Effects of Suruga Bay Deep-sea Water, Irradiance and Water Temperature on the Growth of Juvenile Eisenia arborea

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  • NIMURA Kazumi
    Shizuoka Prefectural Institute of Fishery, Suruga-bay Deep Seawater Aquaculture Research Center
  • OKAMOTO Kazutoshi
    Shizuoka Prefectural Institute of Fishery, Suruga-bay Deep Seawater Aquaculture Research Center
  • TAKASE Susumu
    Shizuoka Prefectural Institute of Fishery, Suruga-bay Deep Seawater Aquaculture Research Center

Bibliographic Information

Other Title
  • 駿河湾深層水・光量および水温がサガラメＥｉｓｅｎｉａ　ａｒｂｏｒｅａ幼体の生長に及ぼす影響
  • スルガワン シンソウスイ コウリョウ オヨビ スイオン ガ サガラメ Eisenia arborea ヨウタイ ノ セイチョウ ニ オヨボス エイキョウ

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Description

Juvenile Eisenia arborea sporophytes were cultured in indoor tanks containing deep-sea water (DSW, known as clean, cold and nutrient-rich) from Suruga Bay, central Pacific Coast of Japan, pumped from depths of 397 m and 687 m using pipelines. This experiment was performed to determine the most suitable growth condition for Eisenia arborea seed production. At the end of culture, blade lengths of the sporophytes cultured in deep-sea water (pumped from depths of 397 m and 687 m) were 122±15 mm and 128±15 mm [relative growth rate (RGR), 3.7%/day and 4.1%/day, respectively] . These values of blade length were higher than those obtained for sporophytes cultured in surface sea water (100±8 mm; RGR, 3.2%/day) . Small sporophytes (< 150 mm) had blade lengths of 141±19 mm and 138±17 mm (RGR, 4.1 %/day and 3.6%/day) at a water temperature of 12, 17°C, and these values were greater than those obtained for sporophytes at 21°C (100±9 mm; RGR, 3.3%/day) . At 8 -18°C, large sporophytes (> 150 mm) showed higher growth rate (ca 1.0%/day) in light conditions above 3.6 mol/m2/day.

Journal

  • Aquaculture Science

    Aquaculture Science 55 (2), 199-204, 2007

    Japanese Society for Aquaculture Science

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