On the role of temperature as a factor influencing the behavior of the European sprat and the efficiency of its fishing
This paper presents the results of monitoring of the European sprat fishing, carried out in April–October of 2019, which make it possible to characterize specific features of the variability of sea surface temperature (SST), both seasonal and synoptic, as well as the behavior of the European sprat and the efficiency of its fishing. For this purpose, the daily SST maps of the Black and Azov Seas, created in the Hydrometeorological Center of Russia and based on the NCDC/NOAA (ESIMO Operational Module) data, and daily fishing information of the FSBI “Centre of Fishery Monitoring and Communications” have been used. The trends in the fishing pressure (daily catch) of each vessel and the average daily fishing pressure for the vessels in general have been investigated, and the information about the operation area of each vessel and SST in the main fishing areas has been collected. To study the changes of these parameters with time, mainly the methods of graphical analysis have been used. It is shown that the first period of relatively high density of sprat aggregations was noted at winter water temperatures, the second one coincided with a steady increase in SST, and the third period fell on the stabilization of summer temperature conditions. During this period, signs of a direct dependence of the sprat fishing efficiency on SST were revealed for the Caucasian fishing area and the South Coast of the Crimea; along the western coast of the Crimea, an inverse relation between them was found out. Effective fishing ceased after the SST decreased below 23.5 °C.
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Contribution biblioteca |
| Language: | Russian |
| Published: |
2020
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| Subjects: | European sprat, Fishing areas, Hydrometeorology, Sprat fisheries, Sea surface temperature, Fishing pressure, Commercial aggregations, Промысел шпрота, Черноморский шпрот, Температура поверхности воды, Промысловая нагрузка, Мониторинг рыболовства, Промысловые скопления, |
| Online Access: | http://hdl.handle.net/1834/17246 |
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| Summary: | This paper presents the results of monitoring of the European sprat fishing, carried out in April–October of 2019, which make it possible to characterize specific features of the variability of sea surface
temperature (SST), both seasonal and synoptic, as well as the behavior of the European sprat and the efficiency of its fishing. For this purpose, the daily SST maps of the Black and Azov Seas, created in the Hydrometeorological Center of Russia and based on the NCDC/NOAA (ESIMO Operational Module) data, and daily fishing information of the FSBI “Centre of Fishery Monitoring and Communications” have been used. The trends in the fishing pressure (daily catch) of each vessel and the average daily fishing pressure for the vessels in general have been investigated, and the information about the operation area of each vessel and SST in the main fishing areas has been collected. To study the changes of these parameters with time, mainly the methods of graphical analysis have been used. It is shown that the first period of relatively high density of sprat aggregations was noted at winter water temperatures, the second one coincided with a steady increase in SST, and the third period fell on the stabilization of summer temperature conditions. During this period, signs of a direct dependence of the sprat fishing efficiency on SST were revealed for the Caucasian fishing area and the South Coast of the Crimea; along the western coast of the Crimea, an inverse relation between them was found out. Effective fishing ceased after the SST decreased below 23.5 °C. |
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