ウナギの鼻上げ時の水中酸素量

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書誌事項

タイトル別名
  • OXYGEN CONTENT OF WATER IN WHICH THE EEL SUFFERS FROM SURFACING OR DYSPNOEA
  • ウナギ ノ ハナ アゲ ジ ノ スイチュウ サンソリョウ

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抄録

The eels in a culture pond ordinarily live near the bottom of the pond, but when the water becomes deficient in dissolved oxygen they come up to the surface, and in the extreme case they creep up to the margin of pond. The critical content of dissolved oxygen at which the eels presented symptoms of dyspnoea or surfacing is discussed. Roughly speaking, when the dissolved oxygen was less than 0.5cc/l, 10%, surfacing was observed, when the value was above l cc/l, 20%, it was not observed, and in 0.5-1cc/l, 10-20%, it was sometimes obser-ved and sometimes was not.<br> Eels sometimes presented a phenomenon somewhat like creeping in the extreme case of surfacing when sea water flowed into the pond.

収録刊行物

  • 日本水産学会誌

    日本水産学会誌 26 (10), 960-965, 1960

    公益社団法人 日本水産学会

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