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分離漁獲装置付き2階式トロール網の分離効果
https://fra.repo.nii.ac.jp/records/2011666
https://fra.repo.nii.ac.jp/records/2011666f0a7c388-4977-46cf-84a7-7ac417e21e1f
| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 公開日 | 2024-10-11 | |||||||||||
| タイトル | ||||||||||||
| タイトル | 分離漁獲装置付き2階式トロール網の分離効果 | |||||||||||
| 言語 | ja | |||||||||||
| タイトル | ||||||||||||
| タイトル | Separation efficiency of a two-level trawl with a separation device | |||||||||||
| 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 | open access | |||||||||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||||||
| 著者 |
永松, 公明
× 永松, 公明× 久保田, 勝彦× 田渕, 清春× 巽, 重夫× 鎌野, 忠× 井上, 悟× 梶川, 和武
× 藤石, 昭生 |
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| 抄録 | ||||||||||||
| 内容記述タイプ | Abstract | |||||||||||
| 内容記述 | A bottom trawl fishery in the East China Sea is one of the main offshore fisheries in Japan. Both the annual catch and number of trawlers have been declining yearly due to their poor catches under improper resource control. For better utilization of the bottom fish resources, it is desirable to introduce a new trawl net with a separation device, which is functional in sorting and releasing small and immature fish. For this purpose, we designed a two-level trawl with square-meshed separation panel transversely attached to the mouth of the lower level. The Main objectives of this paper are to present the operating characteristics and separation efficiency of the test gear. The experimental trawlings were carried out in the East China Sea aboard the training vessel Koyo-maru in 1996. The following results were obtained: At a towing speed of 3.5 knots, the height of the net-mouth at the lower and upper parts of the gear were about 3.0m and 7.0m, respectively. Of 8 hauls tested on July 21-23, a total number of nearly 15,000 individuals were caught, and about 12,000 were caught in the upper codend, while about 3,000 were caught in the lower codend. Separation efficiency for 9 species were discussed by taking the length compositions of fishes colleeted in the upper and lower codends into consideration. As a result of a statistical comparison between the body size distributions of the fish caught in the lower codend and that in the upper codend, the gear was effective for these species. | |||||||||||
| 言語 | en | |||||||||||
| 書誌情報 |
ja : 水産大学校研究報告 en : Journal of National Fisheries University 巻 46, 号 4, p. 155-162, ページ数 8, 発行日 1998-03 |
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| 出版者 | ||||||||||||
| 出版者 | 水産大学校 | |||||||||||
| 言語 | ja | |||||||||||
| 出版者 | ||||||||||||
| 出版者 | National Fisheries University | |||||||||||
| 言語 | en | |||||||||||
| ISSN | ||||||||||||
| 収録物識別子タイプ | PISSN | |||||||||||
| 収録物識別子 | 0370-9361 | |||||||||||
| 書誌レコードID | ||||||||||||
| 収録物識別子タイプ | NCID | |||||||||||
| 収録物識別子 | AN00124678 | |||||||||||
| 情報源 | ||||||||||||
| 識別子タイプ | Local | |||||||||||
| 関連識別子 | fishu_k_46_155 | |||||||||||
| 関連サイト | ||||||||||||
| 識別子タイプ | URI | |||||||||||
| 関連識別子 | https://agriknowledge.affrc.go.jp/RN/2010572365 | |||||||||||
| 言語 | ja | |||||||||||
| 関連名称 | 日本農学文献記事索引(agriknowledge) | |||||||||||
