Analyses of physical, chemical and biological parameters of the Jezeračka River were
conducted in 2020. Given that the planning documents of the Republic of Srpska recognized
these natural spawning grounds of Salmo trutta as a potentially protected zone, the aim of the
paper was to evaluate ecological and biological water properties of our target river and its
surrounding area. Following the application of standard methods, biological research covered
microbiological analyses and the analyses of phytobenthos, periphyton, macrozoobenthos,
ichthyofauna and flora. Values of the analyzed physical-chemical and sanitary-microbiological
parameters suggested that the water quality of the Jezeračka River was 1st class. Analyses
based on the qualitative and quantitative composition of the phytobenthos, periphyton,
macrozoobenthos and ichthyofauna community indicated that the water was of the 1st class
quality and qualified for the high ecological status. The well-preserved autochthonous flora
and vegetation along the riverbank are favorable to the water quality maintenance. Results
imply that biological and ecological conditions are suitable for life and spawning of Salmo
trutta and that the upper Jezeračka River stream, the natural spawning grounds of the species,
meets all requirements to preserve and improve Salmo trutta population.
