{"created":"2023-01-10T04:27:57.500215+00:00","id":2019589,"links":{},"metadata":{"_buckets":{"deposit":"d6b67b61-6c2e-4c13-8671-51e766e0c3d4"},"_deposit":{"created_by":8,"id":"2019589","owner":"8","owners":[8],"owners_ext":{"displayname":"ryukyu_lib","username":null},"pid":{"revision_id":0,"type":"depid","value":"2019589"},"status":"published"},"_oai":{"id":"oai:u-ryukyu.repo.nii.ac.jp:02019589","sets":["1642838158423:1642838158860:1642838161909","1642838403551:1642838411479"]},"author_link":[],"control_number":"2019589","item_1617186331708":{"attribute_name":"Title","attribute_value_mlt":[{"subitem_1551255647225":"琉球列島における外来淡水魚類の分布パターンと生活史特性：島嶼における効果的な外来種の管理に向けて","subitem_1551255648112":"ja"},{"subitem_1551255647225":"Distribution patterns and life-history traits of non-native freshwater fish in Ryukyu Archipelago: towards effective management of freshwater fish invasions in island's aquatic ecosystems","subitem_1551255648112":"en"}]},"item_1617186419668":{"attribute_name":"Creator","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"石川, 哲郎","creatorNameLang":"ja"}]}]},"item_1617186476635":{"attribute_name":"Access Rights","attribute_value_mlt":[{"subitem_1522299639480":"open access","subitem_1600958577026":"http://purl.org/coar/access_right/c_abf2"}]},"item_1617186626617":{"attribute_name":"Description","attribute_value_mlt":[{"subitem_description":"In the thesis, I explored distribution patterns, changes in biodiversity, life-history traits and its variability, and factors affecting establishment and dispersal success of non-native freshwater fish in Ryukyu Archipelago.\nIn chapter 1, I studied distribution patterns of non-native freshwater fish in islands of the Ryukyu Archipelago and examined changes in biodiversity by biological invasions. Distribution patterns of non-native freshwater fish can be explained by introduction reason and species richness of non-native freshwater fish correlated with population density rather than environmental variables. Analyses of beta diversity showed introductions of various ornamental aquarium fish in Okinawa-jima Island likely decrease total beta diversity of the most invaded island. Species contribution to beta diversities of native species were larger than that of non-native freshwater fish.\nIn chapter 2, I explored current status and distribution of non-native freshwater fish on Okinawa-jima Island, which is the most invaded island in Ryukyu Archipelago. I revealed currently at least 22 non-native freshwater fish are reproducing on Okinawa-jima Island. Distribution patterns and rates of range expansion of each species were clarified.\nIn chapter 3, I examined introduction history and establishment rates of non-native freshwater fish in Okinawa-jima Island. From the results obtained in this chapter, I predicted dumping of ornamental pet fish will continue in the future and recommended strict rules and measures to prevent future invasions via this most important pathway.\nIn chapter 4, I studied life history traits of non-native freshwater fish established on islands in Ryukyu Archipelago. First, I studied non-native fish in Haebaru Reservoir, on Okinawa-jima Island and targeted Coptodon zillii, Amatitlania nigrofaciata, Parambassis ranga, and clarified life history parameters such as growth, age composition, maturity and spawning season. Second, I explored life history variability of globally invasive freshwater fish, Oreochromis niloticus and Micropterus salmoides. I sampled O. niloticus in Yonaguni-jima Island, and compared life history with populations across the global distribution to clarify geographical variability of life history