Prevalence of parasites of salmonids Onchorynchus spp. in the Shiretoko Peninsula, Hokkaido, Japan

• Main Authors: 太田, 素良, HIRATA, Haruyuki, 平田, 晴之, 浅川, 満彦, ASAKAWA, Mitsuhiko
• Format: Other/Unknown Material
• Language: Japanese
• Published: 知床博物館
• Subjects: Keta; Ursus arctos
• Online Access: https://rakuno.repo.nii.ac.jp/record/7024/files/2022-a-10_asakawa.pdf

Article Recently, it was revealed that a natural host for the responsible agent, Dibothriocephalus nihonkaiensis (syn. Diphyllobothrium nihonkaiense) of the zoontic diphyllobothriasis in Japan is brown bears (Ursus arctos), but its prevalence of their larval stages (plerocercoids) in its 2nd intermediate hosts was unknown. Hence, we performed a preliminary examination of harboring parasites including the plerocercoids with salmonids including Onchorynchus gorbuscha (n=10) and O. keta (n=10) caught at Shari Town in the Shiretoko Peninsula, Hokkaido, between Sep. and Oct., 2020. Then, we could not find any plerocercoids from the fishes, although Anisakis simplex and Lepeophtherius salmonis were obtained from almost all materials. journal article