Based on all available data a review of introduced non-indigenous species is reported for the area of Montenegrian coastal sea (South-East Adriatic Sea). All together 11 species were recorded, three algae and eight animals. Monitoring of invasive species has been done partially only for Caulerpa racemose var. cylindracea, while for other species distribution and impact on autochthonous environment is unknown.

The concentrations of heavy metals (Cu, Zn, Cr, Pb, Cd and As) were measured in sea water and mussels at location in the Boka Kotor Bay which selected as result of increased anthropogenic impacts from land. Sampling was performed at three locations, Sv. Stasije, Herceg Novi and Žanjice in the fall 2006 and spring 2007. The majority of the microelements registered in higher concentrations in fall samples in 2006 than in spring samples 2007. The concentration of metals in the studied samples was present at different levels, and is beloved the maximum level allowed, except for yinc and lead in some locations.

Monitoring of ecological condition of the coastal sea of Montenegro has been carried out extensively since 1963 along with foundation of the Institute of marine Biology in Kotor (Montenegro). Recently, in accordance with recommendations of the Barcelona Convention, the LBS Protocol, the EU Framework Directive for coastal waters and domestic laws, in recent years has been carried out continuous monitoring of quality water, sediments, biota as well as ecological effects of pollution on constant monitoring positions in this southeastern part of the Adriatic. In this paper was given an over view of activities and the plan of long-term continuous monitoring of environmental quality and ecological condition of the coastal sea of Montenegro.

Processes in the aquatic environment have been intensively explored in recent years, especially sorption processes. In this study, the sorption behavior of benzothiazole (BT) and 2-methylthiobenzothiazole (MTBT) was investigated, on geosorbents with different contents of organic carbon (OC). For both geosorbents and selected organic compounds, nonlinear isotherms were obtained. BT had the greatest degree of nonlinearity on the geosorbent with a higher content of OC, whereas the greatest degree of nonlinearity for MTBT was obtained on the geosorbent with lower OC content. From a comparison of logKoc for selected concentrations, it can be concluded that the geosorbent with the higher OC content has a higher affinity for the sorption of selected compounds.

Desorption kinetics of chosen organochlorine compounds (pentachlorobenzene, lindane and pentachloroaniline) mediated by solid absorbent, XAD-4 macroporous ion-exchange resin, was studied for two different contact times of organic compounds and sediment (15 and 90 days) in order to determine the potentiality of using this sample and fast method for the assessment of (bio)availability of organic pollutants in sediment-water system.

This paper presents the results of chemical analyzes of water and sediment of the River Tisza, in the section from the Hungarian border to the mouth of the Danube. According to local legislation, water quality in the Tisza is acceptable, i.e. does not exceed the maximum allowable values for Class II watercourses for most parameters at almost all sampling locations. by using the Dutch methodology, it was concluded that the sediments of the Tisza at all profiles is categorized as polluted due to the high mercury and/or nickel contents, except for the profile downstream of Senta, which is partially contaminated. All the sediments are partially polluted in terms of copper content, and the sediment in the profile downstream of the dams is also partially polluted with zinc. The results of this analysis can be used to obtain a preliminary picture of the vulnerability of the Tisza River over its course in Serbia to the large number of industrial pollutants that are present in wastewaters discharged into the river or in the lateral canals that empty into the Tisza.

In the year 2010 ichthyological research on some Vrbas River tributeries located on wider area of Banjaluka city (Bosnia and Herzegovina) was carried out and the occurrence of 14 fish species was recorded. On the basis of the occurrence and abundance of fish species indicators as limnosaprobic parameter, water quality of the analyzed watercourses variated from oligosaprobic to beta mesosaprobic (I and II class of bonity) with saprobic index from 1.27 for Švrakava River to 1.81 for Vrbanja River. The obtained results indicate that water quality of this Vrbas River watershed was on satisfactory level for multiple purposes (in order to sustain ichthyofauna diversity and production and as potential protected areas and spawning zone for some endangered domestic fish species).

In this work, the results of preliminary study of stomach content in brown trout (Salmo trutta L. 1758) of the Gradac in autumn are presented. The fishes were collected by the end of September of 2011 at three sampling sites along the course. A total of 12 fish specimens were examined. By examination of trout stomach content have been found members from macrozoobentho-groups – Trichoptera, Ephemeroptera, Diptera (fam. Ceratopogonidae), Oligochaeta, Coleoptera. At the same time, investigations of bottom fauna composition and structure have been done also. Our study showed that the diet of brown trout is dependent of bottom fauna availability and abundance.

The aim of this study was to assess the water quality of the Gradac, near the town of Valjevo, on an analysis of DNA damage in different tissues of trout (Salmo trutta L. 1758) and barbel (Barbus meridionalis R. 1827). For the detection of genotoxic potential of alkaline comet assay were used three types of tissue, blood liver and gills. Among the parameters available the Olive tail moment was chosen as the most reliable to estimate the damage to DNA molecules. In all tested tissues was detected damage in DNA molecule, where the gills showed the highest sensitivity.

The aim of this work is to present preliminary results of the Sava River investigation at five sites within the reach from Martinska Ves (Croatia) to Šabac (Serbia). A total of 70 macroinvertebrate taxa from 13 groups were recorded, with domination of molluscs and oligochaetes. Among them 7 alien species were registered. Invasive clam Corbicula fluminea was recorded at all five sites, while invasive amphipod Dikerogammarus haemobaphes was not recorded only at locality Šabac. It is expected that the taxa list of aquatic macroinvertebrates within investigated reach will contain more species, after the identification of the rest of biological material and more detail identification of certain taxonomic groups.