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2020 Fiscal Year Annual Research Report

Adaptive evolution of invertebrates to various salt concentration environments using pontogeneiid amphipods

Research Project

Project/Area Number 17K15174
Research InstitutionHiroshima University

Principal Investigator

富川 光  広島大学, 人間社会科学研究科(教), 准教授 (70452597)

Project Period (FY) 2017-04-01 – 2021-03-31
Keywords分類学的検討 / 種多様性 / 分子系統解析
Outline of Annual Research Achievements

本研究の目的は,アゴナガヨコエビ科甲殻類を用いて,水生無脊椎動物の多様な塩濃度環境への適応放散過程を解明することである.しかし,アゴナガヨコエビ科は種多様性が十分に明らかではなく,種間の系統関係も不明であった.そこで,昨年度までは淡水・汽水・海域のさまざまな環境でサンプリングを実施し,多様な環境における種多様性の解明と系統関係の推定を行ってきた.
最終年度である今年度は,まず不足していた分類群のサンプリングを行った.サンプリングは洞窟内の地下水や潮間帯を中心に実施し,アワヨコエビ属やアゴナガヨコエビ属について多数の種を得ることができた.得られたサンプルの形態観察および分子系統解析を行ない,分類学的位置や系統関係を明らかにした.また,アゴナガヨコエビ科との比較検討のために,アゴナガヨコエビ科のサンプリングで同時に得られたスンナリヨコエビ科やメクラヨコエビ科などの種についても分類学的検討と分子系統解析を行ない,記載論文を発表した.さらに,研究協力者から提供された深海域(ベーリング海およびマリアナ海溝)に生息するPardaliscidae科の複数種についても研究を行ない,アゴナガヨコエビ科との比較・検討と記載論文の公表を行った.
これまでの研究により得られた分類学的・系統学的研究成果に基づいて,アゴナガヨコエビ科の多様な塩濃度環境への適応放散に関する考察と議論を行った.これらの成果については,現在論文として公表準備中である.

  • Research Products

    (14 results)

All 2021 2020

All Journal Article (13 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 13 results) Book (1 results)

  • [Journal Article] Molecular phylogenetic position of Minamitalitrus zoltani elucidates a further troglobisation pattern in cave-dwelling terrestrial amphipods (Crustacea: Talitridae)2021

    • Author(s)
      Takahashi Tomoyuki、Morino Hiroshi、Tomikawa Ko、Lai Yi-Te、Nakano Takafumi
    • Journal Title

      Molecular Phylogenetics and Evolution

      Volume: 154 Pages: 106984~106984

    • DOI

      10.1016/j.ympev.2020.106984

    • Peer Reviewed
  • [Journal Article] A new species of Princaxelia from Shinkai Seep Field, Mariana Trench (Crustacea, Amphipoda, Pardaliscidae)2021

    • Author(s)
      Tomikawa Ko、Watanabe Hiromi Kayama、Tanaka Katsuhiko、Ohara Yasuhiko
    • Journal Title

      ZooKeys

      Volume: 1015 Pages: 115~127

    • DOI

      10.3897/zookeys.1015.59683

    • Peer Reviewed
  • [Journal Article] A new species of the genus Rhachotropis from off Amamioshima Island, northwestern Pacific (Crustacea: Amphipoda: Eusiridae)2020

    • Author(s)
      OKAZAKI MASAKUNI、OHTSUKA SUSUMU、TOMIKAWA KO
    • Journal Title

      Zootaxa

      Volume: 4750 Pages: 182~190

    • DOI

      10.11646/zootaxa.4750.2.2

    • Peer Reviewed
  • [Journal Article] A new species of Calliopius (Crustacea: Amphipoda: Calliopiidae) from Japan2020

    • Author(s)
      Shimoji Ryuma、Nakano Takafumi、Tomikawa Ko
    • Journal Title

      Proceedings of the Biological Society of Washington

      Volume: 133 Pages: 7~7

    • DOI

      10.2988/20-00001

    • Peer Reviewed
  • [Journal Article] Redescription of the freshwater calanoid copepod Neutrodiaptomus formosus with key to females of diaptomid species in Japan2020

