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dc.contributor.authorMoran, Peter
dc.contributor.authorHunt, John
dc.contributor.authorMitchell, Christopher
dc.contributor.authorRitchie, Michael G.
dc.contributor.authorBailey, Nathan W.
dc.identifier.citationMoran , P , Hunt , J , Mitchell , C , Ritchie , M G & Bailey , N W 2019 , ' Behavioural mechanisms of sexual isolation involving multiple modalities and their inheritance ' , Journal of Evolutionary Biology , vol. 32 , no. 3 , pp. 243-258 .
dc.identifier.otherPURE: 256753936
dc.identifier.otherPURE UUID: af5e9cb7-ede5-4c4b-a9c3-85db7ba575d1
dc.identifier.otherORCID: /0000-0001-7913-8675/work/52572468
dc.identifier.otherScopus: 85058945033
dc.identifier.otherWOS: 000460194800005
dc.identifier.otherORCID: /0000-0003-3531-7756/work/60888395
dc.descriptionFunding support was provided by NERC grants to N.W.B. (NE/G014906/1, NE/L011255/1), NERC (NE/G00949X/1) and ARC grants to J.H (DP180101708), and an Orthopterists’ Society grant to P.A.M.en
dc.description.abstractSpeciation research dissects the genetics and evolution of reproductive barriers between parental species. Hybrids are the ‘gatekeepers’ of gene flow, so it is also important to understand the behavioural mechanisms and genetics of any potential isolation from their parental species. We tested the role of multiple behavioural barriers in reproductive isolation among closely related field crickets and their hybrids (Teleogryllus oceanicus and T. commodus). These species hybridize in the laboratory, but the behaviour of hybrids is unusual and there is little evidence for gene flow in the wild. We found that heterospecific pairs exhibited reduced rates of courtship behaviour due to discrimination by both sexes, and that this behavioural isolation was symmetrical. However, hybrids were not sexually selected against and exhibited high rates of courtship behaviour even though hybrid females are sterile. Using reciprocal hybrid crosses, we characterized patterns of interspecific divergence and inheritance in key sexual traits that might underlie the mating patterns we found: calling song, courtship song and cuticular hydrocarbons (CHCs). Song traits exhibited both sex linkage and transgressive segregation, whereas CHCs exhibited only the latter. Calculations of the strength of isolation exerted by these sexual traits suggest that close‐range signals are as important as long‐distance signals in contributing to interspecific sexual isolation. The surprisingly weak mating barriers observed between hybrids and parental species highlight the need to examine reproductive isolating mechanisms and their genetic bases across different potential stages of introgressive hybridization.
dc.relation.ispartofJournal of Evolutionary Biologyen
dc.rightsCopyright © 2018 European Society For Evolutionary Biology. Journal of Evolutionary Biology. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at
dc.subjectAcoustic signalen
dc.subjectCuticular hydrocarbonsen
dc.subjectMulti-model signallingen
dc.subjectPrezygotic isolationen
dc.subjectReproductive isolationen
dc.subjectSexual selectionen
dc.subjectQH301 Biologyen
dc.titleBehavioural mechanisms of sexual isolation involving multiple modalities and their inheritanceen
dc.typeJournal articleen
dc.contributor.institutionUniversity of St Andrews. Centre for Biological Diversityen
dc.contributor.institutionUniversity of St Andrews. Institute of Behavioural and Neural Sciencesen
dc.contributor.institutionUniversity of St Andrews. School of Biologyen
dc.description.statusPeer revieweden

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