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Comparative Observations on Inhibition of Ovarian Development in Larval Rana japonica (Anure:Ranidae) Treated with Testosterone During Different Stages of Development
https://doi.org/10.15027/30371
https://doi.org/10.15027/30371152d8bcd-6d4e-4e53-99f7-aef591c2061f
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
StudInfoBehavSci_14_1.pdf (485.4 KB)
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| アイテムタイプ | デフォルトアイテムタイプ_（フル）(1) | |||||||
|---|---|---|---|---|---|---|---|---|
| 公開日 | 2023-03-18 | |||||||
| タイトル | ||||||||
| タイトル | Comparative Observations on Inhibition of Ovarian Development in Larval Rana japonica (Anure:Ranidae) Treated with Testosterone During Different Stages of Development | |||||||
| 言語 | en | |||||||
| 作成者 |
Shirane, Terukiyo
× Shirane, Terukiyo
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| アクセス権 | ||||||||
| アクセス権 | open access | |||||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||
| 権利情報 | ||||||||
| 権利情報 | Copyright (c) 1990 by Faculty of Integrated Arts and Sciences, Hiroshima University. All rights reserved. | |||||||
| 主題 | ||||||||
| 主題Scheme | NDC | |||||||
| 主題 | 480 | |||||||
| 内容記述 | ||||||||
| 内容記述 | In order to investigate the effects of testosterone upon the inhibition of ovarian development, larvae of the ranid frog Rana japonica were treated with testosterone at different developmental stages, and their gonads examined at several subsequent larval stages. In larvae of genetic females treated with testosterone during Stages I - III, nests of germ cells (ovarian cords) were less well formed than in normally developing ovaries (Stage V) . Secondary ovarian cavities formed late, and only a few germ cells initiated oogenesis (Stage XV) . In these ovaries, significant proliferation of medullary cells for masculinization took place only after successive rounds of oogenesis had ceased completely. By contrast, in larvae exposed to testosterone during Stages III - X, the primitive nests of germ cells were formed normally, but the new nests corresponding to proliferation of germ cells were poorly formed owing to the presence of only few somatic cells. The replicated germ cells were arranged within primordial nests so as to form a colony (a kind of cyst) ; few cells participated in oogenesis. Although the medullary cells proliferated significantly during the period of treatment with testosterone, their morphogenesis for masculinization took place after the cysts of germ cells had moved completely away from the epithelium. These events suggest that the masculinization caused by treatment with testosterone is induced by stagnation of the development of the somatic cells at gonadal cortex rather than by the proliferation of medullary cells. | |||||||
| 言語 | en | |||||||
| 出版者 | ||||||||
| 出版者 | 広島大学総合科学部 | |||||||
| 言語 | ||||||||
| 言語 | eng | |||||||
| 資源タイプ | ||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||
| 資源タイプ | departmental bulletin paper | |||||||
| 出版タイプ | ||||||||
| 出版タイプ | VoR | |||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||
| ID登録 | ||||||||
| ID登録 | 10.15027/30371 | |||||||
| ID登録タイプ | JaLC | |||||||
| 収録物識別子 | ||||||||
| 収録物識別子タイプ | ISSN | |||||||
| 収録物識別子 | 0385-1478 | |||||||
| 収録物識別子 | ||||||||
| 収録物識別子タイプ | NCID | |||||||
| 収録物識別子 | AN00116614 | |||||||
| 開始ページ | ||||||||
| 開始ページ | 1 | |||||||
| 書誌情報 |
広島大学総合科学部紀要. III, 情報行動科学研究 Memoirs of the Faculty of Integrated Arts and Sciences. III, Studies in information and behavior sciences 巻 14, p. 1-11, 発行日 1991-02-28 |
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| 旧ID | 30371 | |||||||
