{"created":"2024-04-22T04:04:28.300067+00:00","id":2002237,"links":{},"metadata":{"_buckets":{"deposit":"a9c63e95-e0be-4fcb-b461-ac5014ba3507"},"_deposit":{"created_by":10,"id":"2002237","owners":[10],"pid":{"revision_id":0,"type":"depid","value":"2002237"},"status":"published"},"_oai":{"id":"oai:fra.repo.nii.ac.jp:02002237","sets":["12:14:1716951513399"]},"author_link":[],"item_10002_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1985-03","bibliographicIssueDateType":"Issued"},"bibliographicNumberOfPages":"108","bibliographicPageEnd":"108","bibliographicPageStart":"1","bibliographicVolumeNumber":"22","bibliographic_titles":[{"bibliographic_title":"遠洋水産研究所研究報告","bibliographic_titleLang":"ja"},{"bibliographic_title":"Bulletin, Far Seas Fisheries Research Laboratry","bibliographic_titleLang":"en"}]}]},"item_10002_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"The sablefish or blackcod, Anoplopoma fimbria (PALLAS), are widely distributed in the North Pacific Ocean and the Bering Sea, and form one of the commercially important groundfish resources in these regions. Sablefish have been exploited since the end of the 19th century by fishermen of the west coast of North America. The Japanese sablefish fishery was initiated in the northern Bering Sea in 1958 and then steadily expanded to other areas of the Bering Sea and Northeast Pacific Ocean. After reaching a peak in 1972, the amount of catch turned to decrease gradually up to 1976, but declined drastically in 1977 when Canada and the United States established 200-mile fishing zones. Consequently, the Japanese sablefish fishery is at a distressful situation. Although the rapid decline in catches was a direct result of more stringent management measures by Canada and the United States based on socio-economic factors, there was also disagreement of opinions between Japan and the United States on the condition of the stock which indirectly affected the situation. This thesis examines biological features of the sablefish stock, the condition of the resource, and provides estimates of acceptable biological catch. Biological characteristics examined are geographic and bathymetric distribution, migrations, stock structure, age and growth, sexual maturity, sex ratios, feeding habits, and recruitment processes. Trends in stock condition are examined based on statistics from the Japanese longline fishery and results of longline surveys, and biomass estimates derived from longline and trawl survey data. Finally, an acceptable biological catch (ABC) is estimated for the eastern Bering Sea, Aleutian Region, and Gulf of Alaska based on analysis of fisheries statistics, the change in the stock level between 1969 and 1979 and following 1979, and taking into account the recruitment of the extremely strong 1977 year class. In order to assure sound management of the sablefish fisheries, it will be necessary to clarify the age structure of the populations, the frequency and degree of geographic intermixing. and the mechanisms that result in strong year classes, as well as to improve the accuracy of biomass estimates and biological parameters. At the same time, it will also be important to continue to monitor the stock condition over a broad area of its range and to promote an active exchange of information among the countries concerned with the resource.","subitem_description_language":"en","subitem_description_type":"Abstract"},{"subitem_description":"ギンダラ(Anoplopoma fimbria(PALLAS))は,北太平洋とベーリング海に広く分布する重要な底魚資源の一つである。資源の開発は,北米西海岸の漁民により19世紀の終り頃から行なわれている。北洋水域における日本のギンダラ漁業は,1958年にベーリング海北部で開始され,順調に発展してきたが, 1972年を頂点として漁獲量は減少し始めた。沿岸国である米国とカナダが200海里体制を制度化した1977年以後漁獲量は急激に減少し,日本のギンダラ漁業は極めて厳しい状態に置かれることとなった。漁獲量の急激な減少は,米国とカナダによるギンダラの資源管理が強化されたことによるものであったが、その背景には社会経済的要因の他に,資源状態に対する日米間の見解の相違があった。本研究では,ギンダラの生物学的特徴を分布,回遊、資源の構造,年齢と成長,性成熟,性比,食性,及び加入の実態などの諸項目について明らかにした。また,日本のはえなわ漁業の漁獲統計資料から資源の動向を分析し,はえなわ調査の結果から近年の資源状態を評価するとともに,はえなわ調査とトロール調査の結果を併用して資源量を推定した。最後に,1969年から1979年までの漁業の経過と資源水準の変化及び1979年以後の資源量の変化を分析し,さらに1977年に顕著な卓越年級群が発生したことなどを考慮に入れて、東部ベーリング海,アリューシャン水域,及びアラスカ湾における1983年以後の生物学的許容漁獲量を推定した。ギンダラ資源について適正な資源管理を進めるには,ギンダラ個体群の年齢組成,水域間における地理的混合の速度と規模,及び卓越年級群の発生機構などを明らかにするとともに,資源量推定値や生物学的パラメーターの精度の向上が必要である。同時に,広い水域における資源のモニタリング調査の継続と,関係国間における情報交換をより活発にすることも重要であろう。","subitem_description_language":"ja","subitem_description_type":"Abstract"}]},"item_10002_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"遠洋水産研究所","subitem_publisher_language":"ja"},{"subitem_publisher":"Far Seas Fisheries Research Laboratry","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":"enyo_k_22-1","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/2010824236","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":"AN00025949","subitem_source_identifier_type":"NCID"}]},"item_10002_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0386-7285","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":"佐々木, 喬","creatorNameLang":"ja"},{"creatorName":"ササキ, タカシ","creatorNameLang":"ja-Kana"},{"creatorName":"Sasaki, Takashi","creatorNameLang":"en"}],"familyNames":[{"familyName":"佐々木","familyNameLang":"ja"},{"familyName":"ササキ","familyNameLang":"ja-Kana"},{"familyName":"Sasaki","familyNameLang":"en"}],"givenNames":[{"givenName":"喬","givenNameLang":"ja"},{"givenName":"タカシ","givenNameLang":"ja-Kana"},{"givenName":"Takashi","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":"北太平洋のギンダラ資源の研究","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"北太平洋のギンダラ資源の研究","subitem_title_language":"ja"},{"subitem_title":"Studies on the Sablefish Resources of the North Pacific Ocean","subitem_title_language":"en"}]},"item_type_id":"10002","owner":"10","path":["1716951513399"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2024-04-22"},"publish_date":"2024-04-22","publish_status":"0","recid":"2002237","relation_version_is_last":true,"title":["北太平洋のギンダラ資源の研究"],"weko_creator_id":"10","weko_shared_id":-1},"updated":"2025-12-16T08:11:40.801917+00:00"}