Evolution of alternative reproductive tactics

• Project/Area Number: 24770017
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Ecology/Environment
• Research Institution: Osaka City University (2013-2014); Kyoto University (2012)
• Principal Investigator: OTA Kazutaka 大阪市立大学, 大学院理学研究科, 博士奨励研究員 (50527900)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2012: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: 代替繁殖戦術 / タンガニイカ湖 / 魚類 / 系統樹 / 適応進化 / 進化 / 多様性 / カワスズメ科魚類 / 色彩 / 生活史 / 適応 / 野外観察 / 分子実験

Outline of Final Research Achievements

In this study, the evolution of alternative reproductive tactics (ARTs) was examined in Lake Tanganyika cichlids where ARTs are considerably developed　and diversified. Among 35 species from 7 genera of tribe Lamprologini, ARTs were found in 25 species from 6 genera. Some of species in these genera did not exhibit ARTs. These show that ARTs evolved independently of each other within this tribe. This study also showed that the evolution of sneaking tactics is related to mating system and spawning substrates.

Research Products

• [Journal Article] Maternal food provisioning in a substrate-brooding African cichlid (2014)
  • Author(s): Ota, K., Kohda, M
  • Journal Title: PloS One Volume: 9 Issue: 6 Pages: e99094-e99094
  • DOI: 10.1371/journal.pone.0099094
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Bower-building behaviour is associated with increased sperm longevity in Tanganyikan cichlids. (2014)
  • Author(s): Morita, M., Awata, S., Yorifuji, M., Ota, K., Kohda, M. & Ochi, H.
  • Journal Title: Journal of Evolutionary Biology Volume: 27 Issue: 12 Pages: 2629-2643
  • DOI: 10.1111/jeb.12522
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Territorial males can sire more offspring in nests with smaller doors in the Cichlid Lamprologus lemairii (2014)
  • Author(s): K Ota, S Awata, M Morita, R Yokoyama, and M Kohda
  • Journal Title: Journal of Heredity Volume: in press Issue: 3 Pages: 416-422
  • DOI: 10.1093/jhered/esu009
  • Peer Reviewed
• [Journal Article] Sneaker males are not necessarily similar to females in colour in a sexually monochromatic cichlid (2013)
  • Author(s): Ota, K., Awata, S., Morita, M., & Kohda, M.
  • Journal Title: Journal of Zoology Volume: (Print ISSN 0952-8369) Issue: 1 Pages: 63-70
  • DOI: 10.1111/jzo.12125
  • Peer Reviewed
• [Presentation] 状況依存の巣場所選択をするタンガニイカシクリッド
  • Author(s): 太田和孝
  • Organizer: 日本生態学会
  • Place of Presentation: 広島国際会議場
• [Book] 魚類行動生態学入門 (2013)
  • Author(s): 太田和孝（分担執筆）
  • Total Pages: 265
  • Publisher: 東海大学出版会