The Reproductive Cycle of the Sea Cucumber <I>Holothuria scabra</I> around Shioya Fishing Port, Okinawa Prefecture

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  • Minami Yoichi
    Okinawa Prefectural Fisheries Research and Extension Center Present address: Ishigaki Branch, Okinawa Prefectural Fisheries Research and Extension Center
  • Yoshikuni Michiyasu
    Fishery Research Laboratory, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University

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Other Title
  • 沖縄県塩屋漁港周辺のハネジナマコの生殖周期
  • オキナワケン シオヤ ギョコウ シュウヘン ノ ハネジナマコ ノ セイショク シュウキ

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Abstract

The sea cucumber Holothuria scabra is widely distributed in narrow waters in the tropical and subtropical Indo-Pacific and is an economically important species. The reproductive biology of this species around Shioya Fishing Port, Okinawa Prefecture was investigated from September 2010 to September 2011. Maturity was evaluated monthly in both sexes using the gonad-somatic index, and oocyte size and the histological features of the ovaries were also examined in females. We concluded from annual transitions in these indicators that H. scabra spawned primarily between May and October in 2011, and that individuals smaller than 600 g in body weight were sexually immature.

Journal

  • Aquaculture Science

    Aquaculture Science 62 (3), 235-242, 2014

    Japanese Society for Aquaculture Science

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