Results of the comparative analysis of fishing conditions for the Azov Sea anchovy in September–November, 2019 and 2020
The data on the stock and abundance of the European anchovy, its age, length, and weight characteristics, and the information on its distribution in the sea before the start of its fishing season have been considered. Abiotic environmental conditions of anchovy autumn migration have been monitored using daily indicators of atmospheric transfers in the area, as well as temperature and sea surface level (altimetry) at various locations of the Kerch pre-strait zones of the Azov and Black Seas from September 20 to November 20. In October 2020, the Azov Sea anchovy was in a better physiological state than in 2019, even though its stock remained virtually the same. Its fishing in the Black Sea in 2019 started early, lasted long, and was low-efficient; in 2020, on the contrary, it was late, short, and productive. Favorable conditions for the start of anchovy fishing in the Azov Sea were created by the northwestern atmospheric transfers and southeastern surface currents in the pre-strait zone of the Azov Sea, and the northern atmospheric transfers and southern surface currents in the Kerch Strait were more favorable for the anchovy migration to the Black Sea. Anchovy fishing in the Azov Sea started at the sea surface temperature 17.0–17.5 °C, and its large-scale fishing in the Black Sea started at 16 °C. In the Kerch pre-strait zone of the Black Sea, the predominance of eastern geostrophic currents facilitates the migration of the Azov Sea anchovy to the Caucasian coast. The strengthening of these currents facilitates the anchovy migration and reduces the effectiveness of its fishing, and their weakening exerts an adverse impact on its migration but increases the effectiveness of its fishing.
| Main Authors: | , , , , |
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| Format: | Journal Contribution biblioteca |
| Language: | Russian |
| Published: |
2021
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| Subjects: | European anchovy, Stock assesment, Fishing conditions, Surface currents, Atmospheric transfers, Abiotic factors, Forecasting, Sea surface temperature, Хамса, Оценка запаса, Условия промысла, Судовой промысел, Прогнозирование, Абиотические факторы, ASFA_2015::F::Fishing fleet, ASFA_2015::A::Anchovy fisheries, ASFA_2015::F::Fishing seasons, |
| Online Access: | http://hdl.handle.net/1834/41804 |
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