Arm damage and regeneration of Tropiometra afra macrodiscus (Echinodermata: Crinoidea) in Sagami Bay, central Japan

R. Mizui, T. Kikuchi

    Abstract

    A natural population of the comatulid crinoid Tropiometra afra macrodiscus was monitored in Sagami Bay, central Japan. Serious damage to the arms of these crinoids was observed after a strong typhoon struck Sagami Bay. A rapid regeneration rate of 17.6 cm year-1 was observed among these crinoids. This rate was more than twice the value of the normal growth rate (8.1 cm year-1). Microscopic observations revealed that only 20% of breakages had occurred at syzygial articulations. The pattern of arm loss was obviously different from that caused by predator attacks in other autotomic species. A negative relationship was observed between the length of stumps and that of regeneration. Our results suggest that T. a. macrodiscus controls the rate of regeneration of each arm in order to maintain efficient feeding and for rapid recovery of reproductive ability. © 2013 Taylor & Francis Group.

    Original languageEnglish
    Title of host publicationEchinoderms in a Changing World - Proceedings of the 13th International Echinoderm Conference, IEC 2009
    Pages119-124
    Number of pages6
    StatePublished - 2013 Jan 1
    Event13th International Echinoderm Conference, IEC 2009 - Hobart, TAS, Australia

    Other

    Other13th International Echinoderm Conference, IEC 2009
    CountryAustralia
    CityHobart, TAS
    Period09/1/509/1/9

    Fingerprint

    regeneration
    damage
    typhoon
    breakage
    predator

    ASJC Scopus subject areas

    • Palaeontology

    Cite this

    Mizui, R., & Kikuchi, T. (2013). Arm damage and regeneration of Tropiometra afra macrodiscus (Echinodermata: Crinoidea) in Sagami Bay, central Japan. In Echinoderms in a Changing World - Proceedings of the 13th International Echinoderm Conference, IEC 2009. (pp. 119-124)

    Arm damage and regeneration of Tropiometra afra macrodiscus (Echinodermata : Crinoidea) in Sagami Bay, central Japan. / Mizui, R.; Kikuchi, T.

    Echinoderms in a Changing World - Proceedings of the 13th International Echinoderm Conference, IEC 2009. 2013. p. 119-124.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Mizui, R & Kikuchi, T 2013, Arm damage and regeneration of Tropiometra afra macrodiscus (Echinodermata: Crinoidea) in Sagami Bay, central Japan. in Echinoderms in a Changing World - Proceedings of the 13th International Echinoderm Conference, IEC 2009. pp. 119-124, 13th International Echinoderm Conference, IEC 2009, Hobart, TAS, Australia, 5-9 January.
    Mizui R, Kikuchi T. Arm damage and regeneration of Tropiometra afra macrodiscus (Echinodermata: Crinoidea) in Sagami Bay, central Japan. In Echinoderms in a Changing World - Proceedings of the 13th International Echinoderm Conference, IEC 2009. 2013. p. 119-124.

    Mizui, R.; Kikuchi, T. / Arm damage and regeneration of Tropiometra afra macrodiscus (Echinodermata : Crinoidea) in Sagami Bay, central Japan.

    Echinoderms in a Changing World - Proceedings of the 13th International Echinoderm Conference, IEC 2009. 2013. p. 119-124.

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

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