Using sea surface temperature (SST) archive data from 2018–2023, reconstructed from AQUA and TERRA satellite data (MODIS spectroradiometer), with a spatial resolution of 1 km, obtained and processed at the Center for Collective Use of the Regional Satellite Monitoring of the Environment, Far Eastern Branch, Russian Academy of Sciences, the thermal and dynamic conditions of waters of the northwestern Sea of Japan are analyzed and the areas of longline (jigging) Pacific squid fishing in the Sea of Japan are examined. An analysis of satellite data has allowed us to identify elements of the thermal structure in the spatial distribution of SST, where Pacific squid fishing has been successful. The formation of squid fishing areas primarily depends on the development or weakening of branches of the Tsushima and Primorsky currents and the presence of mesoscale eddy structures in their waters. Squid aggregations are mostly confined to areas of eddy upwelling. Maximum catches are concentrated on the periphery of subtropical anticyclonic eddies bordering subarctic waters. If the eddy has a spiral structure, the aggregations are mostly concentrated in the center. If the inflow of subtropical waters takes the form of a mushroom-shaped current, then large catches are mainly observed in the current’s jet stream and in the zones of anticyclonic and cyclonic eddies of the dipole. In the frontal zone of subtropical and subarctic waters, squid fishing grounds are located on the warm side of the Subarctic (Polar) Front.
Nikitin et al. (Mon,) studied this question.