Studies on the Medaka (Oryzias latipes) Found in Sea Water: II.Experimental Studies for Accomodation of the Fresh Water Medaka for Sea Water

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  • 海棲メダカの研究 II. 淡水メダカの海水適応

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The present report deals with the conditions of adaptivity of the fresh water Medaka to sea water. 1. When the fresh water Medaka was immersed into 5/5 or 4/5 sea water, most of them failed to survive. In 3/5 or 1/2 sea water, most of them could survive for two weeks. 2. After being pretreated for 2, 4, 6, 8, 12, 24, of 48 hours in 3/5 sea water, the medaka was transferred into normal sea water. Most of them could not survive in sea water until they were pretreated more than 24 hours in 3/5 water. 3. Form these experiments, it seems to be necessary for the Medaka to live in sea water from fresh water that they are exposed to about 3/5 sea water for 24 hours or more.

Journal

  • 動物学雑誌

    動物学雑誌 70 (6), 192-195, 1961-06-15

    東京動物學會

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