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Thermal adaptation and clinal mitochondrial DNA variation of European anchovy

2014-10Journal article Open access
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dc.contributor.authorSilva, Goncalo
dc.contributor.authorLima, Fernando P.
dc.contributor.authorMartel, Paulo
dc.contributor.authorCastilho, Rita
dc.date.accessioned2018-12-07T14:58:09Z
dc.date.available2018-12-07T14:58:09Z
dc.date.issued2014-10
dc.description.abstractNatural populations of widely distributed organisms often exhibit genetic clinal variation over their geographical ranges. The European anchovy, Engraulis encrasicolus, illustrates this by displaying a two-clade mitochondrial structure clinally arranged along the eastern Atlantic. One clade has low frequencies at higher latitudes, whereas the other has an anti-tropical distribution, with frequencies decreasing towards the tropics. The distribution pattern of these clades has been explained as a consequence of secondary contact after an ancient geographical isolation. However, it is not unlikely that selection acts on mitochondria whose genes are involved in relevant oxidative phosphorylation processes. In this study, we performed selection tests on a fragment of 1044 bp of the mitochondrial cytochrome b gene using 455 individuals from 18 locations. We also tested correlations of six environmental features: temperature, salinity, apparent oxygen utilization and nutrient concentrations of phosphate, nitrate and silicate, on a compilation of mitochondrial clade frequencies from 66 sampling sites comprising 2776 specimens from previously published studies. Positive selection in a single codon was detected predominantly (99%) in the anti-tropical clade and temperature was the most relevant environmental predictor, contributing with 59% of the variance in the geographical distribution of clade frequencies. These findings strongly suggest that temperature is shaping the contemporary distribution of mitochondrial DNA clade frequencies in the European anchovy.
dc.description.sponsorshipFCT [SFRH/BD/36600/2007, IF/00043/2012]
dc.identifier.doi10.1098/rspb.2014.1093
dc.identifier.issn0962-8452
dc.identifier.issn1471-2954
dc.identifier.urihttp://hdl.handle.net/10400.1/11886
dc.language.isoeng
dc.peerreviewedyes
dc.publisherRoyal Soc
dc.relationSTUDY OF GENETIC GRADIENTS AMONG POPULATIONS OF ATLANTIC ANCHOVY ENGRAULIS ENCRASICOLUS L. LOCATED ALONG MARINE ECOTONES
dc.subjectEngraulis encrasicolus
dc.subjectPopulation structure
dc.subjectAdaptive evolution
dc.subjectSelection
dc.subjectHypothesis
dc.subjectTemperature
dc.subjectMetabolism
dc.subjectDiversity
dc.subjectAtlantic
dc.subjectAnimals
dc.titleThermal adaptation and clinal mitochondrial DNA variation of European anchovy
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleSTUDY OF GENETIC GRADIENTS AMONG POPULATIONS OF ATLANTIC ANCHOVY ENGRAULIS ENCRASICOLUS L. LOCATED ALONG MARINE ECOTONES
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F36600%2F2007/PT
oaire.citation.issue1792
oaire.citation.startPage20141093
oaire.citation.titleProceedings of the Royal Society B-Biological Sciences
oaire.citation.volume281
person.familyNamesilva
person.familyNameMartel
person.familyNameCastilho
person.givenNameGoncalo
person.givenNamePaulo
person.givenNameRita
person.identifier1955829
person.identifier452212
person.identifier.ciencia-idDA15-EB7F-6483
person.identifier.ciencia-idAD16-8C2A-26CE
person.identifier.ciencia-id0513-0407-A6C1
person.identifier.orcid0000-0001-6700-6720
person.identifier.orcid0000-0001-8237-1267
person.identifier.orcid0000-0003-0727-3688
person.identifier.ridM-3418-2013
person.identifier.ridK-4704-2013
person.identifier.ridB-6185-2008
person.identifier.scopus-author-id7101625192
person.identifier.scopus-author-id56271196600
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccess
rcaap.typearticle
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