ヌマガエル雄の性分化 Sex Differentiation in the Male of the Frog, Rana limnocharis Wiegmann

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著者

抄録

More than 1, 500 frogs of Rana limnocharis were collected in Kumamoto district and used for a morphological study on the differentiation of their gonads. Results obtained were as follows: 1) Shortly after metamorphosis the gonads of all young frogs are of ovarian type in external appearance at least. But as they grow older, the gonads in about a half of them become testes, which are distinguishable macroscopically from the ovaries. This sex ratio is established at the end of the first year. 2) Examining the gonads microscopically at the end of metamorphosis, the gonads of the genetic males have a testicular structure, and in about a half of them the oocyte-like cells are present. 3) Although most of the oocyte-like cells degenerate during the first year, some of them remain and continue their growth in the following year. But they seldom attain about 150μ in diameter.

収録刊行物

  • 動物学雑誌

    動物学雑誌 60(11), 236-239, 1951-11

    日本動物学会

各種コード

  • NII論文ID(NAID)
    110003360772
  • NII書誌ID(NCID)
    AN00166645
  • 本文言語コード
    JPN
  • ISSN
    00445118
  • NDL 記事登録ID
    9998036
  • NDL 雑誌分類
    ZR4(科学技術--生物学--動物)
  • NDL 請求記号
    Z18-5
  • データ提供元
    NDL  NII-ELS  NDL-Digital 
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