{"created":"2023-06-19T07:30:28.423185+00:00","id":400,"links":{},"metadata":{"_buckets":{"deposit":"067e2e48-8269-40c0-830a-51ad69f0c79e"},"_deposit":{"created_by":3,"id":"400","owners":[3],"pid":{"revision_id":0,"type":"depid","value":"400"},"status":"published"},"_oai":{"id":"oai:nodai.repo.nii.ac.jp:00000400","sets":["47:48:94:95"]},"author_link":["2228","2227","2229","2226"],"item_1_biblio_info_12":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueNumber":"1","bibliographicPageEnd":"18","bibliographicPageStart":"10","bibliographicVolumeNumber":"55","bibliographic_titles":[{}]}]},"item_1_description_10":{"attribute_name":"抄録(日)","attribute_value_mlt":[{"subitem_description":"渓流魚におけるダムや遡上阻害物による棲息地分断は上流から下流へは移動できるが下流から上流への移動を制限する。そのような偏った移動の原因となる分断が,そこに棲息する生物において,上流で固定した弱有害遺伝子が下流全体に広がる事によって固定して適応度低下を生むか,数値シミュレーションを用いて解析した。その結果,上流から下流への一方的な流下が起こる場合,上流での弱有害遺伝子の固定による悪影響は上流だけにとどまらず,遡上障害物の上下流2個体群両方に広がり,上下流2個体群の適応度は下流にどれだけ大きな個体群が存在していても,上流に単一の個体群がある場合と同程度にまで減少することが分かった。更に,この適応度低下が下流から上流への人為的な運搬によってどの程度防げるかを検討し,たとえ小規模,小頻度の運搬であっても,集団の分断が起こっていない場合と同程度までリスクが減らせるほど効果が高いことを示した。このことから,遡上阻害物による分断で上流部に小集団が生まれた場合,下流から上流への人為的な運搬や,魚道の設置が望まれる。","subitem_description_type":"Other"}]},"item_1_description_11":{"attribute_name":"抄録(英)","attribute_value_mlt":[{"subitem_description":"Fragmentation of habitat can result in serious consequences for organisms. In particular for stream-dwelling fish, habitat fragmentation by dams or other artificial barriers limits their migration to only one way from upper to lower stream. This asymmetry in migration is unique to aquatic organisms and may result in problems that do not exist in terrestrial organisms. Among them, we analyze the fitness reduction by the fixation of harmful mutations using a numerical simulation model. In two population model, the fitness reduction depends almost entirely on the size of upper population, and is almost the same as one population model of a similar sized population. We show that artificial transport from lower to upper stream could greatly reduce the likelihood of the fixation of harmful mutation even if the amount or frequency of transport is small, and that the reduction of fitness becomes smaller than that without transporting. We also consider the influence of sex ratio of fish that are transported and find that it is not so large, but in the case of similar sex ratio between swimming down and transporting up, the fitness reduction becomes smaller. In conclusion, we recommend artificial transportations to upper stream over artificial dams or barriers.","subitem_description_type":"Other"}]},"item_1_description_13":{"attribute_name":"レポート・講演番号","attribute_value_mlt":[{"subitem_description":"E","subitem_description_type":"Other"}]},"item_1_description_15":{"attribute_name":"表示順","attribute_value_mlt":[{"subitem_description":"2","subitem_description_type":"Other"}]},"item_1_description_16":{"attribute_name":"アクセション番号","attribute_value_mlt":[{"subitem_description":"KJ00006290501","subitem_description_type":"Other"}]},"item_1_description_8":{"attribute_name":"記事種別(日)","attribute_value_mlt":[{"subitem_description":"論文","subitem_description_type":"Other"}]},"item_1_description_9":{"attribute_name":"記事種別(英)","attribute_value_mlt":[{"subitem_description":"Article","subitem_description_type":"Other"}]},"item_1_source_id_1":{"attribute_name":"雑誌書誌ID","attribute_value_mlt":[{"subitem_source_identifier":"AN00164184","subitem_source_identifier_type":"NCID"}]},"item_1_text_6":{"attribute_name":"著者所属(日)","attribute_value_mlt":[{"subitem_text_value":"東京農業大学生物産業学部水産資源管理学研究室 "},{"subitem_text_value":" 三重大学大学院生物資源学研究科個体群動態学研究室"}]},"item_1_text_7":{"attribute_name":"著者所属(英)","attribute_value_mlt":[{"subitem_text_language":"en","subitem_text_value":"Laboratory of Aquatic Management, Faculty of Bioindustry, Tokyo University of Agriculture "},{"subitem_text_language":"en","subitem_text_value":" Laboratory of Fish Population Dynamics, Faculty of Bioresources, Mie University"}]},"item_1_title_3":{"attribute_name":"論文名よみ","attribute_value_mlt":[{"subitem_title":"ケイリュウギョ ニ オケル コタイグンブンダン ニ キイン スル ジャクユウガイイデンシ ノ チクサン ニ ヨル テキセイドテイカ ニ カンスル リロンテキケンキュウ"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"金岩, 稔"},{"creatorName":"カネイワ, ミノル","creatorNameLang":"ja-Kana"}],"nameIdentifiers":[{"nameIdentifier":"2226","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"原田 泰志"},{"creatorName":"ハラダ, ヤスシ","creatorNameLang":"ja-Kana"}],"nameIdentifiers":[{"nameIdentifier":"2227","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Kanaiwa, Minoru","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"2228","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Harada Yasushi","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"2229","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":"2016-04-20"}],"displaytype":"detail","filename":"KJ00006290501.pdf","filesize":[{"value":"314.2 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"KJ00006290501.pdf","url":"https://nodai.repo.nii.ac.jp/record/400/files/KJ00006290501.pdf"},"version_id":"f94ee3c1-451d-4180-a86d-e97dc39c3d44"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"適応度低下 ","subitem_subject_scheme":"Other"},{"subitem_subject":" 遺伝子固定 ","subitem_subject_scheme":"Other"},{"subitem_subject":" 弱有害遺伝子 ","subitem_subject_scheme":"Other"},{"subitem_subject":" 個体群分断 ","subitem_subject_scheme":"Other"},{"subitem_subject":" 数理モデル","subitem_subject_scheme":"Other"},{"subitem_subject":"fitness reduction ","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":" genetic fixation ","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":" harmful mutation ","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":" habitat fragmentation ","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":" theoretical model","subitem_subject_language":"en","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":"渓流魚における個体群分断に起因する弱有害遺伝子の蓄積による適応度低下に関する理論的研究","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"渓流魚における個体群分断に起因する弱有害遺伝子の蓄積による適応度低下に関する理論的研究"},{"subitem_title":"Theoretical Study of Fitness Reduction in Stream-dwelling Fish by the Fixation of Slightly Harmful Mutations under Habitat Fragmentation","subitem_title_language":"en"}]},"item_type_id":"1","owner":"3","path":["95"],"pubdate":{"attribute_name":"公開日","attribute_value":"2010-06-25"},"publish_date":"2010-06-25","publish_status":"0","recid":"400","relation_version_is_last":true,"title":["渓流魚における個体群分断に起因する弱有害遺伝子の蓄積による適応度低下に関する理論的研究"],"weko_creator_id":"3","weko_shared_id":-1},"updated":"2023-06-19T07:53:34.954494+00:00"}