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Title
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Subtle population structure and male-biased dispersal in two **Copadichromis** species (Teleostei, Cichlidae) from Lake Malawi, East Africa
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Author
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Abstract
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| Various attributes of cichlid biology have been suggested to drive their propensity for rapid speciation, including population substructuring over short geographic distances. While this seems especially true for the rock-dwelling Mbuna species from Lake Malawi, the present study shows that geographic or habitat barriers are not sufficient to explain population substructuring in the less substrate-bound Utaka (non-Mbuna) species. We found similar levels of subtle population structure in the rock-dwelling Copadichromis quadrimaculatus and in the sand-dwelling C. sp. virginalis kajose (F ST < 0.01 in both species) without a discernable geographical pattern. We suggest that aspects of the reproductive strategy, by which seasonal aggregation alternates with more free-ranging stages, may facilitate the establishment of small population differences in Utaka. This hypothesis agrees with our finding that in these cichlids dispersal appears to be male biased. |
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Language
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English
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Source (journal)
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Hydrobiologia. - The Hague, 1948, currens
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Publication
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The Hague
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2008
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ISSN
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0018-8158
[print]
1573-5117
[online]
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DOI
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10.1007/S10750-008-9565-Z
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Volume/pages
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615
(2008)
, p. 69-79
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ISI
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000259909900007
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Full text (Publisher's DOI)
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