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A total of 270 individuals of eight species (seven native and one exotic species) were captured in the study area. Japanese medaka was predominant fish in the irrigation-ditch. The density and population size of medaka were estimated at 4.9 individuals per \u33a1 and ca. 9,000\uff5e12,000 individuals, respectively. Comparisons of the population data between successive years suggested that the medaka population around paddy fields had drastically decreased after abandonment of cultivation.","subitem_description_type":"Abstract"}]},"item_10_description_30":{"attribute_name":"\u8cc7\u6e90\u30bf\u30a4\u30d7\uff08\u30b3\u30f3\u30c6\u30f3\u30c4\u306e\u7a2e\u985e\uff09","attribute_value_mlt":[{"subitem_description":"Article","subitem_description_type":"Other"}]},"item_10_description_5":{"attribute_name":"\u5f15\u7528","attribute_value_mlt":[{"subitem_description":"\u4fe1\u5dde\u5927\u5b66\u6559\u80b2\u5b66\u90e8\u9644\u5c5e\u5fd7\u8cc0\u81ea\u7136\u6559\u80b2\u7814\u7a76\u65bd\u8a2d\u7814\u7a76\u696d\u7e3e (40): 29-32(2003)","subitem_description_type":"Other"}]},"item_10_publisher_4":{"attribute_name":"\u51fa\u7248\u8005","attribute_value_mlt":[{"subitem_publisher":"\u4fe1\u5dde\u5927\u5b66\u6559\u80b2\u5b66\u90e8"}]},"item_10_source_id_35":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0389-9128","subitem_source_identifier_type":"ISSN"}]},"item_10_source_id_40":{"attribute_name":"\u66f8\u8a8c\u30ec\u30b3\u30fc\u30c9ID","attribute_value_mlt":[{"subitem_source_identifier":"AA11520449","subitem_source_identifier_type":"NCID"}]},"item_creator":{"attribute_name":"\u8457\u8005","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"\u5317\u91ce,  \u8061"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"\u5c71\u5f62,  \u54f2\u4e5f"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"\u5e02\u5ddd,  \u5bdb"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"\u5c0f\u6797,  \u5c1a"}],"nameIdentifiers":[{}]}]},"item_files":{"attribute_name":"\u30d5\u30a1\u30a4\u30eb\u60c5\u5831","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"2015-09-24"}],"displaytype":"detail","filename":"Shiga40-04.pdf","filesize":[{"value":"396.1 kB"}],"format":"application/pdf","licensetype":"license_note","mimetype":"application/pdf","url":{"label":"Shiga40-04.pdf","url":"https://soar-ir.repo.nii.ac.jp/record/2224/files/Shiga40-04.pdf"},"version_id":"d63d7cb9-b05e-438e-83b1-315da1466720"}]},"item_language":{"attribute_name":"\u8a00\u8a9e","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"\u8cc7\u6e90\u30bf\u30a4\u30d7","attribute_value_mlt":[{"resourcetype":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"\u9577\u91ce\u770c\u5317\u90e8\u306e\u6c34\u7530\u7528\u6c34\u8def\u306b\u751f\u606f\u3059\u308b\u6de1\u6c34\u9b5a\u985e\uff1a\u8015\u4f5c\u653e\u68c41\u5e74\u5f8c\u306e\u72b6\u6cc1","item_titles":{"attribute_name":"\u30bf\u30a4\u30c8\u30eb","attribute_value_mlt":[{"subitem_title":"\u9577\u91ce\u770c\u5317\u90e8\u306e\u6c34\u7530\u7528\u6c34\u8def\u306b\u751f\u606f\u3059\u308b\u6de1\u6c34\u9b5a\u985e\uff1a\u8015\u4f5c\u653e\u68c41\u5e74\u5f8c\u306e\u72b6\u6cc1"}]},"item_type_id":"10","owner":"1","path":["150/152/225/238"],"pubdate":{"attribute_name":"\u516c\u958b\u65e5","attribute_value":"2009-02-27"},"publish_date":"2009-02-27","publish_status":"0","recid":"2224","relation_version_is_last":true,"title":["\u9577\u91ce\u770c\u5317\u90e8\u306e\u6c34\u7530\u7528\u6c34\u8def\u306b\u751f\u606f\u3059\u308b\u6de1\u6c34\u9b5a\u985e\uff1a\u8015\u4f5c\u653e\u68c41\u5e74\u5f8c\u306e\u72b6\u6cc1"],"weko_creator_id":"1","weko_shared_id":null},"updated":"2021-03-01T14:34:37.302204+00:00"}