Seasonal variations and morphological changes of sporophytes of <I>Saccharina sculpera</I> (Laminariales, Phaeophyceae) from Hakodate, Hokkaido

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Other Title
  • 函館沿岸に生育する褐藻ガゴメ <I>Saccharina sculpera</I> 胞子体の季節的消長と形態形成
  • 函館沿岸に生育する褐藻ガゴメ Saccharina sculpera 胞子体の季節的消長と形態形成
  • ハコダテ エンガン ニ セイイク スル カッソウ ガゴメ Saccharina sculpera ホウシタイ ノ キセツテキ ショウチョウ ト ケイタイ ケイセイ

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Description

Seasonal variations and accompanying morphological changes of 'Gagome-kombu' (Saccharina sculpera) from Hakodate, Hokkaido Prefecture were observed for three years. The growth, maturation and renewal of first-year, second-year and third-year plants were documented. Between January and July, first-year plants with frond lengths less than 5 cm emerged and grew slowly to 10 cm by October. Although renewal was observed in first-year plants during October and January, no mature plants were observed. Second-year plants grew between January and July into large plants over 2 m in length, withered between August and October and reached maturity between October and November. Although renewal into third-year plants were observed in about 40% of 400 second-year plants, most of these plants withered and died by April of the third-year. Only 2% of the second-year plants continued to grow until July, withering between August and October and maturing in October and November. All the plants withered and died by December of the third-year.

Journal

  • Aquaculture Science

    Aquaculture Science 63 (3), 235-244, 2015

    Japanese Society for Aquaculture Science

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