Monogenean Trematods of Chub Leuciscus Cephalus Albus Bonaparte, 1838 from the Lake Ohrid (Macedonia)

During the parasitological investigations on the gills of Leuciscus cephalus albus from Lake Ohrid (Macedonia), are found 4 monogenean species: Dactylogyrus sphyrna, Dactylogyrus folkmanovae, Dactylogyrus vistulae and Paradiplozoon ergensi. The total prevalence of infestation is 58,0% and the highest prevalence is of Dactylogyrus sphyrna (found in 26,0% of chubs). The average intensity of infestation is 5,50, and the highest level is that of Paradiplozoon ergensi. All monogenean species mentioned in this study represents a first record for the fishes from natural lakes in Macedonia, with the exception of Paradiplozoon ergensi, previously found in the Lake Ohrid. Among the monogenean species, found out in Lake Ohrid, the greatest pathological influence is associated with Dactylogyrus vistulae and Paradiplozoon ergensi.