چكيده لاتين :
Abstracts: Thirty three Gyrodactylus spp. have been found on the gills and body
surface of both wild and farmed freshwater fishes in Iran. Among them, nine species
have been identified up to the species level, which are new locality records. The
identification of the others, mainly belong to endemic wild freshwater fishes, need
further studies. Among the known species, Gyrodactylus derjavini (Mikhailov, 1975)
has been found on the gills, caudal and anal fins of the Caspian salmon (5al/1/0 trutta
caspius) and rainbow trout (Oncorhyn chus mykiss) . These species are very harmful to
salmonid fingerling production industry of Iran. In warm water cultured fishes, G.
sprost ona, with widest host range, infects common carp tCyprinus carpio), Silver
carp tHyp ophtholmichthys molitrixi and big head carp (Aristichthys nobilis) in almost
all fish farms of Iran. Other species, which will be discussed here from their economic
importance and host specificity points of view, are G. cyprini, G, elegans, G, foss ilis,
G. kobaya shii, G. pr ostae, G. shulmani and G. stankov ici. Furthermore the
pathogenecity of Gyrodactylus spp are discussed and new technology (DNA
sequence) for precise identification of parasites is also recommended
