{"created":"2024-10-03T01:18:20.708851+00:00","id":2010820,"links":{},"metadata":{"_buckets":{"deposit":"d7674ffe-ed42-4d4b-9585-48c1d95f6bf2"},"_deposit":{"created_by":10,"id":"2010820","owners":[10],"pid":{"revision_id":0,"type":"depid","value":"2010820"},"status":"published"},"_oai":{"id":"oai:fra.repo.nii.ac.jp:02010820","sets":["1:8:1724311988349"]},"author_link":["2790","2067","531","575"],"item_10002_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2005-12","bibliographicIssueDateType":"Issued"},"bibliographicNumberOfPages":"10","bibliographicPageEnd":"10","bibliographicPageStart":"1","bibliographicVolumeNumber":"15","bibliographic_titles":[{"bibliographic_title":"水産総合研究センター研究報告","bibliographic_titleLang":"ja"},{"bibliographic_title":"Bulletin of  Fisheries Research Agency","bibliographic_titleLang":"en"}]}]},"item_10002_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"In the Yukawa river, Nikko, Japan, catch-and-release （C&R） regulation has been adopted in all the fishing area since 2002. A questionnaire to the anglers was conducted throughout the fishing season （May 1 to September 30） in 2002 and 2003 to examine the effect of C&R regulation on sustaining brook trout （Salvelinus fontinalis） stocks. Compared to 2001, the numbers of angler were increased in 2002 and 2003, by 27.4% and 34.2%, respectively. Among the 3 angling methods （fly, lure, bait）, the percentage of fly-fisher, who had supposedly practiced C&R even before 2002, has increased in 2002 and 2003, by 20.5% to 83.8% and by 24.8% to 88.1%, respectively. Catch rate （number of fish caught/angler-hour） in 2002 and 2003 has also increased by 0.03 to 1.05 and by 0.19 to 1.21, respectively. Brook trout populations were found to remain abundant even after the fishing season by mark-recapture method （Petersenʼs method）. These results indicate that C&R regulation in the Yukawa river, which was accepted favorably by the anglers without serious troubles, was effective to sustain brook trout stocks.","subitem_description_language":"en","subitem_description_type":"Abstract"},{"subitem_description":"2002年度から全域キャッチアンドリリース（C&R）制となった湯川において，C&R による魚類資源維持効果の判定を目的として釣り人へのアンケート調査及び釣魚期間前後における資源調査を2002年と2003年に行った。C&R 制導入前の2001年と比較すると，釣魚者は27.4%（2002年）及び34.2%（2003年）増加し，フライ釣り人の割合はそれぞれ83.8% 及び88.1% に増加した。時間当たり釣獲率も2003年には1.21と有意に上昇した。また，両年とも釣魚期間前よりも釣魚期間後にカワマス資源量が増加していた。これらから，元々 C&R を基本とするフライ釣りの割合の高かった湯川における C&R 制の導入は，釣魚者には好意的に受け入れられ，カワマス資源の維持に効果的であったことが示された。","subitem_description_language":"ja","subitem_description_type":"Abstract"}]},"item_10002_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"水産総合研究センター","subitem_publisher_language":"ja"}]},"item_10002_relation_16":{"attribute_name":"情報源","attribute_value_mlt":[{"subitem_relation_type_id":{"subitem_relation_type_id_text":"fra_k_15_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_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/2010730028","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":"AA11589591","subitem_source_identifier_type":"NCID"}]},"item_10002_source_id_9":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"1346-9894","subitem_source_identifier_type":"PISSN"}]},"item_10002_version_type_20":{"attribute_name":"著者版フラグ","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_970fb48d4fbd8a85","subitem_version_type":"VoR"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"open 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