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海洋生活初期のサケ稚魚の回遊に関する生態学的研究
https://fra.repo.nii.ac.jp/records/2008184
https://fra.repo.nii.ac.jp/records/20081843b705dbf-4566-448e-bcd3-45bba0a80db0
| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2024-06-20 | |||||
| タイトル | ||||||
| タイトル | 海洋生活初期のサケ稚魚の回遊に関する生態学的研究 | |||||
| 言語 | ja | |||||
| タイトル | ||||||
| タイトル | Ecological Studies on the Migration of Juvenile Chum Salmon, Oncorhynchus keta, during Early Ocean Life | |||||
| 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 |
入江, 隆彦
× 入江, 隆彦 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The geographical and seasonal distributions of juvenile chum salmon, Oncorhynchus keta, were surveyed with oceanographic and food conditions in both nearshore and offshore waters around Hokkaido in 1977-1985. Physiological, ecological and morphological changes in the developmental process of juvenile chum salmon were also investigated. In this paper, the distribution and migration mechanisms are discussed in relation to oceanographic and food conditions, together with developmental stages of juvenile chum salmon. The patterns and routes of offshore migration and the optimal timing of juvenile chum salmon release are also discussed. Finally, characteristics in the distribution and migration of juvenile chum salmon originating in Japan are described. Juvenile chum salmon of 3-14 cm in fork length (FL) were distributed in and along the coastal waters in northern Japan. The juveniles of 3-8 cm FL were considered to be in the coastal residence, and those of 8-12 cm FL, in the process of offshore migration. The juveniles stayed in small harbours till they grew to more than 4.5cm FL. The increase in required food intake accompanied with growth and food shortage among the larger sizes in the harbours appear to be the major causes of migration of juvenile salmon from the harbours. Offshore migrating juvenile chum salmon were mainly distributed in areas with surface temperature from 9 to 13℃ and salinity from 31.0 to 33.9‰, and these water temperatures were proved to be closely connected with the physiological optimum temperature for juvenile chum salmon. The decrease in food organisms seems to be the main cause of migration for most of the juvenile salmon to other areas, and the rise in surface temperature over 15℃ to be the cause of migration for the delayed ones. The migration routes of juvenile salmon were proved to be formed along the coast, where the coastal water mass of low salinity was dominant and food organisms were abundant. Ecological findings on migration mechanisms of juvenile chum salmon were obtained and they are summarized in six points. To name some of the points : migrating juvenile chum salmon prefer sea water of 9-13℃; they migrate along the coast; they follow areas with good food conditions. The most suitable time for the release of juvenile chum salmon is when the coastal water mass is spreading along the coast. Optimal size of chum salmon at release is over 5 cm in fork length. | |||||
| 言語 | en | |||||
| bibliographic_information |
ja : 西海区水産研究所研究報告 en : Bulletin of the Seikai National Fisheries Research Institute 巻 68, p. 1-142, ページ数 142, 発行日 1990-03 |
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| 出版者 | ||||||
| 出版者 | 西海区水産研究所 | |||||
| 言語 | ja | |||||
| 出版者 | ||||||
| 出版者 | Seikai National Fisheries Research Institute | |||||
| 言語 | en | |||||
| item_10002_source_id_9 | ||||||
| 収録物識別子タイプ | PISSN | |||||
| 収録物識別子 | 0582-415X | |||||
| item_10002_source_id_11 | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AN00393385 | |||||
| 情報源 | ||||||
| 識別子タイプ | Local | |||||
| 関連識別子 | snf_k_68_1 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://agriknowledge.affrc.go.jp/RN/2010460585 | |||||
| 言語 | ja | |||||
| 関連名称 | 日本農学文献記事索引(agriknowledge) | |||||
