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Biology of the Amphioxus, Branchiostoma belcheri in the Ariake Sea, Japan II. Reproduction
http://hdl.handle.net/2298/11431
http://hdl.handle.net/2298/114315501b307-726d-4b5d-bf28-aa7e37ba3974
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
2003ZSA-2.pdf (904.4 kB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
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| 公開日 | 2009-04-30 | |||||
| タイトル | ||||||
| タイトル | Biology of the Amphioxus, Branchiostoma belcheri in the Ariake Sea, Japan II. Reproduction | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| キーワード | ||||||
| 主題 | amphioxus, Ariake Sea, Branchiostoma belcheri /gonad number, reproduction | |||||
| 資源タイプ | ||||||
| 資源タイプ | journal article | |||||
| 著者 |
山口, 高男
× 山口, 高男× 逸見, 泰久 |
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| 別言語の著者 |
逸見, 泰久
× 逸見, 泰久 |
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| 内容記述 | ||||||
| 内容記述 | We investigated the reproduction of the amphioxus Branchiostoma belcheri in the southern Ariake Sea, Japan, from 1999 to 2002. Gonads were very small or almost absent from September to December and began to develop in January. Changes in the gonad length index indicated that spawning began in mid June, after the gonads had attained maximum size. Although most gametes were extruded during the first spawning, some remained in the gonads. Shrunken gonads were much smaller but contained gametes, and the second spawning occurred around 10 July. It was unclear whether all adults spawned twice, but a large proportion of individuals did. After the first spawning, both males and females lost 30% of their body weight. Most one-year-old individuals did not spawn, and the minimum size at maturity was ca. 20mm. We found no termination of reproduction among very large individuals. The average number of gonads was significantly larger on the right side of the body (26.2 in males and 26.1 in females) than on the left side (24.0 in males and 23.5 in females). We found two hermaphrodites in a total of 11,184 specimens examined. Each had four or three ovaries among a total of 45 or 54 gonads. | |||||
| 書誌情報 |
Zoological Science 巻 20, 号 7, p. 907-918, 発行年 2003-07-25 |
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| 書誌レコードID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AA10545874 | |||||
| DOI | ||||||
| 関連タイプ | isIdenticalTo | |||||
| 関連識別子 | 10.2108/zsj.20.907 | |||||
| 情報源(ISSN) | ||||||
| 関連名称 | 02890003 | |||||
| フォーマット | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | application/pdf | |||||
| 形態 | ||||||
| 904393 bytes | ||||||
| 著者版フラグ | ||||||
| 出版タイプ | VoR | |||||
| その他の言語のタイトル | ||||||
| その他のタイトル | 有明海におけるナメクジウオの生物学 2 / アリアケカイ ニ オケル ナメクジウオ ノ セイブツガク 2 | |||||
| 出版者 | ||||||
| 出版者 | Zoological Society of Japan / 社団法人日本動物学会 | |||||
| 資源タイプ | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 論文(Article) | |||||
| 資源タイプ・ローカル | ||||||
| 雑誌掲載論文 | ||||||
| 資源タイプ・NII | ||||||
| Journal Article | ||||||
| 資源タイプ・DCMI | ||||||
| text | ||||||
| 資源タイプ・ローカル表示コード | ||||||
| 01 | ||||||
| URL | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | http://www.zoology.or.jp/ | |||||
| コメント | ||||||
| Zoological Science Award (論文賞) 2004年度受賞論文 | ||||||
