{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,4]],"date-time":"2026-04-04T16:33:24Z","timestamp":1775320404448,"version":"3.50.1"},"publisher-location":"Dordrecht","reference-count":160,"publisher":"Springer Netherlands","isbn-type":[{"value":"9781402044175","type":"print"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"DOI":"10.1007\/978-1-4020-5781-6_5","type":"book-chapter","created":{"date-parts":[[2007,9,4]],"date-time":"2007-09-04T16:14:30Z","timestamp":1188922470000},"page":"109-140","source":"Crossref","is-referenced-by-count":11,"title":["Fauna and Distribution of Fishes in Bulgaria"],"prefix":"10.1007","author":[{"given":"Tihomir","family":"Stefanov","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","reference":[{"key":"5_CR1","first-page":"111","volume":"6","author":"K. Alexandrova","year":"1965","unstructured":"Alexandrova, K., 1965. [The ichthyoplankton of Varna Lake during the summer months of 1956\u20131964]. Izvestiya na Nauchnoizsledovatelskiya institut za ribno stopanstvo i okeanografiya \u2013 Varna (Proceedings of the Research Institute of Fisheries and Oceanography \u2013 Varna) 6:111\u2013119 (in Bulgarian).","journal-title":"Izvestiya na Nauchnoizsledovatelskiya institut za ribno stopanstvo i okeanografiya \u2013 Varna (Proceedings of the Research Institute of Fisheries and Oceanography \u2013 Varna)"},{"key":"5_CR2","first-page":"263","volume":"8","author":"K. Alexandrova","year":"1967","unstructured":"Alexandrova, K.,1967. [Mullets in the lakes along the Bulgarian Black Sea coast]. Izvestiya na Nauchnoizsledovatelskiya institut za ribno stopanstvo i okeanografiya \u2013 Varna (Proceedings of the Research Institute of Fisheries and Oceanography \u2013 Varna) 8:263\u2013293 (in Bulgarian).","journal-title":"Izvestiya na Nauchnoizsledovatelskiya institut za ribno stopanstvo i okeanografiya \u2013 Varna (Proceedings of the Research Institute of Fisheries and Oceanography \u2013 Varna)"},{"issue":"3","key":"5_CR3","first-page":"8","volume":"19","author":"A. Apostolov","year":"1972","unstructured":"Apostolov, A.,1972. [The ichthyofauna of the Karaach River]. Ribno stopanstvo [Fisheries] 19(3):8\u20139 (in Bulgarian).","journal-title":"Ribno stopanstvo [Fisheries]"},{"issue":"1 \u2013 Biology","key":"5_CR4","first-page":"301","volume":"51","author":"R. Beltscheva","year":"1959","unstructured":"Beltscheva, R., 1959. [Untersuchungen im Stausee \u2018\u2018W. Kolarow\u2019\u2019 zwecks seiner Ausnutzung f\u00fcr der Fischwirtschaft]. Godishnik na Sofiiskiya universitet. Biologo-geologo-geografski fakultet (Annuaire de l\u2019Universit\u00e9 de Sofia, Facult\u00e9 de Biologie, G\u00e9ologie et G\u00e9ographie) 51( 1 \u2013 Biology):301\u2013338 (in Bulgarian).","journal-title":"Biologo-geologo-geografski fakultet (Annuaire de l\u2019Universit\u00e9 de Sofia, Facult\u00e9 de Biologie, G\u00e9ologie et G\u00e9ographie)"},{"key":"5_CR5","first-page":"33","volume-title":"Biological Diversity of the Rila National Park","author":"P. Beron","year":"2000","unstructured":"Beron, P., V. Beshkov, V. Popov, M. Vassilev, R. Pandurska &T. Ivanova, 2000. Biodiversity of small vertebrates (Pisces, Amphibia, Reptilia, Mammalia \u2013 Insectivora, Chiroptera, Lagomorpha and Rodentia) in the Rila National Park. In Sakalian, M. (ed), Biological Diversity of the Rila National Park. Pensoft, Sofia: 33\u2013360."},{"key":"5_CR6","first-page":"195","volume":"8","author":"V. Beshovski","year":"1967","unstructured":"Beshovski, V.,1967. [Carp and perch-pike feed in the Bourgasko, Mandrensko and Blatnishko lakes along the Bulgarian Black Sea coast]. Izvestiya na Nauchnoizsledovatelskiya institut za ribno stopanstvo i okeanografiya \u2013 Varna (Proceedings of the Research Institute of Fisheries and Oceanography \u2013 Varna) 8:195\u2013209 (in Bulgarian).","journal-title":"Izvestiya na Nauchnoizsledovatelskiya institut za ribno stopanstvo i okeanografiya \u2013 Varna (Proceedings of the Research Institute of Fisheries and Oceanography \u2013 Varna)"},{"key":"5_CR7","first-page":"251","volume":"7","author":"K. Bulgurkov","year":"1958","unstructured":"Bulgurkov, K., 1958. [Hydrological peculiarities of the reserve of Lake Srebarna and composition of its fish fauna]. Izvestiya na Zoologicheskiya institut (Bulletin de l\u2019Institut zoologique de l\u2019Acad\u00e9mie des sciences de Bulgarie) 7:251\u2013268 (in Bulgarian).","journal-title":"Izvestiya na Zoologicheskiya institut (Bulletin de l\u2019Institut zoologique de l\u2019Acad\u00e9mie des sciences de Bulgarie)"},{"key":"5_CR8","first-page":"158","volume":"25","author":"G. Chichkoff","year":"1929","unstructured":"Chichkoff, G., 1929. [Sur un nouveau poisson du genre Gobio Cuvier, Gobio similis n. sp.] Godishnik na Sofiiskiya universitet. Fiziko-matematicheski fakultet (Annuaire de l\u2019Universit\u00e9 de Sofia. Facult\u00e9 physico-math\u00e9matique) 25(3 \u2013 Natural History):158\u2013174 (in Bulgarian).","journal-title":"Fiziko-matematicheski fakultet (Annuaire de l\u2019Universit\u00e9 de Sofia. Facult\u00e9 physico-math\u00e9matique)"},{"issue":"2","key":"5_CR9","first-page":"18","volume":"7","author":"G. Chichkoff","year":"1937a","unstructured":"Chichkoff, G., 1937a. [Est-t\u2019il present dans les eaux douces de la Bulgarie Leuciscus leuciscus?] Ribarski pregled [Fishing Review] 7(2):18\u201320 (in Bulgarian).","journal-title":"Ribarski pregled [Fishing Review]"},{"issue":"5","key":"5_CR10","first-page":"66","volume":"7","author":"G. Chichkoff","year":"1937b","unstructured":"Chichkoff, G., 1937b. [Les poissons de la rivi\u00e9re Vit]. Ribarski pregled [Fishing Review] 7(5):66\u201368 (in Bulgarian).","journal-title":"Ribarski pregled [Fishing Review"},{"key":"5_CR11","first-page":"91","volume":"35","author":"G. Chichkoff","year":"1939a","unstructured":"Chichkoff, G., 1939a. [Poissons nouveaux et peu connus des eaux douces de la Bulgarie]. Godishnik na Sofiiskiya universitet. Fiziko-matematicheski fakultet (Annuaire de l\u2019Universit\u00e9 de Sofia. Facult\u00e9 physico-math\u00e9matique) 35(3 \u2013 Natural History):91\u2013199 (in Bulgarian).","journal-title":"Godishnik na Sofiiskiya universitet. Fiziko-matematicheski fakultet (Annuaire de l\u2019Universit\u00e9 de Sofia. Facult\u00e9 physico-math\u00e9matique)"},{"issue":"4","key":"5_CR12","first-page":"1","volume":"9","author":"G. Chichkoff","year":"1939","unstructured":"Chichkoff, G., 1939b. [Les poissons des rivi\u00e9res du bassin de la Mer Eg\u00e9e]. Ribarski pregled [Fishing Review] 9(4):1\u20133 (in Bulgarian).","journal-title":"Ribarski pregled [Fishing Review]"},{"issue":"8","key":"5_CR13","first-page":"4","volume":"9","author":"G. Chichkoff","year":"1939c","unstructured":"Chichkoff, G., 1939c. [Sur la p\u00eache de la rivi\u00e9re Iskar]. Ribarski pregled [Fishing Review] 9(8):4\u20137 (in Bulgarian).","journal-title":"Ribarski pregled [Fishing Review]"},{"key":"5_CR14","first-page":"21","volume":"36","author":"G. Chichkoff","year":"1940a","unstructured":"Chichkoff, G., 1940a. [Etudes morphologiques sur le vairon Phoxinus phoxinus L. habitant les eaux douces de la Bulgarie]. Godishnik na Sofiiskiya universitet. Fiziko-matematicheski fakultet (Annuaire de l\u2019Universit\u00e9 de Sofia. Facult\u00e9 physico-math\u00e9matique) 36(3 \u2013 Natural History):21\u201371 (in Bulgarian).","journal-title":"Fiziko-matematicheski fakultet (Annuaire de l\u2019Universit\u00e9 de Sofia. Facult\u00e9 physico-math\u00e9matique)"},{"key":"5_CR15","first-page":"73","volume":"36","author":"G. Chichkoff","year":"1940b","unstructured":"Chichkoff, G., 1940b. [Etude morphologique sur les spirlins (Alburnoides) des eaux douces de la Bulgarie]. Godishnik na Sofiiskiya universitet. Fiziko-matematicheski fakultet (Annuaire de l\u2019Universit\u00e9 de Sofia. Facult\u00e9 physico-math\u00e9matique) 36(3 \u2013 Natural History):73\u2013146 (in Bulgarian).","journal-title":"Godishnik na Sofiiskiya universitet. Fiziko-matematicheski fakultet (Annuaire de l\u2019Universit\u00e9 de Sofia. Facult\u00e9 physico-math\u00e9matique)"},{"key":"5_CR16","first-page":"31","volume":"37","author":"G. Chichkoff","year":"1941","unstructured":"Chichkoff, G., 1941. [Etude morphologique sur l\u2019ablette commune (Alburnus alburnus) habitant les eaux douces de la Bulgarie]. Godishnik na Sofiiskiya universitet. Fiziko-matematicheski fakultet (Annuaire de l\u2019Universit\u00e9 de Sofia. Facult\u00e9 physico-math\u00e9matique) 37(3 \u2013 Natural History):31\u201391 (in Bulgarian).","journal-title":"Fiziko-matematicheski fakultet (Annuaire de l\u2019Universit\u00e9 de Sofia. Facult\u00e9 physico-math\u00e9matique)"},{"key":"5_CR17","first-page":"1","volume":"39","author":"G. Chichkoff","year":"1943","unstructured":"Chichkoff, G., 1943. [Etudes morphologiques sur Leuciscus cephalus et Rutilus rutilus r\u00e9pandus dans nos eaux douces]. Godishnik