DAO 66:171-173 (2005) - doi:10.3354/dao066171
First record of ostracods as natural intermediate hosts of Anguillicola crassus, a pathogenic swimbladder parasite of eels Anguilla spp.
Frantisek Moravec1,*, Kazuya Nagasawa2, Munenori Miyakawa3
ABSTRACT: The ostracod Physocypria nipponica (Ostracoda: Candonidae) was found (prevalence 14.2%) to be the only intermediate host of the nematode Anguillicola crassus (Nematoda: Anguillicolidae), a pathogenic swimbladder parasite of eels, in a greenhouse-heated culture pond at Isshiki, Aichi Prefecture, Japan. Japanese eels Anguilla japonica from the same pond were found to be infected by adult A. crassus (prevalence 71.8%, intensity 1 to 6). This indicates that A. crassus could complete its life cycle under conditions of modern eel-culture technology where copepods were absent due to the unfavorable water quality for them, by utilizing ostracods as the intermediate host.
KEY WORDS: Ostracoda · Physocypria nipponica · Intermediate host · Parasitic nematode · Anguillicola crassus · Japanese eel &mid