Asymmetric reproductive barriers and mosaic reproductive isolation: insights from Misty lake-stream stickleback.

ABSTRACT: Ecological speciation seems to occur readily but is clearly not ubiquitous - and the relative contributions of different reproductive barriers remain unclear in most systems. We here investigate the potential importance of selection against migrants in lake/stream stickleback (Gasterosteus aculeatus) from the Misty Lake system, Canada. This system is of particular interest because one population contrast (Lake vs. Outlet stream) shows very low genetic and morphological divergence, whereas another population contrast (Lake vs. Inlet stream) shows dramatic genetic and morphological divergence apparently without strong and symmetric reproductive barriers. To test whether selection against migrants might solve this "conundrum of missing reproductive isolation", we performed a fully factorial r

SUBMITTER: Rasanen K 

PROVIDER: S-EPMC3997330 | biostudies-literature | 2014 Apr

REPOSITORIES: biostudies-literature