Exact(1)
Given the potential for repeated contacts of populations from subregions during glacial expansions, it is possible that subregional populations merged into a common gene pool.
Similar(59)
The sensory drive hypothesis predicts that divergent sensory adaptation in different habitats may lead to premating isolation upon secondary contact of populations.
However, the genetically based differences which evolve in allopatry could be of particular importance in situations where species distribution ranges change, e.g. due to climate change, leading to secondary contact of populations.
Changes in mtDNA and the three nuclear loci are concordant across the contact zone, supporting that this is not a matter of primary contact and selection on some of the markers but rather of a secondary contact of populations from different refugia.
Canals connecting ancestral and novel drainages have further facilitated the dispersal and provided multiple opportunities for secondary contacts of zander populations (e.g. through the Elbe-Weser-Schifffahrtsweg, Mittellandkanal and Rhein-Main-Donau Kanal connecting different catchments in Germany).
During contact phases of populations reticulate events (i.e. introgressive hybridization) were highly likely, similar to ongoing hybridization, which is observed between East African baboon populations.
Zones of contact, consisting of populations of mixed ancestry, were observed between clades A and D on East and West Lewis Islands and between clades A and D and clades C and D on the Burrup Peninsula.
Also, the presence of L1c sub-lineages in the Hide (Cameroon; Chad Basin) compared with the rest of the populations indicate narrow contact of this population with Central African populations (including Pygmy populations), where this lineage is found with high frequency [7], [8], [16].
Furthermore, the proportion of self-referrals within the group of all patients who visited the three AEDs combined was derived from the contacts of the population of Velsen only.
Combined evidence for more substantial morphological divergence of BLUE and a lack of lineage-wide introgression between S-RED and BLUE [20], despite periods of secondary contact of neighbouring populations, is consistent with the suggestion that assortative female preference is more effective than post-mating isolation in maintaining morphological differentiation between divergent populations.
This date corresponds with the last more humid period, in which the contact of different populations in permanent rivers within the same river system appears likely.
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