寄生性カイアシ類イカリムシの稀な宿主，カジカ科魚類：兵庫県産カマキリにおける寄生例

抄録

Freshwater sculpins (Perciformes: Cottidae) are uncommon hosts of the lernaeid copepod Lernaea cyprinacea Linnaeus, 1758 worldwide, with its only one record from those sculpins (i.e., from the bullhead, Cottus gobio Linnaeus, 1758, in Scotland, U.K.). One and two postmetamorphic adult females of L. cyprinacea were collected each from two individuals of the fourspine sculpin, Rheopresbe kazika (Jordan & Starks, 1904), in the middle reaches of the Takeno River in Hyogo Prefecture, central Japan. The infected fish were sampled in a pool immediately downstream from a weir. Although the fourspine sculpin is a typical riffle dweller, the weir prevented the sampled fish from their upstream migration, and they most probably became infected with L. cyprinacea during their stay in the pool. The fourspine sculpin is endemic to Japan, and L. cyprinacea represents the first species of parasite found from the fish species.