| Popis: |
As many as 1,079 specimens of the branchiuran parasite Argulus japonicus Thiele, 1900 were found on the body surface of an Amur catfish Silurus asotus in Ehime Prefecture, Shikoku, central Japan. This finding constitutes the first documented record of A. japonicus from Shikoku. Silurus asotus is a new host. The sex ratio in the sample of A. japonicus was male-biased. Among various skin regions of the fish, both the lateral area of the anterior trunk and the dorsal area of the head were most abundantly infected, and the dermal tissues in these areas were exposed externally. |
