Blinded by the bright: a lack of congruence between colour morphs, phylogeography and taxonomy for a cosmopolitan Indo-Pacific butterflyfish, Chaetodon auriga

Handle URI:
http://hdl.handle.net/10754/566080
Title:
Blinded by the bright: a lack of congruence between colour morphs, phylogeography and taxonomy for a cosmopolitan Indo-Pacific butterflyfish, Chaetodon auriga
Authors:
DiBattista, Joseph ( 0000-0002-5696-7574 ) ; Waldrop, Ellen; Rocha, Luiz A.; Craig, Matthew T.; Berumen, Michael L. ( 0000-0003-2463-2742 ) ; Bowen, Brian W.
Abstract:
Aim: We assess genetic differentiation among biogeographical provinces and colour morphs of the threadfin butterflyfish, Chaetodon auriga. This species is among the most broadly distributed butterflyfishes in the world, occurring on reefs from the Red Sea and western Indian Ocean to French Polynesia and Hawai'i. The Red Sea form lacks a conspicuous 'eye-spot' on the dorsal fin, which may indicate an evolutionary distinction. Location: Red Sea, Indian Ocean and Pacific Ocean. Methods: Specimens were obtained at 17 locations (n = 358) spanning the entire range of this species. The genetic data included 669 base pairs of mitochondrial DNA (mtDNA) cytochrome b and allele frequencies at six microsatellite loci. Analysis of molecular variance, structure plots, haplotype networks and estimates of population expansion time were used to assess phylogeographical patterns. Results: Population structure was low overall, but significant and concordant between molecular markers (mtDNA: ΦST = 0.027, P < 0.001; microsatellites: FST = 0.023, P < 0.001). Significant population-level partitions were only detected at peripheral locations including the Red Sea and Hawai'i. Population expansion events in the Red Sea and Socotra are older (111,940-223,881 years) relative to all other sites (16,343-87,910 years). Main conclusions: We find little genetic evidence to support an evolutionary partition of a previously proposed Red Sea subspecies. The oldest estimate of population expansion in the Red Sea and adjacent Gulf of Aden indicates a putative refuge in this region during Pleistocene glacial cycles. The finding of population separations at the limits of the range, in the Red Sea and Hawai'i, is consistent with peripheral speciation. © 2015 John Wiley & Sons Ltd.
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division; Environmental Science and Engineering Program; Red Sea Research Center (RSRC); Marine Science Program; Reef Ecology Lab
Publisher:
Wiley-Blackwell
Journal:
Journal of Biogeography
Issue Date:
Jul-2015
DOI:
10.1111/jbi.12572
Type:
Article
ISSN:
0305-0270
Appears in Collections:
Articles; Red Sea Research Center (RSRC); Environmental Science and Engineering Program; Marine Science Program; Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorDiBattista, Josephen
dc.contributor.authorWaldrop, Ellenen
dc.contributor.authorRocha, Luiz A.en
dc.contributor.authorCraig, Matthew T.en
dc.contributor.authorBerumen, Michael L.en
dc.contributor.authorBowen, Brian W.en
dc.date.accessioned2015-08-12T09:27:27Zen
dc.date.available2015-08-12T09:27:27Zen
dc.date.issued2015-07en
dc.identifier.issn0305-0270en
dc.identifier.doi10.1111/jbi.12572en
dc.identifier.urihttp://hdl.handle.net/10754/566080en
dc.description.abstractAim: We assess genetic differentiation among biogeographical provinces and colour morphs of the threadfin butterflyfish, Chaetodon auriga. This species is among the most broadly distributed butterflyfishes in the world, occurring on reefs from the Red Sea and western Indian Ocean to French Polynesia and Hawai'i. The Red Sea form lacks a conspicuous 'eye-spot' on the dorsal fin, which may indicate an evolutionary distinction. Location: Red Sea, Indian Ocean and Pacific Ocean. Methods: Specimens were obtained at 17 locations (n = 358) spanning the entire range of this species. The genetic data included 669 base pairs of mitochondrial DNA (mtDNA) cytochrome b and allele frequencies at six microsatellite loci. Analysis of molecular variance, structure plots, haplotype networks and estimates of population expansion time were used to assess phylogeographical patterns. Results: Population structure was low overall, but significant and concordant between molecular markers (mtDNA: ΦST = 0.027, P < 0.001; microsatellites: FST = 0.023, P < 0.001). Significant population-level partitions were only detected at peripheral locations including the Red Sea and Hawai'i. Population expansion events in the Red Sea and Socotra are older (111,940-223,881 years) relative to all other sites (16,343-87,910 years). Main conclusions: We find little genetic evidence to support an evolutionary partition of a previously proposed Red Sea subspecies. The oldest estimate of population expansion in the Red Sea and adjacent Gulf of Aden indicates a putative refuge in this region during Pleistocene glacial cycles. The finding of population separations at the limits of the range, in the Red Sea and Hawai'i, is consistent with peripheral speciation. © 2015 John Wiley & Sons Ltd.en
dc.publisherWiley-Blackwellen
dc.subjectCoral reef fishen
dc.subjectMarine biogeographyen
dc.subjectMicrosatelliteen
dc.subjectMitochondrial DNAen
dc.subjectPopulation expansion timeen
dc.subjectSubspeciesen
dc.titleBlinded by the bright: a lack of congruence between colour morphs, phylogeography and taxonomy for a cosmopolitan Indo-Pacific butterflyfish, Chaetodon aurigaen
dc.typeArticleen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentEnvironmental Science and Engineering Programen
dc.contributor.departmentRed Sea Research Center (RSRC)en
dc.contributor.departmentMarine Science Programen
dc.contributor.departmentReef Ecology Laben
dc.identifier.journalJournal of Biogeographyen
kaust.authorDiBattista, Josephen
kaust.authorBerumen, Michael L.en
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