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大西洋マダラの成長と生殖に及ぼす環境の影響
https://fra.repo.nii.ac.jp/records/2010711
https://fra.repo.nii.ac.jp/records/2010711ed5ece65-fd5b-43e2-bfff-ad37d28d045a
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
fra_kb_4_31.pdf (587.3 KB)
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| アイテムタイプ | 紀要論文 / Departmental Bulletin Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2024-09-30 | |||||
| タイトル | ||||||
| タイトル | 大西洋マダラの成長と生殖に及ぼす環境の影響 | |||||
| 言語 | ja | |||||
| タイトル | ||||||
| タイトル | Effects of Environmental Condition on Growth and Reproduction of Atlantic Cod, Gadus morhua | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | jpn | |||||
| キーワード | ||||||
| 言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | Atlantic cod; photoperiod; water temperature; food availability; gonadal maturation; annual egg production | |||||
| 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 | |||||
| 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 | |||||
| 著者 |
米田, 道夫
× 米田, 道夫 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | This paper describes the effects of temperature and food availability on growth and reproduction of first-time spawning Atlantic cod, Gadus morhua, in addition to the previous findings on the relationship between environmental condition and reproductive characteristics of this species. A reduction in daylength is a vital environmental cue regulating the gonadal maturation. The growth in vitellogenic oocyte diameter is positively correlated with temperature. Higher food availability can lead to a higher egg production of females that have experienced spawning before. In first-time spawning fish, there were sex-specific differences in the environmental effects on sexual maturation and gamete production. Low temperature led to an arrest in the onset of vitellogenesis, resulting in the occurrence of females that postponed spawning. Food manipulation did not significantly affect potential fecundity, but did affect somatic growth during vitellogenesis. In contrast, higher food availability resulted in a higher sperm production. A marked truncation in the upper size and age structure of cod spawning stock biomass is now evident due to the intense fishing pressure during the last several decades. Therefore, the pre-spawning season environment could potentially have an effect on annual egg production of such young population in the coming and future spawning seasons. | |||||
| 言語 | en | |||||
| 書誌情報 |
ja : 水産研究総合センター研究報告別冊 en : Bulletin of Fisheries Research Agency（Supplement） 巻 4, p. 31-39, ページ数 9, 発行日 2006-03 |
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| 出版者 | ||||||
| 出版者 | 水産総合研究センター | |||||
| 言語 | ja | |||||
| 出版者 | ||||||
| 出版者 | Japan Fisheries Research Agency | |||||
| 言語 | en | |||||
| ISSN | ||||||
| 収録物識別子タイプ | PISSN | |||||
| 収録物識別子 | 1346-9894 | |||||
| 書誌レコードID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AA11589591 | |||||
| 情報源 | ||||||
| 識別子タイプ | Local | |||||
| 関連識別子 | fra_kb_4_31 | |||||
| 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 | |||||
| 見出し | ||||||
| 大見出し | 第2章：水温影響の実験例 | |||||
