Effect of Continuous Dark Condition on the Growth of the Ecklonia cava Sporophyte

DOI JASI Web Site 15 References
  • NIMURA Kazumi
    Shizuoka Prefectural Fisheries Experiment Station, Suruga-Bay Deep Seawater Aquaculture Research Center
  • TAKASE Susumu
    Shizuoka Prefectural Fisheries Experiment Station, Suruga-Bay Deep Seawater Aquaculture Research Center
  • SHIMAMOTO Junji
    Fisheries promotion office, Shizuoka prefectural government

Bibliographic Information

Other Title
  • カジメＥｃｋｌｏｎｉａ　ｃａｖａ胞子体の生長に及ぼす連続暗条件の影響
  • カジメ Ecklonia cava ホウシタイ ノ セイチョウ ニ オヨボス レンゾク アンジョウケン ノ エイキョウ

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Description

The growth pattern of the Ecklonia cava sporophyte under continuous dark and subsequent natural light regime was investigated. All sporophytes (n=8) survived during the 13- and 26-day continuous dark condition. During the 70-day continuous dark condition, one sporophyte died on the 70th day and another sporophyte died on the 99th day. In each experimental condition, the primary blade lengths decrease during the continuous dark condition; however, they regrow in the subsequent natural light condition. This growth pattern was also observed for intercalary growth; the growth rates that were below 0.15 mm/day in the dark condition were found to be high in the natural light condition. Based on these results, although the growth of the E. cava sporophytes suppressed in the continuous dark condition, the sporophytes survived for approximately 1 month in this condition.

Journal

  • Aquaculture Science

    Aquaculture Science 55 (1), 23-27, 2007

    Japanese Society for Aquaculture Science

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