Role of sea current spatio-temporal variability in the Azov anchovy overwintering migration into the Black Sea
https://doi.org/10.36038/2307-3497-2025-201-24-32
EDN: FVFXZW
Abstract
The aim: to characterize sea current influence on the direction of the Azov anchovy overwintering migration into the Black Sea.
Material and methods: the assessment was based on long-term Azov anchovy catch statistics from ship and coastal fisheries and data of currents in the Kerch pre-strait area in 2015-2024 based on the Copernicus monitoring project dataset. The hypothesis of a relationship between spatio-temporal changes in sea currents and the direction of the Azov anchovy migration was tested using nonparametric statistics (Mann-WhitneyWilcoxon test) and spatial analysis.
Results: the relationship between the eastern and northern currents, that related with the direction of the Azov anchovy migration in the Kerch Strait area, was shown. Spatial patterns in the eastern and northern components of the currents that determine the migration direction have been identified. The key factors in determining the migration direction are: 43rd, 45th and 46th weeks of the year for the eastern component of the currents, 46th week for the northern component of the currents.
Novelty: using statistical spatio-temporal analysis of long-term data the relationship between currents and Azov anchovy overwintering migration was showed.
Practical significance: long-term spatial patterns of sea currents and their influence on the direction of the Azov anchovy migration into the Black Sea can make it possible to increase the efficiency of organizating Russian fisheries.
About the Authors
V. N. Belousov
Azov-Black Sea branch of «VNIRO» («AzNIIRKH»)
Russian Federation
Russian Federation
21 в, Beregovaya st., Rostov-on-Don, 344002
M. M. Piatinskii
Azov-Black Sea branch of «VNIRO» («AzNIIRKH»)
Russian Federation
Russian Federation
21 в, Beregovaya st., Rostov-on-Don, 344002
V. A. Shlyakhov
Azov-Black Sea branch of «VNIRO» («AzNIIRKH»)
Russian Federation
Russian Federation
21 в, Beregovaya st., Rostov-on-Don, 344002
S. N. Kulba
Azov-Black Sea branch of «VNIRO» («AzNIIRKH»)
Russian Federation
Russian Federation
21 в, Beregovaya st., Rostov-on-Don, 344002
D. G. Bitiutskii
Russian Federal Research Institute of Fisheries and Oceanography («VNIRO»);
Institute of Biology of the KarRC RAS («IB KarRC RAS»)
Russian Federation
Russian Federation
19, Okruzhnoy proezd, Moscow, 105187;
11, Pushkinskaya street, Petrozavodsk, 185910
R. V. Nadolinskii
Azov-Black Sea branch of «VNIRO» («AzNIIRKH»)
Russian Federation
Russian Federation
21 в, Beregovaya st., Rostov-on-Don, 344002
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Review
For citations:
Belousov V.N., Piatinskii M.M., Shlyakhov V.A., Kulba S.N., Bitiutskii D.G., Nadolinskii R.V. Role of sea current spatio-temporal variability in the Azov anchovy overwintering migration into the Black Sea. Trudy VNIRO. 2025;201:24-32. (In Russ.) https://doi.org/10.36038/2307-3497-2025-201-24-32. EDN: FVFXZW
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