Comparative Composition of Spreča River Fauna (Bosnia and Herzegovina)

Abstract

Hydrobiological studies of the macroinvertebrates of the water catchment area of the river Spreča during 2019 revealed the presence of 60 taxa classified into 5 classes and 11 groups. Qualitative-quantitative analysis of the studied watercourses revealed different presence of individuals and taxa. The highest diversity was found in the samples of the Oskova River - 36, Spreča River - 28, while the lowest diversity was found in the Gostelja River (25). The results of the analysis showed the dominant participation of the Insecta class with 6 groups. Other established classes are represented by a smaller number of groups. The results of the diversity index indicate the heterogeneous composition of the macroinvertebrate communities. The highest values of the Shannon - Weaver Diversity Index were found on the Oskova River - Mačkovac locality. Cluster analysis showed that, in the presence of a number of taxa, the most similar localities on the Gostelja River are Križaljka and Stupari (L7 and L9) with a similarity percentage of 73.74%. On all other sites, the percentage of similarities was much smaller. Ichthyological analysis of the Spreče River basins revealed the presence of 24 fish species from 6 families.