Mating preferences, sexual selection and patterns of cladogenesis in ray-finned fishes
2007 (English)In: Journal of Evolutionary Biology, ISSN 1010-061X, E-ISSN 1420-9101, Vol. 20, no 2, 597-602 p.Article in journal (Refereed) Published
Evolutionary theory predicts that sexual selection may increase taxonomic diversity when emergent mating preferences result in reproductive isolation and therefore speciation. This theory has been invoked to explain patterns of diversity in ray-finned fishes (most notably in the cichlids), but the theory has not been tested comparatively in fish. Additionally, several other unrelated factors have been identified as promoters of cladogenesis, so it is unclear how important sexual selection might be in diversification. Using sister-clade analysis, I tested the relationship between the presence of sexually selected traits and taxonomic diversification in actinopterygiian fishes, a large clade that shows substantial diversity in mating preferences and related sexually selected traits. In all identified sister-families that differed with regard to the proportion of species manifesting sexually selected traits, sexual selection was correlated with increased diversification, and this association was significant across all sister clades (P = 0.02). This suggests that sexual selection, when present, is a substantial driver of diversification in the ray-finned fishes, and lends further empirical support to the theoretical link between mating preferences and accelerated cladogenesis.
Place, publisher, year, edition, pages
2007. Vol. 20, no 2, 597-602 p.
prezygotic isolation, sister-clade comparisons, taxonomic diversity
IdentifiersURN: urn:nbn:se:uu:diva-145902DOI: 10.1111/j.1420-9101.2006.01251.xISI: 000244244300019OAI: oai:DiVA.org:uu-145902DiVA: diva2:397807