摘要：Wild-caught fishes were examined from the Muskingum River in southeastern Ohio for the prevalence of glochidial infestation. Weekly collections over a 24-hour period for one year yielded 22 fish species (2,097 individuals). Six species (27%) were infested with glochidia—channel catfish, freshwater drum, gizzard shad, orange-spotted sunfish, bluegill, and hybrid Morone. Infestations were found during the months of March through August, and no infested fish were found during the months of September through February. The month with the highest number of infested fish species was August, and the lowest number occurred in April. The percentage of all individuals infested with glochidia was very low, 2.5%, but was similar to that reported for other rivers and higher that reported for most lakes. The percentage of all fish species infested was lower than those reported for rivers but still greater than the results for lakes. The impounded study site seems to fall between a unregulated river and a lake in terms of its prevalence of infested fishes. The glochidia were over-dispersed in the host populations; 100% of the infested species had 50% or fewer of their individuals infested. The mussel faunal assemblage at the study site appeared to be driven primarily by the presence of a single fish, freshwater drum, and not by the relative abundance of the fish species available.
