Evolutionary conditions for simultaneous hermaphroditism considered from mating frequency in Chromodorid Nudibranchs

• Project/Area Number: 22570029
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Ecology/Environment
• Research Institution: Nihon University
• Principal Investigator: NAKASHIMA Yasuhiro 日本大学, 経済学部, 教授 (50295383)
• Research Collaborator: SEKIZAWA Ayami 大阪市立大学, 理学研究科, 博士課程在学
• Project Period (FY): 2010 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2011: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2010: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: 行動生態 / 進化生態 / 同時雌雄同体 / 裸鰓類 / 配偶戦略 / 精子置換 / ウミウシ / 多回交尾 / 性淘汰 / 精子競争 / 受精嚢 / ウミウシ(裸鰓類) / 配偶行動 / 性的資源分配 / 同時的雌雄同体 / 繁殖戦略 / 生殖器 / 父子判定 / PCR

Research Abstract

DNA fingerprinting applied to veliger larvae from 30 egg masses of Chromodoris reticulata (misidentified as C. tinctoria at the beginning of the study) revealed the number of sperm donors (biological fathers) was estimated to 2 - 4. Stored sperms in bursa coluratrix and sperm receptacle were clarified to originate from plural individuals. These findings suggest that mating frequency in simultaneously hermaphroditic nudibranchs is not so scarce as hitherto imagined and sexual selection functions as strong as in gonochorists.

Research Products

• [Journal Article] Disposable penis and its replenishment in a simultaneous hermaphrodite. (2013)
  • Author(s): Sekizawa A., Seki S., Tokuzato M., Shiga S. & Nakashima Y.
  • Journal Title: Biology Letters Volume: vol.9 Issue: 2 Pages: 20121150-20121150
  • DOI: 10.1098/rsbl.2012.1150
  • Peer Reviewed
• [Journal Article] Sperm as a paternal investment : a model of sex allocation in sperm-digesting hermaphrodites (2012)
  • Author(s): Yamaguchi S., Sawada K., Nakashima Y., Takahashi S.
  • Journal Title: Theoretical Ecology Volume: 5(1) Pages: 99-103
  • Peer Reviewed
• [Journal Article] Isolation and characterization of microsatellite markers in the nudibranch (2011)
  • Author(s): Sato N., Sekizawa A., Awata S., Munehara H. & Nakashima Y.
  • Journal Title: Chromodoris tinctoria. Journal of the Malacological Society of Japan. Volume: 63(3) Pages: 214-217
  • Peer Reviewed
• [Journal Article] Isolation and characterization of microsatellite markers in the nudibranch, Chromodoris tinctoria (2011)
  • Author(s): Sato N., Sekizawa A., Awata S., Munehara H., Nakashima Y.
  • Journal Title: Venus (Japanese Journal of Malacology) Volume: (掲載確定 accepted)
  • NAID: 130005155495
  • Peer Reviewed
• [Journal Article] Sperm as a paternal investment: a model of sex allocation in sperm-digesting hermaphrodites. (2010)
  • Author(s): Yamaguchi S., Sawada K., Nakashima Y.,& Takahashi S.
  • Journal Title: Theoretical Ecology. Volume: 5(1) Pages: 99-103
  • Peer Reviewed
• [Journal Article] Social factors of group spawning as an alternative mating tactic in the territorial males of the threespot wrasse Halichoeres trimaculatus (2010)
  • Author(s): Suzuki S., Kuwamura T., Nakashima Y., Karino K., Kohda M
  • Journal Title: Environmental Biology of Fishes Volume: 89(1) Pages: 71-77
  • Peer Reviewed
• [Journal Article] Sperm as a paternal investment : a model of sex allocation in sperm-digesting hermaphrodites (2010)
  • Author(s): Yamaguchi S., Sawada K., Nakashima Y., Takahashi S
  • Journal Title: Theoretical Ecology Volume: (掲載確定 on line)
  • Peer Reviewed
• [Presentation] 同時雌雄同体のウミウシにおける性淘汰 (2013)
  • Author(s): 関澤彩眞,後藤慎介,中嶋康裕
  • Organizer: 第24回魚類生態研究会
  • Place of Presentation: 水産大学校田名臨海実験実習場,山口県熊毛郡平生町
• [Presentation] 同時雌雄同体のウミウシにおける性淘汰 (2013)
  • Author(s): 関澤彩眞, 後藤慎介, 中嶋康裕
  • Organizer: 第24回魚類生態研究会
  • Place of Presentation: 水産大学校田名臨海実験実習場
• [Presentation] 「精子掻き出し」をDNA分析によって初めて検証. (2012)
  • Author(s): 関澤彩眞,後藤慎介,中嶋康裕
  • Organizer: 日本動物行動学会第31回大会
  • Place of Presentation: 奈良女子大学,奈良市
• [Presentation] キイロウミウシ属の配偶行動と内部生殖器系の形態. (2012)
  • Author(s): 山梨津乃,村山大輔,朝比奈潔,関澤彩眞,中嶋康裕
  • Organizer: 日本動物行動学会第31回大会
  • Place of Presentation: 奈良女子大学,奈良市
• [Presentation] A sea slug removes allosperm with its thorny penis after copulation. (2012)
  • Author(s): Sekizawa A., Shiga S., Goto S., Nakashima Y.
