Sexual selection has the potential to decrease mean fitness in a population through an array
of costs to nonsexual fitness. These costs may be offset when sexual selection favors …

Accurately determining avian species limits has been a challenge and a work in progress for
most of a century. It is a fascinating but difficult problem. Under the biological species …

Understanding the processes of population divergence and speciation remains a core
question in evolutionary biology. For nearly a hundred years evolutionary geneticists have …

Partial prezygotic isolation is often viewed as more important than partial postzygotic
isolation (low fitness of hybrids) early in the process of speciation. I simulate secondary …

When divergent populations are connected by gene flow, the establishment of complete
reproductive isolation usually requires the joint action of multiple barrier effects. One …

Despite the important roles of assortative mating for understanding evolutionary processes,
our knowledge on the variation in assortative mating across populations and breeding …

Colour polymorphism is a widespread phenomenon in natural populations of several
species. In particular, it is especially common on marine gastropod species from the genus …

Upon the secondary contact of populations, speciation with gene flow is greatly facilitated
when the same pleiotropic loci are both subject to divergent ecological selection and induce …

While numerous theoretical population genetic models predict that mating assortatively by
genetic 'quality'will enhance the efficiency of purging of deleterious mutations and/or the …

Both assortment and plasticity can facilitate social evolution, as each may generate heritable
associations between the phenotypes and fitness of individuals and their social partners …