To evaluate the work on the reaclimatization of sterlet Acipenser ruthenus (Linnaeus, 1758) in the upper reaches of the Dnieper
https://doi.org/10.37663/0131-6184-2022-5-69-76
Abstract
Based on the results of ichthyological monitoring of VNIRO, a preliminary assessment of the work on the reaclimatization of sterlet in the upper reaches of the Dnieper River within the borders of the Smolensk region is given. Data on its occurrence in catches of smooth nets, size and age indicators, stages of maturity of gonads are given. A comparison of the nutrition composition of the Dnieper sterlet with the sterlet of the upper reaches of the Oka and Klyazma rivers is given. The dynamics of the output of juveniles, the average biomass of sterlet in the riverbed within the borders of the Smolensk region are shown. Accounting of early juvenile fish in the Dnieper for a number of years showed the absence of sterlet larvae in ichthyoplankton traps. To confirm the naturalization of this species of sturgeon, it is necessary to increase the number of ichthyological monitoring sites on the territory of the Republic of Belarus.
About the Authors
A. D. Bykov
All–Russian Scientific Research Institute of Fisheries and Oceanography (VNIRO)
Russian Federation
Russian Federation
A.D. Bykov – Candidate of Biological Sciences, Leading Researcher
S. Y. Brazhnik
All–Russian Scientific Research Institute of Fisheries and Oceanography (VNIRO)
Russian Federation
Russian Federation
S.Y. Brazhnik – Candidate of Biological Sciences, Head of the Freshwater Fish Department
V. V. Obrazov
All–Russian Scientific Research Institute of Fisheries and Oceanography (VNIRO)
Russian Federation
Russian Federation
V.V. Obrazov – Leading Engineer – The Freshwater Fish Department
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Review
For citations:
Bykov A.D., Brazhnik S.Y., Obrazov V.V. To evaluate the work on the reaclimatization of sterlet Acipenser ruthenus (Linnaeus, 1758) in the upper reaches of the Dnieper. Fisheries. 2022;(5):69-76. (In Russ.) https://doi.org/10.37663/0131-6184-2022-5-69-76
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