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Apostolos Apostolou

Apostolos Apostolou's picture

Personal information


Institute of Biodiversity and Ecosystem Research
Bulgarian Academy of Sciences
1, Tsar Osvoboditel Blvd.
1000 Sofia


Curriculum vitae

Born in 1972
Education: Sofia University, Faculty of Biology, 1996, Master of Science in Ichthyology and Aquaculture
Qualification: Sofia University, Faculty of Biology, 2002, PhD in Hydrobiology
Previous experience: Institute of Zoology Bulgarian Academy of Sciences 17.11.2003 - 11.02.2005, biologist
Institute of Zoology Bulgarian Academy of Sciences 11.02.2005 -16.07.2008, Research Fellow II degree
Institute of Zoology Bulgarian Academy of Sciences 16.07.2008 - 07. 2010 Research Fellow I degree
07.2010-07.2014 Institute for Biodiversity and Ecosystem Research Bulgarian Academy of Sciences Assistant Professor
07.2014-up to now: Institute for Biodiversity and Ecosystem Research Bulgarian Academy of Sciences, Associate Professor
1. Greek Geotechnical Chamber – clone Ichthyology
2. Bulgarian Ichthyological Society
3. Natural Science association “Ivan Buresh”, Bulgaria
4. IAD
Participation in more than 40 projects, 32 conferences.
Reviews: 13
Citations: 150

Research interests

Fish morphology, ecology and systematics, ichthyogeography, population biochemical-genetics, GIS application on ichthyology, underwater in situ research management of aquatic ecosystems, freshwater and marine fishes, aquatic ecosystem management and assessment


