Abstract
A new finding of longtail dwarf goby Knipowitschia longecaudata (Kessler, 1877) from the upper reaches of the unregulated section of the Volga River (Krasnoarmeysky raion, Volgograd City, 48°29′ N, 44°44′ E) is described. Data on the morphological and genetic variability of this species are presented. A low genetic differentiation between the sympatric species K. longecaudata and K. caucasica is shown, which requires particular attention when identifying these species. It is assumed that the donor region for this goby into the Volga could be the reservoirs of the Don River basin, while the Volga–Don canal served as the transit corridor. There is a high probability that more longtail dwarf gobies will be introduced into the waterbodies of the Lower and Middle Volga.
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ACKNOWLEDGMENTS
We are grateful to D.D. Pavlov (Papanin Institute for Biology of Inland Waters, Russian Academy of Sciences) and A.A. Makhrov (Severtsov Institute of Problems of Ecology and Evolution, Russian Academy of Sciences) for their comprehensive assistance in this study, as well as to two anonymous reviewers for their proposed additions and corrections of the manuscript.
Funding
The expeditions aboard RV Akademik Topchiev were carried out as part of State Task for the Papanin Institute for Biology of Inland Waters, Russian Academy of Sciences, project 21051100104-6. Genetic analysis was financially supported by the Russian Foundation for Basic Research, grant no. 20-34-70020.
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Kodukhova, Y.V., Karabanov, D.P. Finding of Longtail Dwarf Goby Knipowitschia longecaudata (Actinopterygii: Gobiidae) in the Upstream Part of Unregulated Section of the Volga River. Inland Water Biol 14, 620–625 (2021). https://doi.org/10.1134/S1995082921050072
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DOI: https://doi.org/10.1134/S1995082921050072