Title
Subtle population structure and male-biased dispersal in two **Copadichromis** species (Teleostei, Cichlidae) from Lake Malawi, East Africa Subtle population structure and male-biased dispersal in two **Copadichromis** species (Teleostei, Cichlidae) from Lake Malawi, East Africa
Author
Faculty/Department
Faculty of Sciences. Biology
Publication type
article
Publication
The Hague ,
Subject
Biology
Source (journal)
Hydrobiologia. - The Hague
Volume/pages
615(2008) , p. 69-79
ISSN
0018-8158
ISI
000259909900007
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
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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