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Evolution of swimming dwarf males in small benthic crustaceans

Research Project

Project/Area Number 19K06800
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 45030:Biodiversity and systematics-related
Research InstitutionHokkaido University

Principal Investigator

Kakui Keiichi  北海道大学, 理学研究院, 講師 (70723360)

Co-Investigator(Kenkyū-buntansha) 蛭田 千鶴江  北海道大学, 理学研究院, 特別研究員(RPD) (20723018)
Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords甲殻類 / 矮雄 / 系統進化 / タナイス / 分類 / 性表現
Outline of Research at the Start

本研究は,タナイス目甲殻類で見出された「雌雄ともに生涯を通じて分散能力がとても低い動物群による矮雄(メスの体サイズの半分以下しかない小さなオス)の獲得」という現象について,分類学的,系統学的,形態学的アプローチからその進化史を明らかにしようとするものです.本研究を通して,タナイス目のみならず動物全体における矮雄の獲得と進化に関する理解を深めることを目指しています.

Outline of Final Research Achievements

This project aims to illustrate how tanaidaceans obtained the dwarf males. Through taxonomical, phylogenetical, and morphological approaches and rearing experiments, this project provided a robust phylogenetic tree for Tanaidacea, described several new species, and illustrated sexual and reproductive aspects of several tanaidaceans, suggesting that dwarf males may be produced by simpler developmental pathways than expected.

Academic Significance and Societal Importance of the Research Achievements

矮小なオス,つまり矮雄は様々な動物群で知られるが,タナイス類の矮雄は,雌雄ともに生涯を通じて分散能力がとても低い動物群における矮雄の例として興味深い存在である.本研究期間中,分類学的,系統学的,形態学的研究,飼育実験を実施した.その結果,タナイス目内の高次分類群間の信頼性の高い系統樹を作成したほか,複数の未記載種と複数種の性表現に関する記載を行い,タナイス目における矮雄が,従来考えられていたほど特殊な発生経路を経ない可能性があることを明らかにした.

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (25 results)

All 2024 2023 2022 2021 2020 2019

All Journal Article (20 results) (of which Peer Reviewed: 19 results,  Open Access: 20 results) Presentation (5 results) (of which Int'l Joint Research: 1 results,  Invited: 2 results)

  • [Journal Article] Flatworm cocoons in the abyss: same plan under pressure2024

    • Author(s)
      Kakui Keiichi、Tsuyuki Aoi
    • Journal Title

      Biology Letters

      Volume: 20 Issue: 1 Pages: 20230506-20230506

    • DOI

      10.1098/rsbl.2023.0506

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A smaller species releases proportionally larger juveniles in Apseudes (Crustacea: Peracarida: Tanaidacea)2024

    • Author(s)
      Kakui Keiichi、Hiruta Chizue
    • Journal Title

      CBM-Cahiers de Biologie Marine

      Volume: 65 Pages: 35-37

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A new parasitic barnacle (Crustacea, Cirripedia, Rhizocephala, Mycetomorpha) from the abyssal zone in the northwestern Pacific2024

    • Author(s)
      Kakui Keiichi
    • Journal Title

      Zoosystematics and Evolution

      Volume: 100 Issue: 2 Pages: 385-390

    • DOI

      10.3897/zse.100.120887

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Apseudes ranma sp. nov. (Tanaidacea: Apseudidae) found in a public aquarium, with notes on phylogeny and a presumptive stridulatory organ2024

    • Author(s)
      Matsushima Yoshinobu、Kakui Keiichi
    • Journal Title

      Bulletin of Marine Science

      Volume: 100 Issue: 3 Pages: 451-470

    • DOI

      10.5343/bms.2024.0030

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Diexanthema hakuhomaruae sp. nov. (Copepoda: Siphonostomatoida: Nicothoidae) from the Hadal Zone in the Northwestern Pacific, with an 18S Molecular Phylogeny2023

    • Author(s)
      Kakui Keiichi、Fukuchi Jun、Ohta Mizuki
    • Journal Title

      Acta Parasitologica

      Volume: - Issue: 2 Pages: 413-419

    • DOI

      10.1007/s11686-023-00676-z

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Differential masculinization of the chelipeds in two simultaneously hermaphroditic Apseudes tanaidaceans (Crustacea: Malacostraca)2023

    • Author(s)
      Kakui Keiichi、Hiruta Chizue
    • Journal Title

      Zoologischer Anzeiger

      Volume: 305 Pages: 23-27

    • DOI

      10.1016/j.jcz.2023.05.004

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Two new species in Leptocheliidae (Crustacea: Peracarida: Tanaidacea) from Japan, with notes on their phylogenetic position and aspects of morphology2023

    • Author(s)
      Sato Akari、Arakawa Kazuharu、Kakui Keiichi
    • Journal Title

      Zoologischer Anzeiger

      Volume: 306 Pages: 51-68

    • DOI

      10.1016/j.jcz.2023.06.006

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A new brackish tanaidacean, Sinelobus kisui sp. nov. (Crustacea, Peracarida, Tanaidacea), from Japan, with a key to Sinelobus species and barcode information from two loci2022

    • Author(s)
      Kyoko Hirano, Keiichi Kakui
    • Journal Title

      Zoosystematics and Evolution

      Volume: 98 Issue: 2 Pages: 245-256

    • DOI

      10.3897/zse.98.84818

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Integrative taxonomy of Zeuxo (Crustacea: Peracarida: Tanaidacea) from Japan, with the description of a new species2022

