asymmetrical dispersal and putative isolation-by-distance of an intertidal blenniid across the atlantic–mediterranean divide

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ID: 132133
2017
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Abstract
Transition zones are of high evolutionary interest because unique patterns of spatial variation are often retained. Here, we investigated the phylogeography of the peacock blenny, Salaria pavo, a small marine intertidal fish that inhabits rocky habitats of the Mediterranean and the adjacent Atlantic Ocean. We screened 170 individuals using mitochondrial and nuclear sequence data from eight locations. Four models of genetic structure were tested: panmixia, isolation-by-distance, secondary contact and phylogeographic break. Results indicated clear asymmetric migration from the Mediterranean to the Atlantic but only marginally supported the isolation-by-distance model. Additionally, the species displays an imprint of demographic expansion compatible with the last glacial maximum. Although the existence of a refugium in the Mediterranean cannot be discarded, the ancestral lineage most likely originated in the Atlantic, where most of the genetic diversity occurs.
Reference Key
castilho2017peerjasymmetrical Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Rita Castilho;Regina L. Cunha;Cláudia Faria;Eva M. Velasco;Joana I. Robalo
Journal pediatrics
Year 2017
DOI
10.7717/peerj.3195
URL
https://peerj.com/articles/3195/
Keywords Keywords not found

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