Hybridisation among groupers (genus Cephalopholis) at the eastern Indian Ocean suture zone: taxonomic and evolutionary implications

Handle URI:
http://hdl.handle.net/10754/621454
Title:
Hybridisation among groupers (genus Cephalopholis) at the eastern Indian Ocean suture zone: taxonomic and evolutionary implications
Authors:
Payet, Samuel D.; Hobbs, Jean-Paul A.; DiBattista, Joseph ( 0000-0002-5696-7574 ) ; Newman, Stephen J.; Sinclair-Taylor, Tane; Berumen, Michael L. ( 0000-0003-2463-2742 ) ; McIlwain, Jennifer L.
Abstract:
Hybridisation is a significant evolutionary process that until recently was considered rare in the marine environment. A suture zone in the eastern Indian Ocean is home to numerous hybridising sister species, providing an ideal opportunity to determine how hybridisation affects speciation and biodiversity in coral reef fishes. At this location, hybridisation between two grouper (Epinephelidae) species: Cephalopholis urodeta (Pacific Ocean) and C. nigripinnis (Indian Ocean) was investigated to determine the genetic basis of hybridisation and to compare the ecology and life history of hybrids and their parent species. This approach aimed to provide insights into the taxonomic and evolutionary consequences of hybridisation. Despite clear phenotypic differences, multiple molecular markers revealed hybrids, and their parent species were genetically homogenous within and (thousands of kilometres) outside of the hybrid zone. Hybrids were at least as fit as their parent species (in terms of growth, reproduction, and abundance) and were observed in a broad range of intermediate phenotypes. The two species appear to be interbreeding at Christmas Island due to inherent biological and ecological compatibilities, and the lack of genetic structure may be explained by three potential scenarios: (1) hybridisation and introgression; (2) discordance between morphology and genetics; and (3) incomplete lineage sorting. Further molecular analyses are necessary to discriminate these scenarios. Regardless of which applies, C. urodeta and C. nigripinnis are unlikely to evolve in reproductive isolation as they cohabit where they are common (Christmas Island) and will source congeneric mates where they are rare (Cocos Keeling Islands). Our results add to the growing body of evidence that hybridisation among coral reef fishes is a dynamic evolutionary factor. © 2016 Springer-Verlag Berlin Heidelberg
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division; Environmental Science and Engineering Program; Red Sea Research Center (RSRC)
Citation:
Payet SD, Hobbs J-PA, DiBattista JD, Newman SJ, Sinclair-Taylor T, et al. (2016) Hybridisation among groupers (genus Cephalopholis) at the eastern Indian Ocean suture zone: taxonomic and evolutionary implications. Coral Reefs. Available: http://dx.doi.org/10.1007/s00338-016-1482-4.
Publisher:
Springer Nature
Journal:
Coral Reefs
Issue Date:
5-Aug-2016
DOI:
10.1007/s00338-016-1482-4
Type:
Article
ISSN:
0722-4028; 1432-0975
Sponsors:
King Abdullah University of Science and Technology
Appears in Collections:
Articles; Red Sea Research Center (RSRC); Environmental Science and Engineering Program; Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorPayet, Samuel D.en
dc.contributor.authorHobbs, Jean-Paul A.en
dc.contributor.authorDiBattista, Josephen
dc.contributor.authorNewman, Stephen J.en
dc.contributor.authorSinclair-Taylor, Taneen
dc.contributor.authorBerumen, Michael L.en
dc.contributor.authorMcIlwain, Jennifer L.en
dc.date.accessioned2016-11-03T08:29:43Z-
dc.date.available2016-11-03T08:29:43Z-
dc.date.issued2016-08-05en
dc.identifier.citationPayet SD, Hobbs J-PA, DiBattista JD, Newman SJ, Sinclair-Taylor T, et al. (2016) Hybridisation among groupers (genus Cephalopholis) at the eastern Indian Ocean suture zone: taxonomic and evolutionary implications. Coral Reefs. Available: http://dx.doi.org/10.1007/s00338-016-1482-4.en
dc.identifier.issn0722-4028en
dc.identifier.issn1432-0975en
dc.identifier.doi10.1007/s00338-016-1482-4en
dc.identifier.urihttp://hdl.handle.net/10754/621454-
dc.description.abstractHybridisation is a significant evolutionary process that until recently was considered rare in the marine environment. A suture zone in the eastern Indian Ocean is home to numerous hybridising sister species, providing an ideal opportunity to determine how hybridisation affects speciation and biodiversity in coral reef fishes. At this location, hybridisation between two grouper (Epinephelidae) species: Cephalopholis urodeta (Pacific Ocean) and C. nigripinnis (Indian Ocean) was investigated to determine the genetic basis of hybridisation and to compare the ecology and life history of hybrids and their parent species. This approach aimed to provide insights into the taxonomic and evolutionary consequences of hybridisation. Despite clear phenotypic differences, multiple molecular markers revealed hybrids, and their parent species were genetically homogenous within and (thousands of kilometres) outside of the hybrid zone. Hybrids were at least as fit as their parent species (in terms of growth, reproduction, and abundance) and were observed in a broad range of intermediate phenotypes. The two species appear to be interbreeding at Christmas Island due to inherent biological and ecological compatibilities, and the lack of genetic structure may be explained by three potential scenarios: (1) hybridisation and introgression; (2) discordance between morphology and genetics; and (3) incomplete lineage sorting. Further molecular analyses are necessary to discriminate these scenarios. Regardless of which applies, C. urodeta and C. nigripinnis are unlikely to evolve in reproductive isolation as they cohabit where they are common (Christmas Island) and will source congeneric mates where they are rare (Cocos Keeling Islands). Our results add to the growing body of evidence that hybridisation among coral reef fishes is a dynamic evolutionary factor. © 2016 Springer-Verlag Berlin Heidelbergen
dc.description.sponsorshipKing Abdullah University of Science and Technologyen
dc.publisherSpringer Natureen
dc.subjectChristmas Islanden
dc.titleHybridisation among groupers (genus Cephalopholis) at the eastern Indian Ocean suture zone: taxonomic and evolutionary implicationsen
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.identifier.journalCoral Reefsen
dc.contributor.institutionDepartment of Environment and Agriculture, School of Science, Curtin University, P.O. Box U1987, Perth, WA, Australiaen
dc.contributor.institutionWestern Australian Fisheries and Marine Research Laboratories, Department of Fisheries, Government of Western Australia, P.O. Box 20, North Beach, WA, Australiaen
kaust.authorDiBattista, Josephen
kaust.authorSinclair-Taylor, Taneen
kaust.authorBerumen, Michael L.en
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