Sympatric speciation in Nicaraguan crater lake cichlid fish (original) (raw)

Nature volume 439, pages 719–723 (2006)Cite this article

Abstract

Sympatric speciation, the formation of species in the absence of geographical barriers, remains one of the most contentious concepts in evolutionary biology. Although speciation under sympatric conditions seems theoretically possible1,2,3,4,5, empirical studies are scarce and only a few credible examples of sympatric speciation exist6. Here we present a convincing case of sympatric speciation in the Midas cichlid species complex (Amphilophus sp.) in a young and small volcanic crater lake in Nicaragua. Our study includes phylogeographic, population-genetic (based on mitochondrial DNA, microsatellites and amplified fragment length polymorphisms), morphometric and ecological analyses. We find, first, that crater Lake Apoyo was seeded only once by the ancestral high-bodied benthic species Amphilophus citrinellus, the most common cichlid species in the area; second, that a new elongated limnetic species (Amphilophus zaliosus) evolved in Lake Apoyo from the ancestral species (A. citrinellus) within less than ∼10,000 yr; third, that the two species in Lake Apoyo are reproductively isolated; and fourth, that the two species are eco-morphologically distinct.

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Acknowledgements

We thank the Ministry of Natural Resources (MARENA) in Nicaragua for collection permits; Z. Pérez for support in the field; C. Chang-Rudolf, K. Hofmann, Y. Chiari and N. Feiner for technical assistance in the laboratory; and S. Gavrilets, T. Price and E. B. Taylor for comments on the manuscript. This work was funded by the Deutsche Forschungsgemeinschaft priority program 1127 (‘Adaptive radiations’).

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Author notes

  1. Marta Barluenga, Kai N. Stölting and Walter Salzburger: *These authors contributed equally to this work

Authors and Affiliations

  1. Lehrstuhl für Zoologie und Evolutionsbiologie, Department of Biology, University of Konstanz, Universitätsstrasse 10, 78457, Konstanz, Germany
    Marta Barluenga, Kai N. Stölting, Walter Salzburger, Moritz Muschick & Axel Meyer
  2. Center for Junior Research Fellows, University of Konstanz, Universitätsstrasse 10, 78457, Konstanz, Germany
    Walter Salzburger

Authors

  1. Marta Barluenga
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  2. Kai N. Stölting
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  3. Walter Salzburger
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  4. Moritz Muschick
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  5. Axel Meyer
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Corresponding author

Correspondence toAxel Meyer.

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Competing interests

GenBank accession numbers for all mitochondrial control region sequences can be found in Supplementary Table 1. Reprints and permissions information is available at npg.nature.com/reprintsandpermissions. The authors declare no competing financial interests.

Supplementary information

Supplementary Table 1

List of species, sample number, geographic origin for the Lake Apoyo fish, sampling localities, GenBank accession numbers of mitochondrial control region sequences, and haplotype numbers. Species Specimen ID Lake Locality Accesion No. Haplotype. (PDF 87 kb)

Supplementary Table 2

Mismatch analysis parameters. (PDF 2116 kb)

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Barluenga, M., Stölting, K., Salzburger, W. et al. Sympatric speciation in Nicaraguan crater lake cichlid fish.Nature 439, 719–723 (2006). https://doi.org/10.1038/nature04325

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Editorial Summary

Going it alone, together

One of the hottest controversies in evolutionary biology is sympatric speciation, the formation of new species in the absence of geographical boundaries. The controversy is about whether it happens or not: it ‘should’ in theory but it is difficult to prove it. Two new examples of the phenomenon are reported this week, one in fish and one (online) in plants, convincing evidence that as Darwin suggested, sympatric speciation is likely to be common. The fishy example is the formation of Amphilophus zaliosus from A. citrinellus in a volcanic crater lake in Nicaragua. And in plants, the curly palm Howea belmoreana and the thatch palm H. forsteriana diverged on Lord Howe Island, a volcanic island 480 km east of Australia in the Tasman Sea.