The Key Threats to Sturgeons and Measures for Their Protection in the Lower Danube Region

  • Mirjana Lenhardt
  • Ivan Jarić
  • Gorčin Cvijanović
  • Marija Smederevac-Lalić
Part of the NATO Science for Peace and Security Series C: Environmental Security book series (NAPSC)

Abstract

The six native sturgeon species have been commercially harvested in the Danube Basin for more than 2,000 years, with rapid decrease in catch by mid 19th century. Additional negative effect on sturgeon populations in the Danube River was river regulation in Djerdap region, due to navigation in the late 19th century, as well as dam construction in the second half of 20th century that blocked sturgeon spawning migrations. Beside over-fishing and habitat loss, illegal trade, life history characteristics of sturgeon, lack of effective management (due to lack of transboundary cooperation and change in political situation in Lower Danube Region countries) and pollution all pose serious threats on sturgeon populations in Lower Danube Region. International measures established by the Convention on International Trade in Endangered Species (CITES) in late 20th century, listing of beluga (Huso huso) as an endangered species under the U.S. Endangered Species Act, as well as development of Action plan for conservation of sturgeons in the Danube River Basin, had significant impact on activities related to sturgeon protection at beginning of 21st century. These actions were aimed towards diminishment of pressure on natural sturgeon populations and aquaculture development in countries of Lower Danube Region. The main goal of the Action Plan was to raise public awareness and to create a common framework for implementation of urgent measures. Black Sea Sturgeon Management Action Group (BSSMAG) was founded as a consultative body to improve transboundary cooperation among countries in Lower Danube Region. Nevertheless, more actions are necessary in the field of basic scientific investigation, NGO involvement and better connection among all stakeholders. Everyone involved in sturgeon protection must be aware that the sturgeon recovery, as well as their extinction, is a multi-decadal affair, especially for species with long life and late maturing like beluga. Resource users and other stakeholders must be patient enough to support recovery plans, which will allow only small-scaled sturgeon fisheries, or even fisheries that will be performed by some future generations.

