E. Petrova*, S. Stoykov Institute of Fish Resources, 9000 Varna, Bulgaria (Manuscript received 30 August 2017; accepted for publication 6 November 2017) Abstract. The aim of this paper is to establish the biodiversity status of the macrozoobenthos in some protected marine areas (NATUR

D. Klisarova, D. Gerdzhikov Institute of Fish Resources, 9000 Varna, Bulgaria (Manuscript received 13 August 2017; accepted for publication 3 October 2017) Abstract. In this article have been investigated the taxonomic structure of the phytoplankton communities developing in the Black

D. Klisarova*, E. Petrova, D. Gerdzhikov, S. Stoykov Institute of Fish Resources, 4 Primorski, 9000 Varna, Bulgaria (Manuscript received 23 March 2016; accepted for publication 30 May 2016) Abstract. Burgas Bay is the largest one on the Bulgarian Black Sea coast. Industrial plants alo

S. Georgieva*, M. Stancheva Department of Chemistry, Medical University, Marin Drinov 55, 9002 Varna, Bulgaria (Manuscript received 25 April 2016; accepted for publication 30 May 2016) Abstract. Polychlorinated biphenyls (PCBs) are characterized by high lipophilicity and persistence i

D. Klisarova*, D. Gerdzhikov, E. Petrova Institute of Fish Resources, 4 Primorski, 9000 Varna, Bulgaria (Manuscript received 23 March 2016; accepted for publication 26 May 2016) Abstract. The paper discusses the indices for assessment of the ecological status of seawater which are app

D. Petrova*, D. Gerdzhikov Institute of Fish Resources, 4 Primorski, 9000 Varna, Bulgaria Abstract. The aim of this paper was to study and assess the quality of Bulgarian Black Sea coastal water using the biological quality element phytoplankton communities, according to the requireme

E. Petrova-Pavlova* Institute of Fishing Resources Varna, 4 Primorski, 9000 Varna, Bulgaria Abstract. Overfishing in the World Ocean including the Black Sea, as well as the global pollution led to a reduction in the quantity of industrial fish species. The occurring changes have led t

D. Petrova, G. Kostadinova, D. Gerdzhikov Abstract. The purpose of this article was to study and make an ecological assessment of the phytoplankton community in the Bulgarian Black Sea coastal waters for the period 2008 – 2010. Taxonomic distribution in the phytoplankton community is

D. Petrova, D. Gerdzhikov, G. Kostadinova Abstract. The genus Chaetoceros Ehrenberg of class Bacillariophyceae is widespread and abundant in species in the Black Sea phytoplankton. The aim of the article was to study its distribution in water and to analyzed its contemporary involveme

E. Petrova, S. Stoykov Abstract. The interest in studies of the nearby coastal zone of the Black Sea is great because it is the most productive section of the basin. The variety of habitats, water aeration, good temperature and density of nutrients coming from the nearest land and lit