    • Author(s)
      Ueda Hiroshi、Tomikawa Ko、Ohtsuka Susumu
    • Journal Title

      Plankton and Benthos Research

      Volume: 15 Pages: 178~184

    • DOI

      10.3800/pbr.15.178

    • Peer Reviewed
  • [Journal Article] A new species of Nicippe from the Bering Sea (Crustacea, Amphipoda, Pardaliscidae), with a redescription of N. tumida2020

    • Author(s)
      Tomikawa Ko、Kakui Keiichi、Fujiwara Yoshihiro
    • Journal Title

      ZooKeys

      Volume: 965 Pages: 37~53

    • DOI

      10.3897/zookeys.965.51749

    • Peer Reviewed
  • [Journal Article] Environmental DNA reveals cryptic diversity within the subterranean amphipod genus Pseudocrangonyx Akatsuka & Komai, 1922 (Amphipoda: Crangonyctoidea: Pseudocrangonyctidae) from central Japan2020

    • Author(s)
      Yonezawa Satoru、Nakano Takafumi、Nakahama Naoyuki、Tomikawa Ko、Isagi Yuji
    • Journal Title

      Journal of Crustacean Biology

      Volume: 40 Pages: 479~483

    • DOI

      10.1093/jcbiol/ruaa028

    • Peer Reviewed
  • [Journal Article] A new species of Paramoera (Crustacea: Amphipoda: Pontogeneiidae) from an estuary habitat in Hokkaido, Japan2020

    • Author(s)
      Hagihara Kumiko、Nakano Takafumi、Tomikawa Ko
    • Journal Title

      Journal of Natural History

      Volume: 54 Pages: 1279~1292

    • DOI

      10.1080/00222933.2020.1785031

    • Peer Reviewed
  • [Journal Article] The complete mitochondrial genome of Jesogammarus (Jesogammarus) hinumensis (Crustacea: Amphipoda: Anisogammaridae)2020

    • Author(s)
      Lee Chi-Woo、Tomikawa Ko、Min Gi-Sik
    • Journal Title

      Mitochondrial DNA Part B

      Volume: 5 Pages: 2436~2437

    • DOI

      10.1080/23802359.2020.1775520

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Complete mitochondrial genome of Pseudocrangonyx joolaei (Crustacea: Amphipoda: Pseudocrangonyctidae)2020

    • Author(s)
      Lee Chi-Woo、Nakano Takafumi、Tomikawa Ko、Min Gi-Sik
    • Journal Title

      Mitochondrial DNA Part B

      Volume: 5 Pages: 3029~3030

    • DOI

      10.1080/23802359.2020.1797592

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A new cave amphipod, Pseudocrangonyx wonkimi sp. nov. (Crustacea, Amphipoda, Pseudocrangonyctidae), from the Korean Peninsula2020

    • Author(s)
      Lee Chi-Woo、Tomikawa Ko、Min Gi-Sik
    • Journal Title

      ZooKeys

      Volume: 960 Pages: 1~15

    • DOI

      10.3897/zookeys.960.53564

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Species of the Maera-clade collected from Japan. Part 4: addenda to genera Maera Leach, 1814 and Quadrimaera Krapp-Schickel & Ruffo, 2000, with revised keys to Japanese species of the clade (Crustacea: Amphipoda: Maeridae)2020

    • Author(s)
      ARIYAMA HIROYUKI、KODAMA MASAFUMI、TOMIKAWA KO
    • Journal Title

      Zootaxa

      Volume: 4885 Pages: 336~352

    • DOI

      10.11646/zootaxa.4885.3.2

    • Peer Reviewed
  • [Journal Article] A new species of the genus Pseudocrangonyx (Crustacea: Amphipoda: Pseudocrangonyctidae) from Simbok Cave, Korea2020

    • Author(s)
      LEE CHI-WOO、TOMIKAWA KO、NAKANO TAKAFUMI、MIN GI-SIK
    • Journal Title

      Zootaxa

      Volume: 4731 Pages: 321~334

    • DOI

      10.11646/zootaxa.4731.3.2

    • Peer Reviewed / Int'l Joint Research
  • [Book] 動物の事典2020

    • Author(s)
      富川光(末光隆志ほか編)
    • Total Pages
      772
    • Publisher
      朝倉書店
    • ISBN
      978-4-254-17166-2

URL: 

Published: 2021-12-27  

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