Neotropical freshwater fishes (NFFs) constitute the most diverse continental vertebrate fauna
on Earth, with more than 6,200 named species compressed into an aquatic footprint< 0.5 …

Speciation is often thought of as a slow process due to the waiting times for mutations that
cause incompatibilities, and permit ecological differentiation or assortative mating. Cases of …

Genome-scale sequence data have invigorated the study of hybridization and introgression,
particularly in animals. However, outside of a few notable cases, we lack systematic tests for …

Adaptive radiation plays a fundamental role in our understanding of the evolutionary
process. However, the concept has provoked strong and differing opinions concerning its …

Speciation is the process by which barriers to gene flow evolve between populations.
Although we now know that speciation is largely driven by natural selection, knowledge of …

Adaptive radiations represent some of the most remarkable explosions of diversification
across the tree of life. However, the constraints to rapid diversification and how they are …

Understanding the molecular basis of repeatedly evolved phenotypes can yield key insights
into the evolutionary process. Quantifying gene flow between populations is especially …

The adaptive radiation of cichlid fishes in East African Lake Malawi encompasses over 500
species that are believed to have evolved within the last 800,000 years from a common …

As is true of virtually every realm of the biological sciences, our understanding of speciation
is increasingly informed by the genomic revolution of the past decade. Investigators can ask …

While it is appreciated that population size changes can impact patterns of deleterious
variation in natural populations, less attention has been paid to how gene flow affects and is …