na Sofiiskiya universitet. Fiziko-matematicheski fakultet (Annuaire de l\u2019Universit\u00e9 de Sofia. Facult\u00e9 physico-math\u00e9matique) 39(3 \u2013 Natural History):1\u201367 (in Bulgarian).","journal-title":"Fiziko-matematicheski fakultet (Annuaire de l\u2019Universit\u00e9 de Sofia. Facult\u00e9 physico-math\u00e9matique)"},{"key":"5_CR18","first-page":"59","volume":"33","author":"C. Dikov","year":"1988","unstructured":"Dikov, C., J. Jankov & S. Jocev, 1988. [Ichthyofauna composition, number and biomass of the different species in the river Palakarija, a tributary of the river Iskar]. Hidrobiologiya (Hydrobiology) (Sofia) 33:59\u201368 (in Bulgarian).","journal-title":"Hidrobiologiya (Hydrobiology) (Sofia)"},{"key":"5_CR19","first-page":"81","volume":"26","author":"Ts. Dikov","year":"1985","unstructured":"Dikov, Ts. & M. Zhivkov, 1985. [A comparative analysis of the growth of the barbel (Barbus tauricus cyclolepis Heckel) in the Dzerman River and the Dospat Dam]. Hidrobiologiya (Hydrobiology) (Sofia) 26:81\u201390 (in Bulgarian).","journal-title":"Hidrobiologiya (Hydrobiology) (Sofia)"},{"key":"5_CR20","first-page":"157","volume":"1","author":"M. Dimitrov","year":"1957","unstructured":"Dimitrov, M., 1957. [Hydrological and hydrobiological characteristics of Al. Stamboliiski Dam Lake]. Nauchni trudove. Nauchno-izsledovatelski institut po ribarstvo i ribna promishlenost \u2013 Varna (Travaux scientifiques. Institut de recherches scientifiques sur la p\u00eache et les industries s\u2019y rattachant \u2013 Varna) 1:157\u2013197 (in Bulgarian).","journal-title":"Nauchni trudove. Nauchno-izsledovatelski institut po ribarstvo i ribna promishlenost \u2013 Varna (Travaux scientifiques. Institut de recherches scientifiques sur la p\u00eache et les industries s\u2019y rattachant \u2013 Varna)"},{"key":"5_CR21","first-page":"87","volume":"1","author":"M. Dimitrov","year":"1960","unstructured":"Dimitrov, M., 1960. [Hydrologische und hydrobiologische Charakteristik der Talsperre \u2018\u2018G. Dimitrov\u2019\u2019]. Trudove na Tsentralniya nauchnoizsledovatelski institut po ribovadstvo i ribolov. Sektsiya Sladkovodno ribarstvo \u2013 Plovdiv (Arbeiten des Zentralen Forschungsinstitutes f\u00fcr Fischzucht und Fischerei. Abteilung S\u00fcsswasserfischerei \u2013 Plowdiw (Bulgarien)) 1:87\u2013122 (in Bulgarian).","journal-title":"Abteilung S\u00fcsswasserfischerei \u2013 Plowdiw (Bulgarien))"},{"key":"5_CR22","first-page":"339","volume":"8","author":"M. Dimitrov","year":"1967","unstructured":"Dimitrov, M. & Zh. Lyudskanova, 1967. [Feeds and feeding correlation of commercial fish in the \u2018\u2018G. Dimitrov\u2019\u2019 Dam]. Izvestiya na Nauchnoizsledovatelskiya institut za ribno stopanstvo i okeanografiya \u2013 Varna (Proceedings of the Research Institute of Fisheries and Oceanography \u2013 Varna) 8:339\u2013358 (in Bulgarian).","journal-title":"Izvestiya na Nauchnoizsledovatelskiya institut za ribno stopanstvo i okeanografiya \u2013 Varna (Proceedings of the Research Institute of Fisheries and Oceanography \u2013 Varna)"},{"key":"5_CR23","first-page":"35","volume":"7","author":"M. Dimitrov","year":"1970","unstructured":"Dimitrov, M. & Zh. Lyudskanova, 1970. [The role of grass carp in the productivity of carp-breeding ponds]. Izvestiya na Stantsiyata po sladkovodno ribarstvo, Plovdiv [Mitteilungen der Versuchsstation f\u00fcr S\u00fcsswasserfischzucht, Plovdiv; Proceedings of the Freshwater Fishery Research Station, Plovdiv), 7:35\u201343 (in Bulgarian).","journal-title":"Izvestiya na Stantsiyata po sladkovodno ribarstvo, Plovdiv [Mitteilungen der Versuchsstation f\u00fcr S\u00fcsswasserfischzucht, Plovdiv; Proceedings of the Freshwater Fishery Research Station, Plovdiv)"},{"key":"5_CR24","first-page":"5","volume":"9","author":"P. Drensky","year":"1921","unstructured":"Drensky, P., 1921. [The fishing in the Iskar River]. Svedeniya po zemledelieto [Information on Agriculture] 9:5\u201316 (in Bulgarian).","journal-title":"Svedeniya po zemledelieto [Information on Agriculture]"},{"key":"5_CR25","first-page":"6","volume":"11","author":"P. Drensky","year":"1923a","unstructured":"Drensky, P., 1923a. [Eupomotis gibbosus L. one new fish in the Lake Svishtovsko]. Svedeniya po zemledelieto [Information on Agriculture] 11:6\u20137 (in Bulgarian).","journal-title":"Svedeniya po zemledelieto [Information on Agriculture]"},{"key":"5_CR26","first-page":"59","volume":"25","author":"P. Drensky","year":"1923b","unstructured":"Drensky, P., 1923b. [Contribution \u00e1 l\u2019\u00e9tude des poissons de la Mer Noire, r\u00e9coltes sur le cotes bulgares]. Spisanie na Balgarskata akademiya na naukite. Klon prirodo-matematichen [Journal of the Bulgarian Academy of Sciences. Natural-Mathematical Series] 25:59\u2013112 (in Bulgarian).","journal-title":"[Journal of the Bulgarian Academy of Sciences. Natural-Mathematical Series]"},{"key":"5_CR27","first-page":"121","volume":"12","author":"P. Drensky","year":"1926","unstructured":"Drensky, P., 1926. [Neue und seltene Fische aus Bulgarien]. Trudove na Balgarskoto prirodoizpitatelno druzhestvo (Travaux de la Soci\u00e9t\u00e9 bulgare des sciences naturelles) 12:121\u2013150 (in Bulgarian).","journal-title":"Trudove na Balgarskoto prirodoizpitatelno druzhestvo (Travaux de la Soci\u00e9t\u00e9 bulgare des sciences naturelles)"},{"key":"5_CR28","first-page":"156","volume":"1","author":"P. Drensky","year":"1928","unstructured":"Drensky, P., 1928. [Die Fische der Familie Cobitidae in Bulgarien]. Izvestiya na Tsarskite prirodonauchni instituti v Sofia (Mitteilungen aus den K\u00f6niglichen naturwissenschaftlichen Instituten in Sofia \u2013 Bulgarien; Bulletin des Institutions royales d\u2019histoire naturelle \u00e1 Sofia \u2013 Bulgarie) 1:156\u2013181 (in Bulgarian).","journal-title":"Izvestiya na Tsarskite prirodonauchni instituti v Sofia (Mitteilungen aus den K\u00f6niglichen naturwissenschaftlichen Instituten in Sofia \u2013 Bulgarien; Bulletin des Institutions royales d\u2019histoire naturelle \u00e1 Sofia \u2013 Bulgarie)"},{"key":"5_CR29","first-page":"171","volume":"4","author":"P. Drensky","year":"1932","unstructured":"Drensky, P., 1932. [Fishes and fishery of Osam River]. Lovech i Lovchansko [Lovech and surroundings] 4:171\u2013200 (in Bulgarian).","journal-title":"Lovech i Lovchansko [Lovech and surroundings]"},{"key":"5_CR30","first-page":"79","volume":"7","author":"P. Drensky","year":"1934","unstructured":"Drensky, P., 1934. [Alosa bulgarica nov. sp., ein bis jetzt unbekannter Fisch aus den Fl\u00fcssen der bulgarischen K\u00fcste des Schwarzen Meeres, s\u00fcdlich von Burgas]. Izvestiya na Tsarskite prirodonauchni instituti v Sofia (Mitteilungen aus den K\u00f6niglichen naturwissenschaftlichen Instituten in Sofia \u2013 Bulgarien; Bulletin des Institutions royales d\u2019histoire naturelle \u00e1 Sofia \u2013 Bulgarie) 7:79\u201387 (in Bulgarian).","journal-title":"Izvestiya na Tsarskite prirodonauchni instituti v Sofia (Mitteilungen aus den K\u00f6niglichen naturwissenschaftlichen Instituten in Sofia \u2013 Bulgarien; Bulletin des Institutions royales d\u2019histoire naturelle \u00e1 Sofia \u2013 Bulgarie)"},{"key":"5_CR31","first-page":"343","volume":"39","author":"P. Drensky","year":"1943","unstructured":"Drensky, P., 1943. [Chalcalburnus chalcoides Guld. in Bulgarien]. Godishnik na Sofiiskiya universitet. Fiziko-matematicheski fakultet (Annuaire de l\u2019Universit\u00e9 de Sofia. Facult\u00e9 physico-math\u00e9matique) 39(3 \u2013 Natural History):343\u2013360 (in Bulgarian).","journal-title":"Fiziko-matematicheski fakultet (Annuaire de l\u2019Universit\u00e9 de Sofia. Facult\u00e9 physico-math\u00e9matique)"},{"key":"5_CR32","first-page":"11","volume":"44","author":"P. Drensky","year":"1948","unstructured":"Drensky, P., 1948. [Synopsis and distribution of fishes in Bulgaria]. Godishnik na Sofiiskiya universitet. Fiziko-matematicheski fakultet (Annuaire de l\u2019Universit\u00e9 de Sofia. Facult\u00e9 physico-math\u00e9matique) 44(3 \u2013 Natural History):11\u201371 (in Bulgarian).","journal-title":"Fiziko-matematicheski fakultet (Annuaire de l\u2019Universit\u00e9 de Sofia. Facult\u00e9 physico-math\u00e9matique)"},{"key":"5_CR33","volume-title":"Balgarska akademiya na naukite","author":"P. Drensky","year":"1951","unstructured":"Drensky, P., 1951. [The Fishes of Bulgaria]. In: Buresch, I. (ed.). Fauna na Balgariya. 2 [Fauna bulgarica. 2]. Balgarska akademiya na naukite [Bulgarian Academy of Sciences], Sofia (in Bulgarian)."},{"key":"5_CR34","unstructured":"Fischer, W., M. Schneider, M. & M.-L. Bauchot (eds), 1987. Mediterran\u00e9e et Mer Noire. Zone de p\u00eache 37. Volume II. Vertebres. FAO, CEE, Organisation des Nations Unies pour l\u2019Alimentation et l\u2019Agriculture, Rome: 761\u20131530."},{"key":"5_CR35","unstructured":"Georgieff, G.; Georgiev, J.; Gheorghiev, J. see Manolov-Gueorguiev, J."