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Does genetic distance between parental species influence outcomes of hybridization among coral reef butterflyfishes?

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dc.contributor Australian Institute Of Marine Science
dc.contributor Sch Marine & Trop Biol
dc.contributor Curtin Univ
dc.contributor James Cook Univ
dc.contributor James Cook University
dc.contributor Dept Environm & Agr
dc.contributor Aims Jcu
dc.contributor Curtin University
dc.contributor Australian Inst Marine Sci
dc.contributor Arc Ctr Excellence Coral Reef Studies
dc.contributor Ctr Sustainable Trop Fisheries & Aquaculture VAN HERWERDEN, LYNNE MONTANARI, STEFANO R. HOBBS, JEAN-PAUL A. PRATCHETT, MORGAN S. BAY, LINE K. 2014-07-18T05:12:11Z 2017-03-21T00:44:44Z 2017-03-21T00:44:44Z 2019-05-09T01:04:24Z 2014-07-18T05:12:11Z 2017-03-21T00:44:44Z 2017-03-21T00:44:44Z 2019-05-09T01:04:24Z 2014-06-01
dc.identifier.citation Montanari SR, Hobbs J-PA, Pratchett MS, Bay LK, van Herwerden L (2014) Does genetic distance between parental species influence outcomes of hybridisation among coral reef butterflyfishes? Molecular Ecology 23(11): 2757-2770 en_US
dc.identifier.issn 0962-1083
dc.description.abstract Christmas Island is located at the overlap of the Indian and Pacific Ocean marine provinces and is a hot spot for marine hybridization. Here, we evaluate the ecological framework and genetic consequences of hybridization between butterflyfishes Chaetodon guttatissimus and Chaetodon punctatofasciatus. Further, we compare our current findings to those from a previous study of hybridization between Chaetodon trifasciatus and Chaetodon lunulatus. For both species groups, habitat and dietary overlap between parental species facilitate frequent heterospecific encounters. Low abundance of potential mates promotes heterospecific pair formation and the breakdown of assortative mating. Despite similarities in ecological frameworks, the population genetic signatures of hybridization differ between the species groups. Mitochondrial and nuclear data from C.guttatissimusxC.punctatofasciatus (1% divergence at cyt b) show bidirectional maternal contributions and relatively high levels of introgression, both inside and outside the Christmas Island hybrid zone. In contrast, C.trifasciatusxC.lunulatus (5% cyt b divergence) exhibit unidirectional mitochondrial inheritance and almost no introgression. Back-crossing of hybrid C.guttatissimusxC.punctatofasciatus and parental genotypes may eventually confound species-specific signals within the hybrid zone. In contrast, hybrids of C.trifasciatus and C.lunulatus may coexist with and remain genetically distinct from the parents. Our results, and comparisons with hybridization studies in other reef fish families, indicate that genetic distance between hybridizing species may be a factor influencing outcomes of hybridization in reef fish, which is consistent with predictions from terrestrially derived hybridization theory.
dc.description.sponsorship This study was financially supported by AIMS@JCU (SRM) and the ARC CoE for Coral Reef Studies (MSP). We thank Giacomo Bernardi, Shane Blowes, Sean Connolly and five anonymous reviewers for comments that improved this manuscript; Jeremiah Plass-Johnson and Ulrich Frye for providing Zanzibar collections; all staff at MEEL Townsville, AGRF Brisbane, GGF Athens and MACROGEN Seoul for assistance with laboratory work, sequencing and genotyping; Parks Australia and Wet N' Dry Adventures for logistic support at Christmas Island.
dc.description.uri en_US
dc.language English
dc.language.iso en en_US
dc.publisher Wiley en_US
dc.relation.ispartof Null
dc.subject Great-barrier-reef
dc.subject Molecular Phylogenetics
dc.subject Darwins Finches
dc.subject Ecology
dc.subject Chaetodontidae
dc.subject Evolutionary Biology
dc.subject Hybrid Ecology
dc.subject Fishes
dc.subject Environmental Sciences & Ecology
dc.subject Christmas Island
dc.subject Introgression
dc.subject Newhybrids
dc.subject Genus-chaetodon
dc.subject Indo-pacific
dc.subject Family Labridae
dc.subject Serranidae
dc.subject Biochemistry & Molecular Biology
dc.subject Structure
dc.subject Hybrid Speciation
dc.subject Evolution
dc.title Does genetic distance between parental species influence outcomes of hybridization among coral reef butterflyfishes?
dc.type journal article en_US
dc.identifier.doi 10.1111/mec.12762
dc.identifier.wos WOS:000337587700009

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