トラフグ生殖腺の性分化過程

DOI

書誌事項

タイトル別名
  • Gonadal Sex Differentiation in Tiger Puffer, Takifugu rubripes.

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抄録

The process of gonadal sex differentiation in tiger puffer, Takifugu rubripeswas studied histologically. Paired primordial gonads were found under the mesonephric ducts of a fish 7 days after hatching. The gonads were sexually indifferent until 40 days. The first sign of ovarian differentiation was the formation of ovarian cavity, which was observed in the gonads of about a half of fishes at 45-50 days. The increase of oogonium in number became evident from 55-65 days, and the oocytes appeared at 86 days. The gonads which lacked the ovarian cavity were still sexually indifferent at 55-65 days. The germ cells began to increase at 55-65 days in the peripheral region of the gonads without ovarian cavity. This characteristic showed the testicular differentiation. The beginning of meiosis in the testis was not observed until 105 days. The sperm duct began to form in posterior region of the testis at 75 days. The features of intersexuality were not found in this study.

収録刊行物

  • 水産増殖

    水産増殖 42 (4), 619-625, 1994

    日本水産増殖学会

キーワード

詳細情報 詳細情報について

  • CRID
    1390282679694969472
  • NII論文ID
    130003865410
  • NII書誌ID
    AN00124667
  • DOI
    10.11233/aquaculturesci1953.42.619
  • ISSN
    21850194
    03714217
  • 本文言語コード
    ja
  • データソース種別
    • JaLC
    • CiNii Articles
  • 抄録ライセンスフラグ
    使用不可

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