Ecological study on sex change tactics in females of polygynous fishes

• Project/Area Number: 15K07222
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Ecology/Environment
• Research Institution: Hiroshima University
• Principal Investigator: Sakai Yoichi 広島大学, 生物圏科学研究科, 教授 (70309946)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000); Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: 性転換 / 一夫多妻 / ハゼ科 / スズメダイ科 / 産卵 / 産卵能力 / 操作実験 / 飼育実験 / 逆戻りコスト

Outline of Final Research Achievements

To contribute to understandings of mating strategies and tactics in reef fishes, field observational surveys and aquarium experiments focusing on mating behaviors and sex change patterns in females of polygynous damselfishes and gobies were conducted. In field surveys, a new sex change pattern called cryptic sex change was confirmed. In aquarium experiments, fecundity data in female individuals just after reversed-directive sex change were successfully obtained.

Research Products

• [Journal Article] Polygynous mating system and protogynous sex change in the gobiid fish Fusigobius neophytus (2016)
  • Author(s): Tsuboi M, Sakai Y
  • Journal Title: Journal of Ethology Volume: 34 Issue: 3 Pages: 263-275
  • DOI: 10.1007/s10164-016-0472-x
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Mating system of the freckled hawkfish, Paracirrhites forsteri (Cirrhitidae) on Kuchierabu-jima Island, southern Japan (2016)
  • Author(s): Kadota T, Sakai Y
  • Journal Title: Environmental Biology of Fishes Volume: 99 Issue: 10 Pages: 761-769
  • DOI: 10.1007/s10641-016-0520-y
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] Sex change, mating system, and effect of population density in reef fish (2017)
  • Author(s): Kuwamura, T., Sunobe, T., Sakai, Y.
  • Organizer: The 10th Indo-Pacific Fish Conference, Tahiti
  • Int'l Joint Research
• [Presentation] Cryptical sex change as a mating tactic in a coral dwelling polygynous damselfish Dascyllus reticulatus (2017)
  • Author(s): Sakanoue, R., Sakai, Y.
  • Organizer: The 10th Indo-Pacific Fish Conference, Tahiti
  • Int'l Joint Research
• [Presentation] 魚類の性表現と配偶システムに対する個体群密度の影響 (2017)
  • Author(s): 桑村哲生・須之部友基・坂井陽一
  • Organizer: 2017年度日本魚類学会年会
• [Presentation] 一夫一妻魚イレズミハゼの逆方向性転換に伴う繁殖成功の変化 -雄を経ても雌の産卵能力は維持されるのか- (2016)
  • Author(s): 齊藤洸介・坂井陽一
  • Organizer: 日本動物行動学会第35回大会
  • Place of Presentation: 新潟大学
  • Year and Date: 2016-11-11
• [Presentation] ルリスズメダイのメスの繁殖戦術 (2016)
  • Author(s): 森菜摘・冨山毅・坂井陽一・馬場宏治
  • Organizer: 日本動物行動学会第35回大会
  • Place of Presentation: 新潟大学
  • Year and Date: 2016-11-11
• [Presentation] イレズミハゼ P. semidoliata における逆方向性転換に要するコストの検討 (2016)
  • Author(s): 齊藤洸介・坂井陽一
  • Organizer: 第27回魚類生態研究会
  • Place of Presentation: 鹿児島大学
  • Year and Date: 2016-02-13
• [Presentation] 再びメスに戻ったオキナワベニハゼの二次オスは一人前に産卵できるのか (2015)
  • Author(s): 白井和紗・冨山毅・坂井陽一
  • Organizer: 日本動物行動学会第34回大会
  • Place of Presentation: 東京海洋大学
  • Year and Date: 2015-11-21
• [Presentation] 同居とつがい関係のねじれたルリスズメダイの複婚社会と性転換 (2015)
  • Author(s): 森 菜摘・冨山毅・坂井陽一
  • Organizer: 日本動物行動学会第34回大会
  • Place of Presentation: 東京海洋大学
  • Year and Date: 2015-11-21
• [Presentation] フタスジリュウキュウスズメダイにみられる隠蔽的な性転換 (2015)
  • Author(s): 坂上嶺・冨山毅・坂井陽一
  • Organizer: 日本動物行動学会第34回大会
  • Place of Presentation: 東京海洋大学
  • Year and Date: 2015-11-21