Effects of salinity on growth and vegetative propagation of <I>Sargassum miyabei</I> in Aso Lagoon, Kyoto Prefecture

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  • Morita Teruwo
    Fisheries Technology Department, Kyoto Prefectural Agriculture, Forestry and Fisheries Technology Center Present address: Graduate School of Bioresources, Mie University
  • Suzuki Chie
    Fisheries Technology Department, Kyoto Prefectural Agriculture, Forestry and Fisheries Technology Center Present address: Kyoto Prefectural Fisheries Office
  • Kumon Michihiko
    Fisheries Technology Department, Kyoto Prefectural Agriculture, Forestry and Fisheries Technology Center Present address: Kyoto Prefectural Fisheries Office
  • Douke Akio
    Fisheries Technology Department, Kyoto Prefectural Agriculture, Forestry and Fisheries Technology Center

Bibliographic Information

Other Title
  • 京都府阿蘇海における褐藻ミヤベモク <I>Sargassum miyabei</I> の生長と栄養繁殖におよぼす塩分の影響
  • 京都府阿蘇海における褐藻ミヤベモク Sargassum miyabei の生長と栄養繁殖におよぼす塩分の影響
  • キョウトフ アソノウミ ニ オケル カッソウ ミヤベモク Sargassum miyabei ノ セイチョウ ト エイヨウ ハンショク ニ オヨボス エンブン ノ エイキョウ

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Abstract

The growth and vegetative propagation of Sargassum miyabei were examined at four salinities (3, 7, 15 and 30 psu) in outdoor tanks. The plant was collected in Aso Lagoon, Kyoto Prefecture. The optimum salinity for plants growth was 15 and 30 psu. On the other hand, the inhibition of the growth was observed at 3 and 7 psu. Additionally, the number of newly formed stem from old stem was observed at 15 and 30 psu, but there was no difference in both temperatures. The number of newly formed stem from filamentous holdfast was almost the same at 7, 15 and 30 psu. In contrast, the number of newly formed stem from filamentous holdfast was inhibited at 3 psu. The growth of stem from filamentous holdfast was inhibited at 3 and 7 psu. Overall, the growth and vegetative propagation of S. miyabei was inhibited at 3 and 7 psu. So, this finding suggests that the S. miyabei in Aso Lagoon was high resistant plant for low salinity condition.

Journal

  • Aquaculture Science

    Aquaculture Science 63 (3), 311-316, 2015

    Japanese Society for Aquaculture Science

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