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MEPS
Marine Ecology Progress Series

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MEPS 499:217-231 (2014)  -  DOI: https://doi.org/10.3354/meps10641

Long-term vicariance and post-glacial expansion in the Japanese rocky intertidal goby Chaenogobius annularis

Shotaro Hirase1,2,*, Minoru Ikeda1

1Integrative Aquatic Biology, Graduate School of Agricultural Science, Tohoku University, 1-1 Tsutsumidori-Amamiya, Sendai, Aoba, Miyagi 981-8555, Japan
2Present address: Genetic Research Section, Center for Earth Surface System Dynamics, Atmosphere and Ocean Research Institute, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277−8564, Japan
*Corresponding author:

ABSTRACT: Studies of mitochondrial DNA phylogeography of several Japanese coastal marine species have shown the existence of Pacific Ocean and Sea of Japan groups, which diverged because of the isolation of the Sea of Japan in the Pleistocene glacial periods. Here we performed a combined analysis of mitochondrial DNA (mtDNA) cytochrome b and 8 microsatellite loci among Chaenogobius annularis populations to reveal the levels of congruence between the 2 markers, the admixture of the 2 groups, and the post-glacial history of the Sea of Japan group. Population-level and individual-level genetic analyses based on these markers showed no or minimal admixtures between the Pacific Ocean and Sea of Japan groups, despite the temporal opening of the Sea of Japan in multiple interglacial periods. The genetic diversity within the Sea of Japan group was much lower than that within the Pacific Ocean group. However, the Shimonoseki population, sampled in southern parts of the Sea of Japan, revealed higher mitochondrial nucleotide diversity and microsatellite allelic richness, suggesting post-glacial expansion from the southern area, accompanied by genetic drift, i.e. the founder effect. Congruent patterns of mtDNA and microsatellite DNA markers suggest long-term vicariance and severe genetic drift in the Sea of Japan group since the divergence in the early Pleistocene.


KEY WORDS: Paleogeographical events · Phylogeography · Mitochodrial DNA · Microsatellite DNA · Japanese Archipelago · Sea of Japan · Glacial refugia


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Cite this article as: Hirase S, Ikeda M (2014) Long-term vicariance and post-glacial expansion in the Japanese rocky intertidal goby Chaenogobius annularis. Mar Ecol Prog Ser 499:217-231. https://doi.org/10.3354/meps10641

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