  • Organizer: 14th International Behavioral EcologyCongress
  • Place of Presentation: Lund, Sweden.
• [Presentation] 双方向性転換を研究してはいけない理由. (2012)
  • Author(s): 中嶋康裕
  • Organizer: 第23回魚類生態研究会,広島大学生物生産学部
  • Place of Presentation: 広島県東広島市
• [Presentation] ウミウシは出会いが少ないから雌雄同体になっているのか? (2012)
  • Author(s): 関澤彩眞,後藤慎介,中嶋康裕
  • Organizer: 第23回魚類生態研究会,広島大学生物生産学部
  • Place of Presentation: 広島県東広島市
• [Presentation] A sea slug removes allosperm with its thorny penis after copulation. (2012)
  • Author(s): Sekizawa A., Shiga S., Goto S., Nakashima Y.
  • Organizer: 14th International Behavioral Ecology Congress
  • Place of Presentation: Lund, Sweden
• [Presentation] 「精子掻き出し」を DNA分析によって初めて検証 (2012)
  • Author(s): 関澤彩眞, 後藤慎介, 中嶋康裕
  • Organizer: 日本動物行動学会第31回大会
  • Place of Presentation: 奈良女子大学
• [Presentation] キイロウミウシ属の配偶行動と内部生殖器系の形態 (2012)
  • Author(s): 山梨津乃, 村山大輔, 朝比奈潔, 関澤彩眞, 中嶋康裕
  • Organizer: 日本動物行動学会第31回大会
  • Place of Presentation: 奈良女子大学
• [Presentation] ウミウシは出会いが少ないから雌雄同体になっているのか? (2012)
  • Author(s): 関澤彩眞, 後藤慎介, 中嶋康裕
  • Organizer: 第23回魚類生態研究会
  • Place of Presentation: 広島大学西条共同研修センター
• [Presentation] ウミウシの共食い～食っても得しない?食われても損しない? (2011)
  • Author(s): 中嶋康裕
  • Organizer: 2010年度第12回大阪市立大学動物社会学研究会
  • Place of Presentation: 大阪市立大学動物機能生態学研究室(旧動物社会学研究室),大阪市
  • Year and Date: 2011-03-05
• [Presentation] 同時雌雄同体なのに, キヌハダモドキはなぜ共食いするのか (2011)
  • Author(s): 中嶋康裕, 関澤彩眞
  • Organizer: 第11回東日本魚類生態研究会
  • Place of Presentation: 東海大学海洋学部三保研修館
  • Year and Date: 2011-02-20
• [Presentation] ペニスを自切・補充するウミウシとしないウミウシ. (2011)
  • Author(s): 関澤彩眞,志賀向子,中嶋康裕
  • Organizer: 日本動物学会第82回大会
  • Place of Presentation: 旭川市大雪クリスタルホール,旭川市
• [Presentation] ペニスを自切・補充するウミウシはどれくらいいるのか?Animal2011 (2011)
  • Author(s): 関澤彩眞,志賀向子,山梨津乃,宮島瞳,中嶋康裕
  • Organizer: 日本動物心理学会・日本動物行動学会・応用動物行動学会・日本家畜管理学会合同大会)
  • Place of Presentation: 慶應義塾大学三田キャンパス,東京都
• [Presentation] 性表現・性役割の可塑性と社会的地位-魚類の場合(コメンテイター)Animal2011 (2011)
  • Author(s): 中嶋康裕
  • Organizer: 日本動物心理学会・日本動物行動学会・応用動物行動学会・日本家畜管理学会合同大会
  • Place of Presentation: 慶應義塾大学三田キャンパス,東京都
• [Presentation] 同時雌雄同体のサラサウミウシは本当に出会いが少ないのか?Animal2011 (2011)
  • Author(s): 関澤彩眞,後藤慎介,中嶋康裕
  • Organizer: 日本動物心理学会・日本動物行動学会・応用動物行動学会・日本家畜管理学会合同大会
  • Place of Presentation: 慶應義塾大学三田キャンパス,東京都
• [Presentation] 同時雌雄同体なのに,キヌハダモドキはなぜ共食いするのか. (2011)
  • Author(s): 中嶋康裕,関澤彩眞
  • Organizer: 第11回東日本魚類生態研究会
  • Place of Presentation: 東海大学海洋学部三保研修館,静岡県清水市
