The cost of DNA sequencing continues to fall, which makes it feasible to develop genomic
resources for new model species that are well suited for studying questions in evolutionary …

The polychromatic and trophically polymorphic Midas cichlid fish species complex
(Amphilophus cf. citrinellus) is an excellent model system for studying the mechanisms of …

The common name 'tilapia'refers to a group of tropical freshwater fish in the family Cichlidae
(Oreochromis, Tilapia, and Sarotherodon spp.) that are indigenous to Africa and the …

Sympatric speciation, the formation of species in the absence of geographical barriers,
remains one of the most contentious concepts in evolutionary biology. Although speciation …

Fundamental to understanding how biodiversity arises and adapts is whether evolution is
predictable in the face of stochastic genetic and demographic factors. Here we show rapid …

Cichlid fishes are known for their adaptive radiations with prolific speciation, but also for their
substantial intraspecific polymorphism and phenotypic plasticity. The Amphilophus …

It is still debated vigorously whether sexual selection can result in speciation without
physical barriers to gene flow. In this study, we used field data and molecular methods to …

A recent study of a pair of sympatric species of cichlids in Lake Apoyo in Nicaragua is
viewed as providing probably one of the most convincing examples of sympatric speciation …

Background After a volcano erupts, a lake may form in the cooled crater and become an
isolated aquatic ecosystem. This makes fishes in crater lakes informative for understanding …

Adaptive radiations are extremely useful to understand factors driving speciation. A
challenge in speciation research is to distinguish forces creating novelties and those …