Growth and Maturation of the Brown Alga Eckloniopsis radicosa, on the Coast of Izu-Oshima Island, Central Japan

DOI JASI Web Site 4 Citations 24 References
  • KOMAZAWA Ichiro
    Oshima Branch, Tokyo Metropolitan Islands Area Research and Development Center of Agriculture, Forestry and Fisheries
  • SUGINO Takashi
    Tokyo Sea Life Park, Edogawa
  • TAKIO Kenji
    Oshima Branch, Tokyo Metropolitan Islands Area Research and Development Center of Agriculture, Forestry and Fisheries
  • ANDO Kazuto
    Oshima Branch, Tokyo Metropolitan Islands Area Research and Development Center of Agriculture, Forestry and Fisheries
  • YOKOHAMA Yasutsugu
    Minamisanriku Nature Center

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Other Title
  • 伊豆大島におけるアントクメの生長と成熟
  • イズ オオシマ ニ オケル アントクメ ノ セイチョウ ト セイジュク

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Abstract

At the rocky shore of Izu-Oshima Island, the northern limit of the Pacific distribution of the brown alga Eckloniopsis radicosa, young plant of the species appeared in late January and attained the maximum blade length of about 60 cm in mid June, 2002 and 2003, during the period of November, 2001 to January, 2004. After that the length of blades became progressively shorter from July to October and disappeared in November. The formation of zoosporangial soni on blades and release of spores were observed from July to October. Water temperature for release of spores or disappearance of blades was lowered by several degrees centigrade than that observed in more southern water of Japan, such as Wakayama and Kochi prefectures.

Journal

  • Aquaculture Science

    Aquaculture Science 54 (4), 489-494, 2006

    Japanese Society for Aquaculture Science

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