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Ancient divergence in the trans-oceanic deep-sea shark Centroscymnus crepidater

2012Journal article Open access
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dc.contributor.authorCunha, R. L.
dc.contributor.authorCoscia, I.
dc.contributor.authorMadeira, C.
dc.contributor.authorMariani, S.
dc.contributor.authorStefanni, S.
dc.contributor.authorCastilho, Rita
dc.date.accessioned2014-05-20T12:15:28Z
dc.date.available2014-05-20T12:15:28Z
dc.date.issued2012
dc.date.updated2014-05-16T08:59:16Z
dc.description.abstractUnravelling the genetic structure and phylogeographic patterns of deep-sea sharks is particularly challenging given the inherent difficulty in obtaining samples. The deep-sea shark Centroscymnus crepidater is a medium-sized benthopelagic species that exhibits a circumglobal distribution occurring both in the Atlantic and Indo-Pacific Oceans. Contrary to the wealth of phylogeographic studies focused on coastal sharks, the genetic structure of bathyal species remains largely unexplored. We used a fragment of the mitochondrial DNA control region, and microsatellite data, to examine genetic structure in C. crepidater collected from the Atlantic Ocean, Tasman Sea, and southern Pacific Ocean (Chatham Rise). Two deeply divergent (3.1%) mtDNA clades were recovered, with one clade including both Atlantic and Pacific specimens, and the other composed of Atlantic samples with a single specimen from the Pacific (Chatham Rise). Bayesian analyses estimated this splitting in the Miocene at about 15 million years ago. The ancestral C. crepidater lineage was probably widely distributed in the Atlantic and Indo-Pacific Oceans. The oceanic cooling observed during the Miocene due to an Antarctic glaciation and the Tethys closure caused changes in environmental conditions that presumably restricted gene flow between basins. Fluctuations in food resources in the Southern Ocean might have promoted the dispersal of C. crepidater throughout the northern Atlantic where habitat conditions were more suitable during the Miocene. The significant genetic structure revealed by microsatellite data suggests the existence of present-day barriers to gene flow between the Atlantic and Pacific populations most likely due to the influence of the Agulhas Current retroflection on prey movements.por
dc.identifier.citationCunha, R. L.; Coscia, I.; Madeira, C.; Mariani, S.; Stefanni, S.; Castilho, R. Ancient Divergence in the Trans-Oceanic Deep-Sea Shark Centroscymnus crepidater, PLoS ONE, 7, 11, e49196-e49196, 2012.por
dc.identifier.doihttp://dx.doi.org/10.1371/journal.pone.0049196
dc.identifier.doi10.1371/journal.pone.0049196
dc.identifier.issn1932-6203
dc.identifier.otherAUT: RCA00270;
dc.identifier.urihttp://hdl.handle.net/10400.1/4013
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherPublic Library of Sciencepor
dc.subjectMitochondrial DNApor
dc.subjectAnimal tissuepor
dc.subjectArticlepor
dc.subjectAtlantic Oceanpor
dc.subjectCell lineagepor
dc.subjectCentroscymnus crepidaterpor
dc.titleAncient divergence in the trans-oceanic deep-sea shark Centroscymnus crepidaterpor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPagee49196por
oaire.citation.issue11por
oaire.citation.startPagee49196por
oaire.citation.titlePLoS ONEpor
oaire.citation.volume7por
person.familyNameCastilho
person.givenNameRita
person.identifier452212
person.identifier.ciencia-id0513-0407-A6C1
person.identifier.orcid0000-0003-0727-3688
person.identifier.ridB-6185-2008
person.identifier.scopus-author-id56271196600
rcaap.rightsopenAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication051f68ec-18e0-4008-b06d-bf4b996fa098
relation.isAuthorOfPublication.latestForDiscovery051f68ec-18e0-4008-b06d-bf4b996fa098

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