D. Klisarova1,2, D. Gerdzhikov1* 1Institute of Fish Resources, Agricultural Academy, Varna, 9000, POBox 72, Primorski 4 2Medical University – Pleven, 5800, Saint Kliment Ohridski Street, 1 (Manuscript received 18 July 2022; accepted for publication 15 August 2022) Abstract. Mari

D. Klisarova*, D. Gerdzhikov Institute of Fish Resources, 4 Primorski Blvd., 9000 Varna, Bulgaria (Manuscript received 7 November 2019; accepted for publication 21 January 2020) Abstract. The aim of the study was to identify the peculiarities of the development of phytoplankton blooms

R. Nastova*, V. Kostov, N. Gjorgovska, V. Levkov Institute of Animal Science, “Ss Cyril and Methodius” University of Skopje, Bul. Ilinden 92a, 1000 Skopje, Republic of Macedonia (Manuscript received 21 June 2017; accepted for publication 16 January 2018) Abstract. The aim

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

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

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

D. Petrova, E. Petrova, D. Gerdzhikov, V. Vachkova, R. Bekova Abstract. The paper assessed the ecological status of Varna Bay during the autumn of 2011, according to the assessment of biotic components phytoplankton, macrozoobenthos and macrophytes in accordance with the requirements