WEKO3
アイテム
飼育条件下におけるマアナゴ生殖腺の周年変化-1 生殖腺の周年変化に及ぼす飼育水温の影響
https://kindai.repo.nii.ac.jp/records/23877
https://kindai.repo.nii.ac.jp/records/238771484177d-ea40-4e2e-93c0-0e8333d1934f
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
AN00379737-20230331-0001.pdf (1.4 MB)
|
|
| Item type | ☆紀要論文 / Departmental Bulletin Paper(1) | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 公開日 | 2023-04-26 | |||||||||||||||||
| タイトル | ||||||||||||||||||
| タイトル | 飼育条件下におけるマアナゴ生殖腺の周年変化-1 生殖腺の周年変化に及ぼす飼育水温の影響 | |||||||||||||||||
| タイトル | ||||||||||||||||||
| タイトル | Annual changes in the gonadal development of the common Japanese conger, Conger myriaster, under rearing conditions -1 Effects of rearing water temperature on the annual changes of gonadal development | |||||||||||||||||
| 言語 | en | |||||||||||||||||
| 著者 |
中村, 尚隆
× 中村, 尚隆
× 瀬川, 叡
× 家戸, 敬太郎
|
|||||||||||||||||
| 言語 | ||||||||||||||||||
| 言語 | jpn | |||||||||||||||||
| キーワード | ||||||||||||||||||
| 主題 | common Japanese conger, Conger myriaster, gonadal development, rearing temperature, annual change | |||||||||||||||||
| 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(英) | ||||||||||||||||||
| en | ||||||||||||||||||
| NAKAMURA, Naotaka | ||||||||||||||||||
| 著者(英) | ||||||||||||||||||
| en | ||||||||||||||||||
| SEGAWA, Satoshi | ||||||||||||||||||
| 著者(英) | ||||||||||||||||||
| en | ||||||||||||||||||
| KATO, Keitaro | ||||||||||||||||||
| 著者 所属 | ||||||||||||||||||
| 近畿大学水産研究所富山実験場 | ||||||||||||||||||
| 著者 所属 | ||||||||||||||||||
| 岩手県沿岸広域振興局水産部 | ||||||||||||||||||
| 著者 所属 | ||||||||||||||||||
| 近畿大学水産研究所富山実験場: 近畿大学水産研究所白浜実験場 | ||||||||||||||||||
| 著者所属(翻訳) | ||||||||||||||||||
| Toyama station, Aquaculture Research Institute, Kindai University | ||||||||||||||||||
| 著者所属(翻訳) | ||||||||||||||||||
| Iwate Coastal Regional Development Bureau Department of Fisheries | ||||||||||||||||||
| 著者所属(翻訳) | ||||||||||||||||||
| Toyama station, Aquaculture Research Institute, Kindai University: Shirahama station, Aquaculture Research Institute, Kindai University | ||||||||||||||||||
| 版 | ||||||||||||||||||
| 出版タイプ | NA | |||||||||||||||||
| 出版タイプResource | http://purl.org/coar/version/c_be7fb7dd8ff6fe43 | |||||||||||||||||
| 出版者 名前 | ||||||||||||||||||
| 出版者 | 近畿大学水産研究所 | |||||||||||||||||
| 書誌情報 |
近畿大学水産研究所報告 en : Bulletin of the Aquaculture Research Institute, Kindai University 号 23, p. 1-14, 発行日 2023-03-31 |
|||||||||||||||||
| ISSN | ||||||||||||||||||
| 収録物識別子タイプ | ISSN | |||||||||||||||||
| 収録物識別子 | 09117628 | |||||||||||||||||
| 抄録 | ||||||||||||||||||
| 内容記述タイプ | Abstract | |||||||||||||||||
| 内容記述 | The common Japanese conger, Conger myriaster, is one of the most important fisheries resources in Japan. However, the catch of the common Japanese conger has decreased by nearly 80% over the past 25 years, and the early establishment of aquaculture and seedling production technology is required. In order to conduct the first stage of seedling production, egg collection, it is necessary to understand the maturation mechanism of the common Japanese conger, but there are still many unknowns, both in the wild and in captivity. To date, there have been no comparative studies of the interannual changes in the common Japanese conger gonads under different rearing conditions. In this study, we investigated the effects of different rearing water temperatures on the annual changes in the gonadal development. The fish were reared in an environment where the annual water temperature varied from 8.0 to 24.4°C (16.1 ± 5.0°C) and 8.5 to 19.5°C (13.9 ± 2.9°C) were designated as group 1 and 2, respectively. The GSI and egg diameter of females in group 1 increased until July, when the water temperature did not exceed 20°C. From August onward, the GSI and egg diameter decreased rapidly when the water temperature exceeded 20°C. In group 2, the GSI and egg diameter increased in August, when the water temperature did not exceed 20°C. In group 2, GSI and egg diameter increased in August and were significantly higher than in group 1 in September and October. The GSI of males was higher in the group 1 at most of the time except for the period of advanced regression. These results indicate that low water temperatures of less than 20°C in rearing condition lead to more advanced maturity in both males and females. However, water temperatures not exceeding 20°C per year were thought to suppress ovarian regression and cause large individual variation in maturity. | |||||||||||||||||
| フォーマット | ||||||||||||||||||
| 内容記述タイプ | Other | |||||||||||||||||
| 内容記述 | application/pdf | |||||||||||||||||
