Simultaneous age-dependent and age-independent sexual selection in the lekking black grouse (Lyrurus tetrix)

The Journal of Animal Ecology
Matti KervinenCarl D Soulsbury

Abstract

Individuals' reproductive success is often strongly associated with their age, with typical patterns of early-life reproductive improvement and late-life senescence. These age-related patterns are due to the inherent trade-offs between life-history traits competing for a limited amount of resources available to the organisms. In males, such trade-offs are exacerbated by the resource requirements associated with the expression of costly sexual traits, leading to dynamic changes in trait expression throughout their life span. Due to the age dependency of male phenotypes, the relationship between the expression of male traits and mating success can also vary with male age. Hence, using longitudinal data in a lekking species with strong sexual selection - the black grouse Lyrurus tetrix - we quantified the effects of age, life span and age of first lek attendance (AFL) on male annual mating success (AMS) to separate the effects of within-individual improvement and senescence on AMS from selective (dis)appearance of certain phenotypes. Then, we used male AMS to quantify univariate and multivariate sexual selection gradients on male morphological and behavioural traits with and without accounting for age and age-related effects of ot...Continue Reading

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Citations

Apr 5, 2017·Biological Reviews of the Cambridge Philosophical Society·Jean-François Lemaître, Jean-Michel Gaillard
Feb 3, 2018·Scientific Reports·Jesús NadalAntoni Margalida
Dec 1, 2019·The Journal of Animal Ecology·Pearl R Rivers, Emily H DuVal
Jul 25, 2018·Ecology and Evolution·Carl D SoulsburyChristophe Lebigre
Nov 7, 2019·Ecology and Evolution·Geoffrey M GouldJacqueline K Augustine
Nov 28, 2017·Oecologia·Carl D SoulsburyChristophe Lebigre

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