UDK 595.384.1(282)(497.6 Prača) In Bosnia and Herzegovina, noble crayfish (Astacus Astacus) can be found in the Sava River basin (rivers Bosna, Drina) and Adriatic basin (Cetina river) and it has been introduced in the Rama Lake and some accumulations in the Bosna River (Trozic- Borovac, 2011). The paper represents an overview of some morphological characteristics (W, TL, SL, CL, CW, CH), while condition indices were also calculated. The analysis of the noble crayfish was done in Prača River (Hrenovica site) in June and July 2009. The maximum-recorded length of the crayfish is 12.73 cm, and of 87 g (male) weight. We concluded that individuals vary mostly in body weight, and the least in body length. Out of the 30 analyzed specimens, males dominate (21:9) which results from the time/period of research. The values of condition index point to favorable conditions in Prača River for the existence of the species Astacus astacus.

Inter-population variability in morphological traits and fecundity of Alburnus alburnus (Linnaeus, 1758) from Bosnia and Herzegovina was analysed in this study. The results of the analyses based on 21 standard measurements and six meristic characters have shown the highest variation between distance between pelvic (ventral) fins and anal aperture. Analysis of variance (ANOVA) indicate statistically significant differences between six populations. Differences among meristic characters have been tested by Multiple Comparisons Kruskal-Wallas. Obtained results indicate statistically significant difference among samples for number of branched rays for caudal fin (KA/Ca), lateral line scales (Le) and a number of gill rackers (Rac). Discriminant function analysis indicate characters that had the strongest effect on the geographical variation between A. alburnus samples from Bosnia and Herzegovina. Characters with the strongest discriminant power are: preanal distance, length of pectoral fin, length of the ventral (pelvic) fin, minimum body height, caudal fins branched rays, and pelvic fins branched rays.Values for weight of the gonads and gonadosomatic index (GSI) have not shown any statistically significant difference among observed bleak populations. Regression analysis has been used to estimate the relations between GSI and standard length, body, and gonads weight. The gonadosomatic index has shown positive, non substational, relationship to gonads weight.

In Bosnia and Herzegovina, several illegal waste dumps pose a significant threat to soil and water contamination. The aim of this study was to determine the levels of heavy metal contamination of soils and microbiological contamination of water near investigated landfills. The goal was to identify the harmful effects of illegal landfills on the environment and public health, as well as assessing the potential of contaminants to pollute soil and water resources. Using an Atomic Absorption Spectrometer, the amounts and distribution of four heavy metals (Cd, Co, Pb, and Cr) in soil at four illegal landfills in Central Bosnia were studied. Three water samples collected near the dumpsites studied were tested for microbes. Bacteriological analyses of water included determination of total mesophilic aerobic bacteria, aerobic heterotrophic bacteria, total coliform and fecal coliform bacteria and fecal enterococci. Quantitative results were analyzed using an analysis of variance and Tukey HSD post hoc test. Concentrations of Cd (4.96 mg/kg) and Pb (206.97 mg/kg) recorded in soil at particular sites were above the limits of maximum allowable concentration. Cr and Pb values in soil samples were relatively higher on average than that of Cd and Co. Enrichment factor and pollution load index indicated high concentration of heavy metals in soil, especially Cd. Based on these results, waste from illegal landfills may release considerable amounts of harmful metals and microbes into the environment.

AbstractBuško Blato Reservoir, the third largest hydro accumulation in Europe, is situated in the south-eastern part of the karstic Livanjsko Polje Valley. This aquatic ecosystem is distinguished by a very rich ichthyofauna and the presence of four endemic fish species. Numerous studies focus on ichthyological researches of Buško Blato Reservoir. Its ichthyofauna has been exposed to changes in ecological factors, which in turn reflected on the structure and composition of fish populations. The main objective of this paper was to assess the current state and predict future trends in the ichthyofauna structure and dynamics based on the field data and comprehensive analyses of literature data. The results of the research indicated the presence of 11 fish species from four families, which is the largest number of fish species ever recorded in this ecosystem. Sander lucioperca, Lepomis gibbosus, Pseudorasbora parva and Tinca tinca were recorded for the first time in this ecosystem, while some previously recorded species were not found. The results of the analyses clearly indicate the presence of natural interspecific competition and significant level of threats to the endemic fish species caused by human activities.

UDK: 574.587(282.249 Bosna) The paper presents the distribution and diversity of macrozoobenthos composition of Bosna river up to Zenica, from 1999 to 2010. Macrozoobenthos has been chosen as an element of bioevaluation of the ecological state of running water, and according to the provisions of the Water Framework Directive. Sampling has been done by using the kick-sampling amd multihabitat method, a standard for hydrobiological research. The highest diversity of macrozoobenthos has been found in samples from the sites Rimski most (36 taxa), and the lowest was at site of the Bosna River upstream from the mouth of Ljubina river and downstream of the mouth of the Zgošća river (4 taxa). According to abiotic conditions which directly affect the composition of macrozoobenthos, and using Bray-Curtis similarity, the highest degree of similarity has been found in sites which are spatially nearby. Taxa number and EPT taxa number were highly correlated (R2 = 0,871). Saprobic index and BMWP index were calculated in assessing the ecological status of the river Bosna at the study sites. The values obtained comparing EPT taxa number and BMWP index show a high correlation (R2 = 0,706). The composition and the distribution of the macrozoobenthos in the Bosna river are conditioned by abiotic parameters. Sites upstream of the mouth of the Ljubina river and downstream from the mouth of the Zgošća river represent the places with the highest pollution which is the result of point and diffuse sources of pollution.