traits. Oreochromis niloticus showed greater life span compared to populations in other regions, and longer life span likely due to that O. niloticus are not exploited in Ryukyu Archipelago. Furthermore, I studied resource polymorphism (life history variability in a single population) of M. salmoides and reported sympatric occurrence of \"dwarf\" and \"normal\" forms of M. salmoides and causes and consequences of this novel resource polymorphism are discussed\nFinally, in chapter 5, I explored factors affecting establishment and dispersal success of non-native freshwater fish.","subitem_description_language":"en","subitem_description_type":"Abstract"}]},"item_1617186643794":{"attribute_name":"Publisher","attribute_value_mlt":[{"subitem_1522300295150":"ja","subitem_1522300316516":"琉球大学"},{"subitem_1522300295150":"en","subitem_1522300316516":"University of the Ryukyus"}]},"item_1617186702042":{"attribute_name":"Language","attribute_value_mlt":[{"subitem_1551255818386":"eng"}]},"item_1617187087799":{"attribute_name":"Dissertation Number","attribute_value_mlt":[{"subitem_1551256171004":"乙第59号"}]},"item_1617187112279":{"attribute_name":"Degree Name","attribute_value_mlt":[{"subitem_1551256126428":"博士（理学）","subitem_1551256129013":"ja"}]},"item_1617187136212":{"attribute_name":"Date Granted","attribute_value_mlt":[{"subitem_1551256096004":"2022-09-22"}]},"item_1617258105262":{"attribute_name":"Resource Type","attribute_value_mlt":[{"resourcetype":"doctoral thesis","resourceuri":"http://purl.org/coar/resource_type/c_db06"}]},"item_1617265215918":{"attribute_name":"Version Type","attribute_value_mlt":[{"subitem_1522305645492":"VoR","subitem_1600292170262":"http://purl.org/coar/version/c_970fb48d4fbd8a85"}]},"item_1617605131499":{"attribute_name":"File","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_access","date":[{"dateType":"Available","dateValue":"2023-01-10"}],"filename":"rikoron59abstract.pdf","filesize":[{"value":"1.4 MB"}],"mimetype":"application/pdf","url":{"objectType":"abstract","url":"https://u-ryukyu.repo.nii.ac.jp/record/2019589/files/rikoron59abstract.pdf"},"version_id":"8a02b6e1-eba8-49a1-89e1-3ac82a961f31"},{"accessrole":"open_access","date":[{"dateType":"Available","dateValue":"2023-01-10"}],"filename":"rikoron59review.pdf","filesize":[{"value":"2.2 MB"}],"mimetype":"application/pdf","url":{"objectType":"other","url":"https://u-ryukyu.repo.nii.ac.jp/record/2019589/files/rikoron59review.pdf"},"version_id":"29d5b2c2-1ab1-43ff-a335-244744bbaa8b"},{"accessrole":"open_access","date":[{"dateType":"Available","dateValue":"2023-01-10"}],"filename":"rikoron59dijest.pdf","filesize":[{"value":"56 KB"}],"mimetype":"application/pdf","url":{"objectType":"summary","url":"https://u-ryukyu.repo.nii.ac.jp/record/2019589/files/rikoron59dijest.pdf"},"version_id":"6fcdfb26-abf9-48b0-9535-4d201db98bf8"}]},"item_1617944105607":{"attribute_name":"Degree Grantor","attribute_value_mlt":[{"subitem_1551256015892":[{"subitem_1551256027296":"18001","subitem_1551256029891":"kakenhi"}],"subitem_1551256037922":[{"subitem_1551256042287":"琉球大学","subitem_1551256047619":"ja"},{"subitem_1551256042287":"University of the Ryukyus","subitem_1551256047619":"en"}]}]},"item_title":"琉球列島における外来淡水魚類の分布パターンと生活史特性：島嶼における効果的な外来種の管理に向けて","item_type_id":"59","owner":"8","path":["1642838161909","1642838411479"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2023-01-10"},"publish_date":"2023-01-10","publish_status":"0","recid":"2019589","relation_version_is_last":true,"title":["琉球列島における外来淡水魚類の分布パターンと生活史特性：島嶼における効果的な外来種の管理に向けて"],"weko_creator_id":"8","weko_shared_id":-1},"updated":"2023-01-10T05:03:55.036770+00:00"}