Phylogeographic structure, demographic history and morph composition in a colour polymorphic lizard
CA McLean, D Stuart-Fox, A Moussalli
Journal of Evolutionary Biology | Wiley | Published : 2014
In polymorphic species, population divergence in morph composition and frequency has the potential to promote speciation. We assessed the relationship between geographic variation in male throat colour polymorphism and phylogeographic structure in the tawny dragon lizard, Ctenophorus decresii. We identified four genetically distinct lineages, corresponding to two polymorphic lineages in the Northern Flinders Ranges and Southern Flinders Ranges/Olary Ranges regions respectively, and a monomorphic lineage in the Mt Lofty Ranges/Kangaroo Island region. The degree of divergence between these three lineages was consistent with isolation to multiple refugia during Pleistocene glacial cycles, where..View full abstract
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Awarded by Australian Research Council
We thank M. Fiedel, T. McLean, S. Sass, B. Turffs, A. Elliott and D. Abdul-Rahman for assistance in the field. We are grateful to P. Watkins, L. and R. Khoe, D. and C. Langford, M. Sprigg, and S. Steiner and the Warrioota Trust for their hospitality. We thank the South Australian Museum and Australian Museum for providing tissue samples. B. Sinervo, A. Goncalves Da Silva, R. Fuller, K. Pfennig and two anonymous reviewers provided helpful feedback on an earlier version of the manuscript. Research protocols were reviewed and approved by the University of Melbourne Animal Ethics Committee (1011760.1), South Australian Wildlife Ethics Committee (18/2010), and New South Wales Animal Care and Ethics Committee (09/2596). Permits to conduct field work were obtained from the South Australia Department of Environment, Water and Natural Resources (E25861-1, 15/0231) and the New South Wales National Parks and Wildlife Service (SL100110). Funding for this work was provided by the Australian Research Council to DS-F (DP1092908), and Nature Foundation South Australia and the Holsworth Wildlife Research Endowment to CM.