Abstract
Based on materials of plankton surveying carried out in May–October 2008, the species composition, distribution, and density of pelagic larvae of bivalves of the Ussuriysky Bay (Peter the Great Bay, Sea of Japan) were studied. Larvae of 66 taxa were revealed and identified. The Bivalvia larvae occurred in the plankton during the entire period of study. Two areas, the inner and open part of the bay, which vary in the composition, concentration, and terms of larva occurrence in the plankton were distinguished. The larvae of Mytilus coruscus, Mactra chinensis, Modiolus kurilensis, Ruditapes philippinarum, Mya uzenensis and Teredo navalis were the most numerous and widespread. It was shown that despite high taxonomic diversity, the density of Bivalvia larvae in the Ussuriysky Bay was an order of magnitude lower, even in terms of their maximum number, than in other studied areas of the Peter the Great Bay.
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