Data from: Evolution of body shape in sympatric versus non-sympatric Tropheus populations of Lake Tanganyika

Michaela Kerschbaumer, Philipp Mitteroecker & Christian Sturmbauer
Allopatric speciation often yields ecologically equivalent sister species, so that their secondary admixis enforces competition. The shores of Lake Tanganyika harbor about 120 distinct populations of the cichlid genus Tropheus, but only some are sympatric. When alone, Tropheus occupies a relatively broad depth zone, but in sympatry, fish segregate by depth. To assess the effects of competition, we studied the partial co-occurrence of Tropheus moorii ‘Kaiser’ and ‘Kirschfleck’ with Tropheus polli. A previous study demonstrated...
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