},{"key":"5_CR36","first-page":"70","volume":"2","author":"G. Grupcheva","year":"1975","unstructured":"Grupcheva, G., 1975. [Protozoan parasites of the rainbow trout (Salmo gairdneri Richardson) in some fish-breeding farms in Bulgaria]. Acta zoologica bulgarica 2:70\u201382 (in Bulgarian).","journal-title":"Acta zoologica bulgarica"},{"key":"5_CR37","first-page":"7","volume":"18","author":"E. Ivanov","year":"1980","unstructured":"Ivanov, E., A. Rozhdestvenski, T. Marinov, V. Petrova-Karadjova, A. Konsulov & S. Mitev, 1980. [On the hydrochemical conditions, nutritive base and fish stocks in Mandra dam]. Izvestiya. Institut po ribni resursi \u2013 Varna (Proceedings. Institute of Fisheries \u2013 Varna) 18:7\u201370 (in Bulgarian).","journal-title":"Izvestiya. Institut po ribni resursi \u2013 Varna (Proceedings. Institute of Fisheries \u2013 Varna)"},{"key":"5_CR38","first-page":"68","volume":"32","author":"J. Jankov","year":"1988","unstructured":"Jankov, J. & M. Zivkov, 1988. [Maturing and size-sex ratio of the brown trout populations (Salmo trutta fario L.) in the main trout rivers in Bulgaria]. Hidrobiologiya (Hydrobiology) (Sofia) 32:68\u201384 (in Bulgarian).","journal-title":"Hidrobiologiya (Hydrobiology) (Sofia)"},{"key":"5_CR39","first-page":"399","volume":"8","author":"S. Kamburova","year":"1967","unstructured":"Kamburova, S. & E. Kechaijov, 1967. [Versuche zur Einf\u00fchrung erg\u00e4nzender Fischarten in den Karpfenzuchtwirtschaften]. Izvestiya na Nauchnoizsledovatelskiya Institut za ribno stopanstvo i okeanografiya [Proceedings of the Research Institute of Fisheries and Oceanography], Varna, 8:399\u2013406 (in Bulgarian).","journal-title":"Izvestiya na Nauchnoizsledovatelskiya Institut za ribno stopanstvo i okeanografiya [Proceedings of the Research Institute of Fisheries and Oceanography], Varna"},{"issue":"1","key":"5_CR40","first-page":"82","volume":"9","author":"M. Karapetkova","year":"1960","unstructured":"Karapetkova, M., 1960. [A new species for our Black Sea ichthyofauna, Arnoglossus kessleri Schmidt]. Priroda [Nature] (Sofia) 9(1):82\u201384 (in Bulgarian).","journal-title":"Priroda [Nature] (Sofia)"},{"key":"5_CR41","first-page":"149","volume":"36","author":"M. Karapetkova","year":"1972","unstructured":"Karapetkova, M., 1972. [L\u2019ichthyofaune de la rivi\u00e9re Yantra]. Izvestiya na Zoologicheskiya institut s muzei (Bulletin de l\u2019Institut de zoologie et mus\u00e9e) 36:149\u2013182 (in Bulgarian).","journal-title":"Izvestiya na Zoologicheskiya institut s muzei (Bulletin de l\u2019Institut de zoologie et mus\u00e9e)"},{"key":"5_CR42","first-page":"85","volume":"39","author":"M. Karapetkova","year":"1974","unstructured":"Karapetkova, M., 1974. [Ichthyofaune de la rivi\u00e9re Kamtchia]. Izvestiya na Zoologicheskiya institut s muzei (Bulletin de l\u2019Institut de zoologie et mus\u00e9e) 39:85\u201398 (in Bulgarian).","journal-title":"Izvestiya na Zoologicheskiya institut s muzei (Bulletin de l\u2019Institut de zoologie et mus\u00e9e)"},{"key":"5_CR43","first-page":"54","volume":"1","author":"M. Karapetkova","year":"1975","unstructured":"Karapetkova, M., 1975. [Ichthyological characteristics of the Veleka River]. Hidrobiologiya (Hydrobiology) (Sofia) 1:54\u201364 (in Bulgarian).","journal-title":"Hidrobiologiya (Hydrobiology) (Sofia)"},{"key":"5_CR44","first-page":"52","volume":"4","author":"M. Karapetkova","year":"1976","unstructured":"Karapetkova, M., 1976. [Composition et caract\u00e9re de l\u2019ichthyofaune des rivi\u00e9res bulgares se jetant dans la Mer Noire]. Hidrobiologiya [Hydrobiology] (Sofia) 4:52\u201359 (in Bulgarian).","journal-title":"Hidrobiologiya [Hydrobiology] (Sofia)"},{"key":"5_CR45","first-page":"378","volume-title":"Limnologische Berichte der 21","author":"M. Karapetkova","year":"1979","unstructured":"Karapetkova, M., 1979. \u00dcbersicht der Ichthyofauna der bulgarischen Donauzufl\u00fcsse. In: Limnologische Berichte der 21. Tagung der IAD. Novi Sad, Yugoslavia, pp. 378\u2013384."},{"key":"5_CR46","unstructured":"Karapetkova, M., 1985. [Some characteristic peculiarities of the Bulgarian freshwater fish fauna and the problems of its protection]. In Natsionalen simpozium po biologiya, Mihailovgrad, septemvri 1984 [National Biological Symposium, Mihailovgrad, September 1984]: 54\u201358 (in Bulgarian)."},{"key":"5_CR47","first-page":"84","volume-title":"Biodiversity of the Srebarna Biosphere Reserve. Checklist and bibliography","author":"M. Karapetkova","year":"1998","unstructured":"Karapetkova, M., 1998. Class Pisces (Fishes). In Michev, T., B. Georgiev, A. Petrova & M. Stoyneva (eds). Biodiversity of the Srebarna Biosphere Reserve. Checklist and bibliography. Context & Pensoft, Sofia: 84\u201385."},{"key":"5_CR48","first-page":"3","volume":"28","author":"M. Karapetkova","year":"1986","unstructured":"Karapetkova, M. & C. Dikov, 1986. [On the composition, distribution number and biomass of the ichthyofauna in the Vit River]. Hidrobiologiya (Hydrobiology) (Sofia) 28:3\u201314 (in Bulgarian).","journal-title":"Hidrobiologiya (Hydrobiology) (Sofia)"},{"key":"5_CR49","first-page":"75","volume":"37","author":"M. Karapetkova","year":"1991","unstructured":"Karapetkova, M. & B. Marinov, 1991. [A new species for ichthyofauna in Bulgaria, Leuciscus souffia Risso, 1826]. Hidrobiologiya (Hydrobiology) (Sofia) 37:75\u201378.","journal-title":"Hidrobiologiya (Hydrobiology) (Sofia)"},{"key":"5_CR50","first-page":"183","volume":"38","author":"M. Karapetkova","year":"1973","unstructured":"Karapetkova, M. & I. Pechev., 1973. [L\u2019ichthyofaune de la rivi\u00e9re Ropotamo]. Izvestiya na Zoologicheskiya institut s muzei (Bulletin de l\u2019Institut de zoologie et mus\u00e9e) 38:183\u2013194 (in Bulgarian).","journal-title":"Izvestiya na Zoologicheskiya institut s muzei (Bulletin de l\u2019Institut de zoologie et mus\u00e9e)"},{"key":"5_CR51","first-page":"44","volume":"32","author":"M. Karapetkova","year":"1988","unstructured":"Karapetkova, M. & E. Und\u017eian, 1988. [The ichthyofauna of the river valley of the Roussenski Lom River]. Hidrobiologiya (Hydrobiology) (Sofia) 32:44\u201350 (in Bulgarian).","journal-title":"Hidrobiologiya (Hydrobiology) (Sofia)"},{"key":"5_CR52","volume-title":"Geya-Libris","author":"M. Karapetkova","year":"1995","unstructured":"Karapetkova, M. ,& M. Zivkov, 1995. Ribite v Balgariya [Fishes in Bulgaria]. Geya-Libris [Gea-Libris], Sofia (in Bulgarian)."},{"key":"5_CR53","unstructured":"Karapetkova, M., M. Zivkov & K. Alexandrova-Kolemanova, 1998. Freshwater fish of Bulgaria. In Meine, C. (ed), Bulgaria\u2019s Biological Diversity: Conservation Status and Needs Assessment. Volumes I and II. Pensoft, Sofia & Moscow: 347\u2013374."},{"key":"5_CR54","first-page":"212","volume":"3","author":"M. Karapetkova","year":"1995","unstructured":". Karapetkova, M., M. Zivkov, G. Raikova-Petrova ,& E. Nikolova, 1995. Content of toxic elements in bioindicatory species of fish and amphibians from Rila Mountain. Observatoire de montagne de Moussala, OM2, 3:212\u2013217.","journal-title":"Observatoire de montagne de Moussala, OM2"},{"key":"5_CR55","volume-title":"Sotsialno-ikonomicheska geografiya [Geography of Bulgaria. Physical Geography. Socio-Economic Geography]","author":"I. Kopralev","year":"2002","unstructured":"Kopralev, I., M. Yordanova & Ch. Mladenov (eds), 2002. Geografiya na Balgariya. Fizicheska geografiya. Sotsialno-ikonomicheska geografiya [Geography of Bulgaria. Physical Geography. Socio-Economic Geography]. ForCom, Sofia (in Bulgarian)."},{"key":"5_CR56","first-page":"1","volume":"5)","author":"M. Kottelat","year":"1997","unstructured":"Kottelat, M., 1997. European freshwater fishes. An heuristic checklist of the freshwater fishes of Europe (exclusive of former USSR), with an introduction for non-systematists and comments on nomenclature and conservation. Biologia 52(Suppl. 5):1\u2013271.","journal-title":"Biologia 52(Suppl"},{"key":"5_CR57","unstructured":"Kovatcheff, V., 1909. [Contribution \u00e1 la ichthyofaune bulgare]. Godishnik na Rusenskata mazhka gimnaziya (Annuaire du gymnase de gar\u00e7ons de Rousse):3\u20137 (in Bulgarian)."