A checklist of the parasites of medaka (Oryzias latipes) of Japan (1929-2012), with new records of Lernaea cyprinacea (Copepoda: Lernaeidae)in wild populations of medaka in Japan
1929～2012年に出版された情報に基づくと,日本産メダカから得られた寄生虫18種(繊毛虫類5種,条虫類1種,吸虫類7種,線虫類2種,二枚貝類1種,カイアシ類1種,エラオ類1種)が種まで同定されていた.また,繊毛虫類,吸虫類,単生類,ダニ類に未同定の寄生虫がみられた.カイアシ類のイカリムシLernaea cyprinaceaが奈良県,大阪府,福岡県,佐賀県の野生メダカから得られ,新採集記録として示した.繊毛虫類のCyclochaeta fujitai がメダカから報告されていたが,近年,Cyclochaeta 属はTrichodina 属の新参異名として扱われているので,本目録でTrichodina 属に移した.メダカの寄生虫に関する今後の研究課題を論じた.The medaka or Japanese rice fish, Oryzias latipes (Temminck & Schlegel, 1846), is a small adrianichthyid fish and occurs in Far East Asia, including Japan, Korea, Taiwan and China. This species is held as a pet at homes and schools in Japan and is also used as a model animal in laboratories over the world. Based on the literature published between 1929 and 2012, information on the parasites of medaka from Japan is assembled. A total of 18 nominal species of the following protistan and metazoan parasites have been reported: Ciliophora (5 species), Cestoda (1), Trematoda (7), Nematoda (2), Bivalvia (1), Copepoda (1) and Branchiura (1). Information on the parasites not identified to species level is also given, including those of Ciliophora, Trematoda, Monogenea and Acari. The lernaeid copepod Lernaea cyprinacea Linnaeus, 1758 is newly recorded from wild populations of medaka from Nara and Osaka prefectures (central Honshu) and Fukuoka and Saga prefectures (northern Kyushu). The trichodinid ciliate Cyclochaeta fujitai Suzuki, 1950 was recorded from medaka, but this parasite is transferred herein to the genus Trichodina as Trichodina fujitai (Suzuki, 1950) n. comb. because Cyclochaeta has been regarded as a junior synonym of Trichodina
