In this paper the size-frequency distribution by sexes and for the whole sample of Norway lobster Nephrops norvegicus (Linnaeus, 1758) as well as the sex raio have been analyzed. Representative subsamples were collected during the four sesonally trawl surveys (summer 2009 – spring 2010) at depths from 330 to 350 m. Total number of analyzed individuals was 303. The carapace length (CL) of the all individuals ranged from 20 to 58mm while the female carapace length-range was 20-56mm and 22-58mm for males. in all seasons males were larger than females and highly represented in the catch in bigger size classes. The overall sex ratio during the investigation period was in favor of females (1.3:1).

The paper presents results of studies of biology and fisheries of red mullet (Mullus barbatus, L.) which was done within the frame of AdriaMed Trawl survey Project 2007/08. The Project encompassed monthly research of several target species in trawl fisheries of Montenegrin waters during one year in three most important fisheries ports in Montenegro (Bar, Budva and Herceg Novi). Total length of red mullet ranged from 9.1 to 21.5 cm with an average value of 15.1 cm. Length frequency distribution, length-weight relationship and sex ratio were analyzed.

Results of phytoplankton investigations that were performed in May, July, August and October 2010 are presented in this paper. The investigated areas are in Boka Kotorska Bay on four locations: Kotor Bay-IBM, Tivat Bay, Hercegnovi Bay-two positions and one position on the open sea – Mamula. In this area the influence of the open sea and the land are expressed to the phytoplankton community. As a consequence of that quantities of phytoplankton are lower in the outer part and higher in the inner part. Diatoms are the most dominant species, which is very frequent in the eutrophic area.

The concentration of trace metals (Pb, Cd, As and Hg) were measured in sea water and sediments in the coastline of the Montenegro. The obtained results of trace metals in sea water were compared with those found in the sediment. Sampling was performed in the fall of 2005 and spring 2006 at five locations in the Montenegrin coastline, Sveti Stasije, Herceg Novi, Budva, Bar and Rt Djeran which present different levels and sources of human impact. The heavy metals analyses in seawater and sediment of the Montenegrin coastline identified to be contaminated with lead the harbor Bar and Sv. Stasije, with arsenic Rt Djeran, with mercury the harbor Bar and Herceg Novi and with cadmium Herceg Novi.

Marine sediments naturally contain arsenic at low concentrations. Increased concentrations could come from natural sources such as volcanic activity, hydrothermal vents and others, but they are usually the result of human activities. The largest number of arsenic compounds possesses toxic properties and due to this arsenic is classified as hazardous substances to the environment and biological species. Therefore, arsenic and its compounds are subject to chemical and biological analysis of sediments. Based on the analysis of sediment samples for arsenic content, this paper presents arsenic spatial distribution in the investigated area of the South-East Adriatic.

Monitoring of phytobenthos was performed seasonally, on five locations of Montenegrin coast for the purpose of environmental monitoring. Locations with highest biodiversity were Budva and Stari Ulcinj, while the poorest one was Kotor. Regression of seagrass Posidonia oceanica was observed on the Krasici location.

A length-weight relationship (LW) for five cephalopod species, of which three decapod (Illex coindetii, Loligo vulgaris, Sepia officianlis) and two octopod species (Eledone cirrhosa, Eledone moschata) is given in this paper. The mean exponent b was found to be significantly lower than 3.

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.

Sea urchin gametes, embryos and larvae can be used for quick, cheap and reliable screening and testing of pharmacologically active substances and pollutants. Effects of fecal pollution of Kotor Bay water and mercury in sediments and water of Risan Bay on embryonic development of spotted sea urchin (S. granularis), were examined. The results showed malformations, blockade of adhesion blastomeras and normal embryonic development. This distortion of development is about the suppression of the normal process of cortical granule exocytosis during activation reaction that starts fertilization, response Ring wave and increased level of free calcium ions in intimately membrane layer.

Paper presents an overview of wastewater treatment systems with macrophytes. It is concluded that application of these systems in Mediterranean countries is feasible, especially for treatment of smaller and remote wastewater point sources.