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Evolution of submarine cave molluscs

Research Project

Project/Area Number 04454032
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field Stratigraphy/Paleontology
Research InstitutionFaculty of Science, Kanagawa University (1994)
The University of Tokyo (1992-1993)

Principal Investigator

HAYAMI Itaru  Kanagawa Univ.Professor, 理学部, 教授 (80037184)

Co-Investigator(Kenkyū-buntansha) KASE Tomoki  National Science Mus.Head of Office, 地学研究部, 室長 (20124183)
遠藤 一佳  東京大学, 大学院・理学系研究科, 助手 (80251411)
大路 樹生  東京大学, 大学院・理学系研究科, 講師 (50160487)
棚部 一成  東京大学, 大学院・理学系研究科, 教授 (20108640)
阿部 勝巳  東京大学, 理学部, 助手 (80151091)
Project Period (FY) 1992 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥4,500,000 (Direct Cost: ¥4,500,000)
Fiscal Year 1994: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1993: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1992: ¥2,100,000 (Direct Cost: ¥2,100,000)
Keywordssubmarine caves / molluscs / diversity / paedomorphosis / K-strategy / evolutionary biology / biogeography / 二枚貝類 / 遺存種 / 矮小化 / 繁殖戰略 / 適応戰略 / 幼形化 / 捕食圧
Research Abstract

The present study has been continued since 1992 in order to clarify the characteristics of diversity and life history of cryptic molluscs in submarine caves around coral reefs as well as their evolutionary signifcance. With assistance of skillful divers we surveyed the biota of many caves in Okinawa, Miyako, Yonaguni and Bonin Islands. Materials from the Philippines, Palau and various localities of Japan are also compared.
As the result the following common features are found in cavernicolous bivalves : 1) Most bivalves are very small in size, 2) Many species are defenseless against predators (ecologically primitive) ; some species can be regarded as "living fossils", 3) Cave bivalves are mostly undescribed and include many species referable to deep-water genera, 4) Many species show paedomorphosis (progenesis), 5) Non-planktotrophic species is unusually common like deep-water and arctic bivalves, 6) Many species are characterized by huge prodissoconch I,suggesting large egg size and K-strategy, 7) Some species may be endemic to particular caves, but widely distributed species in the western Pacific are common in spite of their non-planktotrophic larvae.
These features are interpreted as due to the adaptation to low predation pressure and poor nutrition in such caves. We already published the systematic description of bivalves from Ryukyu and some discussion about their evolutionary significance.

Report

(4 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • 1992 Annual Research Report
  • Research Products

    (21 results)

All Other

All Publications (21 results)

  • [Publications] 速水格: "ツキヒガイの内肋" 日本貝類学会「ちりぼたん」. 25. 7-9 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 速水格・加瀬友喜: "進化学的にみた海底洞窟の動物群" 科学. 64. 561-569 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 加瀬友喜・速水格: "海底洞窟中の軟体動物群の原始性" 化石. 57号. 31-36 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Kase,T.: "Limpet home depressions in Cretaceous ammonites" Lethaia. 27. 49-58 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Hayami,I.and Kase,T: "A new cryptic species of Pycnodonte from Ryukyu lslands:a living fossil oyster" Trans,Proc.Palaeont.Soc.Japan. 165. 1070-1089 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Hayami,I.and Kase,T.: "Submarine cave Bivalvia from the Ryukyu lslands:systematic and evolutionary significance" 東京大学出版会, 133 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Hayami, I.: "Internal ribs of Amusium. [in Japanese]" Japan.Malacol.Soc."Chiribotan". 25. 7-9 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Hayami, I.and Kase, T.: "Submarine cave fauna as viewed from evolutionary biology. [in Japanese]" Kagaku (Science). 64. 561-569 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Kase, T.and Hayami, I.: "Primitiveness of submarine cave mollusks. [in Japanese]" Kaseki (The Fossils). 57. 31-36 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Kase, T.: "Limpet home depressions in Cretaceous ammonites." Lethaia. 27. 49-58 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Hayami, I.and Kase, T.: "A new cryptic species of Pycnodonte from Ryukyu Islands : a living fossil oyster." Trans.Proc.Palaeont.Soc.Japan. 165. 1070-1089 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Hayami, I.and Kase, T.: Submarine cave Bivalvia from the Ryukyu Islands : systematics and evolutionary significance.Univ.Tokyo Press, 133 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 速水格: "ツキヒガイの内肋" 日本貝類学会「ちりぼたん」. 25. 7-9 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 速水格: "進化学的にみた海底洞窟の動物群" 科学. 64. 561-569 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 加瀬友喜: "海底洞窟中の軟体動物群の原始性" 化石. 57号. 31-36 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Kase,T.: "Limpet home depressions in Cretaceous ammonites" Lethaia. 27. 49-58 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Hayami,Itaru: "A new cryptic species of Pycnodonte from Ryukyu Islands: a living fossil oyster" Trans.Proc.Palaeont.Soc.Japan. 165. 1070-1089 (1992)

    • Related Report
      1993 Annual Research Report
  • [Publications] Kase,Tomoki: "Unique submarine cave mollusc fauna: composition,origin and adaptation" Journal of Molluscan Studies. 58. 446-449 (1992)

    • Related Report
      1993 Annual Research Report
  • [Publications] Hayami,Itaru: "Submarine cave Bivalvia from the Ryukyu Islands: systematics and evolutionary significance" Bull.Univ.Mus.Univ.Tokyo. 35. 1-133 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Hayami,I.: "A new cryptic species of Pycnodonte from Ryukyu Islands: a living fossil oyster" Transactions and Proceedings of the Palaeontological Society of Japan. 165. 1070-1089 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] Kase,T.: "Unique submarine cave mollusc fauna:composition, origin and adaptation" Journal of Molluscan Studies. 58. 446-449 (1992)

    • Related Report
      1992 Annual Research Report

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Published: 1992-04-01   Modified: 2016-04-21  

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