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親潮域の浮魚餌料環境にみられる規則的な季節変動の大きな振幅について
https://fra.repo.nii.ac.jp/records/2001698
https://fra.repo.nii.ac.jp/records/2001698d4a1f1e0-0cea-463e-95c4-2eb565d72ba8
| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 公開日 | 2024-04-08 | |||||||||||
| タイトル | ||||||||||||
| タイトル | 親潮域の浮魚餌料環境にみられる規則的な季節変動の大きな振幅について | |||||||||||
| 言語 | ja | |||||||||||
| タイトル | ||||||||||||
| タイトル | On large amplitude of regularly occurring seasonal variation in food conditions of pelagic fish in the Oyashio region east of northern Japan | |||||||||||
| 言語 | en | |||||||||||
| 言語 | ||||||||||||
| 言語 | jpn | |||||||||||
| 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 | metadata only access | |||||||||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||||||||
| 著者 |
谷口, 旭
× 谷口, 旭
|
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| 抄録 | ||||||||||||
| 内容記述タイプ | Abstract | |||||||||||
| 内容記述 | It is characteristic feature of the planktonic community in the Oyashio region that absolute primary productivity and the relative abundance of primary producers to secondary producers are regularly changing with seasons. The absolute primary productivity is very high in vernal blooming season followed by low summer value and intermediate in fall blooming season which is again followed by negligible winter value. During this course the relative abundance of zooplankton generally increases. Therefore, though individual number of the latter is always very smaller than cell number of the former, biomasses of the both become comparable during late summer and fall. This kind of seasonality in the plankton community is likely to make planktivorous Japanese sardine to change their main food items from phytoplankton to zooplankton during summer/fall feeding migration seasons into the Oyashio region. Because the seasonality mentioned above is rather regular phenomenon for many years or marked El Niño like phenomenon hardly occurs in the Oyashio region, long-term variation of the sardine population proceeds mainly with change in its intrinsic factors other than with annual fluctuation in food conditions. This situation can be advantageous feature in analyzing the factors of fluctuation of the population size. | |||||||||||
| 言語 | en | |||||||||||
| 書誌情報 |
ja : 北海道区水産研究所研究報告 en : Bulletin of the Hokkaido National Fisheries Research Institute 巻 55, p. 27-34, ページ数 8, 発行日 1991-03 |
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| 出版者 | ||||||||||||
| 出版者 | 北海道区水産研究所 | |||||||||||
| 言語 | ja | |||||||||||
| 出版者 | ||||||||||||
| 出版者 | Hokkaido National Fisheries Research Institute | |||||||||||
| 言語 | en | |||||||||||
| ISSN | ||||||||||||
| 収録物識別子タイプ | PISSN | |||||||||||
| 収録物識別子 | 0513-2541 | |||||||||||
| 書誌レコードID | ||||||||||||
| 収録物識別子タイプ | NCID | |||||||||||
| 収録物識別子 | AN1015410X | |||||||||||
| 情報源 | ||||||||||||
| 識別子タイプ | Local | |||||||||||
| 関連識別子 | hnf_k_55_2 | |||||||||||
| 関連サイト | ||||||||||||
| 識別子タイプ | URI | |||||||||||
| 関連識別子 | https://agriknowledge.affrc.go.jp/RN/2010501374 | |||||||||||
| 言語 | ja | |||||||||||
| 関連名称 | 日本農学文献記事索引(agriknowledge) | |||||||||||