    • Author(s)
      Nobuya Okamoto, Keiichi Kakui
    • Journal Title

      Biologia

      Volume: 77 Issue: 9 Pages: 2497-2506

    • DOI

      10.1007/s11756-022-01121-8

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Protogynous hermaphroditism in Crustacea: a new example from Tanaidacea2022

    • Author(s)
      Keiichi Kakui, Chizue Hiruta
    • Journal Title

      Canadian Journal of Zoology

      Volume: 100 Issue: 8 Pages: 481-487

    • DOI

      10.1139/cjz-2022-0033

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Observations on Predation in Paranthura japonica Richardson, 1909 (Isopoda: Cymothoida: Paranthuridae)2022

    • Author(s)
      Shiraki Shoki、Kakui Keiichi
    • Journal Title

      Zoological Science

      Volume: 39 Issue: 3

    • DOI

      10.2108/zs210122

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Description of a New Hamatipeda Species, with an 18S Molecular Phylogeny (Crustacea: Tanaidacea: Typhlotanaidae)2021

    • Author(s)
      Kakui Keiichi、Hiruta Chizue
    • Journal Title

      Zoological Science

      Volume: 39 Issue: 1 Pages: 140-146

    • DOI

      10.2108/zs210065

    • NAID

      210000186932

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Comprehensive Transcriptome Sequencing of Tanaidacea with Proteomic Evidences for Their Silk2021

    • Author(s)
      Kakui Keiichi、Fleming James F、Mori Masaru、Fujiwara Yoshihiro、Arakawa Kazuharu
    • Journal Title

      Genome Biology and Evolution

      Volume: 13 Issue: 12

    • DOI

      10.1093/gbe/evab281

    • NAID

      120007182914

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Presumptive stridulatory organs in Paranthura cf. japonica Richardson, 1909 (Isopoda: Cymothoida: Paranthuridae)2021

    • Author(s)
      Kakui Keiichi、Shiraki Shoki
    • Journal Title

      Journal of Crustacean Biology

      Volume: 41 Issue: 2

    • DOI

      10.1093/jcbiol/ruab026

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Tube-constructing paratanaoidean tanaidaceans (Crustacea: Peracarida): a brief review2021

    • Author(s)
      Keiichi Kakui
    • Journal Title

      Aquatic Animals

      Volume: AA2021

    • NAID

      120007149270

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] First complete mitochondrial genome of a tanaidacean crustacean (Arctotanais alascensis)2021

    • Author(s)
      Keiichi Kakui, Yasunori Kano
    • Journal Title

      Zoological Science

      Volume: 印刷中 Issue: 3

    • DOI

      10.2108/zs200167

    • NAID

      210000175072

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] A new species of Zeuxo (Crustacea: Peracarida: Tanaidacea) from Japan, with remarks on carapace pigmentation as a potentially useful taxonomic character2020

    • Author(s)
      Nobuya Okamoto, Yuki Oya, Keiichi Kakui
    • Journal Title

      Marine Biology Research

      Volume: 16 Issue: 5 Pages: 411-422

    • DOI

      10.1080/17451000.2020.1766693

    • NAID

      120007173922

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Paradoxapseudes shimojiensis sp. nov. (Crustacea: Tanaidacea: Apseudidae) from a submarine limestone cave in Japan, with notes on its chelipedal morphology and sexual system2020

    • Author(s)
      Keiichi Kakui, Yoshihisa Fujita
    • Journal Title

      Marine Biology Research

      Volume: 16 Issue: 3 Pages: 195-207

    • DOI

      10.1080/17451000.2020.1720249

    • NAID

      120006957262

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] First record of a tanaidacean crustacean fed upon by an arrow worm (Chaetognatha)2020

    • Author(s)
      Keiichi Kakui
    • Journal Title

      Bulletin of the Kitakyushu Museum of Natural History and Human History Series A (Natural History)

      Volume: 18 Pages: 1-4

    • NAID

      130007904856

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 紀伊水道南方海域および熊野灘の深海底生動物相(第2報)2019

    • Author(s)
      木村妙子, 木村昭一, 角井敬知, 波々伯部夏美, 倉持利明, 藤田敏彦, 小川晟人, 小林格, 自見直人, 岡西政典, 山口悠, 広瀬雅人, 吉川晟弘, 福地順, 下村通誉, 柏尾翔, 上野大輔, 藤原恭司, 成瀬貫, 櫛田優花, 喜瀬浩輝, 前川陽一, 中村亨, 奥村順哉, 田中香月
    • Journal Title

      三重大学フィールド研究・技術年報

      Volume: 17 Pages: 1-29

    • NAID

      120006769808

    • Related Report
      2019 Research-status Report
    • Open Access
  • [Presentation] 名古屋港水族館で発見されたApseudes属(甲殻亜門タナイス目アプセウデス科)の分類学的研究2023

    • Author(s)
      松島吉伸, 角井敬知
    • Organizer
      日本動物分類学会第58回大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 甲殻類の多様性と系統2021

    • Author(s)
      角井敬知
    • Organizer
      日本昆虫学会 第81回大会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] タナイス目甲殻類2種における性表現について2020

    • Author(s)
      角井敬知・蛭田千鶴江
    • Organizer
      日本動物学会第91回大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 「常識」を可視化する―分類学者による現象の記載の重要性2019

    • Author(s)
      角井敬知
    • Organizer
      日本動物学会 第90回大会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Diversity of Nesotanais tanaidacean crustaceans in the Ryukyu Islands, Japan2019

    • Author(s)
      Keiichi Kakui, Shinri Tomioka
    • Organizer
      4th Asian Marine Biology Symposium
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2025-01-30  

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