{"created":"2023-09-20T08:03:52.252698+00:00","id":2007918,"links":{},"metadata":{"_buckets":{"deposit":"4e565e08-e035-4c01-81f7-9a9707bb0261"},"_deposit":{"created_by":18,"id":"2007918","owner":"18","owners":[18],"pid":{"revision_id":0,"type":"depid","value":"2007918"},"status":"published"},"_oai":{"id":"oai:repository.dl.itc.u-tokyo.ac.jp:02007918","sets":["27:2466:2467:1695196808174","9:504:2469:1695196682189"]},"author_link":[],"item_4_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2023","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"25","bibliographicPageStart":"1","bibliographicVolumeNumber":"149","bibliographic_titles":[{"bibliographic_title":"東京大学農学部演習林報告","bibliographic_titleLang":"ja"},{"bibliographic_title":"Bulletin of The University of Tokyo Forests","bibliographic_titleLang":"en"}]}]},"item_4_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"ヤツバキクイムシの繁殖は，豊富な餌資源が供給される大規模な風害の前後で大きく異なると推測される。そこで本研究では，風害による餌条件の変化が繁殖に及ぼす影響を明らかにするために，フェロモントラップを用いた成虫の発生消長の調査と，エゾマツの伐採木・餌木丸太および風害における発育と繁殖状況の調査をエゾマツ天然林で行った。風害翌年には餌資源の量が増えた結果，時間的に変化する好適な部位を選択的に利用した結果，母孔密度が減少し，平均母孔長と繁殖率が増加した。母孔あたり産卵数の増加と質の良い餌を利用することによる幼虫の死亡率の減少が，繁殖率の増加の原因と推測された。調査地において，通常，本種は年1 化と考えられたが，風害後の1999 年には一部年2 化が出現した。先行研究の結果をあわせると，大規模な風害により大量の餌資源が発生すると，寄生密度が下がることと，質の良い餌を利用することによって年2 化が生じる可能性が示唆された。","subitem_description_language":"ja","subitem_description_type":"Abstract"},{"subitem_description":"Reproductive manners of the spruce bark beetle Ips typographus japonicus may vary between before and after a large-scale wind-disturbance, which produce a large amount of food resources. To examine the effects of the changes in the abundance of breeding substrates on attack density and reproductive success of the species, I investigated the abundance and reproductive status of I. typographus japonicas on the experimentally installed downed logs in a hemiboreal natural forest pre-dominated by Pieca jezoensis before and after a large-scale wind-disturbance. In the following year of wind disturbance, position utilized by I. typographus japonicus changed with season depending on speed of deterioration. The attack density (number of egg galleries per bark area) greatly decreased, whereas length of mother gallery and the reproductive rate (number of survived adults per gallery) increased. Increased number of eggs per gallery and decreased larval mortality was a possible causes of the increase in reproductive rate. Although I. typographus japonicas basically spends one generation per year in the research site, results of this study and previous studies suggested that the 2nd generation appeared in the year following large-scale wind-disturbance. Decreased attack density and high-quality food resources probably induced the partial bivoltine of I. typographus","subitem_description_language":"en","subitem_description_type":"Abstract"}]},"item_4_description_6":{"attribute_name":"内容記述","attribute_value_mlt":[{"subitem_description":"原著論文","subitem_description_language":"ja","subitem_description_type":"Other"}]},"item_4_publisher_20":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"東京大学大学院農学生命科学研究科附属演習林","subitem_publisher_language":"ja"},{"subitem_publisher":"The University of Tokyo Forests","subitem_publisher_language":"en"}]},"item_4_source_id_10":{"attribute_name":"書誌レコードID","attribute_value_mlt":[{"subitem_source_identifier":"AN00162451","subitem_source_identifier_type":"NCID"}]},"item_4_source_id_8":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"03716007","subitem_source_identifier_type":"ISSN"}]},"item_4_text_4":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_language":"ja","subitem_text_value":"東京大学大学院農学生命科学研究科附属演習林北海道演習林"},{"subitem_text_language":"en","subitem_text_value":"The University of Tokyo Hokkaido Forest, Graduate School of Agricultural and Life Sciences, The University of Tokyo"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorAffiliations":[{"affiliationNames":[{"affiliationName":"東京大学","affiliationNameLang":"ja"},{"affiliationName":"The University of Tokyo","affiliationNameLang":"en"}]}],"creatorNames":[{"creatorName":"井口, 和信","creatorNameLang":"ja"},{"creatorName":"IGUCHI, Kazunobu","creatorNameLang":"en"}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_access","date":[{"dateType":"Available","dateValue":"2023-09-20"}],"displaytype":"detail","filename":"esrh149001.pdf","filesize":[{"value":"3 MB"}],"format":"application/pdf","licensetype":"license_note","url":{"url":"https://repository.dl.itc.u-tokyo.ac.jp/record/2007918/files/esrh149001.pdf"},"version_id":"d651060b-b907-491e-bcc9-f224c5f0f9ce"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"ヤツバキクイムシ","subitem_subject_language":"ja","subitem_subject_scheme":"Other"},{"subitem_subject":"餌資源量","subitem_subject_language":"ja","subitem_subject_scheme":"Other"},{"subitem_subject":"母孔密度","subitem_subject_language":"ja","subitem_subject_scheme":"Other"},{"subitem_subject":"繁殖率","subitem_subject_language":"ja","subitem_subject_scheme":"Other"},{"subitem_subject":"年2化","subitem_subject_language":"ja","subitem_subject_scheme":"Other"},{"subitem_subject":"Spruce bark beetle(Ips typographus japonicus)","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"food resource quantity","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"egg gallery density","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"reproductive rate","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"bivoltine","subitem_subject_language":"en","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":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"風害による餌資源量の増加がヤツバキクイムシの繁殖に及ぼす影響","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"風害による餌資源量の増加がヤツバキクイムシの繁殖に及ぼす影響","subitem_title_language":"ja"},{"subitem_title":"Effects of increased food resources due to a wind-disturbance on reproduction of a spruce bark beetle (Ips typographus japonicus NIIJIMA)","subitem_title_language":"en"}]},"item_type_id":"4","owner":"18","path":["1695196682189","1695196808174"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2023-09-20"},"publish_date":"2023-09-20","publish_status":"0","recid":"2007918","relation_version_is_last":true,"title":["風害による餌資源量の増加がヤツバキクイムシの繁殖に及ぼす影響"],"weko_creator_id":"18","weko_shared_id":-1},"updated":"2023-09-20T08:21:10.286645+00:00"}