},{"key":"5_CR58","first-page":"87","volume":"9","author":"V. Kovatcheff","year":"1921a","unstructured":"Kovatcheff, V., 1921a. [Les populations des poissons de la rivi\u00e9re Strouma]. Trudove na Balgarskoto prirodoizpitatelno druzhestvo (Travaux de la Soci\u00e9t\u00e9 bulgare des sciences naturelles) 9:87\u201389 (in Bulgarian).","journal-title":"Trudove na Balgarskoto prirodoizpitatelno druzhestvo (Travaux de la Soci\u00e9t\u00e9 bulgare des sciences naturelles)"},{"key":"5_CR59","first-page":"90","volume":"9","author":"V. Kovatcheff","year":"1921b","unstructured":"Kovatcheff, V., 1921b. [Une \u00e9tude sur la faune ichthyologique de la rivi\u00e9re Mariza et ses affluents]. Trudove na Balgarskoto prirodoizpitatelno druzhestvo (Travaux de la Soci\u00e9t\u00e9 bulgare des sciences naturelles) 9:90\u201394 (in Bulgarian).","journal-title":"Trudove na Balgarskoto prirodoizpitatelno druzhestvo (Travaux de la Soci\u00e9t\u00e9 bulgare des sciences naturelles)"},{"key":"5_CR60","first-page":"1","volume":"3","author":"V. Kovatcheff","year":"1923","unstructured":"Kovatcheff, V., 1923. [Faune des poissons d\u2019eau douce en Bulgarie]. Arhiv na Ministerstvo na zemledelieto (Archives du Minist\u00e9re de l\u2019agriculture) 3:1\u2013163 (in Bulgarian).","journal-title":"Arhiv na Ministerstvo na zemledelieto (Archives du Minist\u00e9re de l\u2019agriculture)"},{"key":"5_CR61","first-page":"245","volume":"3","author":"G. Georgieff","year":"1954","unstructured":"Georgieff, G., 1954. [Nouvelle esp\u00e9ce pour notre ichthyofaune de la Mer Noire]. Izvestiya na Zoologicheskiya institut (Bulletin de l\u2019Institut zoologique de l\u2019Acad\u00e9mie bulgare des sciences) 3:245\u2013250 (in Bulgarian).","journal-title":"Izvestiya na Zoologicheskiya institut (Bulletin de l\u2019Institut zoologique de l\u2019Acad\u00e9mie bulgare des sciences)"},{"key":"5_CR62","first-page":"35","volume":"2","author":"J. Gheorghiev","year":"1960","unstructured":"[Manolov-Gueorguiev, J.] Gheorghiev, J., 1960. [Une nouvelle esp\u00e9ce pour l\u2019ichthyofaune bulgare Euthynnus alletteratus (Raf.)]. Trudove na Nauchnoizsledovatelskiya institut po ribarstvo i ribna promishlenost \u2013 Varna (Travaux de l\u2019Institut de recherches scientifiques sur la p\u00eache et les industries s\u2019y rattachant \u2013 Varna (Bulgarie)) 2:35\u201340 (in Bulgarian).","journal-title":"Trudove na Nauchnoizsledovatelskiya institut po ribarstvo i ribna promishlenost \u2013 Varna (Travaux de l\u2019Institut de recherches scientifiques sur la p\u00eache et les industries s\u2019y rattachant \u2013 Varna (Bulgarie))"},{"key":"5_CR63","first-page":"159","volume":"7","author":"J. Manolov-Gheorghiev","year":"1966","unstructured":"Manolov-Gheorghiev, J., 1966. [Composition d\u2019esp\u00e9ce et caract\u00e9ristique des Gobiides (Pisces) en Bulgarie]. Izvestiya na Nauchnoizsledovatelskiya institut za ribno stopanstvo i okeanografiya \u2013 Varna (Proceedings of the Research Institute of Fisheries and Oceanography \u2013 Varna) 7:159\u2013228 (in Bulgarian).","journal-title":"Izvestiya na Nauchnoizsledovatelskiya institut za ribno stopanstvo i okeanografiya \u2013 Varna (Proceedings of the Research Institute of Fisheries and Oceanography \u2013 Varna)"},{"key":"5_CR64","first-page":"211","volume":"8","author":"J. Manolov-Gueorguiev","year":"1967","unstructured":"Manolov-Gueorguiev, J., 1967. [Composition d\u2019esp\u00e9ce de l\u2019ichthyofaune des lacs bulgares de la Mer Noire]. Izvestiya na Nauchnoizsledovatelskiya institut za ribno stopanstvo i okeanografiya \u2013 Varna (Proceedings of the Research Institute of Fisheries and Oceanography \u2013 Varna) 8:211\u2013227 (in Bulgarian).","journal-title":"Izvestiya na Nauchnoizsledovatelskiya institut za ribno stopanstvo i okeanografiya \u2013 Varna (Proceedings of the Research Institute of Fisheries and Oceanography \u2013 Varna)"},{"key":"5_CR65","first-page":"165","volume":"10","author":"J. Manolov","year":"1970","unstructured":"Manolov, J., 1970. [Aper\u00e7u sur la composition d\u2019esp\u00e9ce de la famille Sparidae (Pisces) dans les eaux du littoral bulgare de la Mer Noire]. Izvestiya na Instituta po okeanografiya i ribno stopanstvo \u2013 Varna (Proceedings of the Institute of Oceanography and Fisheries \u2013 Varna) 10:165\u2013189 (in Bulgarian).","journal-title":"Izvestiya na Instituta po okeanografiya i ribno stopanstvo \u2013 Varna (Proceedings of the Institute of Oceanography and Fisheries \u2013 Varna)"},{"key":"5_CR66","first-page":"351","volume":"7","author":"J. Manolov-Gueorguiev","year":"1958","unstructured":"[Manolov-Gueorguiev, J.] Georgiev, J. & P. Kolarov, 1958. [Eine neue Fischart in der bulgarischen Fauna \u2013 Alosa fallax nilotica Geoffroy]. Izvestiya na Zoologicheskiya institut (Bulletin de l\u2019Institut zoologique de l\u2019Acad\u00e9mie des sciences de Bulgarie) 7:351\u2013356 (in Bulgarian).","journal-title":"Izvestiya na Zoologicheskiya institut (Bulletin de l\u2019Institut zoologique de l\u2019Acad\u00e9mie des sciences de Bulgarie)"},{"issue":"1 \u2013 Zoology","key":"5_CR67","first-page":"227","volume":"56","author":"B. Marinov","year":"1964","unstructured":"Marinov, B., 1964. [Ein neuer Fundort von Leuciscus borysthenicus (Kessler) im System des \u00c4g\u00e4ischen Meeres]. Godishnik na Sofiiskiya universitet \u2018\u2018Kliment Ohridski\u2019\u2019. Biologicheski fakultet (Annuaire de l\u2019Universit\u00e9 de Sofia \u2018\u2018Kliment Ohridski\u2019\u2019, Facult\u00e9 de Biologie) 56(1 \u2013 Zoology):227\u2013231 (in Bulgarian).","journal-title":"Biologicheski fakultet (Annuaire de l\u2019Universit\u00e9 de Sofia \u2018\u2018Kliment Ohridski\u2019\u2019, Facult\u00e9 de Biologie)"},{"key":"5_CR68","first-page":"139","volume":"20","author":"B. Marinov","year":"1966a","unstructured":"Marinov, B., 1966a. [\u00dcber die Fischfauna des bulgarischen Donausektors]. Izvestiya na Zoologicheskiya institut s muzei (Bulletin de l\u2019Institut de zoologie et mus\u00e9e) 20:139\u2013155 (in Bulgarian).","journal-title":"Izvestiya na Zoologicheskiya institut s muzei (Bulletin de l\u2019Institut de zoologie et mus\u00e9e)"},{"key":"5_CR69","first-page":"153","volume":"21","author":"B. Marinov","year":"1966b","unstructured":"Marinov, B., 1966b. [Cobitis elongata Heckel et Kner, 1858 \u2013 eine f\u00fcr die Ichthyofauna Bulgariens neue Art]. Izvestiya na Zoologicheskiya institut s muzei (Bulletin de l\u2019Institut de zoologie et mus\u00e9e) 21:153\u2013156 (in Bulgarian).","journal-title":"Izvestiya na Zoologicheskiya institut s muzei (Bulletin de l\u2019Institut de zoologie et mus\u00e9e)"},{"issue":"1 \u2013 Zoology","key":"5_CR70","first-page":"39","volume":"59","author":"B. Marinov","year":"1967","unstructured":"Marinov, B., 1967. [Gobio albipinnatus Lukasch, 1933, a fish unknown to Bulgaria]. Godishnik na Sofiiskiya universitet \u2018\u2018Kliment Ohridski\u2019\u2019. Biologicheski fakultet (Annuaire de l\u2019Universit\u00e9 de Sofia \u2018\u2018Kliment Ohridski\u2019\u2019, Facult\u00e9 de Biologie) 59(1 \u2013 Zoology):39\u201341 (in Bulgarian).","journal-title":"Biologicheski fakultet (Annuaire de l\u2019Universit\u00e9 de Sofia \u2018\u2018Kliment Ohridski\u2019\u2019, Facult\u00e9 de Biologie)"},{"issue":"1","key":"5_CR71","first-page":"101","volume":"65","author":"B. Marinov","year":"1973a","unstructured":"Marinov, B., 1973a. [\u00dcber die systematische Lage der Unterarten von Gobio gobio (L., 1758) aus Bulgarien]. Godishnik na Sofiiskiya universitet \u2018\u2018Kliment Ohridski\u2019\u2019. Biologicheski fakultet (Annuaire de l\u2019Universit\u00e9 de Sofia \u2018\u2018Kliment Ohridski\u2019\u2019, Facult\u00e9 de Biologie) 65(1 \u2013 Zoology):101\u2013115 (in Bulgarian).","journal-title":"Biologicheski fakultet (Annuaire de l\u2019Universit\u00e9 de Sofia \u2018\u2018Kliment Ohridski\u2019\u2019, Facult\u00e9 de Biologie)"},{"issue":"1 \u2013 Zoology","key":"5_CR72","first-page":"117","volume":"65","author":"B. Marinov","year":"1973b","unstructured":"Marinov, B., 1973b. [\u00dcber die systematische Lage der Unterarten von Alburnoides bipunctatus (Bloch, 1782) aus Bulgarien]. Godishnik na Sofiiskiya universitet \u2018\u2018Kliment Ohridski\u2019\u2019. Biologicheski fakultet (Annuaire de l\u2019Universit\u00e9 de Sofia \u2018\u2018Kliment Ohridski\u2019\u2019, Facult\u00e9 de Biologie) 65(1 \u2013 Zoology):117\u2013125 (in Bulgarian).","journal-title":"Godishnik na Sofiiskiya universitet \u2018\u2018Kliment Ohridski\u2019\u2019. Biologicheski fakultet (Annuaire de l\u2019Universit\u00e9 de Sofia \u2018\u2018Kliment Ohridski\u2019\u2019, Facult\u00e9 de Biologie)"},{"issue":"1 \u2013 Zoology","key":"5_CR73","first-page":"1","volume":"67","author":"B. Marinov","year":"1975","unstructured":"Marinov, B., 1975. [\u00dcber die systematische Stellung der Unterarten der Elritze \u2013 Phoxinus phoxinus (L.), 1758 (Pisces, Cyprinidae) von Bulgarien]. Godishnik na Sofiiskiya universitet \u2018\u2018Kliment Ohridski\u2019\u2019. Biologicheski fakultet (Annuaire de l\u2019Universit\u00e9 de Sofia \u2018\u2018Kliment Ohridski\u2019\u2019, Facult\u00e9 de Biologie) 67(1 \u2013 Zoology), 1\u201314 (in Bulgarian).","journal-title":"Biologicheski fakultet (Annuaire de l\u2019Universit\u00e9 de Sofia \u2018\u2018Kliment Ohridski\u2019\u2019, Facult\u00e9 de Biologie)"},{"key":"5_CR74","first-page":"201","volume-title":"Limnologie des bulgarischen Donauabschnitts","author":"B. Marinov","year":"1978","unstructured":"Marinov, B., 1978. Die Fischfauna im bulgarischen Donauabschnitt und ihre Bedeutung f\u00fcr die Wirtschaft. In Russev, B. & W. Naidenow (eds), Limnologie des bulgarischen Donauabschnitts. Bulgarische Akademie der Wissenschaften, Sofia: 201\u2013228."