Infection with Peniculus minuticaudae (Copepoda: Pennellidae) on Threadsail Filefish (Stephanolepis cirrhifer) and Black Scraper (Thamnaconus modestus) Cultured in Japan

三重県南伊勢町地先の北太平洋で養殖されていたカワハギStephanolepis cirrhifer および大分県佐伯市上浦地先と蒲江地先の豊後水道でそれぞれ養殖されていたカワハギとウマヅラハギThamnaconus modestusの鰭から寄生性カイアシ類Peniculus minuticaudae Shiino, 1956の雌成虫を採集した。これは本寄生虫の養殖魚類および養殖カワハギ・ウマヅラハギからの初記録であるとともに，養殖魚類にペンネラ科カイアシ類の寄生を認めた2度目の事例である。本寄生虫は胸鰭と第2背鰭に多く見られ，次いで尾鰭と臀鰭の順に多く寄生していた。

Female adult specimens of the pennellid copepod Peniculus minuticaudae Shiino, 1956 were collected from the fins of two species of monacanthid fishes, threadsail filefish (Stephanolepis cirrhifer) and black scraper (Thamnaconus modestus), cultured in floating cages in Japan. These collections represent the first records of P. minuticaudae from farmed marine fishes as well as the first records of this copepod species from farmed S. cirrhifer and T. modestus. The finding of P. minuticaudae in this study is also the second record of pennellid copepods from maricultured fishes. Both the pectoral fins and the second dorsal fin were most heavily infected, followed by the caudal fin and the anal fin.