{"created":"2023-05-15T16:32:08.292675+00:00","id":3863,"links":{},"metadata":{"_buckets":{"deposit":"9e5f3de1-152d-43de-b9a3-cda4fba5fc7c"},"_deposit":{"created_by":2,"id":"3863","owners":[2],"pid":{"revision_id":0,"type":"depid","value":"3863"},"status":"published"},"_oai":{"id":"oai:nagasaki-u.repo.nii.ac.jp:00003863","sets":["50:51"]},"author_link":["15702","15696","15700","15699","15703","15706","15707","15697","15695","15708","15704","15701","15698","15705"],"item_2_alternative_title_19":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"An Experiment for Preventing Mass Mortality of Cultured Short-neck Clams Due to Hypoxia Formation During Summer in Isahaya Bay"}]},"item_2_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2010-07-15","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"1","bibliographicPageEnd":"62","bibliographicPageStart":"53","bibliographicVolumeNumber":"47","bibliographic_titles":[{"bibliographic_title":"水産工学"}]}]},"item_2_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"諫早湾の諫早市小長井町地先の干潟でも、養殖されているアサリが夏季に大量へい死する事例が数年に1度発生しており、2000年8月には2億6千万円の漁業被害が生じた。そのへい死原因として、2000年と同程度の被害を生じた2004年8月の事例では、水温31℃以上の高水温と約14時間継続した貧酸素状態が複合的に作用したためと報告されている。本研究では、（1）干潟域のアサリ養殖場において、貧酸素化の発生を事前に予測し、（2）貧酸素化する前に遮断幕で養殖場を囲って貧酸素水の進入を遮断し養殖場内を曝気する底層溶存酸素の改善システムの試験を実施した。その結果、本改善システムがアサリのへい死及び底質悪化の防止に効果的であることが確認されたので、その概要について報告する。","subitem_description_type":"Abstract"},{"subitem_description":"An experiment for preventing mass mortality of cultured short-neck clams due to hypoxic and anoxic conditions was conducted at the Kama tidal flat in northern Isahaya Bay, Nagasaki, in the middle of August 2008. Before the experiment, the starting date (11 August 2008) of hypoxia formation in the experimental site was predicted by reviewing historical data including dissolved oxygen (DO) in the bottom water, and other environmental conditions such as tidal range, wind speed and red tide incidence. A hypoxia prevention system that was composed of barriers against the hypoxic water intrusion and a micro-bubble generator for aeration was set in the experimental area (20m×20m), and time changes in DO concentration in the bottom water were monitored and compared with the time changes in the control area. The differences in survival rates of short-neck clams and contents of acid volatile sulfides in the sediment after the experiment were also compared between the experimental and control areas. Despite some troubles during the experiment it was revealed that the system mentioned above was effective for preventing hypoxia and for avoiding mass mortality of cultured short-neck clams at the Kama tidal flat.","subitem_description_type":"Abstract"}]},"item_2_full_name_3":{"attribute_name":"著者別名","attribute_value_mlt":[{"nameIdentifiers":[{"nameIdentifier":"15702","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Hirano, Keiji"}]},{"nameIdentifiers":[{"nameIdentifier":"15703","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Higano, Junya"}]},{"nameIdentifiers":[{"nameIdentifier":"15704","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Nakata, Hideaki"}]},{"nameIdentifiers":[{"nameIdentifier":"15705","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Shinagawa, Akira"}]},{"nameIdentifiers":[{"nameIdentifier":"15706","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Fujita, Takayasu"}]},{"nameIdentifiers":[{"nameIdentifier":"15707","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Tokuoka, Makoto"}]},{"nameIdentifiers":[{"nameIdentifier":"15708","nameIdentifierScheme":"WEKO"}],"names":[{"name":"Kogo, Keiichi"}]}]},"item_2_publisher_33":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"日本水産工学会"}]},"item_2_rights_13":{"attribute_name":"権利","attribute_value_mlt":[{"subitem_rights":"日本水産工学会"},{"subitem_rights":"本文データは学協会の許諾に基づきCiNiiから複製したものである"}]},"item_2_source_id_10":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN10278554","subitem_source_identifier_type":"NCID"}]},"item_2_source_id_7":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"09167617","subitem_source_identifier_type":"ISSN"}]},"item_2_version_type_16":{"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_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"平野, 慶二"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"日向野, 純也"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"中田, 英昭"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"品川, 明"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"藤田, 孝康"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"徳岡, 誠人"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"向後, 恵一"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2020-12-21"}],"displaytype":"detail","filename":"110007686902.pdf","filesize":[{"value":"1.6 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"110007686902.pdf","url":"https://nagasaki-u.repo.nii.ac.jp/record/3863/files/110007686902.pdf"},"version_id":"eda0961e-1371-4e6a-be91-5fd9fb11858d"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"Isahaya Bay","subitem_subject_scheme":"Other"},{"subitem_subject":"Short-neck Clam","subitem_subject_scheme":"Other"},{"subitem_subject":"Hypoxia","subitem_subject_scheme":"Other"},{"subitem_subject":"諌早湾","subitem_subject_scheme":"Other"},{"subitem_subject":"アサリ","subitem_subject_scheme":"Other"},{"subitem_subject":"へい死対策","subitem_subject_scheme":"Other"},{"subitem_subject":"貧酸素化","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"諫早湾のアサリ養殖場における夏季大量へい死対策 : 底層溶存酸素の改善試験","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"諫早湾のアサリ養殖場における夏季大量へい死対策 : 底層溶存酸素の改善試験"}]},"item_type_id":"2","owner":"2","path":["51"],"pubdate":{"attribute_name":"公開日","attribute_value":"2017-02-13"},"publish_date":"2017-02-13","publish_status":"0","recid":"3863","relation_version_is_last":true,"title":["諫早湾のアサリ養殖場における夏季大量へい死対策 : 底層溶存酸素の改善試験"],"weko_creator_id":"2","weko_shared_id":-1},"updated":"2023-05-16T03:27:43.515164+00:00"}