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    Discovery of dense aggregations of stalked crinoids in Izu-Ogasawara trench, Japan

    Access Status
    Fulltext not available
    Authors
    Oji, T.
    Ogawa, Y.
    Hunter, Aaron
    Kitazawa, K.
    Date
    2009
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Oji, T. and Ogawa, Y. and Hunter, A. and Kitazawa, K. 2009. Discovery of dense aggregations of stalked crinoids in Izu-Ogasawara trench, Japan. Zoological Science. 26 (6): pp. 406-408.
    Source Title
    Zoological Science
    DOI
    10.2108/zsj.26.406
    ISSN
    0289-0003
    School
    Department of Applied Geology
    URI
    http://hdl.handle.net/20.500.11937/45854
    Collection
    • Curtin Research Publications
    Abstract

    Stalked crinoids are recognized as living fossils that typically inhabit modern deep-water environments exceeding 100 m. Previous records of stalked crinoids from hadal depths (exceeding 6000 m) are extremely rare, and no in-situ information has been available. We show here that stalked crinoids live densely on rocky substrates at depths over 9000 m in the Izu-Ogasawara Trench off the eastern coast of Japan, evidenced by underwater photos and videos taken by a remotely operated vehicle. This is the deepest in-situ observation of stalked crinoids and demonstrates that crinoid meadows can exist at hadal depths close to the deepest ocean floor, in a fashion quite similar to populations observed in shallower depths. ©2009 Zoological Society of Japan.

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