{"created":"2023-05-15T15:17:01.735781+00:00","id":3037,"links":{},"metadata":{"_buckets":{"deposit":"8e766d32-c73c-410f-ab7e-169bfb60560b"},"_deposit":{"created_by":12,"id":"3037","owners":[12],"pid":{"revision_id":0,"type":"depid","value":"3037"},"status":"published"},"_oai":{"id":"oai:obihiro.repo.nii.ac.jp:00003037","sets":["242:243"]},"author_link":["8"],"item_6_alternative_title_1":{"attribute_name":"その他（別言語等）の研究課題名","attribute_value_mlt":[{"subitem_alternative_title":"Predation rates of spiders on a mirid bug in organic rice paddies : an approach using molecular gut-content analysis","subitem_alternative_title_language":"en"}]},"item_6_description_10":{"attribute_name":"研究代表者番号","attribute_value_mlt":[{"subitem_description":"10466807","subitem_description_type":"Other"}]},"item_6_description_11":{"attribute_name":"研究機関","attribute_value_mlt":[{"subitem_description":"東京大学","subitem_description_language":"ja","subitem_description_type":"Other"}]},"item_6_description_13":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"本研究は、害虫DNAマーカーを用いた土着天敵の胃内容分析を行うことで、環境保全型水田に生息するイネ害虫アカスジカスミカメ(以下アカスジ)が土着天敵であるクモ類に捕食されているかを確かめ、その捕食数を定量化することを目的とした。環境保全型水田におけるクモ類によるアカスジ捕食数を推定するため、多数の水田から採集したクモ類の胃内容分析と、アカスジ1匹を捕食した後のDNA検出時間推定のための室内実験を行った。\n水田内で優占している3グループのクモを対象に、クモ1個体あたり・1日あたりのアカスジ捕食数を推定したところ、その値は水田間で大きく異なったものの、最大でコモリグモ類で0.04、アシナガグモ類で0.03、アゴブトグモで0.07となり、各クモグループによるアカスジ捕食数は極めて低かった。そのため現状では、クモ類のみによるアカスジ密度の抑制効果を期待するのは難しいだろう。こうしたクモ類の害虫抑制効果を高めるには、水田生態系における天敵の多様性を増加させる管理を行うことが必要であると考えられた。","subitem_description_language":"ja","subitem_description_type":"Abstract"},{"subitem_description":"The predation rates of three groups of spiders (Lycosidae, Tetragnatha spp. and Pachygnatha clercki) on the mirid bug Stenotus rubrovittatus (Hemiptera: Miridae) in organic rice paddies were evaluated using DNA-based gut-content analysis. The bug predation rates per day per individual spider in the field can be estimated using the detection period of prey’s DNA obtained from the laboratory feeding trials, and the rate of spiders that is positive for a bug’s DNA at a given time in the field obtained in the DNA analysis of the field samples.\nIn total, 1,199 field spiders were assayed among three groups that differ in preferred microhabitats as well as predation habits, revealing that predation rates significantly increased with the density of prey irrespective of group. Our estimates revealed that a maximum of 0.03-0.07 of spiders feed on the mirid bug, which corresponds to one adult per day. This low frequency of predation may indicate the difficulty in suppressing mirid bug density by spider predation alone in organic paddy fields. To enhance the role of spiders as biocontrol agents, some additional management strategies must be implemented, such as increasing the diversity of spiders in paddy ecosystems.","subitem_description_language":"en","subitem_description_type":"Abstract"}]},"item_6_description_14":{"attribute_name":"内容記述","attribute_value_mlt":[{"subitem_description":"2008年度～2009年度科学研究費補助金若手研究(スタートアップ)研究成果報告書","subitem_description_language":"ja","subitem_description_type":"Other"}]},"item_6_description_19":{"attribute_name":"フォーマット","attribute_value_mlt":[{"subitem_description":"application/pdf","subitem_description_type":"Other"}]},"item_6_description_9":{"attribute_name":"研究課題番号","attribute_value_mlt":[{"subitem_description":"20880011","subitem_description_type":"Other"}]},"item_6_text_12":{"attribute_name":"助成元","attribute_value_mlt":[{"subitem_text_language":"ja","subitem_text_value":"科学研究費助成事業"}]},"item_6_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_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2018-01-30"}],"displaytype":"detail","filename":"20880011seika.pdf","filesize":[{"value":"393.1 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"20880011seika.pdf","url":"https://obihiro.repo.nii.ac.jp/record/3037/files/20880011seika.pdf"},"version_id":"129e218d-cd78-48ee-a415-60ab4f8d3e29"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"クモ類","subitem_subject_language":"ja","subitem_subject_scheme":"Other"},{"subitem_subject":"斑点米カメムシ","subitem_subject_language":"ja","subitem_subject_scheme":"Other"},{"subitem_subject":"捕食被食関係","subitem_subject_language":"ja","subitem_subject_scheme":"Other"},{"subitem_subject":"有機農業","subitem_subject_language":"ja","subitem_subject_scheme":"Other"},{"subitem_subject":"害虫","subitem_subject_language":"ja","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_researcher":{"attribute_name":"研究代表者","attribute_type":"creator","attribute_value_mlt":[{"creatorAffiliations":[{"affiliationNameIdentifiers":[{"affiliationNameIdentifierScheme":"ISNI","affiliationNameIdentifierURI":"http://www.isni.org/isni/"}],"affiliationNames":[{"affiliationNameLang":"ja"}]}],"creatorNames":[{"creatorName":"Takada, Mayura","creatorNameLang":"en"},{"creatorName":"高田, まゆら","creatorNameLang":"ja"}],"familyNames":[{},{}],"givenNames":[{},{}],"nameIdentifiers":[{},{}]}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"research report","resourceuri":"http://purl.org/coar/resource_type/c_18ws"}]},"item_title":"DNAマーカーを用いた胃内容分析による環境保全型水田における土着天敵の役割の評価","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"DNAマーカーを用いた胃内容分析による環境保全型水田における土着天敵の役割の評価","subitem_title_language":"ja"}]},"item_type_id":"6","owner":"12","path":["243"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2010-12-27"},"publish_date":"2010-12-27","publish_status":"0","recid":"3037","relation_version_is_last":true,"title":["DNAマーカーを用いた胃内容分析による環境保全型水田における土着天敵の役割の評価"],"weko_creator_id":"12","weko_shared_id":-1},"updated":"2023-08-29T08:57:10.938740+00:00"}