Low genetic and morphometric intraspecific divergence in peripheral copadichromis populations (perciformes: cichlidae) in the lake Malawi basin
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Published on: May 7, 2016
Dieter Anseeuw1, Joost A M Raeymaekers, Paul Busselen
1Interdisciplinary Research Centre, Katholieke Universiteit Leuven, Campus Kortrijk, Etienne Sabbelaan 53, 8500 Kortrijk, Belgium.
Abstract:
Peripheral isolated populations may undergo rapid divergence from the main population due to various factors such as a bottleneck or a founder effect followed by genetic drift or local selection pressures. Recent populations of two economically important Copadichromis species in Lake Malombe, a satellite lake of Lake Malawi, were neither genetically nor morphometrically distinct from their source populations in the main lake. Evidence was found for a founder effect which had a different impact on the genetic composition of the two species. In addition, the increased fishing pressure in Lake Malombe may have led to a reduction of the body sizes of both species.
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