Evidence of stable genetic structure across a remote island archipelago through self-recruitment in a widely dispersed coral reef fish

Handle URI:
http://hdl.handle.net/10754/325376
Title:
Evidence of stable genetic structure across a remote island archipelago through self-recruitment in a widely dispersed coral reef fish
Authors:
Priest, Mark; Halford, Andrew R; McIlwain, Jennifer L
Abstract:
We used microsatellite markers to assess the population genetic structure of the scribbled rabbitfish Siganus spinus in the western Pacific. This species is a culturally important food fish in the Mariana Archipelago and subject to high fishing pressure. Our primary hypothesis was to test whether the individuals resident in the southern Mariana Island chain were genetically distinct and hence should be managed as discrete stocks. In addition to spatial sampling of adults, newly-settled individuals were sampled on Guam over four recruitment events to assess the temporal stability of the observed spatial patterns, and evidence of self-recruitment. We found significant genetic structure in S. spinus across the western Pacific, with Bayesian analyses revealing three genetically distinct clusters: the southernMariana Islands, east Micronesia, and the west Pacific; with the southern Mariana Islands beingmore strongly differentiated fromthe rest of the region. Analyses of temporal samples from Guam indicated the southern Mariana cluster was stable over time, with no genetic differentiation between adults versus recruits, or between samples collected across four separate recruitment events spanning 11 months. Subsequent assignment tests indicated seven recruits had self-recruited from within the Southern Mariana Islands population. Our results confirm the relative isolation of the southern Mariana Islands population and highlight how local processes can act to isolate populations that, by virtue of their broad-scale distribution, have been subject to traditionally high gene flows. Our results add to a growing consensus that self-recruitment is a highly significant influence on the population dynamics of tropical reef fish. 2012 The Authors. Ecology and Evolution published by Blackwell Publishing Ltd.
KAUST Department:
Red Sea Research Center (RSRC)
Citation:
Priest MA, Halford AR, McIlwain JL (2012) Evidence of stable genetic structure across a remote island archipelago through self-recruitment in a widely dispersed coral reef fish. Ecology and Evolution 2: 3195-3213. doi:10.1002/ece3.260.
Publisher:
Wiley-Blackwell
Journal:
Ecology and Evolution
Issue Date:
19-Nov-2012
DOI:
10.1002/ece3.260
PubMed ID:
23301184
PubMed Central ID:
PMC3539012
Type:
Article
ISSN:
20457758
Appears in Collections:
Articles; Red Sea Research Center (RSRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorPriest, Marken
dc.contributor.authorHalford, Andrew Ren
dc.contributor.authorMcIlwain, Jennifer Len
dc.date.accessioned2014-08-27T09:49:51Z-
dc.date.available2014-08-27T09:49:51Z-
dc.date.issued2012-11-19en
dc.identifier.citationPriest MA, Halford AR, McIlwain JL (2012) Evidence of stable genetic structure across a remote island archipelago through self-recruitment in a widely dispersed coral reef fish. Ecology and Evolution 2: 3195-3213. doi:10.1002/ece3.260.en
dc.identifier.issn20457758en
dc.identifier.pmid23301184en
dc.identifier.doi10.1002/ece3.260en
dc.identifier.urihttp://hdl.handle.net/10754/325376en
dc.description.abstractWe used microsatellite markers to assess the population genetic structure of the scribbled rabbitfish Siganus spinus in the western Pacific. This species is a culturally important food fish in the Mariana Archipelago and subject to high fishing pressure. Our primary hypothesis was to test whether the individuals resident in the southern Mariana Island chain were genetically distinct and hence should be managed as discrete stocks. In addition to spatial sampling of adults, newly-settled individuals were sampled on Guam over four recruitment events to assess the temporal stability of the observed spatial patterns, and evidence of self-recruitment. We found significant genetic structure in S. spinus across the western Pacific, with Bayesian analyses revealing three genetically distinct clusters: the southernMariana Islands, east Micronesia, and the west Pacific; with the southern Mariana Islands beingmore strongly differentiated fromthe rest of the region. Analyses of temporal samples from Guam indicated the southern Mariana cluster was stable over time, with no genetic differentiation between adults versus recruits, or between samples collected across four separate recruitment events spanning 11 months. Subsequent assignment tests indicated seven recruits had self-recruited from within the Southern Mariana Islands population. Our results confirm the relative isolation of the southern Mariana Islands population and highlight how local processes can act to isolate populations that, by virtue of their broad-scale distribution, have been subject to traditionally high gene flows. Our results add to a growing consensus that self-recruitment is a highly significant influence on the population dynamics of tropical reef fish. 2012 The Authors. Ecology and Evolution published by Blackwell Publishing Ltd.en
dc.language.isoenen
dc.publisherWiley-Blackwellen
dc.rights© 2012 Published by Blackwell Publishing Ltd.en
dc.rightsRe-use of this article is permitted in accordance with the Creative Commons Deed, Attribution 2.5, which does not permit commercial exploitation.en
dc.rightsArchived with thanks to Ecology and Evolutionen
dc.rights.urihttp://creativecommons.org/licenses/by/2.5/en
dc.subjectConnectivityen
dc.subjectGuamen
dc.subjectMicronesiaen
dc.subjectPopulation geneticsen
dc.subjectSelf-recruitmenten
dc.subjectSiganus spinusen
dc.titleEvidence of stable genetic structure across a remote island archipelago through self-recruitment in a widely dispersed coral reef fishen
dc.typeArticleen
dc.contributor.departmentRed Sea Research Center (RSRC)en
dc.identifier.journalEcology and Evolutionen
dc.identifier.pmcidPMC3539012en
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionUniversity of Guam Marine Laboratory, Mangilao 96923, Guamen
dc.contributor.institutionDepartment of Environment and Agriculture, Curtin University, GPO Box U1987, Perth, WA, Australiaen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorPriest, Marken
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