1. Apostolou A., I. Dobrovolov 1999. About the taxonomic status of the chub (Pisces, genus Leuciscus) from the rivers of the Aegean basin. Proceedings of the Institute of fisheries-Varna, 25: 47-55.
2. Dobrovolov I., Zh. Georgiev, A. Apostolou, P. Ivanova (1999). New data on the taxonomy of species in the genus Atherina (Pisces, Atherinidae) from Aegean sea. Proceedings of the Institute of fisheries-Varna, 25:15-26 (in Bulgarian, English summary).
3. Апостолу, А. 2002. Ихтиофауната (морфологични, електрофоретични, фаунистични и морфологични изследвания) от средното и долното течение на р. Места и р. Струма на територията на България и Гърция. Автореферат на дисертация, СУ, Биологически факултет, София.
4.Dobrovolov I., P. Ivanova, A. Apostolou, Zh. Manolov (2003). Systematics of the Atherinidae species in the Black sea and the Mediterranean basins based on biochemical-genetic data. Proceedings of the Sixth International Conference on the Mediterranean Coastal Environment, MEDCOAST, 03, E. Ozhan (Ed.) 7-11 Oct. 2003, Ravenna, Italy, 721-729.
5. Apostolou, A. 2005. The ichthyofauna from the Bulgarian Sector of the Mesta River. Acta Zoologica Bulgarica, 57 (2), 2005: 191-196.
6. Apostolou, A, Ivanova, P., Dobrovolov, I., Trichkova, T., Zivkov, M. 2007. Genetic-biochemical characteristic of Carassius gibelio (BLOCH, 1798) populations in some Bulgarian and Greek water basins. Proceedings of the Institute of Fisheries Research Institute-Varna 26: 45-50.
7. Apostolou A., T. Stefanov, M. Vassilev, A.Sediva, L. Pehlivanov 2008. Distribution of the stone loaches (Pisces: Balitoridae) in Bulgaria – past and present status. Acta Zoologica Bulgarica, Suppl. 2: 29-33.
8. Šedivá, A. - Apostolou, A. - Kohout, J. - Kostov, V. - Šanda, R 2008. Genetic structure and distribution of Oxynoemacheilus bureschi (Balitoridae, Teleostei), and its phylogenetic relationships with other European stone loaches. Folia Zoologica 57 (1-2), 111-119. IF
9. Choleva, L., Apostolou, A. Rab P. & Janko, K 2008. Making it on their own: sperm-dependent hybrid fishes (Cobitis) switch the sexual hosts and expand beyond the ranges of their original sperm-donors. Philosophical Transactions of the Royal Society B: Biological Sciences, 363, 2911-2919. IF
10. Trichkova, A., M. Zivkov & A. Apostolou, 2008. Some biological characteristics of gibel carp (Carassius gibelio) from three localities in the Bulgarian stretch of the Danube River. In: Genov, I. (Ed.),The 17th International Symposium “Ecology & Safety 2008”, 9-13 June, Sunny Beach, Bulgaria, Scientific Articles. (In Bulgarian, English summary)
11. М. Василев, Б. Велков, А. Апостолу 2009. Новости и открития: Черноморските попчета от българското крайбрежие. Бюлетин на национална океанографска комисия, бр. 6, ноември 2009, 19-23.
- Vassilev M., Velkov B., Apostolou A 2009. News and discoveries: the Black Sea gobies from the Bulgarian sector. Bulletin of the Bulgarian Oceanographic Commission, 6: November 2009, 19-23.
12. Šedivá A., Apostolou A., Kohout J., Bohlen J. 2010. Molecular phylogenetic analyses of the loach Oxynoemacheilus bureschi reveal postglacial range extensions across major river systems of the Balkans. Journal of Fish Biology 76: 357-368. IF
13. Apostolou A., M. Koutrakis, L. Pehlivanov, M. Vassilev, T. Stefanov, B. Velkov (2010). Notes on the Fish Fauna Composition of Mesta (Nestos) River in Regard to Management and Conservation. Acta Zoologica Bulgarica 62 (3), 2010: 271-276. IF
14. Stransky, C., Adamidou, A., Apostolou, A., Armesto, A., Bengtsberg, R., Berkenhagen, J., Cardinale, M., Carpentieri, P., Davidjuka, I., Degel, H., Dias, M., DiNatale, A., Dintheer, C., Ebeling, M., Goti, L., Gravino, F., Gustavsson, T., Longoni, E., Myllylä, T., Nermer, T., Ní Chonchúir, G., Pinello, D., Raid, T., Sics, I., Ulleweit, J., Vassallo, D., Virtanen, J., Wieland, K., Zarauz, L. (2010). Evaluation of 2009 Annual Reports related to the Data Collection Framework. Report of the Subgroup on Research Needs (SGRN 10-02). Luxembourg: Publications Office of the European Union pp. 274. EUR – Scientific and Technical Research series – ISSN 1018-5593, ISBN 978-92-79-16789-8, doi:10.2788/18683
15. Anu Albert, Apostolos Apostolou, Rickard Bengtsberg, Matthew Camilleri, Paolo
