The extraordinary species richness of freshwater fishes has attracted much research on
mechanisms and modes of speciation. We here review research on speciation in freshwater …

The tenet that ecological opportunity drives adaptive diversification has been central to
theories of speciation since Darwin, yet no widely accepted definition or mechanistic …

Speciation is a multifaceted process that involves numerous aspects of the biological
sciences and occurs for multiple reasons. Ecology plays a major role, including both abiotic …

The field of speciation has seen much renewed interest in the past few years, with
theoretical and empirical advances that have moved it from a descriptive field to a predictive …

A longstanding hypothesis in evolutionary biology is that trade-offs between natural and
sexual selection often underlie the diversification of sexual signals in the wild. A classic …

The study of male genital diversity has long overshadowed evolutionary inquiry of female
genitalia, despite its nontrivial diversity. Here, we identify four nonmutually exclusive …

Sexual signal evolution can be complex because multiple factors influence the production,
transmission, and reception of sexual signals, as well as receivers' responses to them. To …

Many animals show complex behaviours that can have important ecological and
evolutionary consequences. Environmental variation can lead to divergent selection that …

Chemical signals in insects have been documented to play an important role in mate
recognition, and divergence in chemical signals can often cause sexual isolation between …

Relatedness strongly influences social behaviors in a wide variety of species. For most
species, the highest typical degree of relatedness is between full siblings with 50% shared …