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Growth of the Medaka (IV) ―Dynamics of Oocytes in the Ovary During Metamorphosis
http://hdl.handle.net/10424/5976
http://hdl.handle.net/10424/59760e9adab3-5623-4b7f-b40c-7b90822e46c5
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
kenshi643746.pdf (2.1 MB)
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| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2015-03-30 | |||||
| タイトル | ||||||
| タイトル | Growth of the Medaka (IV) ―Dynamics of Oocytes in the Ovary During Metamorphosis | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | oocyte number | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | oocyte composition | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | ovary | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | metamorphosis | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | larva | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | medaka | |||||
| 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 | |||||
| 著者 |
Iwamatsu, Takashi
× Iwamatsu, Takashi |
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| 著者(別言語) | ||||||
| 岩松, 鷹司 | ||||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The present investigation provides information on dynamic aspects of developing oocytes in the ovary during the growth period of the medaka from larva to juvenile. After hatching, the ovary increases in a longitudinal length, in proportion to body growth, although its width exhibits a slightly steeper rise from 13–14 mm total length (TL). In the ovary of larvae measuring 13 mm TL or greater, the largest oocytes enter stage IV in which the chorion (egg envelope) with attaching and villi (non-attaching filaments) begins to form. When body size reaches 14 mm TL, the composition of developing oocytes (follicles) in an ovary shifts from the previtellogenic to the early vitellogenic patterns. After larvae attain a body size of more than 15 mm TL, the largest size of oocytes continues to increase steeply with great variation among individuals as body growth progresses. It was also found that the total number of oocytes in an ovary continues to increase in proportion to body growth during metamorphosis. Moreover, the metrical data reveal that small oocytes of 45 μm in diameter represent a dominant population in the oocyte composition in each ovary, irrespective of body size, and that the ovary always retains oogonia and small oocytes 9–18 μm in diameter in the range of 9–15 per cent. It is conceivable that recruitment of new oocytes may occur directly from oogonia in the germinal nests (germinal cradles) that are located in the epithelial regions surrounding large oocytes and at the edge of the luminal wall of the ovary. | |||||
| 書誌事項 |
愛知教育大学研究報告. 自然科学編 巻 64, p. 37-46, 発行日 2015-03-01 |
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| 出版者 | ||||||
| 出版者 | 愛知教育大学 | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 1884-5169 | |||||
| 書誌情報 | ||||||
| 愛知教育大学研究報告, 自然科学編. 2015, 64, p. 37-46 | ||||||
| 書誌レコードID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AA12466167 | |||||
| 著者版フラグ | ||||||
| 出版タイプ | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
| 著者別名 | ||||||
| イワマツ, タカシ | ||||||
| 資源タイプ | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | text | |||||
