Drifting Nets as a Tool to Achieve Fish Management and Conservation Purposes in the Lower Danube River
By: Apostolou Apostolos and Velkov Boris

References
- Allan, J. D., Abell, R., Hogan, Z., Revenga, C., Taylor, B. W., Welcomme, R. L., Winemiller, K. (2005). Overfishing of inland waters. BioScience, 55, 12, 1041-1051. https://doi.org/10.1641/0006-3568(2005)055[1041:OOIW]2.0.CO;2
- Apostolou, A., Pehlivanov, L., Schabuss, M., Zorning, H. (2021). Monitoring fish in Lower Danube River main channel by applying various sampling methodologies Acta Zoologica Bulgarica, 73, 2, 269-274. https://acta-zoologica-bulgarica.eu/2021/002417.pdf
- Balaci, K., Stroe, D., Dobre, A., Vidu, L., Nikolov, G., Nicolae C. (2025). The importance of commercial fisheries in the Romanian part of the Danube River, evolution and challenges. Scientific Papers. Series D. Animal Science. Vol. LXVIII, No. 1 833-841. https://animalsciencejournal.usamv.ro/pdf/2025/issue_1/Art92.pdf
- Balon, E.K., 2004. About the oldest domesticates among fishes. J. Fish Biol. 65 (Suppl. A), 1–27. https://doi.org/10.1111/j.0022-1112.2004.00563.x
- Bartosiewicz, L., Bonsall, C. (2004). Prehistoric fishing along the Danube. Antaeus 27, 253–272. https://www.researchgate.net/publication/210291143_Prehistoric_Fishing_along_the_Danube
- Bern Convention on the Conservation of European Wildlife and Natural Habitats (1979). Appendices. [cited 2026 February 20]. Available from: https://www.coe.int/en/web/bern-convention/appendices
- Bulgarian Ministry of Agriculture and Food (2024). Annual report for the condition and the development of the agriculture during 2023. (In Bulgarian). [cited 2026 February 20]. Available from: https://www.mzh.government.bg/media/filer_public/2025/01/16/ad_2024_bg.pdf
- CEN - EN 14011, (2003). Water quality - Sampling of fish with electricity. Brussels, 16 p.
- Clarke, K.R., Warwick, R.M. (2001). Change in Marine Communities: An Approach to Statistical Analysis and Interpretation. 2nd Edition, PRIMER-E, Ltd., Plymouth Marine Laboratory, Plymouth. https://scottgabara.weebly.com/uploads/5/2/5/0/52500867/clarke_warwick_-_2001_-_unknown_-_change_in_marine_communities.pdf
- Convention on the Conservation of Migratory Species of Wild Animals, done at Bonn, June 23, 1979, 1651 UNTS 241 (entered into force Nov. 1, 1983). https://www.cms.int/species/appendix-i-ii-cms
- de Bruyn, M., Barbato, M., Broadhurst, M. (2021). Metabarcoding gillnets to assess unaccounted catch depredation or escape. Environmental DNA, 4, 1, 157-166. https://doi.org/10.1002/edn3.234
- Dias, V., Oliveira, F., Boavida, J., Serrão, E. A., Gonçalves, J. M., Coelho, M.A. (2020). High coral bycatch in bottom-set gill net coastal fisheries reveals rich coral habitats in southern Portugal. Frontiers in Marine Science, 7:603438. https://doi.org/10.3389/fmars.2020.603438
- Dinu, A. (2010). Mesolithic fish and fishermen of the Lower Danube (Iron Gates). Documenta Praehistorica, 37, 299–310. http://dx.doi.org/10.4312/dp.37.26.
- ЕAFA (National Agency for Fisheries and Aquaculture, Ministry of Agriculture and Forestry. Sofia, Bulgaria) (2025); a. [cited 2026 February 20]. Temporary fishing bans. (In Bulgarian). Available from: https://iara.government.bg/wps/portal/iara-web/home/useful.information/prohibition
- ЕAFA (National Agency for Fisheries and Aquaculture, Ministry of Agriculture and Forestry. Sofia, Bulgaria) (2025); b. Data on fish or other aquatic organisms landed in the previous year. (In Bulgarian). [cited 2026 February 20]. Available from: https://iara.government.bg/wps/portal/iaraweb/fishing.and.aquaculture/commercial.fishing/public.registers.commecial.fishing/sr1/sr1
- IUCN (2026). The IUCN Red List of Threatened Species. Version 2024-2. [cited 2026 February 20]. Available from: https://www.iucnredlist.org.
