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dc.contributor.authorAmundsen, Trond
dc.date.accessioned2019-09-05T11:48:34Z
dc.date.available2019-09-05T11:48:34Z
dc.date.created2018-11-30T15:16:52Z
dc.date.issued2018
dc.identifier.citationCurrent Zoology. 2018, 64 (3), 363-392.nb_NO
dc.identifier.issn1674-5507
dc.identifier.urihttp://hdl.handle.net/11250/2612664
dc.description.abstractOur understanding of sexual selection has greatly improved during the last decades. The focus is no longer solely on males, but also on how female competition and male mate choice shape ornamentation and other sexually selected traits in females. At the same time, the focus has shifted from documenting sexual selection to exploring variation and spatiotemporal dynamics of sexual selection, and their evolutionary consequences. Here, I review insights from a model system with exceptionally dynamic sexual selection, the two-spotted goby fish Gobiusculus flavescens. The species displays a complete reversal of sex roles over a 3-month breeding season. The reversal is driven by a dramatic change in the operational sex ratio, which is heavily male-biased at the start of the season and heavily female-biased late in the season. Early in the season, breeding-ready males outnumber mature females, causing males to be highly competitive, and leading to sexual selection on males. Late in the season, mating-ready females are in excess, engage more in courtship and aggression than males, and rarely reject mating opportunities. With typically many females simultaneously courting available males late in the season, males become selective and prefer more colorful females. This variable sexual selection regime likely explains why both male and female G. flavescens have ornamental colors. The G. flavescens model system reveals that sexual behavior and sexual selection can be astonishingly dynamic in response to short-term fluctuations in mating competition. Future work should explore whether sexual selection is equally dynamic on a spatial scale, and related spatiotemporal dynamics.nb_NO
dc.language.isoengnb_NO
dc.publisherOxford University Press (OUP)nb_NO
dc.rightsNavngivelse-Ikkekommersiell 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/deed.no*
dc.titleSex roles and sexual selection: Lessons from a dynamic model systemnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionpublishedVersionnb_NO
dc.source.pagenumber363-392nb_NO
dc.source.volume64nb_NO
dc.source.journalCurrent Zoologynb_NO
dc.source.issue3nb_NO
dc.identifier.doi10.1093/cz/zoy036
dc.identifier.cristin1637722
dc.description.localcodeCopyright The Author(s) (2018). Published by Oxford University Press. 363 This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/),nb_NO
cristin.unitcode194,66,10,0
cristin.unitnameInstitutt for biologi
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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