Reproduction and planktonic phase of life of edible shellfishes, Mytilus galloprovincialis Lamk. and Ostrea edulis L. were the subject of the investigations. Biological and ecological characteristics of mentioned species have been studied in Boka Kotorska Bay (Adriatic Sea), Montenegro (Yugoslavia), having in mind data from the Adriatic Sea and Mediterranean. Beside, some localities from Boka Kotorska Bay, conveniet for their rearing, were described , too. A period of their appearance in plankton was considered before all.

In this work physico-chemical and microbiological indicators of coastal waters of Boka Kotorska Bay were presented. As results these parameters of waters quality for mariculture were estimated, especially for breeding of high quality species: mussels-Mytilus galloprovincialis and oyster-Ostrea edulis. The data of primary production which is important for food chain for these organisms were presented. Investigated locations are suitable for mariculture which was requested from Public Enterprise Coastal zone. Temporary, higher eutrophic level was noticed as result of anthropogenic influence. The data are from one year period (2010- montly and seasonally intervals) by monitoring on 10 locations.

This paper presents results of measuring the contents of certain bio-indicators in samples of digestive gland and lung of mussels (Mytilus galloprovincialis). The results were obtained in the framework of the Program for monitoring ecological status in Montenegro during the 2009 and 2010 year. Biomonitoring program was conducted in accordance with the LBS Protocol (Protocol on the Protection of the Mediterranean Sea against pollution from land-based sources and land activities) and the criteria MED POL Programme (Mediterranean Pollution Control), which is compliant with the requirements of the European Environment Agency (EEA) and has established a system of reporting and data exchange with the EEA. The program includes the analysis of biomarkers in Mytilus galloprovincialis (Lamarc, 1819) (mussels), and dynamic sampling is 2 times a year (March and September). In order to assess the spatial distribution and temporal trends of pollution, followed by the response of various biomarkers presented at two positions in the coastal waters of Montenegro (Dobrota and Bijela) and three positions in Slovenia (bays Piran, Strunjan and Koper). Biomarker responses showed no difference between the positions of the different ecological status.

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.

On the base of monitoring of water quality for aquaculture, performed since 2010, it is noticed that two positions are showing increased level of trophicity and bacteriological contamination. Changes in sanitary quality of farms are especially intensive during the summer months, so the results of basic physical, chamical and biological parameters, measured during periods June-September 2010 and 2011 are presented and compared.

This paper presents results of measuring the contents of certain bioindicators in samples of digestive gland and lung of mussels (Mytilus galloprovincialis). The results were obtained in the framework of the Program for monitoring ecological status in Montenegro from 2009 to 2011 year. Samples were collected from two locations: Kotor-Dobrota (wild mussels) and the site of Bijela (caged mussels). Dynamic of sampling was twice a year, in April and September. In order to estimate the spatial distribution and temporal trends of pollution the results were compared with analysis of biomarkers in the three localities in the Slovenian coastal waters (bays Piran, Koper and Strujan). Biomarker responses showed no differences between these positions in the southern and northern Adriatic.

Mediterranean mussels, Mytilus galloprovincialis, are recognized bioindicators used in investigation of genotoxic pollution in the areas under the impact of anthropogenic activities. In July and August 2011 specimens of M. galloprovincialis were collected from 5 sites of Boka Kotorska Bay, Montenegro. Level of DNA damage was measured in gills, haemolymph and digestive gland with alkaline comet assay. Significant increase in DNA damage was detected in tissues of mussels collected from polluted sites comparing with mussels collected from the clean reference site Dobrota. The highest response to pollution was found in gills and digestive gland cells.