[
Balshine, S., Verma, A., Chant, V., Theysmeyer, T. (2005). Competitive interactions between round gobies and logperch. Journal of Great Lakes Research, 31(1), 68-77.10.1016/S0380-1330(05)70238-0
]Search in Google Scholar
[
Bergstrom, M. A., Mensinger, A. F. (2009). Interspecific resource competition between the invasive round goby and three native species: logperch, slimy sculpin, and spoonhead sculpin. Transactions of the American Fisheries Society, 138(5), 1009-1017.10.1577/T08-095.1
]Search in Google Scholar
[
Blackburn, T. M., Essl, F., Evans, T., Hulme, P. E., Jeschke, J. M., Kühn, I., Kumschick, S., Marková, Z., Mrugała, A., Nentwig, W., Pergl, J., Pyšek, P., Rabitsch, W., Ricciardi, A., Richardson, D., Sendek, A., Vilà, M., Wilson, J., Winter, M., Genovesi, P., Bacher, S. (2014). A unified classification of alien species based on the magnitude of their environmental impacts. PLoS biology, 12(5), e1001850.10.1371/journal.pbio.1001850401168024802715
]Search in Google Scholar
[
Brandner, J., Auerswald, K., Cerwenka, A. F., Schliewen, U. K., Geist, J. (2013). Comparative feeding ecology of invasive Ponto-Caspian gobies. Hydrobiologia, 703(1), 113-131.10.1007/s10750-012-1349-9
]Search in Google Scholar
[
Bray, J. R., Curtis, J. T. (1957). An ordination of the upland forest communities of southern Wisconsin. Ecological Monographs, 27(4), 326-349.10.2307/1942268
]Search in Google Scholar
[
Brownscombe, J. W., Fox, M. G. (2012). Range expansion dynamics of the invasive round goby (Neogobius melanostomus) in a river system. Aquatic Ecology, 46(2), 175-189.10.1007/s10452-012-9390-3
]Search in Google Scholar
[
Cerwenka, A. F., Pagnotta, A., Böker, C., Brandner, J., Geist, J., Schliewen, U. K. (2017). Little association of biological trait values with environmental variables in invasive alien round goby (Neogobius melanostomus). Ecology and Evolution, 7(12), 4076-4085.10.1002/ece3.2942547805528649321
]Search in Google Scholar
[
Copp, G. H., Kováč, V., Zweimüller, I., Dias, A., Nascimento, M., BaláŽová, M. (2008). Preliminary study of dietary interactions between invading Ponto-Caspian gobies and some native fish species in the River Danube near Bratislava (Slovakia). Aquatic Invasions, 3(2), 193-200.10.3391/ai.2008.3.2.10
]Search in Google Scholar
[
Crane, D. P., Farrell, J. M., Einhouse, D. W., Lantry, J. R., Markham, J. L. (2015). Trends in body condition of native piscivores following invasion of Lakes Erie and Ontario by the round goby. Freshwater Biology, 60(1), 111-124.10.1111/fwb.12473
]Search in Google Scholar
[
Dashinov, D., Traykov, I., Uzunova, E., Kenderov, L., Apostolou, A. (2018). New data on range expansion of round goby Neogobius melanostomus (Pisces: Gobidae) in the Bulgarian tributaries of Lower Danube River. Proceedings of the Annual of the Sofia University St. Kliment Ohridski, 103(4), 112–117.
