魚類の榮養に関する研究-V

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書誌事項

タイトル別名
  • Studies on Nutrition of Fish-V
  • ギョルイ ノ エイヨウ ニ カンスル ケンキュウ 5
  • The Excretion of NH<sub>3</sub>-N and Urea-N by Carp and Goldfish
  • 排泄物中のAmmonia-N竝びにUrea-Nに就て

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抄録

During the course of an investigation on the digestibility of the protein in diets, our attention was attracted to the NH3-N, and urea-N excreted by carp and goldfish.<br> This work was undertaken to determine quantitatively these substances excreted under several different conditions: A-Fish were fed in an approximately air-saturated water; B-Similar to A, but in a water deficient in O2; C-Starved in O2 suffcient water; D-Starved in water deficient in O2<br> The results obtained were as follows:<br> (1) Under the normal condition (A), the form of the nitrogen excreted seems to be essentially NH3-N (Table 3).<br> (2) When the fishes were kept starved or in a water of low O2- content for a long time (B, C, D), urea-N excreted increases in amount (Table 1, 2, 4).

収録刊行物

  • 日本水産学会誌

    日本水産学会誌 21 (2), 119-122, 1955

    公益社団法人 日本水産学会

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