Sympatric speciation suggested by monophyly of crater lake cichlids View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1994-04

AUTHORS

U K Schliewen, D Tautz, S Pääbo

ABSTRACT

The existence of sympatric speciation--that populations diverge into species in the absence of physical or ecological barriers--is controversial. The East African Great Lakes harbour hundreds of cichlid species representing only a few monophyletic lineages, although palaeolimnological evidence and local restrictions on species distribution suggest that speciation in these lakes could have been allopatric. The case for sympatry in restricted areas of Lakes Malawi and Tanganyika is stronger but not unassailable. A better case might be made for cichlid species flocks in small, ecologically monotonous crater lakes. Here we present a mitochondrial DNA analysis of cichlid species flocks endemic to two such lakes in Cameroon. The results suggest that the flocks in each lake are monophyletic: the implication being that each lake was colonized once only, the size and shape of each lake being such that subsequent diversification would have been sympatric. More... »

PAGES

629-632

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/368629a0

DOI

http://dx.doi.org/10.1038/368629a0

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1037759569

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/8145848


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