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

0502817 - ÚBO 2020 RIV NL eng J - Článek v odborném periodiku
Koblmüller, Stephan - Zangl, L. - Börger, C. - Daill, D. - Vanhove, M. P. M. - Sturmbauer, C. - Sefc, K. M.
Only true pelagics mix: comparative phylogeography of deepwater bathybatine cichlids from Lake Tanganyika.
Hydrobiologia. Roč. 832, č. 1 (2019), s. 93-103. ISSN 0018-8158. E-ISSN 1573-5117
Grant CEP: GA MŠMT LH15175
Institucionální podpora: RVO:68081766
Klíčová slova: Cichlidae * Bathybates * Hemibates * Panmixis * Pelagic fishes * Phylogeography
Obor OECD: Marine biology, freshwater biology, limnology
Impakt faktor: 2.385, rok: 2019
Způsob publikování: Open access
http://dx.doi.org/10.1007/s10750-018-3752-3

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, Bathybates fasciatus and B. leo, was consistent with expectations and with findings in other pelagic cichlid species. Contrary to expectations, a clear phylogeographic structure was detected in the two benthopelagic species, B. graueri and Hemibates stenosoma. Differences in genetic diversity between eupelagic and benthopelagic species may be due to differences in their dispersal propensity, mediated by their respective predatory niches, rather than precipitated by external barriers to dispersal.
Trvalý link: http://hdl.handle.net/11104/0294703