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Diversity and evolution of extremely progenetic gobioid fishes of the family Syndleriidae.

Research Project

Project/Area Number 16570082
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Biodiversity/Systematics
Research InstitutionUniversity of the Ryukyus

Principal Investigator

YOSHINO Tetsuo  University of the Ryukyus, Department of Chemistry, Biology and Marine Science, Faculty of Science, Associate Professor, 理学部, 助教授 (50117595)

Project Period (FY) 2004 – 2006
Project Status Completed (Fiscal Year 2006)
Budget Amount *help
¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 2006: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2005: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2004: ¥1,700,000 (Direct Cost: ¥1,700,000)
KeywordsSchindler idae / Gobioidei / taxonomy / tropical coastal fishes / progenesis / new species description / 16S rRNA / molecular phylogeny / 再記載 / シンタイプ
Research Abstract

Schindleria (Gobioidei, Schindleriidae), believed to include one of the smallest and youngest reproducing vertebrates, is broadly distributed in the Indo-Pacific Oceans, inhabiting coral reef lagoons. They are all characterized by a reduced larval-like form, such as aslender translucent and scaleless body. The three nominal species recognized in the genus to date have been distinguished by only combination of dorsal and anal fin-ray counts, and the existence of some undescribed species has been suggested in Schindleria; thus a total picture of species composition of the genus is poorly known. Towards the disclosure of diversity of Schindleria, a molecular phylogenetic analysis using partial mitochondrial 16S rRNA sequences was conducted for specimens from the Ryukyu and Ogasawara Islands, Japan. This analysis showed clearly that as many as 21 genetically distinguishable species occurred within the geographical areas. The degree of species crypticness of "S. praematura" [15.0 = 15 (new cryptic species + known species)/1 (known species)] is higher than the values of well-known animal examples, such as the pan-mesopelagic bristlemouth fish Cyclothone alba (5.0) and the South American skipper butterfly Astraptes fulgerator (10.0). This discovery of many cryptic species in Schindleria suggests that the use of DNA sequences is necessary for species identification of such morphologically conserved taxa. Because molecular analyses should increase the number of hitherto unnamed and pseudonymous species, especially in tropical areas, it is proposed that DNA-based designation is necessary for such taxa in order to compile the full "species lists", although there is presently no consensus for the inclusion of DNA sequencing data in the formal descriptions of new species.

Report

(4 results)
  • 2006 Annual Research Report   Final Research Report Summary
  • 2005 Annual Research Report
  • 2004 Annual Research Report
  • Research Products

    (6 results)

All 2007 2006 2005

All Journal Article (6 results)

  • [Journal Article] DNA sequences identify numerous cryptic species of the vertebrate : A lesson from the gobioid fish Schindleria2007

    • Author(s)
      Kon, T., T.Yoshino, T.Mukai, M.Nishida
    • Journal Title

      Molecular Phylogenetics and Evolution 44

      Pages: 53-62

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] DNA sequences identify numerous cryptic species of the vertebrate : A lesson from the gobioid fish Schindleria2007

    • Author(s)
      Kon, T., Y.Yoshino, T.Mukai, M.Nishida
    • Journal Title

      Molecular Phylogenetics and Evolution 44

      Pages: 53-62

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] DNA sequences identify numerous cryptic species of the vertebrate : A lesson from the gobioid fish Schindleria2007

    • Author(s)
      Kon, T, Yoshino, M. Nishida
    • Journal Title

      Molecular Phylogenetics and Evolution 42(accepted)

    • Related Report
      2006 Annual Research Report
  • [Journal Article] DNA sequences discover numerous cryptic sympatric species of the most ephemeral vertebrate Schindleria (Pisces : Schindleriidae)2006

    • Author(s)
      Kon, T., T.Yoshino, T.Mukai, M.Nishida
    • Journal Title

      Proceedings of the National Academy of Sciences of the United States of America 104(accepted)

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Reexamination of the syntype series of two Schindleria species described by Schindler deposited at Naturhistorishes Museum, Wien.2005

    • Author(s)
      Yoshino T., T.Kon
    • Journal Title

      The Ruffles Bulletin of Zoology 53(in press)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Molecular phylogeny and genetic population structure of the Extremely progenetic gobioids Schindleria in Japan.2005

    • Author(s)
      Kon T., M.Nishida, T.Yoshino
    • Journal Title

      Evolution 60(in press)

    • Related Report
      2004 Annual Research Report

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Published: 2004-04-01   Modified: 2016-04-21  

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