Delia OPREA, Lucian OPREA, Ștefan HONŢ, Daniela Nicoleta HOLOSTENCO, Marian PARASCHIV, Eelena TAFLAN, Marian Ion IANI

Detailed analysis of beluga sturgeon (Huso huso) and stellate sturgeon (Acipenser stellatus) migration in the Lower Danube River

The swimming ground speed and swimming depths of beluga sturgeon (Huso huso) and stellate sturgeon (Acipenser stellatus)were investigated using ultrasonic telemetry between 2011 and 2017 in the Lower Danube River (river kilometer (rkm) 0 Sulina–rkm1075 Baziaș). Acoustic telemetry receivers VR2W and V16TP tags (Vemco, Canada) were used to collect data about sturgeon migrationbehavior in the Lower Danube River between the Black Sea and the Iron Gate II dam. The tags, equipped with depth and temperaturesensors, provided data about beluga and stellate sturgeon migration periods, swimming speeds, and depths. Twenty-three belugasturgeon (184–245 cm TL) and twenty-one stellate sturgeon (92–135 cm TL) were ultrasonically tagged and passively tracked usinghydrophone receivers installed in the river between rkm 71 and rkm 860. Three tagged beluga sturgeon returned after 2 and 5 years andtwo stellate sturgeon returned after 2 years since the time of their initial release in the river. This study provides, for the first time, furtherdetails concerning beluga sturgeon and stellate sturgeon migratory behavior patterns, traveled distances, swimming depths, and theirswimming ground speeds during spawning migration.

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Antipa G (1909). Ichthyological Fauna of Romania. Bucharest, Romania: Institutulde Arte Grafice “Carol Göbl” (in Romanian).
Antipa G (1916). Pescăria si pescuitul in Romania. Bucharest, Romania: Academia Romania (in Romanian).
Bănărescu MP (1964). Fauna Republicii Populare Romîne. Volumul XIII. Pisces-Osteichthyes (pești ganoizi și osisi). Bucharest, Romania: Editura Academiei Republicii Populare Române (in Romanian).
Billard R, Guillaume L (2000). Biology and conservation of sturgeon and paddlefish. Reviews in Fish Biology and Fisheries 10: 355- 392.
Crossman JA, Hammell KL, Litvak MK (2013). Experimental examination of surgical procedures for implanting sonic transmitters in juvenile shortnose sturgeon and Atlantic Sturgeon. North American Journal of Fisheries Management 33: 549-556.
Guy CS, Brown ML (2007). Analysis and Interpretation of Freshwater Fisheries Data. Bethesda, MD, USA: American Fisheries Society.
Hensel K, Holcik J (1997). Past and current status of sturgeons in the upper and middle Danube River. Developments in Environmental Biology of Fishes 17: 185-200.
Holcik J (1989). The Freshwater Fishes of Europe: Vol. I, Part II. General Introduction to Fishes, Acipenseriformes. Wiesbaden, Germany: AULA Verlag.
Iani M, Honţ Ş, Paraschiv M, Suciu R (2017). A novel electronarcosis method to anaesthetize adult sturgeon in the river during surgical implantation of acoustic tags. Scientific Annals of the Danube Delta Institute 22: 29-34.
Khodorevskaya RP, Pavlov DS, Ruban GJ (2009). Behaviour, Migrations, Distribution, and Stocks of Sturgeons in the Volga-Caspian Basin. World Sturgeon Conservation Society. Liverpool, UK: Fisheries Society of the British Isles.
Kynard B, Suciu R, Horgan M (2002). Migration and habitats of diadromous Danube River sturgeons in Romania 1998–2000. Journal of Applied Ichthyology 18: 529-535.
Nelson TC, Doukakis P, Lindley ST, Schreier AD, Hightower JE et al. (2010). Modern Technologies for an Ancient Fish: Tools to Inform Management of Migratory Sturgeon Stocks. Report for the Pacific Ocean Shelf Tracking (POST) Project. Vancouver, Canada: POST.
Onără D, Suciu R, Paraschiv M, Iani M, Holostenco D et al. (2011). Contributions to understanding the spawning ecology of beluga sturgeons in the Lower Danube River, Romania. In: International Conference on Conservation, Recovery and Sustainable Use of Danube River Sturgeons; Tulcea, Romania.
Oţel V (2007). Atlasulpeştilor din Rezervaţia Biosferei Delta Dunării. Tulcea, Romania: Centrul de Informare Tehnologică Delta Dunării (in Romanian).
Suciu R, Dalia O, Paraschiv M, Holostenco D, Hont S (2013). Sturgeons in the Lower Danube River. Danube News 28: 10-16.
Taylor AD, Litvak MK (2017). Timing and location of spawning based on larval capture and ultrasonic telemetry of Atlantic sturgeon in the Saint John River, New Brunswick. Transactions of the American Fisheries Society 146: 283-290. doi: 10.1080/00028487.2016.1264471
Thorstad EB, Rikardsen AH, Alp A, Økland F (2013). The use of electronic tags in fish research – An overview of fish telemetry methods. Turkish Journal of Fisheries and Aquatic Sciences 13: 881-896.
Vassilev M (2003). Spawning sites of beluga (Huso huso L.) located along the Bulgarian-Romanian Danube River. Acta Zoologica Bulgarica 55 (2): 91-94.