},{"key":"5_CR75","unstructured":"Marinov, B., 1979. [Pseudorasbora parva (Schlegel, 1942) (Pisces, Cyprinidae) \u2013 a new representative of the ichthyofauna of Bulgaria]. Hidrobiologiya (Hydrobiology) (Sofia) 8:75\u201378 (in Bulgarian)."},{"key":"5_CR76","unstructured":"Marinov, B., 1987. [Growth of the asp (Aspius aspius L.) from the Bulgarian sector of the Danube]. In Botev, B. (ed), Savremenni postizheniya na balgarskata zoologiya. Materiali ot chetvartata yubileina nauchna konferentsiya po zoologiya [Modern Achievements in the Bulgarian Zoology. Materials of the Fourth Jubilee Scientific Conference on Zoology]. Izdatelstvo na Balgarskata akademiya na naukite [Publishing House of the Bulgarian Academy of Sciences], Sofia: 111\u2013116 (in Bulgarian)."},{"key":"5_CR77","first-page":"359","volume":"8","author":"B. Marinov","year":"1967","unstructured":"Marinov, B. & A. Bojadschiev, 1967. [\u00dcber das Anwachsungstempo der wirtschaftlich wertvollen Fischarten im Stausee \u2018\u2018G. Dimitrov\u2019\u2019]. Izvestiya na Nauchnoizsledovatelskiya institut za ribno stopanstvo i okeanografiya \u2013 Varna (Proceedings of the Research Institute of Fisheries and Oceanography \u2013 Varna) 8:359\u2013369 (in Bulgarian).","journal-title":"Izvestiya na Nauchnoizsledovatelskiya institut za ribno stopanstvo i okeanografiya \u2013 Varna (Proceedings of the Research Institute of Fisheries and Oceanography \u2013 Varna)"},{"key":"5_CR78","first-page":"18","volume":"31","author":"B. Marinov","year":"1986","unstructured":"Marinov, B. and Dikov, C., 1986. Cottus gobio haemusi subsp. n. (Pisces, Cottidae) from Bulgaria. Acta zoologica bulgarica 31:18\u201323.","journal-title":"Acta zoologica bulgarica"},{"key":"5_CR79","first-page":"251","volume":"3","author":"K. Martino","year":"1954","unstructured":"Martino, K., 1954. [A new species for the Black Sea ichthyofauna, Spondyliosoma cantharus (L.), fam. Sparidae, Pisces]. Izvestiya na Zoologicheskiya institut (Bulletin de l\u2019Institut zoologique de l\u2019Acad\u00e9mie bulgare des sciences) 3:251\u2013255 (in Bulgarian).","journal-title":"Izvestiya na Zoologicheskiya institut (Bulletin de l\u2019Institut zoologique de l\u2019Acad\u00e9mie bulgare des sciences)"},{"key":"5_CR80","first-page":"55","volume":"19","author":"L. Michajlova","year":"1965a","unstructured":"Michajlova, L., 1965a. [Untersuchungen \u00fcber die Fischfauna des Struma-Flusses]. Izvestiya na Zoologicheskiya institut s muzei (Bulletin de l\u2019Institut de zoologie et mus\u00e9e) 19:55\u201371 (in Bulgarian).","journal-title":"Izvestiya na Zoologicheskiya institut s muzei (Bulletin de l\u2019Institut de zoologie et mus\u00e9e)"},{"key":"5_CR81","unstructured":"Michajlova, L., 1965b. [\u00dcber die Ichthyofauna Thrakiens]. In Fauna na Trakiya. Sbornik ot statii. Chast II (Die Fauna Thrakiens. Sammelwerk. Band II). Izdatelstvo na Balgarskata akademiya na naukite (Verlag der Bulgarischen Akademie der Wissenschaften), Sofia: 265\u2013289 (in Bulgarian)."},{"issue":"4","key":"5_CR82","first-page":"62","volume":"19","author":"L. Michajlova","year":"1970","unstructured":"Michajlova, L., 1970. [Ichthyofauna in the rivers of the Aegean watershed]. Priroda [Nature] (Sofia) 19(4):62\u201365 (in Bulgarian).","journal-title":"Priroda [Nature] (Sofia)("},{"key":"5_CR83","first-page":"70","volume":"8","author":"L. Michajlova","year":"1979","unstructured":"Michajlova, L. & B. Marinov, 1979. [Additional data on the species composition of the ichthyofauna of the Batak Dam]. Hidrobiologiya (Hydrobiology) (Sofia) 8:70\u201374 (in Bulgarian).","journal-title":"Hidrobiologiya (Hydrobiology) (Sofia)"},{"issue":"1 \u2013 Biology","key":"5_CR84","first-page":"57","volume":"53","author":"M. Mihailova-Neikova","year":"1961","unstructured":"Mihailova-Neikova, M., 1961. [Hydrobiological research of the Mandra Lake with regard to its importance as a fishing ground]. Godishnik na Sofiiskiya universitet. Biologo-geologo-geografski fakultet (Annuaire de l\u2019Universit\u00e9 de Sofia, Facult\u00e9 de Biologie, G\u00e9ologie et G\u00e9ographie) 53(1 \u2013 Biology), 57\u2013122 (in Bulgarian).","journal-title":"Godishnik na Sofiiskiya universitet. Biologo-geologo-geografski fakultet (Annuaire de l\u2019Universit\u00e9 de Sofia, Facult\u00e9 de Biologie, G\u00e9ologie et G\u00e9ographie)"},{"key":"5_CR85","first-page":"1","volume":"4","author":"S. Mikhov","year":"2000a","unstructured":"Mikhov, S. 2000a. [New data about fishes in the Lake Mandra]. Burgas Wetlands Publications Series. Bulgarian-Swiss Biodiversity Conservation Program (Burgas) 4:1\u20136 (in Bulgarian).","journal-title":"Bulgarian-Swiss Biodiversity Conservation Program (Burgas)"},{"key":"5_CR86","first-page":"1","volume":"5","author":"S. Mikhov","year":"2000b","unstructured":"Mikhov, S., 2000b. [Lake Atanassovsko \u2013 high conservation status of the ichthyofauna]. Burgas Wetlands Publications Series. Bulgarian-Swiss Biodiversity Conservation Program (Burgas) 5:1\u20135 (in Bulgarian).","journal-title":"Bulgarian-Swiss Biodiversity Conservation Program (Burgas)"},{"key":"5_CR87","volume-title":"Balgarski ribarski sayuz","author":"Th. Moroff","year":"1931","unstructured":"Moroff, Th., 1931. Sladkovodnite ribi v Balgariya [The Freshwater Fishes of Bulgaria]. Balgarski ribarski sayuz [Union of Fishermen of Bulgaria], Sofia (in Bulgarian)."},{"issue":"1","key":"5_CR88","first-page":"53","volume":"1","author":"W. Naidenow","year":"1964","unstructured":"Naidenow, W., 1964. [The influence of zooplankton on the quantitative and qualitative development of the ichthyofauna in Batak Reservoir]. Zhivotnovadni Nauki [Animal Husbandry] 1(1):53\u201362 (in Bulgarian).","journal-title":"Zhivotnovadni Nauki [Animal Husbandry]"},{"key":"5_CR89","first-page":"21","volume":"5\/6","author":"V. Naidenov","year":"1974","unstructured":"Naidenov, V. & B. Marinov, 1974 [Condition and perspective of the fishery from the Bulgarian section of the Danube]. Ribno stopanstvo [Fisheries] 5\/6:21\u201322 (in Bulgarian).","journal-title":"Ribno stopanstvo [Fisheries]"},{"key":"5_CR90","first-page":"45","volume":"33","author":"S. Naumova","year":"1988","unstructured":"Naumova, S. & M. Zivkov, 1988. [Mutual influence of the intensive trout rearing in cage and the hydrochemical and hydromicrobiological properties of the water in the \u2018\u2018Dospat\u2019\u2019 reservoir]. Hidrobiologiya (Hydrobiology) (Sofia) 33:45\u201358 (in Bulgarian).","journal-title":"Hidrobiologiya (Hydrobiology) (Sofia)"},{"issue":"6","key":"5_CR91","first-page":"88","volume":"2","author":"A. Nechaev","year":"1932","unstructured":"Nechaev, A., 1932. [The fish mortality in the Vaya-Kyoi Swamp in the autumn 1931]. Ribarski pregled [Fishing Review] 2(6):88\u201389 (in Bulgarian).","journal-title":"Ribarski pregled [Fishing Review]"},{"key":"5_CR92","unstructured":"Nelson, J., 1994. Fishes of the World. Wiley-Interscience, New Work."},{"key":"5_CR93","first-page":"227","volume":"1","author":"E. Oundjian","year":"1964","unstructured":"Oundjian, E., 1964. [\u00dcber einen Fund von Neunaugen aus der Donau]. Izvestiya na Narodniya muzei \u2013 Ruse (Bulletin de Mus\u00e9e National \u00e1 Rousse)1:227\u2013232 (in Bulgarian).","journal-title":"Izvestiya na Narodniya muzei \u2013 Ruse (Bulletin de Mus\u00e9e National \u00e1 Rousse)"},{"issue":"2","key":"5_CR94","first-page":"4","volume":"11","author":"G. Paspaleff","year":"1941","unstructured":"Paspaleff, G., 1941. [The mortality of fishes in the Varna Lake]. Ribarski pregled [Fishing Review] 11(2):4\u20135 (in Bulgarian).","journal-title":"Ribarski pregled [Fishing Review]"},{"key":"5_CR95","volume-title":"Pitanie, raspredelenie i migratsiya molodi ryb iz vodokhranilishcha \u2018\u2018Alexandar Stamboliiski\u2019\u2019 [Feeding, Distribution and Migration of Young Fish in Alexandar Stamboliiski Reservoir]","author":"D.S. Pavlov","year":"1988","unstructured":"Pavlov, D.S, V.N. Mikheev, M.V. Vassilev & L.Z. Pehlivanov, 1988. Pitanie, raspredelenie i migratsiya molodi ryb iz vodokhranilishcha \u2018\u2018Alexandar Stamboliiski\u2019\u2019 [Feeding, Distribution and Migration of Young Fish in Alexandar Stamboliiski Reservoir]. Nauka [Science], Moscow (in Russian)."