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Hydrobiologia. 2019;832(1):93-103. doi: 10.1007/s10750-018-3752-3. Epub 2018 Sep 19.

Only true pelagics mix: comparative phylogeography of deepwater bathybatine cichlids from Lake Tanganyika.

Hydrobiologia

Stephan Koblmüller, Lukas Zangl, Christine Börger, Daniel Daill, Maarten P M Vanhove, Christian Sturmbauer, Kristina M Sefc

Affiliations

  1. 1Institute of Biology, University of Graz, Universitätsplatz 2, 8010 Graz, Austria.
  2. 2Institute of Vertebrate Biology, Academy of Sciences of the Czech Republic, Kv?tna 8, 603 65 Brno, Czech Republic.
  3. Consultants in Aquatic Ecology and Engineering - blattfisch e.U., Gabelsbergerstraße 7, 4600 Wels, Austria.
  4. 4Department of Botany and Zoology, Faculty of Science, Masaryk University, Kotlá?ská 2, 611 34 Brno, Czech Republic.
  5. 5Research Group Zoology: Biodiversity & Toxicology, Centre for Environmental Sciences, Hasselt University, Agoralaan Gebouw D, 3590 Diepenbeek, Belgium.
  6. 6Zoology Unit, Finnish Museum of Natural History, University of Helsinki, P.O. Box 17, 00014 Helsinki, Finland.
  7. 7Laboratory of Biodiversity and Evolutionary Genomics, Department of Biology, University of Leuven, Ch. Deberiotstraat 32, 3000 Louvain, Belgium.

PMID: 30880831 PMCID: PMC6394743 DOI: 10.1007/s10750-018-3752-3

Abstract

In the absence of dispersal barriers, species with great dispersal ability are expected to show little, if at all, phylogeographic structure. The East African Great Lakes and their diverse fish faunas provide opportunities to test this hypothesis in pelagic fishes, which are presumed to be highly mobile and unrestricted in their movement by physical barriers. Here, we address the link between panmixis and pelagic habitat use by comparing the phylogeographic structure among four deepwater cichlid species of the tribe Bathybatini from Lake Tanganyika. We show that the mitochondrial genealogies (based on the most variable part or the control region) of the four species are very shallow (0.8-4% intraspecific divergence across entire distribution ranges) and that all species experienced recent population growth. A lack of phylogeographic structure in the two eupelagic species,

Keywords: Bathybates; Cichlidae; Hemibates; Panmixis; Pelagic fishes; Phylogeography

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