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Two Genetic Lineages of Sea Slaters, Ligia (Crustacea: Isopoda) in South Korea: a Population Genetic Approach  

Jung, Jongwoo (School of Biological Sciences, Seoul National University)
Eo, Hae-Seok (School of Biological Sciences, Seoul National University)
Rho, Hyun Soo (Department of Biology, Korea Ocean Research and Development Institute)
Kim, Won (School of Biological Sciences, Seoul National University)
Publication Information
Molecules and Cells / v.25, no.4, 2008 , pp. 523-530 More about this Journal
Abstract
In this study, the species composition and population genetic properties of the sea slater, Ligia, in South Korea were investigated using mitochondrial and nuclear gene sequences. Two groups of sea slaters, genetically isolated from each other, a Western Group (WG) and an Eastern Group (EG) were identified. These groups exhibited considerable genetic divergence from Ligia exotica, previously recorded as a species inhabiting this country. These results indicate that there may be two species of Ligia in South Korea, but there is a small probability that both groups are L. exotica. A comparison of their genetic properties indicates that WG has a higher effective population size than EG, and that EG may have experienced a recent expansion, implying that it has a shorter history in South Korea than WG. These findings suggest that the South Korean sea slater populations may have been established as a result of several colonization events that can be traced on a continental scale by phylogeographic studies of sea slaters.
Keywords
16S rDNA; 18S rDNA; Ligia; Molecular Identification; Sea Slaters; South Korea;
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