The influence of regional atmospheric circulation on the migration of anchovy in the northern half of the Black Sea

The aim of this work is to analyze the long-term changes of atmospheric circulation parameters over the Black Sea in 2000-2021 and compare them with the long-term dynamics of the anchovy stock in the Sea of Azov and the catch of Black Sea anchovy off the coast of Crimea.

Materials and methods: the data of August surveys of anchovy in the Sea of Azov, fishery statistics on the catch of Black Sea anchovy, data of Copernicus Marine Service information system on satellite altimetry in the north-e astern part of the sea in April and near the western shores of the Crimean Peninsula in November, indices of regional atmospheric circulation, graphical and statistical methods of analyzing these data were used in the work.

Scientific novelty: the element of novelty in the work is the use of annual and long-term variability of atmospheric circulation indices in the study of anchovy migration in the Black Sea.

Result: it is shown that in the north-e astern part of the Black Sea in April the strengthening of eastern atmospheric transports favorably influences the formation of high summer stocks of anchovy in the Sea of Azov, and the strengthening of western transports in the north-w estern part of the sea in October promotes on the formation of high commercial winter stocks of Black Sea anchovy near the coast of Crimea. The reason for these changes in atmospheric circulation is the annual variability of vorticity of zonal atmospheric transports over the sea.

Practical significance: the obtained results can be used in predictive assessments of the Azov and Black Sea anchovy reserves in the waters of the Russian Federations with seasonal advancement.

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