{"created":"2024-04-08T04:46:49.940805+00:00","id":2001663,"links":{},"metadata":{"_buckets":{"deposit":"c1f97ab8-1794-4411-ab40-3ef4c78f5c42"},"_deposit":{"created_by":10,"id":"2001663","owners":[10],"pid":{"revision_id":0,"type":"depid","value":"2001663"},"status":"published"},"_oai":{"id":"oai:fra.repo.nii.ac.jp:02001663","sets":["12:14:1716950587014"]},"author_link":[],"control_number":"2001663","item_10002_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1996-03","bibliographicIssueDateType":"Issued"},"bibliographicNumberOfPages":"13","bibliographicPageEnd":"237","bibliographicPageStart":"225","bibliographicVolumeNumber":"60","bibliographic_titles":[{"bibliographic_title":"北海道区水産研究所研究報告","bibliographic_titleLang":"ja"},{"bibliographic_title":"Bulletin of the Hokkaido National Fisheries Research Institute","bibliographic_titleLang":"en"}]}]},"item_10002_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"We estimated the biomass of walleye pollock and anchovy using a quantitative echo sounder combined with analysis of midwater trawling catches. The acoustic survey, conducted from October to November 1994, was executed along 8 transect lines. Trawling was done at 7 stations, and CTD or XBT castings were executed at 48 sites. The vertical thermocline at about 100 m depth was cleared by CTD or XBT castings. The water temperatures above and under the thermocline were 5 to 15˚C and 2 to 5˚C, respectively. Anchovy (Engraulis japonicus) occurred in the shallow water layer. Small walleye pollock (Theragra chalcogramma) (about 200 mm in total length) occurred at the thermocline, and larger pollock (about 350 mm in total length) were below the thermocline. Based on results from the otolith readings, the smaller walleye pollock were 0 to 1 year old, and the larger pollock ranged from 2 to 5 years old. In the present survey area, the estimated biomass of the anchovy was 890,000 tons. The 0 and 1 age, and 2 to 5 years old walleye pollock were 139,000 and 23,400 tons, respectively (6,115 km2, degree of coverage=5.68 and C. V .= 0.25).","subitem_description_language":"en","subitem_description_type":"Abstract"},{"subitem_description":"スケトウダラの現存量を音響的に評価することを目的に,1994年10月31日~11月4日に北海道東部太平洋岸において調査を行った。調査は古野電気製計量魚探FQ-70(周波数50kHz)を用いてあらかじめ設定しておいた定線上を航走してその下に現れる反応を捉えた。CTDまたはXBTによる海洋観測を行い,魚群が濃密な海域では表中層トロール網(YOKO-I改良型)を用いて魚種判別を実施した。CTDまたはXBTによる海洋観測の結果,水深約100mのところに水温躍層がみられた。躍層より上層では水温5~15℃,下層では2~5℃であった.表中層トロールによる漁獲試験の結果,魚探に現れる反応はカタクチイワシおよびスケトウダラが主であった、これらの魚種の鉛直分布と水温分布とに関係がみられた。すなわち,カタクチイワシは水温躍層より上層に,スケトウダラは躍層付近から下層にそれぞれ分布した,したがって,今回の研究では,それぞれの魚種の遊泳水深を分けてやることにより現存量の推定を試みた。","subitem_description_language":"ja","subitem_description_type":"Abstract"}]},"item_10002_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"北海道区水産研究所","subitem_publisher_language":"ja"},{"subitem_publisher":"Hokkaido National Fisheries Research Institute","subitem_publisher_language":"en"}]},"item_10002_relation_16":{"attribute_name":"情報源","attribute_value_mlt":[{"subitem_relation_type_id":{"subitem_relation_type_id_text":"hnf_k_60_3","subitem_relation_type_select":"Local"}}]},"item_10002_relation_17":{"attribute_name":"関連サイト","attribute_value_mlt":[{"subitem_relation_name":[{"subitem_relation_name_language":"ja","subitem_relation_name_text":"日本農学文献記事索引(agriknowledge)"}],"subitem_relation_type_id":{"subitem_relation_type_id_text":"https://agriknowledge.affrc.go.jp/RN/2010541843","subitem_relation_type_select":"URI"}}]},"item_10002_source_id_11":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN1015410X","subitem_source_identifier_type":"NCID"}]},"item_10002_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0513-2541","subitem_source_identifier_type":"PISSN"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"metadata only access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_14cb"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"大下, 誠二","creatorNameLang":"ja"},{"creatorName":"オオシモ, セイジ","creatorNameLang":"ja-Kana"},{"creatorName":"Ohshimo, Seiji","creatorNameLang":"en"}],"familyNames":[{"familyName":"大下","familyNameLang":"ja"},{"familyName":"オオシモ","familyNameLang":"ja-Kana"},{"familyName":"Ohshimo","familyNameLang":"en"}],"givenNames":[{"givenName":"誠二","givenNameLang":"ja"},{"givenName":"セイジ","givenNameLang":"ja-Kana"},{"givenName":"Seiji","givenNameLang":"en"}]},{"creatorNames":[{"creatorName":"濱津, 友紀","creatorNameLang":"ja"},{"creatorName":"ハマツ, トモノリ","creatorNameLang":"ja-Kana"},{"creatorName":"Hamatsu, Tomonori","creatorNameLang":"en"}],"familyNames":[{"familyName":"濱津","familyNameLang":"ja"},{"familyName":"ハマツ","familyNameLang":"ja-Kana"},{"familyName":"Hamatsu","familyNameLang":"en"}],"givenNames":[{"givenName":"友紀","givenNameLang":"ja"},{"givenName":"トモノリ","givenNameLang":"ja-Kana"},{"givenName":"Tomonori","givenNameLang":"en"}]}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"北海道東部太平洋岸におけるスケトウダラとカタクチイワシの鉛直分布と現存量推定","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"北海道東部太平洋岸におけるスケトウダラとカタクチイワシの鉛直分布と現存量推定","subitem_title_language":"ja"},{"subitem_title":"Vertical distribution and acoustic estimation of biomass of walleye pollock Theragra chalcogramma, and anchovy Engraulis japonicus in the Pacific coast of eastern Hokkaido","subitem_title_language":"en"}]},"item_type_id":"10002","owner":"10","path":["1716950587014"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2024-04-08"},"publish_date":"2024-04-08","publish_status":"0","recid":"2001663","relation_version_is_last":true,"title":["北海道東部太平洋岸におけるスケトウダラとカタクチイワシの鉛直分布と現存量推定"],"weko_creator_id":"10","weko_shared_id":-1},"updated":"2025-01-17T05:11:48.499210+00:00"}