title: Evolutionary biology: evidence for sympatric speciation?
abstract: Sympatric speciation is difficult to demonstrate in nature and remains a hotly debated issue. Barluenga et al. present a case of putative sympatric speciation for two cichlid species in the Nicaraguan crater lake Apoyo, but they overlook or reinterpret some key published information on the system. Although sympatric speciation is possible in theory, we show here that, when this information is taken into account, the results of Barluenga et al. do not provide conclusive evidence for sympatric speciation: this is because the null hypothesis of multiple invasion with introgression cannot be rejected.
authors.affiliation: Bavarian State Collection of Zoology, 81247 München, Germany. schliewen@zsm.mwn.de
authors.forename: U K
authors.initials: UK
authors.lastname: Schliewen
authors.forename: T D
authors.initials: TD
authors.lastname: Kocher
authors.forename: K R
authors.initials: KR
authors.lastname: McKaye
authors.forename: O
authors.initials: O
authors.lastname: Seehausen
authors.forename: D
authors.initials: D
authors.lastname: Tautz
mesh_terms: D000818:Animals; D005075:Biological Evolution; D023681:Cichlids / Q000145:classification / Q000235:genetics* / Q000502:physiology*; D004272:DNA, Mitochondrial / Q000235:genetics; D005618:Fresh Water; D049810:Genetic Speciation; D006239:Haplotypes / Q000235:genetics; D008954:Models, Biological; D009527:Nicaragua; D010802:Phylogeny; D015203:Reproducibility of Results; D013045:Species Specificity
chemical_list: D004272:DNA, Mitochondrial