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Abstract <p>Seasonal bathymetric movements of fish in the subarctic waters of the Far Eastern seas have a significant impact on the distribution of all fish and make important changes in the structure of the species composition of the ichthyofauna on the shelf and continental slope. The purpose of this work was to determine the vertical structure of bathymetrical communities of fish in the Pacific waters of the northern Kuril Islands and its seasonal changes. The main material for the article was the data collected during trawl surveys in the period 1987–2021. It is shown that the boundary between the elittoral and mesobenthal communities in the cold season of the year was in nearly 350 m, in the warm period of the year it shifted to a depth of 100 m. The new information makes it possible to assess the characteristic features of elittoral and mesobenthal communities and seasonal changes in the intermediate boundaries between them and clarifies the scale of migration processes during annual life cycle of fish in the area.</p>

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Vertical Structure of the Fish Community in the Pacific Zone near the Northern Kuril Islands

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • Kim Sen Tok

摘要

Abstract

Seasonal bathymetric movements of fish in the subarctic waters of the Far Eastern seas have a significant impact on the distribution of all fish and make important changes in the structure of the species composition of the ichthyofauna on the shelf and continental slope. The purpose of this work was to determine the vertical structure of bathymetrical communities of fish in the Pacific waters of the northern Kuril Islands and its seasonal changes. The main material for the article was the data collected during trawl surveys in the period 1987–2021. It is shown that the boundary between the elittoral and mesobenthal communities in the cold season of the year was in nearly 350 m, in the warm period of the year it shifted to a depth of 100 m. The new information makes it possible to assess the characteristic features of elittoral and mesobenthal communities and seasonal changes in the intermediate boundaries between them and clarifies the scale of migration processes during annual life cycle of fish in the area.