]Search in Google Scholar
[
Dashinov, D., Uzunova, E. (2020). Diet and feeding strategies of round goby, Neogobius melanostomus (Pallas, 1814) from the invasion front in the Danube River tributaries (Bulgaria): ontogenetic shift and seasonal variation. Limnologica, 83, 125796.10.1016/j.limno.2020.125796
]Search in Google Scholar
[
Duncan, J. M., Marschner, C. A., González, M. J. (2011). Diet partitioning, habitat preferences and behavioral interactions between juvenile yellow perch and round goby in nearshore areas of Lake Erie. Journal of Great Lakes Research, 37(1), 101-110.10.1016/j.jglr.2010.11.015
]Search in Google Scholar
[
Firth, B. L., Poesch, M. S., Koops, M. A., Drake, D. A. R., Power, M. (2021). Diet overlap of common and at-risk riverine benthic fishes before and after Round Goby (Neogobius melanostomus) invasion. Biological Invasions, 23(1), 221-234.10.1007/s10530-020-02366-7
]Search in Google Scholar
[
French III, J. R., Jude, D. J. (2001). Diets and diet overlap of nonindigenous gobies and small benthic native fishes co-inhabiting the St. Clair River, Michigan. Journal of Great Lakes Research, 27(3), 300-311.10.1016/S0380-1330(01)70645-4
]Search in Google Scholar
[
Herder, F., Freyhof, J. (2006). Resource partitioning in a tropical stream fish assemblage. Journal of Fish Biology, 69(2), 571-589.10.1111/j.1095-8649.2006.01126.x
]Search in Google Scholar
[
Hirsch, P. E., N’Guyen, A., Adrian-Kalchhauser, I., Burkhardt-Holm, P. (2016). What do we really know about the impacts of one of the 100 worst invaders in Europe? A reality check. Ambio, 45(3), 267-279.10.1007/s13280-015-0718-9
]Search in Google Scholar
[
Hristova, H. (2012). River waters of Bulgaria. Tip-top press, Sofia, Bulgaria, 830 p. (in Bulgarian).
]Search in Google Scholar
[
Janssen, J., Jude, D. J. (2001). Recruitment failure of mottled sculpin Cottus bairdi in Calumet Harbor, southern Lake Michigan, induced by the newly introduced round goby Neogobius melanostomus. Journal of Great Lakes Research, 27(3), 319-328.10.1016/S0380-1330(01)70647-8
]Search in Google Scholar
[
Jurajda, P., Černý, J., Polačik, M., Valová, Z., Janáč, M., BlaŽek, R., Ondračková, M. (2005). The recent distribution and abundance of non native Neogobius fishes in the Slovak section of the River Danube. Journal of Applied Ichthyology, 21(4), 319-323.10.1111/j.1439-0426.2005.00688.x
]Search in Google Scholar
[
Jůza, T., Blabolil, P., Baran, R., Bartoň, D., Čech, M., Draštík, V., Frouzová, J., Holubová, M., Ketelaars, H., Kočvara, L., Kubečka, J., Muška, M., Prchalová, M., Říha, M., Sajdlová, Z., Šmejkal, M., Tušer, M., Vašek, M., Vejřík, L., Vejříková, I., Wagenvoort, A., Žák, J., Peterka, J. (2018). Collapse of the native ruffe (Gymnocephalus cernua) population in the Biesbosch lakes (the Netherlands) owing to round goby (Neogobius melanostomus) invasion. Biological Invasions, 20(6), 1523-1535.10.1007/s10530-017-1644-5
]Search in Google Scholar
[
Karlson, A. M., Almqvist, G., Skóra, K. E., Appelberg, M. (2007). Indications of competition between non-indigenous round goby and native flounder in the Baltic Sea. ICES Journal of Marine Science, 64(3), 479-486.10.1093/icesjms/fsl049
]Search in Google Scholar
[
Kornis, M. S., Mercado-Silva, N., Vander Zanden, M. J. (2012). Twenty years of invasion: a review of round goby Neogobius melanostomus biology, spread and ecological implications. Journal of Fish Biology, 80(2), 235-285.10.1111/j.1095-8649.2011.03157.x22268429
]Search in Google Scholar
[
Kornis, M. S., Weidel, B. C., Vander Zanden, M. J. (2017). Divergent life histories of invasive round gobies (Neogobius melanostomus) in Lake Michigan and its tributaries. Ecology of Freshwater Fish, 26(4), 563-574.10.1111/eff.12300
]Search in Google Scholar
[
Kottelat, M., Freyhof, J. (2007). Handbook of European Freshwater Fishes. Kottelat, Cornol, Switzerland and Freyhof, Berlin, Germany.
