WEKO3
アイテム
グリッドパネル付2階式トロール網の分離効果とサイズ選択性
https://fra.repo.nii.ac.jp/records/2011684
https://fra.repo.nii.ac.jp/records/20116848ef5d87f-8454-417d-81b1-28a6ef0bb79d
| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2024-10-11 | |||||
| タイトル | ||||||
| タイトル | グリッドパネル付2階式トロール網の分離効果とサイズ選択性 | |||||
| 言語 | ja | |||||
| タイトル | ||||||
| タイトル | Separation efficiency and size-selectivity of a two-level trawl with a separation grid-panel | |||||
| 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× 藤石, 昭生 |
|||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | For better utilization of the bottom fish resources, a two-level trawl was designed. The net-mouth of the lower level in this gear was covered with a grid-panel (square-mesh net panel) to separate marketable fish from the smaller and non-commercial fish. The main objectives of this study were to investigate the species-separation efficiency and fish size-selectivity of the test gear. The experiments were conducted using two different mesh-bar sizes, 60mm and 120mm, on the grid-panel. Experiments were carried out in the East China Sea aboard the training vessel Koyo-maru in 1996 (60mm mesh) and 1997 (120mm mesh). At the towing speed of 3.3-4.0 knots, the heights of the net-mouth at the lower and upper parts of the gear were about 3.0m and 7.0m, respectively. Separation efficiencies, defined as the ratio of the catch in the upper cod-end to the total catch, were compared for the two mesh sizes. The separation ratios of the 60mm and 120mm mesh size grid-panels were about 80% and 50%, respectively. As a result of a comparison of eight species for the size-selectivity of the different mesh sizes, the 120mm mesh grid-panel has size-selectivity to some extent. Thus, the use of the 120mm mesh size in the grid-panel was effective for the eight staple 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 47, 号 3, p. 93-102, ページ数 10, 発行日 1999-02 |
|||||
| 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_47_93 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://agriknowledge.affrc.go.jp/RN/2010592503 | |||||
| 言語 | ja | |||||
| 関連名称 | 日本農学文献記事索引(agriknowledge) | |||||
