Seasonal change in the opportunity for sexual selection

Molecular Ecology
M ReichardJ Bryja

Abstract

Environmental and population parameters that influence the strength of sexual selection may vary considerably over the course of the reproductive season. However, the potential for sexual selection frequently fails to translate into variation in reproductive success among individuals. We investigated seasonal changes in variation in reproductive success, measured as the opportunity for sexual selection, using parentage analysis in 20 experimental populations of the European bitterling (Rhodeus amarus, Cyprinidae), a small freshwater fish with a promiscuous, resource-based mating system. We showed that although the largest males sired most offspring over the entire reproductive season, variation in reproductive success and hence the opportunity for sexual selection was low at the start of the season but increased significantly at its end. This seasonal difference probably arose from the superior competitive endurance of large males and from a higher temporal clustering of reproductively active females at the start of the breeding season than later in the season. The spatial distribution of oviposition sites had a negligible effect on the variation in reproductive success. We discuss the potential implications of our results for ...Continue Reading

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Citations

Mar 7, 2013·Behavioural Processes·Carlos PassosGil G Rosenthal
Jun 5, 2015·Proceedings. Biological Sciences·Carl SmithMartin Reichard
Jan 22, 2009·Evolution; International Journal of Organic Evolution·Mara CasaliniCarl Smith
Aug 8, 2009·Molecular Ecology·K M SefcS Koblmüller
Jan 22, 2010·Journal of Evolutionary Biology·H KlugH Kokko
Feb 13, 2010·Evolution; International Journal of Organic Evolution·Muna AgbaliCarl Smith
Jun 12, 2014·Molecular Ecology·Sebastian WackerKenyon B Mobley
Jul 6, 2018·BMC Evolutionary Biology·Veronika BartákováMartin Reichard
Jun 14, 2014·Journal of Evolutionary Biology·C SmithM Reichard

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