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Comparisons of the genetic structure of Squalius populations (Teleostei, Cyprinidae) from rivers with contrasting histories, drainage areas and climatic conditions based on two molecular markers

dc.contributor.authorAlmada, Vítor Carvalho
dc.contributor.authorSantos, Carla Sousa
dc.date.accessioned2012-05-12T11:33:05Z
dc.date.available2012-05-12T11:33:05Z
dc.date.issued2010
dc.description.abstractThe genetic structure of Squalius populations from Portuguese Atlantic- and Mediterranean-type streams (assigned to six distinct morphoclimatic regions) was compared using sequences of the cytb and betaactin genes. The drainage area was significantly correlated to all the genetic diversity indices, pointing to the need to control for this effect in comparing populations with different histories and paleoecologies. A significant correlation was also found between genetic diversity and the morphoclimatic regions to which the rivers were assigned, with the highest diversity in warmer, lower latitude, Mediterranean-type streams. This relationship was not due to idiosyncratic characteristics of the clades compared. When the drainage area and phylogenetic effects were removed, the southern Mediterranean streams harboured significantly more genetic diversity even when compared with much larger northern streams. It is argued that these results are likely caused both by the metapopulation structure of the Mediterranean streams and by the severe reduction or local extinction of populations in the northern rivers during glaciations.por
dc.identifier.citationMolecular Phylogenetics and Evolution, 57, 924-931por
dc.identifier.doi10.1016/j.ympev.2010.08.015
dc.identifier.issn1055-7903
dc.identifier.urihttp://hdl.handle.net/10400.12/1378
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevierpor
dc.subjectCyprinidaepor
dc.subjectMediterraneanpor
dc.subjectIberian Peninsulapor
dc.subjectGlacial refugiapor
dc.subjectMetapopulationspor
dc.subjectFreshwater fishpor
dc.titleComparisons of the genetic structure of Squalius populations (Teleostei, Cyprinidae) from rivers with contrasting histories, drainage areas and climatic conditions based on two molecular markerspor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceAmsterdampor
oaire.citation.endPage931por
oaire.citation.startPage924por
oaire.citation.titleMolecular Phylogenetics and Evolutionpor
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor

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