Carpentieri, Paul Connolly (Chairman), Marina Dias, Christian Dintheer, Roberto Emma, Leyre Goti, Francesca Gravino, Brian Harley, Aaron Hatcher, Eskild Kirkegaard (STECF), Philip Kunzlik, Ari Leskelä, Maria Cristina Morgado, Pilar Pereda, Gheorghe Radu, David Reid, Katja Ringdahl, Evelina Carmen Sabatella, Romas Statkus, Christoph Stransky (STECF), Els Torreele, Frans van Beek, Hans van Oostenbrugge (STECF), Joel Vigneau, Jarno Virtanen (2011). Scientific, Technical and Economic Committee for Fisheries. Reflections on the Present and Future Requirements of the DCF(STECF-11-04). Luxembourg: Publications Office of the European Union pp.158. EUR – Scientific and Technical Research series – ISSN 1831-9424 (online), ISSN 1018-5593 (print), ISBN 978-92-79-20802-7, doi:10.2788/38965
16. Pehlivanov L., Stefanov T., Mihov S., Biserkov V., Vassilev M., Apostolou A., Velkov B. 2011. Recent ichthyofauna in the wetlands along the Bulgarian section of the Danube. Sc. Annals of DDI Tulcea, Romania vol. 17: 83-88.
17. Vassilev M., Apostolou A., Velkov B., Ivanova P., Panayotova M., Dobrev D., Pehlivanov, L. 2011. Status of gobiid ichthyofauna in Bulgaria: taxonomical, conservative and social aspects. Natura Montenegrina, Podgorica, 10 (2): 115-124.
18. Apostolou A., Ivanova P., Velkov B., Vassilev M., Dobrev D., Dobrovolov I. (2011). Pomatoschistus marmoratus (RISSO 1810), is it really a “New” species for Bulgarian Ichthyofauna? Acta Zoologica Bulgarica 63 (3): 289-294. IF
19. Zogaris S., A. Apostolou (2011). First record of Pontian Monkey Goby, Neogobius fluviatilis (Pallas, 1814) in the Evros River (Greece); Is it an alien species? Medit. Mar. Sci., 12/2: 454-461. IF
20. Zarev, V., A. Apostolou, B. Velkov, M. Vassilev, 2013. Bulgarian Black Sea gobies as important object in the commercial fishing. Bulgarian Journal of Agricultural Science, Supplement 2, 19:233-236.
21. Simonović, A. Tošić, M. Vassilev, A. Apostolou, D. Mrdak, M. Ristovska, V. Kostov, V. Nikolić, D. Škraba, L. Vilizzi And G.H. Copp, 2013. Risk assessment of non-native fishes in the Balkans Region using FISK, the invasiveness screening tool for non-native freshwater fishes. Medit. Mar. Sci., 14/2, 2013, 369-376. IF
22. Jan Kohout, Alena Šedivá, Apostolos Apostolou, Tihomir Stefanov, Saša Maric´, Muhammet Gaffarog˘lu & Vlastimil Šlechta 2013. Genetic diversity and phylogenetic origin of brown trout Salmo trutta populations in eastern Balkans. Biologia 68/6: 1229—1237,Section Zoology. DOI: 10.2478/s11756-013-0271-6. IF
23. Pehlivanov L., M. Pavlova, M. Vassilev, A. Apostolou, B. Velkov 2012. Ecological Quality Assessment of Salmonid Rivers in Bulgaria Using Ichthyologic Parameters. Acta zool. bulg., Suppl. 4, 2012: 197-203 IF
24. Ivanova P., I. Dobrovolov, A. Apostolou, M. Vasilev, B. Velkov, D. Dobrev 2013. Protein Biomarkers for Identification of Some Gobiid Species (Actinopterygii: Gobiidae) along the Bulgarian Black Sea Coast. Acta zoologica bulgarica 65 (4): 429-438. IF
25. Koutrakis E., A. Sapounidis, A. Apostolou, M. Vassilev†, L. Pehlivanov, P. Leontarakis, A. Tsekov, G. Sylaios, P. Economidis 2013. An integrated ichthyofaunal survey in a heavily-modified, cross-border watershed. Journal of Biological Research-Thessaloniki 20: 326– 338. IF
26. Luchezar Pehlivanov, Apostolos Apostolou, Emilia Varadinova, Milena Pavlova, Milen Vassilev, Boris Velkov, Maria Kerakova 2013. Recent fish fauna of the Mesta River basin: composition, distribution and ecological quality assessment. In: Uzunov Y., L. Pehlivanov, B. B. Georgiev, E. Varadinova (Editors) 2013. Mesta River: Biological Quality Elements and Ecological Status. Sofia, Professor Marin Drinov Publishing House, vi+136 pp.
27. Apostolos Apostolou, Vassilev Milen, Boris Velkov 2013. The European Eel Anguilla anguilla (Pisces, Anguillidae). Native or Alien in the Black Sea? Ecologia Balcanica, Vol 5, Issue 2, 57-62.
28. Zarev V., A. Apostolou, B. Velkov, Milen Vassilev 2013. Review of the distribution of the Family Gobiidae in the Bulgarian Danube tributaries. Ecologia Balcanica, Vol 5, Issue 2 81-89.
29. Apostolou Apostolos, 2014. First occurrence of Serranus hepatus in the Bulgarian Black Sea coast. J. Black Sea/Mediterranean Environment Vol. 20, No. 2: 142-146.
30. Velkov B., Vassilev M., Apostolou A. 2014. Growth, age and size structure of the round goby (Neogobius melanostomus) from its main habitats in Bulgarian waters. Proceedings of HydroMedit 2014, November 13-15, Volos, Greece, 466-471.
31. Petriki O., T. Naziridis, A. Apostolou, E.l Koutrakis, D. Bobori 2014. The spread of the introduced species Gymnocephalus cernua (Perciformes: Percidae) in the transboundary Strymonas Basin: first report in Kerkini Dam Lake. Bulgarica Acta zool. bulg., 66 (4), 2014: 563-566. IF
32. Apostolou A., Stefanov T., Tsekov A., Velkov B., Koev V., Margaritova B., Mihov S. 2016. Can artificially breed sturgeons survive in lower Danube? Annuaire de l’Université de Sofia “St. Kliment Ohridski”, Faculte de Biologie, Sofia University Press, 79-84.
