Early stages of sympatric homoploid hybrid speciation in crater lake cichlid fishes

• Autores: Olave, Melisa; Nater, Alexander; Kautt, Andreas F.; Meyer, Axel
• Año de publicación: 2022
• Idioma: inglés
• Tipo de recurso: artículo
• Materia: hybrid speciation; sympatry; genomics; cichlids
• Institución: Consejo Nacional de Investigaciones Científicas y Técnicas

Homoploid hybrid speciation (i.e., hybrid speciation without a change in ploidy) has traditionally been considered to be rare in animals. Only few accepted empirical examples of homoploid hybrid speciation in nature exist, and in only one previous case (insects) was it convincingly shown that this process occurred in complete sympatry. Here, we report an instance of sympatric homoploid hybrid speciation in Midas cichlid fishes in Crater Lake Xiloá, Nicaragua. The hybrid lineage, albeit at an early stage of speciation, has genomically and phenotypically diverged from both of its two parental species. Together with a distinct stable isotope signature this suggests that this hybrid lineages occupies a different trophic niche compared to the other sympatric Midas cichlid species in Crater Lake Xiloá.
Fil: Olave, Melisa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Provincia de Mendoza. Instituto Argentino de Investigaciones de las Zonas Áridas. Universidad Nacional de Cuyo. Instituto Argentino de Investigaciones de las Zonas Áridas; Argentina
Fil: Nater, Alexander. University of Bern; Suiza
Fil: Kautt, Andreas F.. Harvard University; Estados Unidos
Fil: Meyer, Axel. University Of Konstanz (university Of Konstanz);