},{"issue":"16","key":"5_CR96","first-page":"127","volume":"1","author":"I. Pechev","year":"1965","unstructured":"Pechev, I., 1965. [Contribution \u00e1 l\u2019ichthyofaune de la rivi\u00e9re Batova]. Izvestiya na Narodniya muzei \u2013 Varna (Bulletin de Mus\u00e9e national de Varna) 1(16):127\u2013134 (in Bulgarian).","journal-title":"Izvestiya na Narodniya muzei \u2013 Varna (Bulletin de Mus\u00e9e national de Varna)"},{"issue":"17","key":"5_CR97","first-page":"179","volume":"2","author":"I. Pechev","year":"1966","unstructured":"Pechev, I., 1966. [Revue de l\u2019ichthyofaune de la rivi\u00e9re d\u2019Elechnitza]. Izvestiya na Narodniya muzei \u2013 Varna (Bulletin de Mus\u00e9e national de Varna) 2(17):179\u2013191 (in Bulgarian).","journal-title":"Izvestiya na Narodniya muzei \u2013 Varna (Bulletin de Mus\u00e9e national de Varna)"},{"issue":"20","key":"5_CR98","first-page":"213","volume":"5","author":"I. Pechev","year":"1969","unstructured":"Pechev, I., 1969. [Au sujet de l\u2019ichthyofaune de quelques rivi\u00e9res bulgares se jetant dans la Mer Noire]. Izvestiya na Narodniya muzei \u2013 Varna (Bulletin de Mus\u00e9e national de Varna) 5(20):213\u2013220 (in Bulgarian).","journal-title":"Izvestiya na Narodniya muzei \u2013 Varna (Bulletin de Mus\u00e9e national de Varna)"},{"issue":"21","key":"5_CR99","first-page":"143","volume":"6","author":"I. Pechev","year":"1970","unstructured":"Pechev, I., 1970. [La faune ichthyologique de certaines rivi\u00e9res de Bulgarie de l\u2019Est]. Izvestiya na Narodniya muzei \u2013 Varna (Bulletin de Mus\u00e9e national de Varna) 6(21):143\u2013155 (in Bulgarian).","journal-title":"Izvestiya na Narodniya muzei \u2013 Varna (Bulletin de Mus\u00e9e national de Varna)"},{"key":"5_CR100","first-page":"107","volume-title":"Biodiversity of Shabla Lake System. Prof. Marin Drinov","author":"L. Pehlivanov","year":"1998","unstructured":"Pehlivanov, L., 1998. On the role of zooplankton in food of some numerous fish species in lake system Shabla\u2013Ezerets (Northeastern Bulgaria). In Golemansky, V. & W. Naidenow (eds), Biodiversity of Shabla Lake System. Prof. Marin Drinov Academic Publishing House, Sofia: 107\u2013113."},{"key":"5_CR101","first-page":"317","volume":"33","author":"L. Pehlivanov","year":"2000a","unstructured":"Pehlivanov, L., 2000a. Ichthyofauna in the Srebarna Lake, the Danube Basin, state and significance of the management and conservation strategies of this wetland. International Association for Danube Research 33:317\u2013322.","journal-title":"International Association for Danube Research"},{"issue":"3","key":"5_CR102","first-page":"45","volume":"52","author":"L. Pehlivanov","year":"2000b","unstructured":"Pehlivanov, L., 2000b. Ichthyofauna of the East Rhodopes (South Bulgaria): composition and distribution. Acta zoologica bulgarica 52(3):45\u201353.","journal-title":"Acta zoologica bulgarica"},{"issue":"2","key":"5_CR103","first-page":"81","volume":"55","author":"L. Pehlivanov","year":"2003","unstructured":"Pehlivanov, L. & M. Vassilev. 2003. Feeding of age-1 perch (Perca fluviatilis) with a view to the diurnal dynamics of its distribution in the Alexander Stamboliiski Reservoir, Bulgaria. Acta zoologica bulgarica 55(2):81\u201390.","journal-title":"Acta zoologica bulgarica"},{"key":"5_CR104","unstructured":"Prodanov, K., K. Dencheva & L. Ivanov, 1998. Fish of the Bulgarian coastal waters. In Meine, C. (ed), Bulgaria\u2019s Biological Diversity: Conservation Status and Needs Assessment. Volumes I and II. Pensoft, Sofia & Moscow: 375\u2013393."},{"key":"5_CR105","first-page":"75","volume-title":"Biodiversity and Evolution of Glacial Water Ecosystems in the Rila Mountains","author":"G. Raikova-Petrova","year":"2000","unstructured":"Raikova-Petrova, G., 2000. The ichthyofauna in glacial waters of the Rila Mountains. In Golemansky, V. & W. Naidenow (eds), Biodiversity and Evolution of Glacial Water Ecosystems in the Rila Mountains. Institute of Zoology, Sofia: 75\u201378."},{"key":"5_CR106","first-page":"81","volume":"53","author":"G. Raikova-Petrova","year":"2001","unstructured":"Raikova-Petrova, G., 2001. Age and growth rate of perch (Perca fluviatilis L.) in Ovcharitsa Reservoir (Bulgaria). Arhiv biolo\u0161kih nauka (Belgrade) 53(3\u20134):81\u201385.","journal-title":"Arhiv biolo\u0161kih nauka (Belgrade)"},{"key":"5_CR107","first-page":"413","volume-title":"Dokladi. Deseti yubileen mezhdunaroden simpozium \u2018\u2018Ekologiya","author":"G. Raikova-Petrova","year":"2001","unstructured":"Raikova-Petrova, G., Ts. Belomatcheva & M. Zivkov, 2001. [First maturity, sex ratio and fecundity of ruffe (Gymnocephalus cernuus L.) in Ovcharitsa Cooling-Reservoir]. In Dokladi. Deseti yubileen mezhdunaroden simpozium \u2018\u2018Ekologiya 2001\u2019\u2019, Burgas (Reports. 10th Jubilee International Symposium \u2018\u2018Ecology 2001\u2019\u2019, Bourgas). Burgas: 413\u2013420 (in Bulgarian)."},{"key":"5_CR108","first-page":"45","volume":"38","author":"G. Zaikova-Petrova","year":"1993a","unstructured":"Raikova-Petrova, G., L. Pehlivanov & M. Zivkov, 1993a. [The food of pike-perch (Stizostedion lucioperca (L.)) in Batak Reservoir]. Hidrobiologiya (Hydrobiology) (Sofia) 38:45\u201356 (in Bulgarian).","journal-title":"Hidrobiologiya (Hydrobiology) (Sofia)"},{"key":"5_CR109","first-page":"57","volume":"38","author":"G. Raikova-Petrova","year":"1993","unstructured":"Raikova-Petrova, G., L. Pehlivanov & M. Zivkov, 1993b. [The food of pike-perch (Stizostedion lucioperca (L.)) in Ovcaritsa Cooling-Reservoir]. Hidrobiologiya (Hydrobiology) (Sofia) 38:57\u201366 (in Bulgarian).","journal-title":"Hidrobiologiya (Hydrobiology) (Sofia)"},{"key":"5_CR110","first-page":"31","volume":"52","author":"G. Petrova","year":"1988","unstructured":"Petrova, G. & M. Zivkov, 1988. Regularities in the growth rate of pikeperch Stizostedion lucioperca (L.) in the Batak Dam, Bulgaria. V\u011bstn\u00eck \u010ceskoslovensk\u00e9 spole\u010dnosti zoologick\u00e9 52:31\u201343.","journal-title":"V\u011bstn\u00eck \u010ceskoslovensk\u00e9 spole\u010dnosti zoologick\u00e9"},{"key":"5_CR111","first-page":"58","volume":"32","author":"G. Raikova-Petrova","year":"1988","unstructured":"Raikova-Petrova, G. & M. Zivkov, 1988. [Introduction and biological significance of the pikeperch (Stizostedion lucioperca L.) in the \u2018\u2018Batak\u2019\u2019 reservoir]. Hidrobiologiya (Hydrobiology) (Sofia) 32:58\u201367 (in Bulgarian).","journal-title":"Hidrobiologiya (Hydrobiology) (Sofia)"},{"key":"5_CR112","first-page":"67","volume":"38","author":"G. Raikova-Petrova","year":"1993","unstructured":"Raikova-Petrova, G. & M. Zivkov, 1993. [Age and growth rate of pikeperch (Stizostedion lucioperca (L.)) in Ovcharitsa Cooling-Reservoir]. Hidrobiologiya (Hydrobiology) (Sofia) 38:67\u201381 (in Bulgarian).","journal-title":"Hidrobiologiya (Hydrobiology) (Sofia)"},{"key":"5_CR113","unstructured":"Raikova-Petrova, G. & M. Zivkov, 1996. Age and growth of minnow, Phoxinus phoxinus (L.), in the Beli Iskur Reservoir and Grunchar Lake of Rila National Park (Bulgaria). In National Parks and their Role in Biodiversity Protection on the Balkan Peninsula, Ohrid: 127\u2013129."},{"key":"5_CR114","doi-asserted-by":"publisher","first-page":"31","DOI":"10.1111\/j.1439-0426.1998.tb00610.x","volume":"14","author":"G. Raikova-Petrova","year":"1998","unstructured":"Raikova-Petrova, G. & M. Zivkov, 1998.t Maturity, spawning, and sex ratio of pikeperch, Stizostedion lucioperca (L.) in two Bulgarian reservoirs as compared to other European habitats. Journal of Applied Ichthyology 14:31\u201335.","journal-title":"Journal of Applied Ichthyology"},{"key":"5_CR115","first-page":"295","volume-title":"Dokladi. Deveti mezhdunaroden simpozium \u2018\u2018Ekologiya 2000\u2019\u2019, 8\u201310 yuni, Burgas, Balgariya","author":"G. Raikova-Petrova","year":"2000","unstructured":"Raikova-Petrova, G. & M. Zivkov, 2000. [Age and growth rate of perch (Perca fluviatilis L.) in Batak Reservoir (Bulgaria)]. In Dokladi. Deveti mezhdunaroden simpozium \u2018\u2018Ekologiya 2000\u2019\u2019, 8\u201310 yuni, Burgas, Balgariya (Reports. 9th International Symposium \u2018\u2018Ecology 2000\u2019\u2019, 8\u201310 June, Bourgas, Bulgaria). Burgas: 295\u2013300 (in Bulgarian)."