33. Apostolou A., M. Ristovska, S. Shumka, L. Pehlivanov 2016. The implementation of WFD in the South-Eastern Balkans-development, problems and perspectives. Proceedings of the 16th Hellenic Conference of ichthyologists, 6-9 October, Kavala, Greece, 225-228. (In Greek). ISBN 978-960-98007-3-0.
34. Apostolou, A., Ivanova, P., Velkov, B., Vasilev, M. 2016. Ecological plasticity of Apollonia melanostomus (Pisces, Gobiidae) from its main habitat types in Bulgaria. Ecologia Balkanica 8 (2): 43-52.
35. Pehlivanov, L., A. Apostolou, G.. Wolfram 2017. Development of Bulgarian Fish Based Index for ecological classification and monitoring of natural riparian lakes (Type L5/L-EC-1). Acta zool. bulg., Research Article Suppl. 8: 153-162. IF
36. Пехливанов Л., А. Апостолу, Ст. Казаков, Е. Варадинова, Й. Узунов, Я. Пресолска, В. Василев 2017. Използване на наличните данни за оценка на състоянието на сладководни екосистеми в България – подходи, предизвикателства, решения. В: Екосистемните услуги в България: първи малки стъпки към големия скок за съхраняване на човечеството, научна редакция и съставителство: Йордан Узунов, Спартак Керемидчиев, Георги Шопов 2017: 185-192.
37. Пехливанов Л., А. Апостолу, Б. Велков, Ст. Казаков, 2017. Подходи за прилагане на информацията, свързана с индикатори 11204 " Брой рибни таксони" и 11205 "Брой консервационно значими видове риби" за оценка на биофизичното състояние на сладководни екосистеми от тип С "вътрешни повърхностни води-реки и езера". В: Екосистемните услуги в България: първи малки стъпки към големия скок за съхраняване на човечеството, научна редакция и съставителство: Йордан Узунов, Спартак Керемидчиев, Георги Шопов 2017: 225-233.
38. Piria M., P. Simonović, E. Kalogianni, L. Vardakas, N. Koutsikos, D. Zanella, M. Ristovska, A. Apostolou, A. Adrović, D. Mrdak, A. Serhan Tarkan, D. Milošević, L. N. Zanella, R. Bakiu, F. Güler Ekmekçi, M. Povž, K. Korro, V. Nikolić, R. Škrijelj, V. Kostov, A. Gregori, M. K. Joy 2018. Alien freshwater fish species in the Balkans – vectors and pathways of introduction. Fish and fisheries 19:138–169.IF
39. D. Dashinov, I. Traykov, E. Uzunova, L.Kenderov, A. Apostolou 2018. New data on range expansion of round goby Neogobius melanostomus (Pisces: Gobidae) in the Bulgarian tributaries of Lower Danube River. Annuaire de l’Université de Sofia “St. Kliment Ohridski”, Faculte de Biologie 103 (4):112-117.
40. Pehlivanov, L., A. Apostolou, B. Velkov 2018. Effects of small hydropower plants on the river fish communities. Case studies. Acta zool. Bulg. Suplement 12: 93-100. IF
41. Shumka S., A. Apostolou 2018. Current knowledge on the status of most common non-indigenous fish species in Tranasboundary Greater Prespa Lake (Albanian side). Acta zool. bulg., 70 (2): 203-209. IF
42. Apostolou A. Pehlivanov L. 2018. Pilot underwater visual census study in a Bulgarian Sub-Mediterranean reservoir. Thalassia Salentina 40 (2): 21-26.
43. Apostolou A., L. Pehlivanov, M. Shabuss, H. Zorning 2019. The distribution of Eudontomyzon mariae in protected areas of the Lower Danube River: a review. Acta zool. Bulg., 71 (1): 149-151. IF.
44. Chamoglou M., Apostolou A. (2019). Fish community in Karla Reservoir (Central Greece) after the filling stage of the reservoir development. Acta zool. bulg., 71 (4), 2019: 575-580. IF.
45. Angelov M., Z. M. Zhelev, G. Popgeorgiev, Apostolou A. 2020. Preliminary data on the dynamics of 24-hour upstream fish migration in the lower course of Tundzha River (Southern Bulgaria) based on a fish pass monitoring. Acta Zool. Bulg., 72 (2): 289-296. IF.
46. Marin I. Marinov, Doychin T. Todorov, Luchezar Z. Pehlivanov, Apostolos I. Apostolou 2021. Integrated Assessment of the Status of Fish Fauna Reproduction Areas (Integrated IcRH Index). 2021, Special edition 4, 65-78.
47. Apostolou A., L. Pehlivanov L., Schabuss M. & H. Zorning H. – Monitoring fish in Lower Danube River main channel by applying various sampling methodologies Acta Zoologica Bulgarica, 73(2): 269-274. IF.
48. Green, Leon, Apostolos Apostolou, Ellika Faust, Kajsa Palmqvist, Jane W. Behrens, Jonathan N. Havenhand, Erica H. Leder, and Charlotta Kvarnemo. 2021. "Ancestral Sperm Ecotypes Reveal Multiple Invasions of a Non-Native Fish in Northern Europe" Cells 10, no. 7: 1743. IF.
49. Apostolou A., Velkov B., Green, L. 2021. The first record of the invasive round goby Neogobius melanostomus in the Aegean Basin, Bulgaria. Journal of Applied Ichthyology. 2021;00:1–4. IF.


Aquatic Ecosystems
Ecological Classification and Bioresources of Freshwater Ecosystems
Research group
Fish Biodiversity and Resources


Member for
8 years 24 weeks