Keywords

Acipenseriformes CITES aquaculture beluga over-fishing 

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References

  1. Action plan, 2006, Action plan for the conservation of sturgeons (Acipenseridae) in the Danube River basin, Nat Environ 144, Council of Europe.Google Scholar
  2. Bacalbasa-Dobrovici, N., 1997, Endangered migratory sturgeons of the lower Danube River and its delta, Environ Biol Fish 48:201–207.CrossRefGoogle Scholar
  3. Bacalbasa-Dobrovici, N., and Holcik, J., 2000, Distribution of Acipenser sturio L., 1758 in the Black Sea and its watershad, Bol Inst Esp Oceanogr 16(14):37–41.Google Scholar
  4. Bemis, W. E., and Findeis, E. K., 1994, The sturgeon’s plight, Nature 370:602.CrossRefGoogle Scholar
  5. Berge, D., and Dahl-Hansen, G., 2005, Management of freshwater fisheries on bordering rivers; EU-regulations in the field of water and fish management, NIVA report SNO 5001–2005, ISBN 82-577-4699-1.Google Scholar
  6. Bloesch, J., 2006, The ultimate need for implementation of sturgeon protection in the Danube River — a view of 2006 and call for actions with the sturgeon Action Plan under Bern Convention, Proceedings of the 36th International Conference of IAD, Austrian Committee Danube Research/IAD, Vienna, pp. 132–136.Google Scholar
  7. Ceapa, C., Williot, P., and Bacalbasa-Dobrovici, N., 2002a, Present state and perspective of stellate sturgeon brood fish in the Romanian part of the Danube, Int Rev Hydrobiol 87:507–513.CrossRefGoogle Scholar
  8. Ceapa, C., Williot, P., Le Menn, F., and Davail-Cuisset, B., 2002b, Plasma sex steroids and vitellogenin levels in stellate sturgeon (Acipenser stellatus Pallas) during spawning migration in the Danube River, J Appl Ichthyol 18:391–396.CrossRefGoogle Scholar
  9. Ceapa, C., Williot, P., Le Menn, F., and Davail-Cuisset, B., 2002b, Plasma sex steroids and vitellogenin levels in stellate sturgeon (Acipenser stellatus Pallas) during spawning migration in the Danube River, J Appl Ichthyol 18:391–396.CrossRefGoogle Scholar
  10. Ciereszko, A., Dabrowski, K., and Ochkur, S. I., 1996, Characetrization of acrosin-like activity of lake sturgeon (Acipenser fulvescens) spermatozoa, Mol Reprod Dev 45:72–77.CrossRefGoogle Scholar
  11. Finn, R. N., Lenhardt, M., Ferrara, A., Isely, J. J., Dean, J., and Fyhn, H. J., 2003, Yolk proteinsand free amino acids in Acipenseriformes, Proceedings of the 26th Annual Larval Fish Conference, Bergen, 22–26 July 2002, Norway.Google Scholar
  12. Guti, G., 2006, Past and present status of sturgeons in Hungary, Proceedings of the 36th International Conference of IAD, Austrian Committee Danube Research/IAD, Vienna, pp. 143–147.Google Scholar
  13. Hung, S. S. O., and Deng, D. F., 2002, Sturgeon, Acipenser spp. In: Nutrient requirement and feeding of finfish for aquaculture, C. D. Webster, and C. Lim, eds., CAB International, New York, NY, pp. 344–357.Google Scholar
  14. Kolarevic, J., Lenhardt, M., Cakic, P., and Jaric, I., 2004, Population study of the Danube sterlet (Acipenser ruthenus L.). In: Otterstad, releasing development potentials at the Eastern Adriatic, O. Oddmund, ed., NTNU; http://www.easternadriatic.com.
  15. Lahnsteiner, F., Berger, B., Horvath, A., and Urbanyi, B., 2004, Studies on the semen biology and sperm cryopreservation in the sterlet, Acipenser ruthenus L., Aquac Res 35:519–528.CrossRefGoogle Scholar
  16. Lenhardt, M., Cakic, P., and Kolarevic, J., 2004a, Influence of the HEPS Djerdap I and Djerdap II dam construction on catch of economically important fish species in the Danube River, Ecohydrol Hydrobiol 4:499–502.Google Scholar
  17. Lenhardt, M., Cakic, P., Kolarevic, J., Mickovic, B., and Nikcevic, M., 2004b, Changes in sterlet (Acipenser ruthenus L.) catch and length frequency distribution in the Serbian part of the Danube River during the twentieth century, Ecohydro Hydrobiol 4:193–197.Google Scholar
  18. Lenhardt, M., Kolarevic, J., Jaric, I., Cvijanovic, G., Mickovic, B., Gacic, Z., Cakic, P., and Nikcevic, M., 2004c, Assessment concepts for river ecosystems characterization based on sterlet (Acipenser ruthenus L.) population research, Proceedings of the Fifth International Symposium on Ecohydraulics “Aquatic habitats: analysis & restoration’, Madrid, 12–17 September, pp. 153–156.Google Scholar
  19. Lenhardt, M., Finn, R. N., Cakic, P., Kolarevic, J., Krpo-Cetkovic, J., Radovic, I., and Fyhn, H. J., 2005a, Analysis of the post-vitellogenic oocytes of three species of Danubian Acipenseridae, Belg J Zool 135(2):205–207.Google Scholar
  20. Lenhardt, M., Hegedis, A., and Jaric, I., 2005b, Action plan for sturgeon management in fishery waters of Republic Serbia, Institute for Biological research, Belgrade, pp. 1–21.Google Scholar
  21. Lenhardt, M., Bloesch, J., Reinartz, R., Suciu, R., Ivanova, P., Guti, G., Pannonhalmi, M., and Tsekov, A., 2006a, The actual situation of the endangered sturgeons in the Danube River Basin, Danube News 13–14:18–22.Google Scholar
