Effect of Low Salinity on Ventilation in the Oyster <I>Crassostrea gigas</I>

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  • マガキの換水運動に及ぼす低塩分の影響
  • マガキ ノ カンスイウンドウ ニ オヨボス テイエンブン ノ エイキョウ

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Abstract

Effects of low salinity on ventilation volume, ciliary movement and survival ratio were examined in the Pacific oyster Crassostrea gigas. At 12 and 20°C, ventilation volumes decreased as the salinity declined, and showed 0 l/min/kg at 19 psu. At 12 and 20°C, the transportation velocity of a piece of vinyl film put on the gill surface were constant until the salinity decreased from 35 to 25 psu, but decereased to 80% at 20 psu and to 0 mm/min at 8 psu. The survival rate showed 100% for 10 days at 20 psu or above, but decreased from the 9th day at 15 psu, and from the 4th day at 10 psu and 5 psu.

Journal

  • Aquaculture Science

    Aquaculture Science 59 (1), 5-8, 2011

    Japanese Society for Aquaculture Science

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