]Search in Google Scholar
[
Krakowiak, P. J., Pennuto, C. M. (2008). Fish and macroinvertebrate communities in tributary streams of eastern Lake Erie with and without round gobies (Neogobius melanostomus, Pallas 1814). Journal of Great Lakes Research, 34(4), 675-689.10.1016/S0380-1330(08)71610-1
]Search in Google Scholar
[
Mikl, L., Adámek, Z., Všetičková, L., Janáč, M., Roche, K., Šlapanský, L., Jurajda, P. (2017). Response of benthic macroinvertebrate assemblages to round (Neogobius melanostomus, Pallas 1814) and tubenose (Proterorhinus semilunaris, Heckel 1837) goby predation pressure. Hydrobiologia, 785(1), 219-232.10.1007/s10750-016-2927-z
]Search in Google Scholar
[
Moller Pillot, H. (2009). A key to the larvae of the aquatic Chironomidae of the north-west European lowland. Second edition, published by the author, 77 p.
]Search in Google Scholar
[
Nagelkerke, L. A., van Onselen, E., van Kessel, N., Leuven, R. S. (2018). Functional feeding traits as predictors of invasive success of alien freshwater fish species using a food-fish model. PLoS One, 13(6), e0197636.10.1371/journal.pone.0197636599137629874244
]Search in Google Scholar
[
Nurkse, K., Kotta, J., Orav-Kotta, H., Ojaveer, H. (2016). A successful non-native predator, round goby, in the Baltic Sea: generalist feeding strategy, diverse diet and high prey consumption. Hydrobiologia, 777(1), 271-281.10.1007/s10750-016-2795-6
]Search in Google Scholar
[
Oesterwind, D., Bock, C., Förster, A., Gabel, M., Henseler, C., Kotterba, P., Menge, M., Myts, D., Winkler, H. M. (2017). Predator and prey: the role of the round goby Neogobius melanostomus in the western Baltic. Marine Biology Research, 13(2), 188-197.10.1080/17451000.2016.1241412
]Search in Google Scholar
[
Okgerman, H., Elp, M., Yardimci, C. H. (2011). Growth, the length-weight relationship, and reproduction in vimba (Vimba vimba L. 1758) sampled from an oligo-mesotrophic lake in northwest Anatolia (Turkey). Turkish Journal of Zoology, 35(1), 87-96.10.3906/zoo-0901-16
]Search in Google Scholar
[
Pehlivanov, L., Uzunova, E., Pavlova, M. (2009). Ichthyofauna of the Vit River (Danube basin): composition, distribution and conservation significance. Biotechnology & Biotechnological Equipment, 23(sup1), 337-340.10.1080/13102818.2009.10818433
]Search in Google Scholar
[
Piria, M., Jakšić, G., Jakovlić, I., Treer, T. (2016). Dietary habits of invasive Ponto-Caspian gobies in the Croatian part of the Danube River basin and their potential impact on benthic fish communities. Science of the Total Environment, 540, 386-395.10.1016/j.scitotenv.2015.05.12526054972
]Search in Google Scholar
[
Rakauskas, V., Pūtys, Ž., Dainys, J., Lesutienė, J., Ložys, L., Arbačiauskas, K. (2013). Increasing population of the invader round goby, Neogobius melanostomus (Actinopterygii: Perciformes: Gobiidae), and its trophic role in the Curonian Lagoon, SE Baltic Sea. Acta Ichthyologica et Piscatoria, 43(2), 95-108.10.3750/AIP2013.43.2.02
]Search in Google Scholar
[
Ricciardi, A., Cohen, J. (2007). The invasiveness of an introduced species does not predict its impact. Biological Invasions, 9(3), 309-315.10.1007/s10530-006-9034-4
]Search in Google Scholar
[
Ricciardi, A., Kipp, R. (2008). Predicting the number of ecologically harmful exotic species in an aquatic system. Diversity and Distributions, 14(2), 374-380.10.1111/j.1472-4642.2007.00451.x
]Search in Google Scholar
[
Schoener, T. W. (1970). Nonsynchronous spatial overlap of lizards in patchy habitats. Ecology, 51(3), 408-418.10.2307/1935376
]Search in Google Scholar
[
Schrandt, M. N., Stone, L. C., Klimek, B., Makelin, S., Heck, K. L., Mattila, J., Herlevi, H. (2016). A laboratory study of potential effects of the invasive round goby on nearshore fauna of the Baltic Sea. Aquatic Invasions, 11(3), 327-335.10.3391/ai.2016.11.3.10
]Search in Google Scholar
[
Skabeikis, A., Morkūnė, R., Bacevičius, E., Lesutienė, J., Morkūnas, J., Poškienė, A., Šiaulys, A. (2019). Effect of round goby (Neogobius melanostomus) invasion on blue mussel (Mytilus edulis trossulus) population and winter diet of the long-tailed duck (Clangula hyemalis). Biological Invasions, 21(3), 911-923.10.1007/s10530-018-1869-y
]Search in Google Scholar
[
Stefanov, T., Trichkova, T. (2012b). Cottus gobio. In: the Red book of Bulgaria, volume 2 Animals (Ed.) V. Golemanski, Bulgarian Academy of Science electronic edition http://e-ecodb.bas.bg/rdb/bg/vol2/Roalbipi.html .
