• Korean Journal of Environmental Biology
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• v.37 no.3
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• pp.351-361
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• 2019

To investigate the temporal distribution of planktonic larvae of Tegillarca granosa and Anadara kagoshimensis in the Boseong coastal waters of South Korea, samples of planktonic bivalve larvae were taken from the coastal waters from June to September 2018 (this consisted of monthly sampling in June, July, and September with three- or four-day interval sampling in August). The samples were analyzed using metagenomic next-generation sequencing methods (target gene: mitochondria cytochrome c oxidase 1 region). In this study, a total of 21 bivalve operational taxonomic units (OTUs) were detected with the most abundant bivalve OTUs (relative mean abundance >1%) belonging to Magallana sikamea, Xenostrobus atratus, Musculista senhousia, Magallana gigas, Sinonovacula constricta, Anadara kagoshimensis, Kurtiella aff. bidentata, and Tegillarca granosa. In particular, Tegillarca granosa and Anadara kagoshimensis (the main fishery resources on the Boseong coast) accounted for 0.51-12.50% (average 4.00%) and 0.01-12.50% (1.92%), respectively. The planktonic bivalve larvae were most abundant from July to August. Anadara kagoshimensis was most abundant in early August but rare in the other investigated periods, whereas Tegillarca granosa was more abundant in late August. Bivalve larvae monitoring is important to predict the production of bivalve fisheries. Therefore, intensive monitoring is needed to understand the changes in planktonic bivalve larvae because potentially rapid turnover can respond to the ecological interaction of spawning bivalves.