Published in Scientific Papers. Series D. Animal Science, Vol. LX
Written by Mariya CHUNCHUKOVA, Diana KIRIN, Dimitrinka KUZMANOVA, Sonya SHUKEROVA
During 2016, 45 specimens of freshwater bream (Abramis brama (Linnaeus, 1758)) are collected and examined from the Danube River. Helminth parasites are recorded in 29 freshwater bream specimens (64.44%) from the Danube River. Five species of parasites were identified: one trematode species (Asymphylodora imitans (Mühling, 1898)), three acantocephalans (Acanthocephalus lucii (Müller, 1776), Acanthocephalus anguillae (Müller, 1780), Pomphorhynchus tereticollis (Rudolphi, 1809)) and one nematode species (Raphidascaris acus, (Bloch, 1779), larvae). In the component community of Abramis brama from Danube River A. imitans and A. lucii are core species. P. tereticollis is component parasite species for the helminth communities of freshwater bream. A. lucii and R. acus are accidental parasite species for the helminth communities of A. brama. New data for the lead contents in sediments, parasites, tissues and organs of freshwater bream from the Danube River are presented. From the tissues and organs of the studied fish specimens Abramis brama, the lowest concentrations of lead were found in the muscles. The content of lead in the samples of skin and liver are higher than in the muscles. The acanthocephalan Pomphorhynchus tereticollis showed significantly higher content of lead than its host organs. Bioconcentration factor for lead (Pb) in the tissues and organs of freshwater bream were presented and discussed with respect to their content in sediments. Very significant correlation (p<0.001) was fixed for relationship between P. tereticollis Pb -Sediments Pb.
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