Ecologically mediated selection against hybrids, caused by hybrid phenotypes fitting poorly
into available niches, is typically viewed as distinct from selection caused by epistatic …

A major goal of evolutionary biology is to identify the genotypes and phenotypes that
underlie adaptation to divergent environments. Stickleback fish, including the threespine …

Social organisation in animals takes many forms. It includes assemblages of territorial
animals, dominance hierarchies and social groups, among other things. The basic tenet that …

Ecological speciation is the process by which reproductively isolated populations emerge as
a consequence of divergent natural or ecologically-mediated sexual selection. Most …

Changes in bone size and shape are defining features of many vertebrates. Here we use
genetic crosses and comparative genomics to identify specific regulatory DNA alterations …

Mutations of small effect underlie most adaptation to new environments, but beneficial
variants with large fitness effects are expected to contribute under certain conditions. Genes …

Understanding the genetic architecture of evolutionary change remains a long-standing goal
in biology. In vertebrates, skeletal evolution has contributed greatly to adaptation in body …

Marine populations of the threespine stickleback (Gasterosteus aculeatus) have repeatedly
colonized and rapidly adapted to freshwater habitats, providing a powerful system to map …

Although descriptions of striking diversity in animal behavior are plentiful, little is known
about the mechanisms by which behaviors change and evolve between groups. To fully …

A substantial part of biodiversity is thought to have arisen from adaptive radiations in which
one lineage rapidly diversified into multiple lineages specialized to many different niches …