The invasive round goby Apollonia melanostoma (Actinopterygii: Gobiidae) - a new intermediate host of the trematode Neochasmus umbellus (Trematoda: Cryptogonimidae) in Lake Erie, Ohio, USA.

摘要

The skin, fins, gills and muscles, brain, eyes, gut, liver, spleen, kidneys, body cavity and mesentery of 30 round goby A melanostoma, 15 white perch (Morone americana), 17 white bass (M. chrysops) and 10 emerald shiner (Notropis atherinoides) were examined for metazoan parasites. Metacercariae were identified in the muscle, eye and brain tissues of the round goby, as well as in muscles of the emerald shiner. The round goby was found to be a newly described host for Neochasmus umbellus. The muscles were the predominant location for metacercariae, that rarely appeared in the bain or eyes. Adult N. umbellus was identified in the intestines of Moronidae (white bass and white perch). Examination of white perch specimens yielded two immature specimens of N. umbellus in the gut. However, white bass specimens were infected with greater numbers of N. umbellus.