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佐渡島真野湾に放流したヒラメ種苗の被食減耗
https://fra.repo.nii.ac.jp/records/2010743
https://fra.repo.nii.ac.jp/records/2010743990a635f-afb8-4815-be41-6f182389086c
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
fra_kb_5_165.pdf (2.2 MB)
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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 | 佐渡島真野湾に放流したヒラメ種苗の被食減耗 | |||||
| 言語 | ja | |||||
| タイトル | ||||||
| タイトル | Predation mortality of hatchery-reared juvenile Japanese flounder Paralichthys olivaceus released in Mano Bay, Sado Island | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | jpn | |||||
| キーワード | ||||||
| 言語 | en | |||||
| 主題Scheme | Other | |||||
| 主題 | Japanese flounder; mortality; predation; release; swimming crab | |||||
| 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 |
首藤, 宏幸
× 首藤, 宏幸× 梶原, 直人× 藤井, 徹生 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | We estimated the impact of predation by crabs and fishes on hatchery-reared juvenile Japanese flounder Paralichthys olivaceus released into a flounder nursery habitat in Mano Bay, Sado Island. In 2001 and 2002, nearly 50,000 reared juvenile（ca. 6.1 cm total length）were released each year and 68％ and 83％, respectively, of them were estimated to suffer mortality in the first week after release. Foregut content analysis of crabs caught in the nursery, using a PCR-based technique, revealed that the swimming crab Charybdis japonica is a significant predator on released flounder. This finding was supported by laboratory observations that the crabs readily preyed on live reared flounder. In addition, through microscopic observations of stomach contents of piscivorous fishes, 4 species（devil stinger, 1-age Japanese flounder, spotted flathead and bartailed flathead）were identified as predators. According to the calculations based on gut content analyses and abundances of these predators, predation by swimming crabs is estimated to account for 41％ and 46％ of the loss of released flounder during the first week after release in 2001 and 2002, respectively, whereas predation by 4 piscivorous fishes accounted for 19％ and 21％ of the loss in 2001 and 2002, respectively. Thus, we conclude that predation is the major factor of heavy mortality of released flounder shortly after release. | |||||
| 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 5, p. 165-167, ページ数 3, 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_5_165 | |||||
| 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 | 2：資源添加等の生態学・分子生物学的解明・評価に基づく放流技術の高度化 | |||||
| 小見出し | 2）ヒラメサブチーム | |||||
