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작성일 : 2020-03-10
작성자 : 김진구
The genusTakifugu comprises approximately 25 speciesthat are closely related due to fairly recent speciation in the northwesternPacific. The variety of coloration patterns within Takifugu has led to taxonomic confusion. A recent study treated Takifugu niphobles (Jordan and Snyder, 1901)as a junior synonym of Takifugu alboplumbeus(Richardson, 1845) based on morphological comparison of the type specimens. Inan attempt to review the taxonomic status of grass puffer at a molecular level,209 individuals from nine localities in the northwestern Pacific (twolocalities in the East Sea, five in the Korea Strait, and two in the Yellow Sea)were analyzed using mitochondrial DNA (mtDNA) and microsatellites. The mtDNA sequenceanalyses showed two distinct lineages (Kimura-two-parameter distance=1.5–2.6%and 2.2–3.6% in cytochrome c oxidase subunit I and cytochrome b, respectively).The distributions of the two lineages tended to be separated; lineage 1 waslocated in the East Sea and lineage 2 in the Yellow Sea, but both lineages in theKorea Strait. STRUCTURE analyses using 13 microsatellite markers showed two distinctgroups, which was consistent with the two subdivisions in mtDNA, except for thewestern Korea Strait. Our findings suggest that T. niphobles is a distinct species differing from T. alboplumbeus, unlike previous study. Thisrequires further careful taxonomic revision.