The taxonomic research of eight populations of Sabanejewia balcanica from the water catchment area of the river Sava included the analysis of the meristic characteristics and pigmentation of their bodies. The analyzed sample contained 98 specimens collected in the areas of the rivers Turija, Gostelja, Brka, Suturlija, Suha, Tinja and Trebačka. The aim of this paper was to specify the meristic and pigment characteristics of this species at the location of the water catchment area of the river Sava, which are frequently used in describing new taxa. The meristic traits investigation included the analysis of the number of rays in dorsal, ventral, pectoral, anal and caudal fins. In the analysis of body pigmentation, the number and arrangement of suborbital spines, blotches or spots were determined. The results of this research indicated that there were no intrapopulation differences in Sabanejewia balcanica from the water catchment area of the river Sava in terms of meristic characteristic and body pigmentation. r © ©Bajrić, A., Adrović, A., Hajdarević, E., Skenderović, I., Tanović, E. (2018): Body pigmentation and meristic characteristics of Balkan golden loach (Sabanejewia balcanica) from the water catchment area of the river Sava.

The aim of this research is the analysis of the length-weight relationships and the condition factor of chub (Squalius cephalus L.) from certain rivers in northeastern Bosnia and Herzegovina that belong to the Black Sea basin. The research was conducted on 200 specimens of chub (Squalius cephalus L.) during 2019. The estimated values of the total body length ranged from 10.06 cm to 29.33 cm, with the mean body length of 15.97 cm in the total sample. The fish weight ranged from 8.0 g to 264.5 g, with the mean value of 46.8 g. The length-weight relationships of chub were determined in relation to their age classes. The fish in age classes 1+, 4+ and 5+ indicate a positive allometric growth (b > 3), while the fish in age classes 2+ and 3+ have a negative allometric growth (b < 3). The analysis of the coefficient of determination, R2, shows that the fish in age classes 1+ i 4+ have the highest values of this coefficient (> 0,9). ANOVA analysis of the condition factor of chub based on age classes indicates that there are no statistically significant differences in the distribution of this factor between the fish of the same age classes from different localities (P < 0.05).

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