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

Melisa Olave, Alexander Nater, Andreas F. Kautt and Axel Meyer ()
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Melisa Olave: University of Konstanz
Alexander Nater: University of Konstanz
Andreas F. Kautt: University of Konstanz
Axel Meyer: University of Konstanz

Nature Communications, 2022, vol. 13, issue 1, 1-9

Abstract: Abstract 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.

Date: 2022
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DOI: 10.1038/s41467-022-33319-4

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