The ichthyofauna composition of the wetland ecosystem in the Bardaca
area (Bosnia and Herzegovina) was described with the aim of indication
on the richness and necessary protection of the biodiversity of this sensi-
tive swamp region. During 2004, qualitative and quantitative fish
samplings were carried out, according to seasons, in Matura and Brzaja
rivers, the main tributaries of the drainage area around the Sava River.
Fish samplings were carried out using an electro–generator pulse and re-
moval method. Analysis of the sampled fishes consisted of species deter-
mination and estimation of yield for average density and biomass (N/m2
or m3 and g/m2 or m3). It could be said that during one year examina-
tions, the presence of 24 fish species from 7 families has been determi-
nate. In addition, the analysis of fish diversity was carried out by means
of species richness, Shanon–Weiner index, evenness and Simpson index.
According to analyzed data, it could be observed that 2 allochtonous pest
species, Carassius auratus gibelio and Ictalurus nebulosus presents the
most dominant fish species in these waters in almost all sampling sea-
sons.
