{"created":"2021-03-01T07:00:24.428828+00:00","id":40742,"links":{},"metadata":{"_buckets":{"deposit":"b7c70969-cdea-44e8-b673-8e66f85571d5"},"_deposit":{"id":"40742","owners":[],"pid":{"revision_id":0,"type":"depid","value":"40742"},"status":"published"},"_oai":{"id":"oai:repository.dl.itc.u-tokyo.ac.jp:00040742","sets":["40:6494:7162:7200:7201","9:504:7165:7202:7203"]},"item_4_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2006-06-25","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"2","bibliographicPageEnd":"431","bibliographicPageStart":"425","bibliographicVolumeNumber":"30","bibliographic_titles":[{"bibliographic_title":"Coastal marine science"}]}]},"item_4_description_13":{"attribute_name":"フォーマット","attribute_value_mlt":[{"subitem_description":"application/pdf","subitem_description_type":"Other"}]},"item_4_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"In order to discuss the influence of dam discharge on the movement of ayu Plecoglossus altivelis in a river and the stocking effectiveness of released ayu, the migratory history of 83 juveniles of ayu (standard length=67.9-142.4mm sL) collected in the Kurobe River, Japan during 25 June-23 August 2004 was determined by otolith microchemistry, and the origin of fish was identified as being either native amphidromous ayu or released amphidromous or landlocked fish. Except for otoliths with abnormal morphology (N=10), most specimens (96%, N=70) had inner layers (radius:>400μm) of higher Sr: Ca ratios and outer ones of low values. These specimens were identified as native amphidromous fish that migrated upstream from the sea. Only 4% (N=3) were released ayu (reared fish), which were further divided into two origins, amphidromous fish (N=2) with smaller inner layers (radius:<400μm) of high Sr: Ca ratios, and landlocked fish (N=1) with constantly low values over the whole otolith. There were no specimens with an increase in Sr: Ca ratios in the outer layers of the low Sr: Ca region of the otolith after their upstream migration in spring, suggesting that it is unlikely that any of these ayu had been washed-out from the river by cold and turbulent river water.","subitem_description_type":"Abstract"}]},"item_4_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15083/00040733","subitem_identifier_reg_type":"JaLC"}]},"item_4_publisher_20":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"International Coastal Research Center, Ocean Research Institute, the University of Tokyo"}]},"item_4_source_id_10":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AA11957899","subitem_source_identifier_type":"NCID"}]},"item_4_source_id_8":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"13493000","subitem_source_identifier_type":"ISSN"}]},"item_4_subject_15":{"attribute_name":"日本十進分類法","attribute_value_mlt":[{"subitem_subject":"452","subitem_subject_scheme":"NDC"}]},"item_4_text_21":{"attribute_name":"出版者別名","attribute_value_mlt":[{"subitem_text_value":"東京大学海洋研究所国際沿岸海洋研究センター"}]},"item_4_text_4":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"Ocean Research Institute, The University of Tokyo"},{"subitem_text_value":"Fisheries Environment Institute"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Kuroki, Mari"}],"nameIdentifiers":[{"nameIdentifier":"139389","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Ma, Tao"}],"nameIdentifiers":[{"nameIdentifier":"139390","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Ishida, Rikizo"}],"nameIdentifiers":[{"nameIdentifier":"139391","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Tsukamoto, Katsumi"}],"nameIdentifiers":[{"nameIdentifier":"139392","nameIdentifierScheme":"WEKO"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2017-06-27"}],"displaytype":"detail","filename":"KJ00004354641.pdf","filesize":[{"value":"1.3 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"KJ00004354641.pdf","url":"https://repository.dl.itc.u-tokyo.ac.jp/record/40742/files/KJ00004354641.pdf"},"version_id":"07209d63-37b0-4166-ba0d-16470ec87c42"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"ayu","subitem_subject_scheme":"Other"},{"subitem_subject":"Plecoglossus altivelis","subitem_subject_scheme":"Other"},{"subitem_subject":"migratory history","subitem_subject_scheme":"Other"},{"subitem_subject":"otolith","subitem_subject_scheme":"Other"},{"subitem_subject":"Sr: Ca ratios","subitem_subject_scheme":"Other"},{"subitem_subject":"Kurobe River","subitem_subject_scheme":"Other"},{"subitem_subject":"stocking","subitem_subject_scheme":"Other"}]},"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":"Migratory history of wild and released ayu (Plecoglossus altivelis) in the Kurobe River, Japan","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Migratory history of wild and released ayu (Plecoglossus altivelis) in the Kurobe River, Japan"}]},"item_type_id":"4","owner":"1","path":["7203","7201"],"pubdate":{"attribute_name":"公開日","attribute_value":"2007-04-05"},"publish_date":"2007-04-05","publish_status":"0","recid":"40742","relation_version_is_last":true,"title":["Migratory history of wild and released ayu (Plecoglossus altivelis) in the Kurobe River, Japan"],"weko_creator_id":"1","weko_shared_id":null},"updated":"2022-12-19T04:16:19.827028+00:00"}