Open AccessPatterns and processes in the evolutionary history of parrotfishes (Family Labridae)
Author(s) -
Choat John. H.,
klanten Oya. S.,
Herwerden Lynne,
Robertson D. Ross,
Clements Kendall D.
Publication year - 2012
Publication title -
biological journal of the linnean society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.906
H-Index - 112
eISSN - 1095-8312
pISSN - 0024-4066
DOI - 10.1111/j.1095-8312.2012.01959.x
Subject(s) - allopatric speciation , biology , sympatric speciation , sympatry , ecology , adaptive radiation , evolutionary biology , monophyly , genetic divergence , zoology , parapatric speciation , clade , phylogenetics , population , genetic variation , genetic diversity , gene flow , genetics , demography , sociology , gene
Phylogenetic reconstruction of the evolutionary relationships among 61 of the 70 species of the parrotfish genera C hlorurus and S carus ( F amily L abridae) based on mitochondrial and nuclear gene sequences retrieved 15 well‐supported clades with mid P liocene/ P leistocene diversification. Twenty‐two reciprocally monophyletic sister‐species pairs were identified: 64% were allopatric, and the remainder were sympatric. Age of divergence was similar for allopatric and sympatric species pairs. Sympatric sister pairs displayed greater divergence in morphology, ecology, and sexually dimorphic colour patterns than did allopatric pairs, suggesting that both genetic drift in allopatric species pairs and ecologically adaptive divergence between members of sympatric pairs have played a role in diversification. Basal species typically have small geographical ranges and are restricted to geographically and ecologically peripheral reef habitats. We found little evidence that a single dominant process has driven diversification, nor did we detect a pattern of discrete, sequential stages of diversification in relation to habitat, ecology, and reproductive biology. The evolution of C hlorurus and S carus has been complex, involving a number of speciation processes. © 2012 The Linnean Society of London, Biological Journal of the Linnean Society , 2012, 107 , 529–557.