HIGHLIGHTS
SUMMARY
When populations come into secondary contact before reproductive isolation is complete, hybridization-interbreeding-is likely to occur (Abbott et_al, 2013; Brandler et_al, 2021). The consequences of hybridization depend on various factors, such as habitat properties, hybrid fitness, frequency of assortative mating, and backcrossings (Arnold, 1997; Cortés-Ortiz et_al, 2019; den Hartog et_al, 2007; Stebbins, 1959; Zinner et_al, 2011). If hybrids exhibit fitness similar to or even better than the original species but mainly breed assortatively without crossing back, they may establish as a third species ("hybrid speciation") and coexist with both parent taxa . . .
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