{"created":"2023-05-15T16:30:25.701247+00:00","id":1550,"links":{},"metadata":{"_buckets":{"deposit":"84b26c4a-5a54-45a7-8073-58be0caf5030"},"_deposit":{"created_by":2,"id":"1550","owners":[2],"pid":{"revision_id":0,"type":"depid","value":"1550"},"status":"published"},"_oai":{"id":"oai:nagasaki-u.repo.nii.ac.jp:00001550","sets":["35:36"]},"author_link":["7450"],"item_2_biblio_info_6":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2019-01-30","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"1","bibliographicPageEnd":"17","bibliographicPageStart":"9","bibliographicVolumeNumber":"34","bibliographic_titles":[{"bibliographic_title":"Ecological Research"}]}]},"item_2_description_4":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Long-term environmental stochasticity is known to affect the adaptive evolution of life history traits. In stochastic environments, there are two different levels of behavioral optimization, as follows: Level 1, the optimal strategy under an intrageneration stochastic environment and Level 2, the optimal strategy under an intergeneration stochastic environment. \nThis article presents a simple optimal foraging model under predation risks and verified the effect of behavioral optimization on the foraging time ratio. In this model, foragers are exposed to predation risks during foraging but are safe\nif they stay in their nests without any food. The foraging time allocation strategies that optimize the geometric mean fitness (Level 2) were compared with the arithmetic mean fitness (Level 1) to verify the effects of intergenerational stochasticity,whereby there is an alternation in good/bad environments across generations. As in previous studies, risk-averse strategies (a shorter foraging time is adopted for Level 2 than for Level 1) were commonly observed using this model. \nUnexpectedly, the model showed a tendency toward a preference for risk-prone strategies. This qualitative difference became prominent when food was abundant and the maximum energy reserves were small. \nTheoretical studies have shown that risk-averse strategies are commonly adopted during food shortages and result in starvation. However, the current results indicate that risk-prone strategies may become optimal under a limited reserve capacity. Thus, the optimal strategy depends not only on the individual status and environmental conditions, but also on the detailed selection regimes.","subitem_description_type":"Abstract"}]},"item_2_description_63":{"attribute_name":"引用","attribute_value_mlt":[{"subitem_description":"Ecological Research, 34(1), pp.9-17; 2019","subitem_description_type":"Other"}]},"item_2_publisher_33":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"John Wiley & Sons Australia, Ltd"}]},"item_2_relation_12":{"attribute_name":"DOI","attribute_value_mlt":[{"subitem_relation_type":"isIdenticalTo","subitem_relation_type_id":{"subitem_relation_type_id_text":"10.1111/1440-1703.1058","subitem_relation_type_select":"DOI"}}]},"item_2_rights_13":{"attribute_name":"権利","attribute_value_mlt":[{"subitem_rights":"c 2019 The Authors. Ecological Research published by John Wiley & Sons Australia, Ltd on behalf of The Ecological Society of Japan. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and　reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes."}]},"item_2_source_id_7":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"09123814","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":"Ito, Hiromu"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2020-12-18"}],"displaytype":"detail","filename":"EcoRes34_9.pdf","filesize":[{"value":"1.9 MB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"EcoRes34_9.pdf","url":"https://nagasaki-u.repo.nii.ac.jp/record/1550/files/EcoRes34_9.pdf"},"version_id":"ac2a5f00-8bd0-4382-94b2-7e63fda8c157"}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"adaptive behavior","subitem_subject_scheme":"Other"},{"subitem_subject":"foraging theory","subitem_subject_scheme":"Other"},{"subitem_subject":"geometric mean fitness","subitem_subject_scheme":"Other"},{"subitem_subject":"mathematical modeling","subitem_subject_scheme":"Other"},{"subitem_subject":"optimal behavior","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":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"Risk sensitivity of a forager with limited energy reserves in stochastic environments","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Risk sensitivity of a forager with limited energy reserves in stochastic environments"}]},"item_type_id":"2","owner":"2","path":["36"],"pubdate":{"attribute_name":"公開日","attribute_value":"2019-02-15"},"publish_date":"2019-02-15","publish_status":"0","recid":"1550","relation_version_is_last":true,"title":["Risk sensitivity of a forager with limited energy reserves in stochastic environments"],"weko_creator_id":"2","weko_shared_id":-1},"updated":"2023-05-16T04:00:27.084158+00:00"}