• [Presentation] 同時雌雄同体のサラサウミウシは本当に出会いが少ないのか? (2011)
  • Author(s): 関澤彩眞, 後藤慎介, 中嶋康裕
  • Organizer: 第30回日本動物行動学会
  • Place of Presentation: 慶應義塾大学
• [Presentation] ペニスを自切・補充するウミウシはどれくらいいるのか? (2011)
  • Author(s): 関澤彩眞, 志賀向子, 山梨津乃, 宮島瞳, 中嶋康裕
  • Organizer: 第30回日本動物行動学会
  • Place of Presentation: 慶應義塾大学
• [Presentation] ペニスを自切・補充するウミウシとしないウミウシ (2011)
  • Author(s): 関澤彩眞, 志賀向子, 中嶋康裕
  • Organizer: 第82回日本動物学会旭川大会
  • Place of Presentation: 旭川市大雪クリスタルホール
• [Presentation] Replenishment mechanism of disposable penes in a sea slug Chromodorie tinctoria. (2010)
  • Author(s): Sekizawa A., Shiga S., Nakashima Y.
  • Organizer: 17th International Congress of Malacology
  • Place of Presentation: Phuket, Thailand
  • Year and Date: 2010-07-19
• [Presentation] リアクション学者だった日高敏隆. (2010)
  • Author(s): 中嶋康裕
  • Organizer: 日本動物行動学会第29回大会ラウンドテーブル「Both Sides of Toshi(日高行動学の光と陰)」
  • Place of Presentation: 沖縄県男女共同参画センターてぃるる,沖縄県那覇市
• [Presentation] ペニスを使い捨てするウミウシとしないウミウシはどこが違うのか? (2010)
  • Author(s): 関澤彩眞,志賀向子,中嶋康裕
  • Organizer: 日本動物行動学会第29回大会
  • Place of Presentation: 沖縄県男女共同参画センターてぃるる,沖縄県那覇市
• [Presentation] How does a sea slug, Chromodoris tinctoria, replenish disposable penes? (2010)
  • Author(s): Sekizawa A., Shiga S., Nakashima Y.
  • Organizer: 13th International Behavioral Ecology Congress
  • Place of Presentation: Perth, Australia.
• [Presentation] Bi-directional sex change in a marine goby: Effects of social change and life history. (2010)
  • Author(s): SawadaK.,Kutsukake N.,Hiraiwa-Hasegawa M., Nakashima Y.
  • Organizer: 13th International Behavioral Ecology Congress
  • Place of Presentation: Perth, Australia.
• [Presentation] Replenishment mechanism of disposable penes in a sea slug Chromodoris tinctoria. (2010)
  • Author(s): Sekizawa A., Shiga S., Nakashima Y.
  • Organizer: 17th International Congress of Malacology "Reproduction and Mating Systems in Hermaphroditic Molluscs
  • Place of Presentation: Phuket, Thailand.
• [Presentation] How does a sea slug, Chromodoris tinctoria, replenish disposable penes? (2010)
  • Author(s): Sekizawa A., Shiga S., Nakashima Y.
  • Organizer: 13th International Behavioral Ecology Congress
  • Place of Presentation: Perth, Australia
• [Presentation] Bi-directional sex change in a marine goby : Effects of social change and life history. (2010)
  • Author(s): Sawada K., Kutsukake N., Hiraiwa-Hasegawa M., Nakashima Y.
