Abstract
For the first time, year round and long-term seasonal research on the composition, phenology, and population dynamics of pelagic larvae of bottom invertebrates were conducted in the Vostok Bay of the Sea of Japan. Larvae of 98 taxa of various ranks were found. The larvae of bivalves and polychaetes were the most diverse. The larvae of bottom invertebrates occurred in plankton year-round. Their density was at its minimum in January (less than 100 ind./m3), and its maximum from June to November (more than 1000 ind./m3). The larvae of polychaetes dominated in the autumn and winter seasons, whereas bivalve and gastropod larvae dominated in the spring and summer seasons. It was shown that the proportion of pollution tolerant meroplankton larvae of the Polydora and Pseudopolydora genera was high in the Vostok Bay, and could indirectly indicate increasing anthropogenic pressure in the area.
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