Published in Scientific Papers. Series D. Animal Science, Vol. LXVII, Issue 2
Written by Radoslava ZAHARIEVA, Diana KIRIN, Petya ZAHARIEVA
In the autumn of 2022, an ecologohelinological study was carried out on 41 and 70 fish specimens, respectively, from the Luda Yana River and the Chepelarska River, falling into the Maritsa River basin in the territory of Bulgaria. The fish from the Luda Yana River were caught from three places (indicated as biotopes) - Popinitsi, Svoboda, and Chernogorovo, and belong to 3 species (Orpheus dace, Squalius orpheus Kottelat & Economidis, 2006; Round-scaled barbel, Barbus cyclolepis Heckel, 1837 and Bleak, Alburnus alburnus Linnaeus, 1758). The fish from the Chepelarska River were caught from one place - the Katunitsa biotope and belong to 4 species (Sq. orpheus, B. cyclolepis, Alb. alburnus, Vardar nase Chondrostoma vardarense Karaman, 1928). In both studied rivers, the dominant fish species caught is Sq. orpheus. The species diversity of the parasites and their ecological indicators are indicated for the non-dominant fish species. New habitats and new hosts have been discovered for some of the established helminth species.
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