  • Organizer: 13th International Behavioral Ecology Congress
  • Place of Presentation: Perth, Australia
• [Presentation] ペニスを使い捨てするウミウシとしないウミウシはどこが違うのか? (2010)
  • Author(s): 関澤彩眞, 志賀向子, 中嶋康裕
  • Organizer: 日本動物行動学会第29回大会
  • Place of Presentation: 沖縄県男女共同参画センター
• [Remarks] 日本語サイトでの紹介朝日新聞(本紙にも掲載)
  • URL: http://www.asahi.com/tech_science/update/0219/TKY201302180425.html
• [Remarks] 毎日新聞(本紙にも掲載)
  • URL: http://mainichi.jp/select/news/20130221k0000e040166000c.html
• [Remarks] AFP(日本語版)
  • URL: http://www.afpbb.com/article/environment-science-it/science-technology/2927794/10277116
• [Remarks] 大阪市大
  • URL: http://www.osaka-cu.ac.jp/ja/news/2012/ldvpq8
• [Remarks] ナショナル・ジオグラフィック
  • URL: http://www.nationalgeographic.co.jp/news/news_article.php?file_id=00020130226001
• [Remarks] Science
  • URL: http://news.sciencemag.org/sciencenow/2013/02/scienceshot-sea-slug-sports-deta.html?ref=hp
• [Remarks] Nature
  • URL: http://www.nature.com/news/sea-slug-loses-penis-after-sex-but-grows-another-the-next-day-1.12421
• [Remarks] Discovery channel
  • URL: http://news.discovery.com/animals/sea-slug-has-disposable-penis-130211.htm
• [Remarks] Smithsonian
  • URL: http://blogs.smithsonianmag.com/science/2013/02/this-sea-slug-discards-its-penis-after-sex-and-grows-another/
• [Remarks] Science News
  • URL: http://www.sciencenews.org/view/generic/id/348271/description/Sea_slug_carries_disposable_penis_plus_spares
• [Remarks] Live Science
  • URL: http://www.livescience.com/27065-sea-slug-uses-disposable-penis.html
• [Remarks] New Scientist
  • URL: http://www.newscientist.com/blogs/shortsharpscience/2013/02/sea-slug-penis.html
• [Remarks] National Geographic by Jane J. Lee
  • URL: http://newswatch.nationalgeographic.com/2013/02/13/sea-slug-regrow-penis-animal-behavior-science/
• [Remarks] National Geographic by Ed Yong
  • URL: http://phenomena.nationalgeographic.com/2013/02/12/sea-slug-amputates-its-disposable-penis-but-has-two-spares/
• [Remarks] The Scientist
  • URL: http://www.the-scientist.com/?articles.view/articleNo/34378/title/The-Detachable-Penis/
• [Remarks] Richard Dawkins Foundation
  • URL: http://www.richarddawkins.net/news_articles/2013/2/17/sea-slug-has-disposable-penis
• [Remarks] Science World Report 2.13
  • URL: http://www.scienceworldreport.com/articles/4924/20130213/sea-slug-owns-a-disposable-penis.htm
• [Remarks] BBC
  • URL: http://www.bbc.co.uk/news/science-environment-21431678
• [Remarks] CBC News(Canada)
  • URL: http://www.cbc.ca/news/technology/story/2013/02/13/science-sea-slug-disposable-penis.html
• [Remarks] CBS News 2.14
  • URL: http://www.cbsnews.com/8301-205_162-57569452/bizarre-sea-slug-discovered-with-a-disposable-penis/
• [Remarks] ABC
  • URL: http://www.abc.net.au/science/articles/2013/02/13/3689680.htm?topic=enviro
• [Remarks] NBC Science news
  • URL: http://science.nbcnews.com/_news/2013/02/12/16941698-hermaphrodite-sea-slug-mates-with-throwaway-penis?lite
• [Remarks] MACLEANS (California)
  • URL: http://www.abc.net.au/science/articles/2013/02/13/3689680.htm?topic=enviro
• [Remarks] Fox News
  • URL: http://www.foxnews.com/science/2013/02/12/hermaphrodite-sea-slug-mates-with-throwaway-penis/
• [Remarks] AOL
  • URL: http://www.aol.co.uk/video/sea-slug-has-detachable-penis/517671557/statesman.com
• [Remarks] French Tribune 2.15
  • URL: http://frenchtribune.com/teneur/1316011-these-sea-slug-species-can-detach-re-grow-and-re-use-their-penis
• [Remarks] Today
  • URL: http://www.todayonline.com/daily-focus/science/sea-slug-which-loses-penis-after-sex-discovered