Nagasawa, K., M. Nitta & K. Kawai. (2023). First specimen-based record of Argulus japonicus (Branchiura: Argulidae), an ectoparasite of freshwater fishes, from Okayama Prefecture, western Japan. Biogeography. 25:19-21.

477675

10.11358/biogeo.25.19 [view]

Nagasawa, K., M. Nitta & K. Kawai

2023

25:19-21.

Publication

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An argulid branchiran is known to infect carp Cyprinus carpio Linnaeus, 1758 farmed in Okayama Prefecture, western Japan, but no species identifcation has been made to date. A male of Argulus japonicus Thiele, 1900 was collected from the body surface of a pale chub Opsariichthys platypus (Temminck & Schlegel, 1846) (Cyprinidae) in the Seno-o River, a tributary of the Kurashiki River, Okayama Prefecture. The specimen collected is briefly described and reported herein as the first specimen-based record for A. japonicus from this prefecture. The collection site was the middle-reaches of the Seno-o River flowing through a residential area, where the current was very slow due to a sluice gate installed downstream and only cyprinids including pale chub were collected. This indicates that A. japonicus can maintain its population in such lentic waters utilizing cyprinids as its hosts.

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