{"created":"2024-10-15T05:09:02.707289+00:00","id":2011834,"links":{},"metadata":{"_buckets":{"deposit":"c9bd4cd9-ff2a-4a5e-8963-a6dbdf137267"},"_deposit":{"created_by":10,"id":"2011834","owners":[10],"pid":{"revision_id":0,"type":"depid","value":"2011834"},"status":"published"},"_oai":{"id":"oai:fra.repo.nii.ac.jp:02011834","sets":["1:6:1724312741577"]},"author_link":["1296","1216","1208","1953","2908","2940","1209","1217"],"control_number":"2011834","item_10002_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2006-03","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"4","bibliographicNumberOfPages":"12","bibliographicPageEnd":"208","bibliographicPageStart":"197","bibliographicVolumeNumber":"54","bibliographic_titles":[{"bibliographic_title":"水産大学校研究報告","bibliographic_titleLang":"ja"},{"bibliographic_title":"Journal of National Fisheries University","bibliographic_titleLang":"en"}]}]},"item_10002_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"The bottom trawl fishery in the East China Sea has been one of the main fisheries of Japan. The fisheries resources are, however, decreasing and an effective resource management strategy is required. However, the species composition of the catch and discards of the by-catch from the bottom trawl fishery in the East China Sea have not yet been fully understood. For sustainable utilization of the demersal resources, the experiments with a two-level bottom trawl (13.5m mouth span, net height 10.5m, divided into an upper and lower net sections) were carried out to investigate this quantitatively. Forty one experimental trawling with the gear were carried out in the East China Sea aboard the training vessel Koyo-maru in every April from 1997 to 2003. A total of 30,425 individuals composed of 180 species were caught during the research period. The numerically dominant species were Trachurus japonicus (7,800individuals, 25.6%), Photololigo edulis (4,017individuals, 13.2%), Argyrosomus argentatus (2,470individuals, 8.1%). Of the total cath in number, the discards accounted for 20.4%. The main discarded species with no commercial values were Acanthocepola krusensterni and Macrorhamphosus scolopax, while those with commercial value was a swimming crab (Ovalipes punctatus), which is a target fish of bottom trawl fishery in the East China Sea.","subitem_description_language":"en","subitem_description_type":"Abstract"}]},"item_10002_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"水産大学校","subitem_publisher_language":"ja"},{"subitem_publisher":"National Fisheries 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