  22. Lenhardt, M., Hegediš, A., Mićković, B., Višnjić-Jeftić, Ž., Smederevac, M., Jarić, I., Cvijanović, G., and Gačić, Z., 2006b, First record of the North American paddlefish (Polyodon spathula Walbaum, 1792) in the Serbian part of the Danube River. Arch Biol Sci 58(3):27P–28P.Google Scholar
  23. Lenhardt, M, Jaric, I., Bojovic, D., Cvijanovic, G., and Gacic, Z., 2006c, Past and current status of sturgeon in the Serbian part of the Danube River, Proceedings of the 36th International Conference of IAD, Austrian Committee Danube Research/IAD, Vienna, pp. 148–151.Google Scholar
  24. Lenhardt, M., Jaric, I., Kalauzi, A., and Cvijanovic, G., 2006d, Assessment of extinction risk and reasons for decline in sturgeon, Biodivers Conserv 15:1967–1976.CrossRefGoogle Scholar
  25. Moreau, R., and Dabrowski, K., 2000, Biosynthesis of ascorbic acid by extant actinopterygians, J Fish Biol 57:733–745.CrossRefGoogle Scholar
  26. Navodaru, I., Staras, M., and Banks, R., 1999, Management of the sturgeon stocks of the Lower Danube River system. In: The Delta’s: State-of-art protection and management, Conference Proceedings, Tulcea, Romania 26–31 July 1999, pp. 229–237.Google Scholar
  27. Nikcevic, M., Lenhardt, M., Cakic, P., Mickovic, B., Kolarevic, J., and Jaric, I., 2004, Historical review and new initiatives for sturgeon fisheries, aquaculture and caviar production in Serbia and Montenegro. In: Otterstad, releasing development potentials at the Eastern Adriatic, O. Oddmund, ed., NTNU; http://www.easternadriatic.com.
  28. Paraschiv, M., and Suciu, R., 2006, Present state of sturgeon stocks in the Lower Danube River, Romania, a review, Proceedings of the 36th International Conference of IAD, Austrian Committee Danube Research/IAD, Vienna, pp. 152–158.Google Scholar
  29. Patriche, N., Pecheanu, C., and Billard, R., 1999, Sturgeon fisheries, caviar production in Romania and possible measures of rehabilitation in the Lower Danube, Rivista Italiana di Acquacultura 34:83–91.Google Scholar
  30. Petrovic, M., 1998, Ribarstvo [Fisheries], Zavod za udzbenike i nastavna sredstva, Belgrade [In Serbian].Google Scholar
  31. Reinartz, R., 2002, Sturgeons in the Danube River, International Association for Danube Research, Vienna.Google Scholar
  32. Reinartz, R., Bloesch, J., Ring, T., and Stein, H., 2003, Sturgeon are more than caviar: A plea for the revival of sturgeons in the Danube River (Literature review), Arch Hydrobiol 14(Suppl Large Rivers 3–4):387–403.Google Scholar
  33. Secor, D. H., Anders, P. J., Winkle, W. V., and Dixon, D. A., 2002, Can we study sturgeons to extinction? What we do and don’t know about the conservation of North American sturgeons, American Fisheries Society Symposium 28, pp. 3–10.Google Scholar
  34. Simonovic, P., Budakov, L. J., Maric, S., and Nikolic, V., 2005, Recent record on ship sturgeon Acipenser nudiventris in the middle Danube (Serbia), Biologia 60(2):231–233.Google Scholar
  35. Simonovic, P., Maric, S., and Nikolic, V., 2006, Occurence of paddlefish Polyodon spathula (Walbaum, 1792) in the Serbian part of the lower River Danube, Aquatic Invasions 1(3): 183–185.CrossRefGoogle Scholar
  36. Stanic, B., Andric, N., Zoric, S., Grubor-Lajsic, G., and Kovacevic, R., 2004, Biochemical response of sterlet Acipenser ruthenus collected from the River Danube, Proceedings of the 35th International Conference of IAD, IAD, Vienna, pp. 281–287.Google Scholar
  37. Stamenkovic, S., 1991, Evolution des captures de troits especes d’esturgeons Huso huso, Acipenser gueldenstaedtii, et Acipenser stellatus dans la partie Yougoslave du Danube. In: Acipenser, P. Williot, ed., Cemagref Publications, Bordeaux, pp. 179–183.Google Scholar
  38. U.S. Fish and Wildlife Service, 2005, Endangered and threatened wildlife and plants; special rule to control the trade of threatened beluga sturgeon (Huso huso), Federal Register 70(42): 10493–10507.Google Scholar
  39. Vassilev, M., 2003, Spawning sites of beluga sturgeon (Huso huso L.) located along the Bulgarian-Romanian Danube stretch, Acta Zool Bulg 55(2):91–94.Google Scholar
  40. Vassilev, M., and Pehlivanov, L., 2003, Structural Changes of Sturgeon Catches in the Bulgarian Danube Section, Acta Zool Bulg 55:97–102.Google Scholar
  41. Vecsei, P., Sucui, R., and Peterson, D., 2002, Threatened fishes of the world: Huso huso (Linnaeus, 1758) (Acipenseridae), Environ Biol Fish 65:363–365.CrossRefGoogle Scholar
  42. Vecsei, P., Peterson, D., Suciu, R., and Artyukhin, E., 2007, Threatened fishes of the world, Acipenser stellatus, Pallas, 1771 (Acipenseridae), Environ Biol Fish 78(3):211–212.CrossRefGoogle Scholar

Copyright information

© Springer Science + Business Media B.V. 2008

Authors and Affiliations

  • Mirjana Lenhardt
    • 1
  • Ivan Jarić
    • 2
  • Gorčin Cvijanović
    • 2
  • Marija Smederevac-Lalić
    • 2
  1. 1.Institute for Biological ResearchBelgradeSerbia
  2. 2.Center for Multidisciplinary StudiesSerbia

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