]Search in Google Scholar
[
Trichkova, T., Stefanov, T., Vassilev, M., Zivkov, M. (2009). Fish species diversity in the rivers of the north-west Bulgaria. Transylvanian Review of Systematical and Ecological Research, (8), 161-168.
]Search in Google Scholar
[
Ustups, D., Bergström, U., Florin, A. B., Kruze, E., Zilniece, D., Elferts, D., Konspina, E., Uzars, D. (2016). Diet overlap between juvenile flatfish and the invasive round goby in the central Baltic Sea. Journal of Sea Research, 107, 121-129.10.1016/j.seares.2015.06.021
]Search in Google Scholar
[
Uzunov, Y., Yaneva, I., Parvanov, D., Varadinova, E., Kenderov, L., Tyufekchieva, V., Panova-Karajova, A., Sofi, R., Petrova, A. (2010). Short manual for bottom invertebrate fauna (macrozoobenthos) of the Bulgarian rivers and lakes. Ministry of Environment and Water ¹ 6/27.03.2009 operational program environment, Sofia, Bulgaria, 134 p. (in Bulgarian)
]Search in Google Scholar
[
Uzunova, E. P., Kanev, E. K., Stefanov, T. (2017). Spatial variation in the abundance and population structure of bullhead Cottus gobio L., 1758 (Actinopterygii: Cottidae) from the Iskar River Basin (Danube River drainage, Bulgaria): Implications for monitoring and conservation. Acta Zoological Bulgarica, 69(3), 393-404.
]Search in Google Scholar
[
Kessel, N. V., Dorenbosch, M., Kranenbarg, J., van der Velde, G., Leuven, R. S. E. W. (2016). Invasive Ponto-Caspian gobies rapidly reduce the abundance of protected native bullhead. Aquatic Invasions, 11(2), 179-188.10.3391/ai.2016.11.2.07
]Search in Google Scholar
[
Vassilev, M., Apostolou, A., Velkov, B., Dobrev, D., Zarev, V. (2012). Atlas of the gobies (Gobiidae) in Bulgaria. Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, Sofia.
]Search in Google Scholar
[
Wallace Jr, R. K. (1981). An assessment of diet-overlap indexes. Transactions of the American Fisheries Society, 110(1), 72-76.10.1577/1548-8659(1981)110<72:AAODI>2.0.CO;2
]Search in Google Scholar
[
Zarev, V. Y., Apostolou, A. I., Velkov, B. K., Vassilev, M. V. (2013). Review of the Distribution of the Family Gobiidae (Pisces) in the Bulgarian Danube Tributaries. Ecologia Balkanica, 5(2), 81-89.
]Search in Google Scholar
[
Zenni, R. D., Nuńez, M. A. (2013). The elephant in the room: the role of failed invasions in understanding invasion biology. Oikos, 122(6), 801-815.10.1111/j.1600-0706.2012.00254.x
]Search in Google Scholar
e 