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Population differentiation in the swordtail characin (Corynopoma riisei ): a role for sensory drive?
 

Summary: Population differentiation in the swordtail characin
(Corynopoma riisei ): a role for sensory drive?
G. ARNQVIST & N. KOLM
Department of Ecology & Evolution, Animal Ecology, Uppsala University, Uppsala, Sweden
Introduction
Sexual selection by mate choice is a potent evolutionary
generator of reproductive isolation. This is so partly
because it acts on traits involved in reproduction (e.g.,
Coyne & Orr, 2004) but also because it efficiently
generates linkage disequilibrium across loci (Kirkpatrick
& Ravigne´, 2002), and is thus often considered an
important engine of incipient speciation (Panhuis et al.,
2001). Yet our understanding of if and why sexual
selection is divergent in allopatric populations of any
given species is very limited. One possibility is that
evolutionary trajectories may come to differ during
population differentiation as a result of largely random
events, because of the arbitrary nature of certain forms
of sexual selection (Lande, 1981; Arak & Enquist, 1993,
1995; Schluter & Price, 1993). However, the efficacy of

  

Source: Arnqvist, Göran - Department of Animal Ecology, Uppsala Universitet

 

Collections: Environmental Sciences and Ecology