Helminth communities of Silurus glanis and its bioindicator signification for the condition of the Ivaylovgrad Reservoir, Bulgaria

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Helminth communities of Silurus glanis and its bioindicator signification for the condition of the Ivaylovgrad Reservoir, Bulgaria

Biodiversity and ecological particularities of the parasite communities of the wels catfish (Silurus glanis L., 1758) from the Ivaylovgrad Reservoir were studied during 2013. Eleven specimens of S. glanis were examined with standard techniques for parasites and heavy metal contamination. The purpose of this research is to represent new data for the biodiversity, prevalence, intensity and mean intensity, mean abundance of parasite communities of S. glanis from the Ivaylovgrad Reservoir. Concentration of heavy metals (Pb, Zn, Cu) in fish (muscle, liver, intestines and bones), some endohelminth species as bioindicators and bottom sediments were analyzed. The obtained results for the parasite communities of S. glanis correspond and are in close connection with dependence of the biology and ecology of the determined species of helminthes and the place of the intermediate hosts as bioindicators for the status of the studied natural freshwater ecosystems. The results may be applied in the various monitoring systems for assessment and forecast of the Ivaylovgrad Reservoir condition

Keywords:

parasite communities, heavy metals, bioindication Silurus glanis,

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