The papar deals with the possibility of different types of seas protection from ballast waters, starting with administrative measures up to the technologies proposals by which those waters could be treated. The problem of ballast waters in the Montenegrin part of Adriatic Sea is in focus in this paper, and the proposal for protection measures are elaborated.

In this work results from April to September 2009 are presented, which comprosed analyses of samples from 15 stations along Montenegrin coast. The main aim was to estimated level of eutrophication and phytoplankton community characteristic for eutrophic area. Maximum mean value of microplankton of 8.4 x 10**5 cells/l was noted in the inner part of Bokakotorska Bay. This area has maximal values throughout all period of investigation. It is result of waters dynamics and influence from the coast. In the open sea values were lower, about 10**4 cells/l. These results show that Montenegrin coast is an eutrophic region. Some phytoplankton organisms characteristic for eutrophic region were found also. The most abundant species was Thalassionema nitzschioides with maximum mean value of 8.4 x 10**5 cells/l.

Research of presence and distribution of algal ordo Cystoseira has been done in 8 locations of Montenegrin coast. Presence of 8 species is confirmed and analysis of their aggregation on locations and aggregation of locations based on physico-chemical parameters of sea water and exposition to the waves are studied. Possibility of using these organisms as bioindicators is suggested.

Norway lobster, Nephrops norvegicus is decapod crustacean species that has not been sufficiently researched on the Montenegrin coast. The trawl survey was carried out in the framework of the national research project: The biological resources, edible and inedible, in the trawl fishery on the Montenegrin coast. The spring, summer and autumn aspects were taken into consideration. There is no data regarding the Norway lobster on the Montenegrin coast. The aim of this paper is to give the information about partitipation of this very important commercial species in the trawl fishery on the shelf and continental slope at the Montenegrin coast as well as catch per unit of effort.

Marine sediments are very important for transport, fate and influence of heavy metals in marine ecosystem and therefore they represent good indicator of its ecological status. A great attention has been given in the last two decades in the Mediterranean region to the determination of heavy metals concentration in marine sediments through the monitoring programs, as well as to the studies of heavy metals distribution and their effects on biota. This paper presents the concentrations of Cr, Ni, Cu, Cd, Pb, and Zn determined by EDPXRF method, in the surficial sediment samples taken from six location in the coastal region of the South East Adriatic and their distribution in the investigated area. It can be noticed the influence of the Bojana river regarding the content and distribution of selected heavy metals.

As other areas on Montenegrin coast, Bokakotorska bay is also under a heavy impact of anthropogenic factors and the activities on the shore. The aim of the present work was to determine the levels of lead and cadmium in coastal surface sea water and sediment at three stations located in the inner shore waters Boka Kotor bay, and at one station located off shore Montenegrian coast considered as a reference station. The comparison of the results obtained for the inner shore stations with reference station showed that the content of this metals in some station are considerable increased in ratio to reference station.

Qualitative and quantitative phytoplankton analysis was determined using standard microscopic methods and high performance liquid chromatography (HPLC) in the Bay of Kotor, seasonally, from April 2008 to March 2009. Diatoms represents dominant group of microphytoplankton with maximum in spring period. Dinoflagellates reached maximum value in summer period, and followed by cyanobacteria bloom. Dominant biomarkers, fucoxanthin, alloxanthin, 19'-heksanoloksifukoxanthin, zeaxanthin and chlorophyll b, show a similar distribution as the appropriate phytoplankton assemblages during the researches in Kotor Bay.

Investigation of the echinoderms fauna in the benthic biocoenosis on the Montenegrin shelf is conducted during 2007. Total number of 50 species is identified and they are grouped into 5 classes. Specific conditions of the south Adriatic cause presence of eight termophilic species. Inside collected materials were eight Mediterranean endemics and two submediterramean endemic species. Diversity and quantity of the registered species depend of physical-chemical water conditions, bottom type as well as anthropogenic impact.

The paper gives the results of the analyses of ichthyoplankton assemblages and distribution in Boka Kotorska Bay during July of 2006. Investigation was conducted on 18 positions. Fifteen different species was determine in total. The relation between ichthyoplankton assemblages and abiotic and biotic environmental factors was analysed.