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長崎県各地域の沿岸漁業における漁獲物構成と生態系影響の長期変化
http://hdl.handle.net/10069/00041317
http://hdl.handle.net/10069/000413177904368c-0e07-4dee-88e1-b6cc7fdd28d8
名前 / ファイル | ライセンス | アクション |
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suisan102_1.pdf (3.4 MB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2022-03-16 | |||||
タイトル | ||||||
タイトル | 長崎県各地域の沿岸漁業における漁獲物構成と生態系影響の長期変化 | |||||
言語 | ||||||
言語 | jpn | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 沿岸漁業 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Coastal fishery | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 生態系指標 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Ecosystem indicator | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 種多様度 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Species diversity | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 漁獲物平均栄養段階 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Mean trophic level of catch | |||||
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 |
池戸, 蒼真
× 池戸, 蒼真× 清田, 雅史 |
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著者別名 | ||||||
姓名 | IKEDO, Soma | |||||
著者別名 | ||||||
姓名 | KIYOTA, Masashi | |||||
その他のタイトル | ||||||
その他のタイトル | Long-term changes in catch compositions and ecosystem impacts of local fisheries in Nagasaki Prefecture | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | This paper aims to understand the long-term change and current status of fisheries in eight subregions of Nagasaki Prefecture on the basis of catch statistics from 1965 to 2018. Total catch amounts generally decreased after 2000 in all subregions. The cluster analysis of average catch compositions revealed three clusters (Iki and Tsushima; Seihi, Hokusho and Goto; Ariake bay, Omura bay and Tachibana bay) characterized by dominant fisheries and catch species. Four ecosystem indicators, i.e., species diversity index, Mean Trophic Level of Catch (MTLc), Primary Production Required (PPR) and Loss in Secondary Production (LSP), were analyzed to visualize the subregional differences in ecosystem changes and fishery impacts. The species diversity index and MTLc did not show clear decreasing trends in any subregions. The scatter plots of log transformed PPR and LSP were informative in demonstrating the expanding/contracting trends of catches and/or shifts in trophic position of the fishery removals. These results, combined with the information obtained through the interview with local fishermen, suggest that recent reduction of fishery catch in Nagasaki prefecture was not caused by shrinking fishing efforts but by reduced productivity of the coastal ecosystems. | |||||
書誌情報 |
長崎大学水産学部研究報告 en : Bulletin of the Faculty of Fisheries Nagasaki University 巻 102, p. 1-14, 発行日 2022 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 05471427 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AN00178473 | |||||
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 | |||||
出版者 | ||||||
出版者 | 長崎大学水産学部 | |||||
出版者別言語 | ||||||
The Faculty of Fisheries, Nagasaki University | ||||||
sortkey | ||||||
01 | ||||||
引用 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 長崎大学水産学部研究報告, 102, pp.1-14; 2022 |