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Marine Biodiversity

, Volume 49, Issue 1, pp 501–504 | Cite as

Tsugaru Strait hybrid zone between two Japanese marine sculpins (genus Cottiusculus)

  • Yoshiaki KaiEmail author
  • Tomoyuki Yamanaka
Short Communication

Abstract

Mitochondrial and nuclear DNA variations in the marine sculpin sister species Cottiusculus schmidti and C. nihonkaiensis, distributed along the Pacific coast of northern Japan and in the Sea of Japan, respectively, indicated a ca. 250-km-wide hybrid zone across the Tsugaru Strait, connecting the Pacific Ocean and Sea of Japan. In addition to incomplete postzygotic isolation between the two species, the hybrid zone may have been shaped and formed by reduced dispersal, the preferred habitat of Cottiusculus being generally deeper than Tsugaru Strait (maximum depth ca. 140 m).

Keywords

Cottiusculus schmidti Cottiusculus nihonkaiensis Mitochondrial DNA Cyt-b Nuclear DNA myh6 

Notes

Acknowledgements

We greatly appreciate the assistance of Y.Yagi (Japan Sea National Fisheries Research Institute), A. Yamasaki, A. Iwao, T. Miyajima and S. Noguchi and the crews of the R/V Heian-maru (Kyoto Prefectural Agriculture, Forestry and Fisheries Technology Center), K. Itoh, T. Miura and the crews of the crews of the R/V Seiho-maru (Aomori Prefectural Industrial Technology Center), and K. Sakai (Noto Marine Center, Ishikawa) in collecting specimens. We also thank G. S. Hardy (Ngunguru, New Zealand) for his critical reading of the manuscript. This study was supported in part by a grant-in-aid for scientific research (C) from JSPS (26440212).

Supplementary material

12526_2017_771_MOESM1_ESM.xlsx (18 kb)
Table S1 (XLSX 18 kb)
12526_2017_771_MOESM2_ESM.pdf (943 kb)
Figure S1 (PDF 943 kb)

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Copyright information

© Senckenberg Gesellschaft für Naturforschung and Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  1. 1.Maizuru Fisheries Research Station, Field Science Education and Research CenterKyoto UniversityKyotoJapan
  2. 2.Research Institute of Environment, Agriculture and FisheriesOsakaJapan

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