Abstract
We investigated the demographic history ofTrinorchestia longiramusJo, 1988 using the nucleotide sequence analysis of the mitochondrial cytochrome oxidase subunit I (COI) gene from 277 individuals collected from eight Korean populations. From the low haplotype diversity and nucleotide diversity in all populations, a neutrality test, and mismatch distribution analysis, the species appears to have recently experienced a prolonged or severe demographic bottleneck. Pairwise populationFSTestimates and AMOVA [= Analysis of Molecular Variance] results showed that substantial differentiation is present between the southern and eastern populations. The population structure ofT. longiramusmay have been influenced by glacial population extinctions and interglacial colonization during the Pleistocene ice-ages.
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