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日本海西部における集魚灯漁船のリモートセンシング
https://fra.repo.nii.ac.jp/records/2011769
https://fra.repo.nii.ac.jp/records/2011769cd217ab3-98f0-4867-8bbc-edb5929baa89
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
fishu_k_52_1.pdf (2.6 MB)
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| Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 公開日 | 2024-10-11 | |||||||||||
| タイトル | ||||||||||||
| タイトル | 日本海西部における集魚灯漁船のリモートセンシング | |||||||||||
| 言語 | ja | |||||||||||
| タイトル | ||||||||||||
| タイトル | Remote-sensing of fishing boats equipped with fish-luring lamp | |||||||||||
| 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 |
杉原, 滋彦
× 杉原, 滋彦× 吉田, 剛
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| 抄録 | ||||||||||||
| 内容記述タイプ | Abstract | |||||||||||
| 内容記述 | Distribution of light from fish-luring lamps of fishing boat in the west of the Japan Sea were obtained from radiance sensed remotely by visible sensor of DMSP satellite. Many bright points are found in the binary image processed under a given threshold of radiance. These bright points often aggregate one another and form patch-like shape. With increasing threshold, the patch area decreases; bright points in a periphery part tend to disappear while those in the central part still remain bright. This suggests that the number of light sources in each pixel, density of light source, is larger in the central part of patch and decreases gradually towards the peripery part on the assumption that fish-luring light intensity for each boat is constant. Accordingly, the thereshold determines upper limit of density of fishing boat in each pixel. Fishig boats estimated from the DMSP are distributed without regard to the agreement line before Japan-Korea Fisheries Agreement which comes into force on Jan. 22, 1999. After the agreement, however, the fishing boats from the south Korea are located near to the line but do not cross over the line. On the other hand, Japanese boats keep at least 5 miles away from the line. Large patches found to the east of Tsushima island supports the development of good fishing ground which has been well known. Along the 100m isobath off San-in, bright area are observed in August and October but not in January and April. The seasonal defference may be attributed to specific fish species migrating around these area from summer to autumn. Since the first branch of Tsushima Warm Current flows along the 100m isobath, oceanic front may develop between the first branch and coastal waters. This explains the development of fishing ground for the 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 52, 号 1, p. 1-9, ページ数 9, 発行日 2004-01 |
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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_52_1 | |||||||||||
| 関連サイト | ||||||||||||
| 識別子タイプ | URI | |||||||||||
| 関連識別子 | https://agriknowledge.affrc.go.jp/RN/2010701154 | |||||||||||
| 言語 | en | |||||||||||
| 関連名称 | agriknowledge | |||||||||||