- Hilborn. R., Branch, T. A., Ernst, B., Magnusson, A., Minte-Vera, C.V., Scheuerell, M. D., Valero, J. L. (2003). State of the world’s fisheries. Annual Review of Environment and Resources, 28, 359-399. https://doi.org/10.1146/annurev.energy.28.050302.105509
- Hammer, Ø.; Harper, D.A.T.; Ryan, P.D. (2001) Past: Paleontological Statistics Software Package for Education and Data Analysis, Versus 5. Palaeontol. Electron. 2001, 4, 9. [cited 2026 February 20]. Available from: https://www.nhm.uio.no/english/research/resources/past/
- Honţ, S., Paraschiv, M., Iani, M. (2021). Preliminary migratory fish habitats assessment along the Danube River sector km 863 – 375. North-Western Journal of Zoology, 18, 1, 24-29. http://biozoojournals.ro/nwjz/index.html
- Liska, I., Wagner, F., Sengl, M., Deutsch, K., Slobodník, J., Paunović M. (2022). JDS4 Scientific Report: A Shared Analysis of the Danube River. ICPDR, 565. https://www.danubesurvey.org/jds4/files/nodes/documents/jds4_scientific_report_45mb.pdf
- MOEW (2025); a. Order RD09-1044/20.11.2025 for the prohibition on catching sturgeon species (In Bulgarian). [cited 2026 February 20]. Available from: https://www.mzh.government.bg/media/filer_public/2025/12/09/zapoved-zabrana-esetri-postoianna_esHqIzr.pdf
- MOEW (2026); b. Information System on Protected Areas from the Ecological Network NATURA 2000. (In Bulgarian). [cited 2026 February 20]. Available from: https://natura2000.egov.bg/EsriBg.Natura.Public. Web.App
- Nenov N. (2025). Fishermen on the Danube. Heritage and cultural landscape. PhD thesis, New Bulgarian University, Sofia, 332 p. (In Bulgarian). file:///C:/Users/Admin/AppData/Local/Temp/MicrosoftEdgeDownloads/899b3320-c1f4-4429-b93fe32dd434c668/avtoreferat-prof-n-nenov.pdf
- Ordinance 37 (2008). Ordinance on the use of dams state property, in terms of fisheries and the rules for carrying out commercial, recreational fishing and aquaculture in the sites - state property under Art. 3, para. 1 of the Fisheries and Aquaculture Act. In Bulgarian. [cited 2026 February 20]. Available from: https://www.mzh.government.bg/media/filer_public/2020/12/22/naredba__37_ot_2008_g.pdf
- Matsuoka, T., Nakashima, T., Nagasawa, N. (2005). A review of ghost fishing: scientific approaches to evaluation and solutions. Fisheries Science, 71, 4, 691-702. https://doi.org/10.1111/j.1444-2906.2005.01019.x
- Raykov, V., Triantaphyllidis, G. (2015). Review of driftnet fisheries in Bulgarian marine and inland waters. Journal of Aquaculture & Marine Biology, 2, 2, 36-44. https://doi.org/10.15406/jamb.2015.02.00017
- Reporting under Article 17 of the Habitats Directive Web Tool. [cited 2026 February 20]. Available from: https://nature-art17.eionet.europa.eu/article17/species/report/
- Romanescu, G. (2013). Geoarchaeology of the ancient and medieval Danube Delta: modeling environmental and historical changes. A review. Quaternary International, 293, 231–244. https://doi.org/10.1016/j.quaint.2012.07.008
- Rudstam, L. G., Magnuson, J. J., Tonn W., M. (1984). Size selectivity of passive fishing gear: a correction for encounter probability applied to gill nets. Canadian Journal of Fisheries and Aquatic Sciences, 41, 8, 1252-1255. https://doi.org/10.1139/f84-151
- Solheim, A. J., Thrane, S., Mentzel, Moe, S. (2025). Harmonised biological indicators for rivers and lakes: Towards European assessment of temporal trends in ecological quality. Ecological indicators, 171, 113207. https://doi.org/10.1016/j.ecolind.2025.113207
- Tian, B., Chang, S. Ye S., Zhang, Y., Wang, Y., Wang, S., Wu, L., Zhang, T. (2025). Spatio-Temporal Dynamics of Fish Community and Influencing Factors in an Urban River (Haihe River), China. Sustainability, 17, 1, 231. https://doi.org/10.3390/su17010231
- UNEP-WCMC, IUCN (2024). Protected Planet: The World Database on Protected Areas (WDPA), January 2024 release (or specific month), Cambridge, UK: UNEPWCMC and IUCN. [cited 2026 February 20]. Available from: www.protectedplanet.net.
- Yemane, D., Field, J. G., Leslie, R. W. (2005). Exploring the effects of fishing on fish assemblages using Abundance Biomass Comparison (ABC) curves. ICES Journal of Marine Science, 62, 374-379. https://doi.org/10.1016/j.icesjms.2005.01.009
- Zajicek, P., Wolter, C. (2018). The gain of additional sampling methods for the fish-based assessment of large rivers. Fisheries Research 197, 15-24. https://doi.org/10.1016/j.fishres.2017.09.018
- Zlatanova, S. (2004). Freshwater fisheries: principles, mechanisms and elements of fishery management, which contribute to decrease of biodiversity of freshwater ecosystems and the unsustainable use of inland fishery resources. Country: Bulgaria. Freshwater Fisheries in Central & Eastern Europe: The Challenge of Sustainability. Questionnaire. IUCN ESUSG. Fisheries WG. 94. Zmeev, R. (1995). The fisheries among the Bulgarians. Vselena, Montana, 271 pp. (In Bulgarian).
Language: English
Page range: 99 - 106
Submitted on: Feb 25, 2026
Accepted on: Apr 22, 2026
Published on: May 29, 2026
Published by: University of Zagreb, Faculty of Agriculture
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
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© 2026 Apostolou Apostolos, Velkov Boris, published by University of Zagreb, Faculty of Agriculture
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.