Ichthyological Research

, Volume 54, Issue 3, pp 253–261 | Cite as

Comparative phylogeography of bagrid catfishes in Taiwan

  • Katsutoshi Watanabe
  • Nian-Hong Jang-Liaw
  • Chun-Guang Zhang
  • Sang-Rin Jeon
  • Mutsumi Nishida
FULL PAPER

Abstract

A phylogeographic analysis of two bagrid catfishes in Taiwan was conducted using sequence data from a portion of the mitochondrial DNA (mtDNA) control region. For Pseudobagrus brevianalis, which is most probably endemic to Taiwan, a total of eight haplotypes were detected in 189 specimens from nine river systems covering its entire distribution range, from northern to central western areas of the island. Obvious genetic differentiation was observed among its populations (average FST = 0.753); in particular, the northernmost Tamsui River population was fixed for a single endemic haplotype. Nested clade phylogeographic analysis (NCPA) indicated that the dispersal center of mtDNA was the area around the Touchien River and Holong River, north to the Miaoli Plateau, in northwestern Taiwan, suggesting both northward and southward dispersal in this species. There was no evidence for the validity of P. taiwanensis, the nominal species described from Taiwan, morphologically similar to P. brevianalis. We confirmed that P. adiposalis was distributed discontinuously in three river systems; analysis of 42 specimens from the rivers indicated a total of four haplotypes and population differentiation (average FST = 0.876). Fixation into a largely differentiated haplotype in the northernmost Tamsui River population was also found in this species, but different processes for this phylogeographic pattern were implied for the two species. Comparison with P. ussuriensis, a widespread continental species morphologically similar to P. adiposalis, suggested the possibility that P. adiposalis is a group of local populations of P. ussuriensis in Taiwan. Two migration routes vs. random fixation scenarios for the population structure of P. adiposalis are discussed with information on other fishes and the geological history of the island.

Key words

Control region mtDNA Pseudobagrus adiposalis Pseudobagrus brevianalis Pseudobagrus ussuriensis 

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Copyright information

© The Ichthyological Society of Japan 2007

Authors and Affiliations

  • Katsutoshi Watanabe
    • 1
  • Nian-Hong Jang-Liaw
    • 2
  • Chun-Guang Zhang
    • 3
  • Sang-Rin Jeon
    • 4
  • Mutsumi Nishida
    • 5
  1. 1.Department of Zoology, Division of Biological ScienceGraduate School of Science, Kyoto UniversityKyotoJapan
  2. 2.Department of ZoologyNational Museum of Natural ScienceTaichungTaiwan
  3. 3.Institute of ZoologyChinese Academy of SciencesBeijingP.R. China
  4. 4.Department of BiologyCollege of Natural Sciences, Sang Myung UniversitySeoulKorea
  5. 5.Ocean Research InstituteThe University of TokyoTokyoJapan

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