸・杉本雅純・長谷川雅美
  • Organizer: 日本生態学会第55回大会
  • Place of Presentation: 福岡
• [Presentation] オカダトカゲの色彩パタンの地理的変異-色素細胞の発生学的研究 (2007)
  • Author(s): 栗山武夫・宮地和幸・杉本雅純・長谷川雅美
  • Organizer: 日本爬虫両棲類学会第46回大会
  • Place of Presentation: 沖縄