},{"key":"5_CR116","first-page":"178","volume":"4","author":"G. Raikova-Petrova","year":"1996","unstructured":"Raikova-Petrova, G., M. Zivkov, M. Karapetkova & E. Nikolova, 1996. Toxic elements in zoo-monitory species of fish and amphibians from Rila mountain. Observatoire de montagne de Moussala, OM2, 4:178\u2013183.","journal-title":"Observatoire de montagne de Moussala, OM2"},{"key":"5_CR117","first-page":"211","volume":"7","author":"G. Raikova-Petrova","year":"1998","unstructured":"Raikova-Petrova, G., M. Zivkov, M. Karapetkova, T. Trichkova, E. Nikolova & A. Artinjan, 1998. Content of toxic elements in fish and amphibians from the Rila mountain in the period 1994-1996. Observatoire de montagne de Moussala, OM2, 7:211\u2013214.","journal-title":"Observatoire de montagne de Moussala, OM2"},{"key":"5_CR118","first-page":"133","volume":"6","author":"G. Raikova-Petrova","year":"1997","unstructured":"Raikova-Petrova, G., M. Zivkov, E. Nikolova & A. Artinjan, 1997. Toxic elements in zoomonitory species of fish and amphibians from Rila Mountain in 1996. Observatoire de montagne de Moussala, OM2, 6:133\u2013136.","journal-title":"Observatoire de montagne de Moussala, OM2"},{"issue":"1 \u2013 Biology","key":"5_CR119","first-page":"161","volume":"51","author":"G. Saschev","year":"1959","unstructured":"Saschev, G. & A. Angelov, 1959. [Untersuchungen \u00fcber den Burgas-See (Waja) in Beziehung zur Verbesserung seiner fischwirtschaftlichen Ausbeutung]. Godishnik na Sofiiskiya universitet. Biologo-geologo-geografski fakultet (Annuaire de l\u2019Universit\u00e9 de Sofia, Facult\u00e9 de Biologie, G\u00e9ologie et G\u00e9ographie) 51(1 \u2013 Biology):161\u2013210 (in Bulgarian).","journal-title":"Godishnik na Sofiiskiya universitet. Biologo-geologo-geografski fakultet (Annuaire de l\u2019Universit\u00e9 de Sofia, Facult\u00e9 de Biologie, G\u00e9ologie et G\u00e9ographie)"},{"issue":"25","key":"5_CR120","first-page":"374","volume":"10","author":"Y. Sivkov","year":"1974","unstructured":"Sivkov, Y., 1974. [Ichthyofauna des Flusses Devnja]. Izvestiya na Narodniya muzei \u2013 Varna (Bulletin de Mus\u00e9e National de Varna) 10(25):374\u2013377 (in Bulgarian).","journal-title":"Izvestiya na Narodniya muzei \u2013 Varna (Bulletin de Mus\u00e9e National de Varna)"},{"issue":"30","key":"5_CR121","first-page":"149","volume":"15","author":"Y. Sivkov","year":"1979","unstructured":"Sivkov, Y., 1979. [Morphological characteristics of the common perch Perca fluviatilis L., from the Danube and the Shabla Lake]. Izvestiya na Narodniya muzei \u2013 Varna (Bulletin de Mus\u00e9e National de Varna) 15(30):149\u2013157 (in Bulgarian).","journal-title":"Izvestiya na Narodniya muzei \u2013 Varna (Bulletin de Mus\u00e9e National de Varna)"},{"key":"5_CR122","first-page":"10","volume":"27","author":"Y. Sivkov","year":"1985","unstructured":"Sivkov, Y., 1985. [Morphological characteristics of Gymnocephalus baloni Holcik et Hensel, 1974 (Pisces, Percidae), a new species to the Bulgarian ichthyofauna]. Acta zoologica bulgarica 27:10\u201320 (in Russian).","journal-title":"Acta zoologica bulgarica"},{"issue":"38","key":"5_CR123","first-page":"198","volume":"23","author":"Y. Sivkov","year":"1987a","unstructured":"Sivkov, Y., 1987a. [Morphometric characteristic of Zingel streber Siebald, 1863 (Pisces, Percidae) from the Bulgarian section of the Danube]. Izvestiya na Narodniya muzei \u2013 Varna (Bulletin de Mus\u00e9e National de Varna) 23(38):198\u2013204 (in Bulgarian).","journal-title":"Izvestiya na Narodniya muzei \u2013 Varna (Bulletin de Mus\u00e9e National de Varna)"},{"issue":"38","key":"5_CR124","first-page":"204","volume":"23","author":"Y. Sivkov","year":"1987b","unstructured":"Sivkov, Y., 1987b. [Morphometric characteristic of Stizostedion volgense (Gmelin, 1788) (Pisces, Percidae) from the Bulgarian section of the Danube]. Izvestiya na Narodniya muzei \u2013 Varna (Bulletin de Mus\u00e9e National de Varna) 23(38):204\u2013211 (in Bulgarian).","journal-title":"Izvestiya na Narodniya muzei \u2013 Varna (Bulletin de Mus\u00e9e National de Varna)"},{"issue":"39","key":"5_CR125","first-page":"174","volume":"24","author":"Y. Sivkov","year":"1988a","unstructured":"Sivkov, Y., 1988a. [Morphological characteristic of the pikeperch Stizostedion lucioperca (L.) from the Danube River and the Shabla Lake]. Izvestiya na Narodniya muzei \u2013 Varna (Bulletin de Mus\u00e9e National de Varna) 24(39):174\u2013179 (in Bulgarian).","journal-title":"Izvestiya na Narodniya muzei \u2013 Varna (Bulletin de Mus\u00e9e National de Varna)"},{"issue":"39","key":"5_CR126","first-page":"180","volume":"24","author":"Y. Sivkov","year":"1988b","unstructured":"Sivkov, Y., 1988b. [Morphological characteristics of the ruff Gymnocephalus cernuus (Linnaeus, 1758) (Pisces, Percidae) from the Bulgarian section of the Danube River]. Izvestiya na Narodniya muzei \u2013 Varna (Bulletin de Mus\u00e9e National de Varna) 24(39):180\u2013185 (in Bulgarian).","journal-title":"Izvestiya na Narodniya muzei \u2013 Varna (Bulletin de Mus\u00e9e National de Varna)"},{"key":"5_CR127","first-page":"11","volume":"38","author":"Y. Sivkov","year":"1989a","unstructured":"Sivkov, Y., 1989a. [Morphological characterization of the gudgeon (Gobio albipinnatus Lukasch, 1933) (Pisces, Cyprinidae) from the Bulgarian section of the Danube River]. Acta zoologica bulgarica 38:11\u201315 (in Bulgarian).","journal-title":"Acta zoologica bulgarica"},{"key":"5_CR128","first-page":"16","volume":"38","author":"Y. Sivkov","year":"1989b","unstructured":"Sivkov, Y., 1989b. [Morphological characterization of the Cobitis elongata Heckel et Kner, 1858 (Cobitidae) from Bulgaria]. Acta zoologica bulgarica 38:16\u201323 (in Bulgarian).","journal-title":"Acta zoologica bulgarica"},{"key":"5_CR129","first-page":"34","volume":"42","author":"Y. Sivkov","year":"1991a","unstructured":"Sivkov, Y., 1991a. [Morphological characteristic of the Danubian loach Sabanejewia bulgarica (Drensky, 1928) (Pisces, Cobitidae). Acta zoologica bulgarica 42:34\u201343 (in Bulgarian).","journal-title":"Acta zoologica bulgarica"},{"key":"5_CR130","first-page":"44","volume":"42","author":"J. Sivkov","year":"1991b","unstructured":"Sivkov, J., 1991b. [Morphological characteristics of the Balkan barbel Barbus peloponnesius Valenciennes, 1842 from Bulgaria]. Acta zoologica bulgarica 42:44\u201352 (in Bulgarian).","journal-title":"Acta zoologica bulgarica"},{"key":"5_CR131","first-page":"849","volume-title":"Biodiversity of Bulgaria. 2. Biodiversity of Eastern Rhodopes (Bulgaria and Greece)","author":"T. Stefanov","year":"2004","unstructured":"Stefanov, T. & T. Trichkova, 2004. Fish species diversity in the Eastern Rhodopes (Bulgaria). In Beron, P. & A. Popov (eds), Biodiversity of Bulgaria. 2. Biodiversity of Eastern Rhodopes (Bulgaria and Greece). Pensoft & National Museum of Natural History, Sofia: 849\u2013861."},{"key":"5_CR132","first-page":"227","volume-title":"Sbornik. Nauchni dokladi. Mezhdunarodna nauchna konferentsiya \u2018\u201850 godini Lesotehnicheski universitet\u2019\u2019 (Proceedings. Scientific Papers. International Scientific Conference \u2018\u201850 Years University of Forestry\u2019\u2019). Lesotehnicheski universitet","author":"T. Stefanov","year":"2003","unstructured":"Stefanov, T., T. Trichkova & M. Zivkov, 2003. Changes in the ichthyofauna of the Rhodope Mountains. In Kolarov, D. (ed), Sbornik. Nauchni dokladi. Mezhdunarodna nauchna konferentsiya \u2018\u201850 godini Lesotehnicheski universitet\u2019\u2019 (Proceedings. Scientific Papers. International Scientific Conference \u2018\u201850 Years University of Forestry\u2019\u2019). Lesotehnicheski universitet (University of Forestry), Sofia: 227\u2013231."},{"issue":"4\/5","key":"5_CR133","first-page":"15","volume":"15","author":"S. Stoyanov","year":"1946","unstructured":"Stoyanov, S., 1946. [On the Carassius carassius from the lake of Gebedje]. Ribarski pregled [Fishing Review] 15(4\/5):15\u201316 (in Bulgarian).","journal-title":"Ribarski pregled [Fishing Review]"},{"key":"5_CR134","volume-title":"Darzhavno izdatelstvo","author":"S. Stoyanov","year":"1963","unstructured":"Stoyanov, S., J. Georgiev, L. Ivanov, D. Hristov, P. Kolarov, K. Alexandrova & M. Karapetkova, 1963. Ribite v Cherno more (balgarskoto kraibrezhie) [Fishes of the Black Sea (Bulgarian Coast)]. Darzhavno izdatelstvo [State Publishing House], Varna (in Bulgarian)."},{"key":"5_CR135","first-page":"629","volume":"8","author":"E. Uzunova","year":"2002","unstructured":"Uzunova, E., K. Yorov, K. & B. Velkov, 2002. Growth and first maturation of Salmo salar Sebago introduced in fish farm \u2018\u2018Nishava\u2019\u2019. Bulgarian Journal of Agricultural Science 8:629\u2013633.","journal-title":"Bulgarian Journal of Agricultural Science"},{"issue":"3","key":"5_CR136","first-page":"39","volume":"5","author":"A. Valkanov","year":"1935a","unstructured":"Valkanov, A., 1935a. [The Varna Lake]. Ribarski pregled [Fishing Review] 5(3):39\u201341 (in Bulgarian).","journal-title":"Ribarski pregled [Fishing Review]"},{"issue":"6","key":"5_CR137","first-page":"84","volume":"5","author":"A. Valkanov","year":"1935b","unstructured":"Valkanov, A., 1935b. [The Pomorie Lake]. Ribarski pregled [Fishing Review] 5(6):84\u201386 (in Bulgarian).","journal-title":"Ribarski pregled [Fishing Review]"},{"issue":"5","key":"5_CR138","first-page":"69","volume":"6","author":"A. Valkanov","year":"1936","unstructured":"Valkanov, A., 1936. [The Burgas Lake]. Ribarski pregled [Fishing Review] 6(5):69\u201371 (in Bulgarian).","journal-title":"Ribarski pregled [Fishing Review]"},{"issue":"4","key":"5_CR139","first-page":"5","volume":"11","author":"A. Valkanov","year":"1941","unstructured":"Valkanov, A., 1941. [Where do the fishes of the Varna Lake spend the winter?] Ribarski pregled [Fishing Review] 11(4):5\u20137 (in Bulgarian).","journal-title":"Ribarski pregled [Fishing Review]"},{"key":"5_CR140","first-page":"101","volume-title":"Biodiversity of Shabla Lake System","author":"M. Vassilev","year":"1998","unstructured":"Vassilev, M., 1998. Alteration of the ichthyofauna in the Shabla and Ezerets lakes. In Golemansky, V. & W. Naidenow (eds), Biodiversity of Shabla Lake System. Prof. Marin Drinov Academic Publishing House, Sofia: 101\u2013106."