Parasite Fauna of Chub (Squalius squalus Bonaparte, 1837) from Lake Ohrid (Fyrmacedonia)

During the parasitological investigations on Squalius squalus from Lake Ohrid (FYRMacedonia), 13 parasite species: Myxobolus muelleri, Dactylogyrus sphyrna, D. folkmanovae, D. vistulae, Paradiplozoon ergensi, Allocreadium isoporum, Ligula intestinalis (plerocerkoid), Philometra ovata, Raphidascaris acus, Contracaecum microcephalum (larva), Metechinorhynchus truttae, Acanthocephalus anguillae and Pomphorhynchus bosniacus were found. The total prevalence of infestation is 77.87% and the highest prevalence is of Pomphorhynchus bosniacus (found in 42.13% of chubs). The average intensity of infestation is 6.51, and the highest level is that of Allocreadium isoporum (5.83). Findings of Myxobolus muelleri, Allocreadium isoporum and Acanthocephalus anguillae represent first record for Squalius squalus from Lake Ohrid. Among the parasite species found out in chub from it, the greatest pathological influence is associated with Dactylogyrus vistulae, Paradiplozoon ergensi, Ligula intestinalis (plerocercoid), Metechinorhynchus truttae and Pomphorhynchus bosniacus.