{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,25]],"date-time":"2026-06-25T19:59:13Z","timestamp":1782417553975,"version":"3.54.5"},"reference-count":9,"publisher":"STEF92 Technology","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2022,11,15]]},"abstract":"<jats:p>For the period 2011-2021, 231 fish species from 18 families were established in protected area BG0000271 \ufffdMandra-Poda\ufffd, 345 fish species from 7 families in protected area BG0001502 \ufffdOtmanli\ufffd and 169 species from 11 families in a protected area BG0000242 \ufffdChengene skele Bay\ufffd. One hundred eighty-seven of the species were freshwater, 256 were typical marine fish species, and the other one hundred and fifteen were anadromous and brackish species. Protected species are Rhodeus amarus, Cobitis taenia, Chalcalburnus chalcoides, Alosa immaculata. The dominant fish species in the area are species from the family Mugilidae - Mugil cephalus, with 1800 ind.\/ha and biomass of 36.67 kg\/ha. The population of M. cephalus from these three protected areas is represented by 1 (33.54%), 2 (14.59%), 3 (23.58%), 4 (18.52%) and 5 (9.78%) years old fish; for Ch. auratus: 1 (39.41%), 2(44.21%), 3 (14.28%), 4 (1.98%) and 5 (1.12%) and for Ch. saliens respectively data are as follows: 1 (28.74%), 2 (55.44%), 3 (14.5%) and 4 (1.32) years old fish. The most abundant are the M. cephalus with a length of 24.1 \ufffd 25 \ufffdm (14.91%). The relation between the fish length and the radius of the scales for the M. cephalus is L = 2.582S \ufffd 1.9712, r = 0.9974. The relation between fish length and fish weight for the M. cephalus is W = 0.0132L3.0654, r = 0.9938. The coefficient of Fulton (kf) is 1.77.<\/jats:p>","DOI":"10.5593\/sgem2022\/5.1\/s20.045","type":"proceedings-article","created":{"date-parts":[[2023,2,18]],"date-time":"2023-02-18T11:59:41Z","timestamp":1676721581000},"page":"355-362","source":"Crossref","is-referenced-by-count":1,"title":["RESEARCH OF THE ICHTHYOFAUNA IN THE PROTECTED AREA \"MANDRA-PODA\", \"CHENGENE SKELE BAY\" AND \"OTMANLI\" UNDER NATURA 2000 IN BULGARIA"],"prefix":"10.5593","volume":"22","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9353-1956","authenticated-orcid":true,"given":"Radoslava","family":"Bekova","sequence":"first","affiliation":[{"name":"Institute of Oceanology \"Fridtjof Nansen\", Bulgarian Academy of Science","place":["Bulgaria"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8118-3034","authenticated-orcid":true,"given":"Bogdan","family":"Prodanov","sequence":"additional","affiliation":[{"name":"Institute of Oceanology \"Fridtjof Nansen\", Bulgarian Academy of Science","place":["Bulgaria"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marina","family":"Panayotova","sequence":"additional","affiliation":[{"name":"Institute of Oceanology \"Fridtjof Nansen\", Bulgarian Academy of Science","place":["Bulgaria"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"3602","reference":[{"key":"ref=1","unstructured":"[1] NATURA 2000 \ufffdMapping of conservation status and habitats - phase 1\ufffd - http:\/\/natura2000.moew.government.bg\/Home\/Map"},{"key":"ref=2","unstructured":"[2] River Basin Management Plan in the Black Sea Region for Basin Water Management (2016-2021). https:\/\/www.bsbd.org\/bg\/index_bg_5493788.html"},{"key":"ref=3","unstructured":"[3] Karapetkova, M., M. Zhivkov. 2006. The fish in Bulgaria. Gaia Libris, Sofia, 92 p. (in Bulgarian);"},{"key":"ref=4","unstructured":"[4] Chugunova, N. 1959. Guidance for studying the age and growth of fish. ANSSR, Moscow, 156 p. (in Russian);"},{"key":"ref=5","doi-asserted-by":"crossref","unstructured":"[5] Froese (2006) Froese R. Cube law, condition factor and weight\ufffdlength relationships: history, meta-analysis and recommendations. Journal of Applied Ichthyology. 2006;22:241\ufffd253. doi: 10.1111\/j.1439-0426.2006.00805.x.","DOI":"10.1111\/j.1439-0426.2006.00805.x"},{"key":"ref=6","unstructured":"[6] Zhivkov, M. 1999. Factors, regularities and methodological significance of population-biological variability in freshwater fish species. Dissertation. Institute of Zoology, BAS, Sofia, 406 p. (in Bulgarian);"},{"key":"ref=7","doi-asserted-by":"crossref","unstructured":"[7] Stefanov, T. 2007. Fauna and distribution of fishes in Bulgaria. Biogeography and Ecology of Bulgaria. Springer, pp. 109-139;","DOI":"10.1007\/978-1-4020-5781-6_5"},{"key":"ref=8","unstructured":"[8] Georgiev J. 1967. Species composition of the ichthyofauna of the Bulgarian Black Sea lakes. Proceedings of the Research Institute of Fisheries and Oceanography \ufffd Varma. Vol. VIII, pp 211 \ufffd 227;"},{"key":"ref=9","doi-asserted-by":"crossref","unstructured":"[9] Moncheva S., O. Gotsis-Skretasb, K. Pagoub, A. Krasteva. 2001. Phytoplankton Blooms in Black Sea and Mediterranean Coastal Ecosystems Subjected to Anthropogenic Eutrophication: Similarities and Differences. Estuarine, Coastal and Shelf Science, Volume 53, Issue 3, pp. 281-295;","DOI":"10.1006\/ecss.2001.0767"}],"event":{"name":"22nd SGEM International Multidisciplinary Scientific GeoConference 2022","theme":"Earth and Planetary Sciences","location":"Albena, BG","acronym":"SGEM2022","number":"22","sponsor":["SGEM WORLD SCIENCE (SWS) Scholarly Society, Austria"],"start":{"date-parts":[[2022,7,4]]},"end":{"date-parts":[[2022,7,10]]}},"container-title":["SGEM International Multidisciplinary Scientific GeoConference\ufffd EXPO Proceedings","22nd SGEM International Multidisciplinary Scientific GeoConference Proceedings 2022"],"original-title":[],"deposited":{"date-parts":[[2026,6,25]],"date-time":"2026-06-25T19:25:59Z","timestamp":1782415559000},"score":1,"resource":{"primary":{"URL":"https:\/\/epslibrary.at\/items\/3a5f91a4-57fc-4059-8d48-094c0a85d5b4\/research-of-the-ichthyofauna-in-the-protected-area-mandra-poda-chengene-skele-bay-and-otma"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,11,15]]},"references-count":9,"URL":"https:\/\/doi.org\/10.5593\/sgem2022\/5.1\/s20.045","relation":{},"ISSN":["1314-2704"],"issn-type":[{"value":"1314-2704","type":"print"}],"subject":[],"published":{"date-parts":[[2022,11,15]]}}}