},{"key":"5_CR141","doi-asserted-by":"crossref","unstructured":"Whitehead, P.J.P., M.-L. Bauchot, J.-C. Hureau, J. Nielsen & E. Tortonese, E., 1986. Fishes of the North-eastern Atlantic and the Mediterranean. Volume 3. UNESCO, Paris.","DOI":"10.2307\/1444931"},{"key":"5_CR142","first-page":"203","volume":"40","author":"M. Zhivkov","year":"1974","unstructured":"Zhivkov, M., 1974. [Dynamics of the numerical strength of fish populations in the Batak Dam. I. Age structure and increase in the population of Leuciscus cephalus L.]. Izvestiya na Zoologicheskiya institut s muzei (Bulletin de l\u2019Institut de zoologie et mus\u00e9e) 40:203\u2013216 (in Bulgarian).","journal-title":"Izvestiya na Zoologicheskiya institut s muzei (Bulletin de l\u2019Institut de zoologie et mus\u00e9e)"},{"key":"5_CR143","first-page":"32","volume":"2","author":"M. Zhivkov","year":"1975","unstructured":"Zhivkov, M., 1975. [Dynamics of the numerical strength of fish populations in the Batak Dam Lake. II. Age composition and growth of the carp population (Cyprinus carpio L.)]. Hidrobiologiya (Hydrobiology) (Sofia) 2:32\u201345 (in Bulgarian).","journal-title":"Hidrobiologiya (Hydrobiology) (Sofia)"},{"key":"5_CR144","first-page":"36","volume":"4","author":"M. Zhivkov","year":"1976","unstructured":"Zhivkov, M., 1976. [Dynamics of the numerical strength of fish populations in the Batak Dam. IV. Age composition and growth of the incidental species]. Hidrobiologiya (Hydrobiology) (Sofia) 4:36\u201351 (in Bulgarian).","journal-title":"Hidrobiologiya (Hydrobiology) (Sofia)"},{"key":"5_CR145","first-page":"49","volume":"12","author":"M. Zhivkov","year":"1980","unstructured":"Zhivkov, M., 1980. [Numerical dynamics of fish population in the Batak Dam. V. Rate of sexual maturation and sex ratio]. Hidrobiologiya (Hydrobiology) (Sofia) 12:49\u201362 (in Bulgarian).","journal-title":"Hidrobiologiya (Hydrobiology) (Sofia)"},{"key":"5_CR146","first-page":"15","volume":"30","author":"M. Zivkov","year":"1987","unstructured":"Zivkov, M., 1987. [Ichthyofauna and fish-farming in the \u2018\u2018Dospat\u2019\u2019 Reservoir]. Hidrobiologiya (Hydrobiology) (Sofia) 30:15\u201322 (in Bulgarian).","journal-title":"Hidrobiologiya (Hydrobiology) (Sofia)"},{"issue":"1","key":"5_CR147","first-page":"7","volume":"25","author":"M. Zivkov","year":"1993","unstructured":"Zivkov, M., 1993. Comparative analysis of the age composition, growth rate and condition of carp (Cyprinus carpio L.) in three Bulgarian reservoirs. Ichthyologia (Belgrade) 25(1):7\u201318.","journal-title":"Ichthyologia (Belgrade)"},{"issue":"1","key":"5_CR148","first-page":"93","volume":"55","author":"M. Zivkov","year":"2003","unstructured":"Zivkov, M., Ts. Belomacheva & T. Trichkova, 2003. Growth rate and condition of rudd, Scardinius erythrophthalmus (L.), in two Bulgarian reservoirs as compared to other European water bodies. Acta zoologica bulgarica 55(1):93\u2013105.","journal-title":"Acta zoologica bulgarica"},{"key":"5_CR149","first-page":"128","volume-title":"Balgarski sayuz za zashtita na Rodopite","author":"M. Zivkov","year":"2001","unstructured":"Zivkov, M. & D. Dobrev, 2001. Ribite, zemnovodnite i vlechugite na Rodopite [Fishes, Amphibians and Reptiles of the Rhodope Mountains]. Balgarski sayuz za zashtita na Rodopite [Bulgarian Union for the Protection of Rhodopes], Sofia, 128 pp. (in Bulgarian)."},{"key":"5_CR150","first-page":"39","volume":"10","author":"M. Zivkov","year":"1979","unstructured":"Zivkov, M. & G. Grupcheva, 1979. [On the presence and relative numerical strength of the redeye Scardinius erythrophthalmus L. in the Batak Dam]. Hidrobiologiya (Hydrobiology) (Sofia) 10:39\u201342 (in Bulgarian).","journal-title":"Hidrobiologiya (Hydrobiology) (Sofia)"},{"key":"5_CR151","first-page":"23","volume":"30","author":"M. Zivkov","year":"1987","unstructured":"Zivkov, M. & G. Grupcheva, 1987. [Specificities of the hydrochemical state, formation of the ichthyofauna and the fish-farming in the reservoir-cooler \u2018\u2018Ovcharitsa\u2019\u2019]. Hidrobiologiya (Hydrobiology) (Sofia) 30:23\u201336 (in Bulgarian).","journal-title":"Hidrobiologiya (Hydrobiology) (Sofia)"},{"key":"5_CR152","first-page":"141","volume":"48","author":"M. Zivkov","year":"1984","unstructured":"Zivkov, M. & G. Petrova, 1984. An attempt to study the effect of the water volume on the fish growth in the Batak Reservoir, Bulgaria. V\u011bstn\u00eck \u010ceskoslovensk\u00e9 spole\u010dnosti zoologick\u00e9 48:141\u2013159.","journal-title":"V\u011bstn\u00eck \u010ceskoslovensk\u00e9 spole\u010dnosti zoologick\u00e9"},{"key":"5_CR153","first-page":"127","volume":"59","author":"M. Zivkov","year":"1995","unstructured":"Zivkov, M. & G. Petrova, 1995. Fecundity of pikeperch (Stizostedion lucioperca) in two Bulgarian reservoirs as compared to other European habitats. Acta Societatis Zoologicae Bohemicae 59:127\u2013136.","journal-title":"Acta Societatis Zoologicae Bohemicae"},{"key":"5_CR154","first-page":"10","volume":"18","author":"M. Zivkov","year":"1983","unstructured":"Zivkov, M. & G. Raikova-Petrova, 1983. [Numerical dynamics of fish populations in the Batak Dam. VI. Fecundity]. Hidrobiologiya (Hydrobiology) (Sofia) 18:10\u201322 (in Bulgarian).","journal-title":"Hidrobiologiya (Hydrobiology) (Sofia)"},{"key":"5_CR155","first-page":"203","volume":"40","author":"M. Zivkov","year":"1996a","unstructured":"Zivkov, M. & G. Raikova-Petrova, 1996a. Age composition, growth rate and mortality of the bream (Abramis brama) in the cooling-reservoir Ovcharitsa (Bulgaria). Acta Universitatis Carolinae, Biologica 40:203\u2013212.","journal-title":"Acta Universitatis Carolinae, Biologica"},{"key":"5_CR156","first-page":"53","volume":"10","author":"M. Zivkov","year":"1996b","unstructured":"Zivkov, M. & G. Raikova-Petrova, 1996b. Maturity, sex ratio and spawning of bream, Abramis brama (L.) in the cooling-reservoir Ovcharitsa (Bulgaria). Acta Universitatis Carolinae, Environmentalica 10:53\u201361.","journal-title":"Environmentalica"},{"issue":"1","key":"5_CR157","first-page":"47","volume":"53","author":"M. Zivkov","year":"2001","unstructured":"Zivkov, M. & G. Raikova-Petrova, 2001. Comparative analysis of age composition, growth rate and condition of roach, Rutilus rutilus (L.), in three Bulgarian reservoirs. Acta zoologica bulgarica 53(1):47\u201360.","journal-title":"Acta zoologica bulgarica"},{"key":"5_CR158","first-page":"107","volume-title":"Dokladi. Peti mezhdunaroden simpozium \u2018\u2018Ekologiya \u201896\u2019\u2019, 4\u20136 septemvri 1996, Burgas","author":"M. Zivkov","year":"1996","unstructured":"Zivkov, M., G. Raikova-Petrova & T. Trichkova, 1996. [Effect of thermally stressed waters on the reproductive biology of bream Abramis brama (L.) in the cooling-reservoir Ovcharitsa]. In Dokladi. Peti mezhdunaroden simpozium \u2018\u2018Ekologiya \u201896\u2019\u2019, 4\u20136 septemvri 1996, Burgas (Reports. 5th International Symposium \u2018\u2018Ecology \u201896\u2019\u2019, 4\u20136 September, 1996, Bourgas). Burgas, pp. 107\u2013110 (in Bulgarian)."},{"key":"5_CR159","first-page":"20","volume":"3","author":"M. Zhivkov","year":"1976","unstructured":"Zhivkov, M. & L. Stoyanova, 1976. [Dynamics of the numerical strength of fish populations in the Batak Dam. III. Age composition and growth of goldfish (Carassius auratus gibellio (Bloch.)) population]. Hidrobiologiya (Hydrobiology) (Sofia) 3:20\u201330 (in Bulgarian).","journal-title":"Hidrobiologiya (Hydrobiology) (Sofia)"},{"key":"5_CR160","first-page":"330","volume":"4\/5","author":"L. Zvetkov","year":"1955","unstructured":"Zvetkov, L., 1955. [Untersuchungen \u00fcber das Futter der Fische im Beloslavsko-See]. Izvestiya na Zoologicheskiya institut (Bulletin de l\u2019Institut zoologique de l\u2019Acad\u00e9mie des sciences de Bulgarie) 4\/5:330\u2013352 (in Bulgarian).","journal-title":"Izvestiya na Zoologicheskiya institut (Bulletin de l\u2019Institut zoologique de l\u2019Acad\u00e9mie des sciences de Bulgarie)"}],"container-title":["Monographiae Biologicae","Biogeography and Ecology of Bulgaria"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/link.springer.com\/content\/pdf\/10.1007\/978-1-4020-5781-6_5.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2021,4,29]],"date-time":"2021-04-29T04:41:26Z","timestamp":1619671286000},"score":1,"resource":{"primary":{"URL":"http:\/\/link.springer.com\/10.1007\/978-1-4020-5781-6_5"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[null]]},"ISBN":["9781402044175"],"references-count":160,"URL":"https:\/\/doi.org\/10.1007\/978-1-4020-5781-6_5","relation":{},"subject":[]}}