Geographic variation in breeding system and environment predicts melanin-based plumage ornamentation of male and female Kentish plovers

Behavioral Ecology and Sociobiology
Araceli Argüelles-TicóRené E van Dijk

Abstract

Sexual selection determines the elaboration of morphological and behavioural traits and thus drives the evolution of phenotypes. Sexual selection on males and females can differ between populations, especially when populations exhibit different breeding systems. A substantial body of literature describes how breeding systems shape ornamentation across species, with a strong emphasis on male ornamentation and female preference. However, whether breeding system predicts ornamentation within species and whether similar mechanisms as in males also shape the phenotype of females remains unclear. Here, we investigate how different breeding systems are associated with male and female ornamentation in five geographically distinct populations of Kentish plovers Charadrius alexandrinus. We predicted that polygamous populations would exhibit more elaborate ornaments and stronger sexual dimorphism than monogamous populations. By estimating the size and intensity of male (n = 162) and female (n = 174) melanin-based plumage ornaments, i.e. breast bands and ear coverts, we show that plumage ornamentation is predicted by breeding system in both sexes. A difference in especially male ornamentation between polygamous (darker and smaller ornament...Continue Reading

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Citations

Jun 22, 2017·Proceedings of the National Academy of Sciences of the United States of America·Luke J Eberhart-PhillipsTamás Székely
Aug 19, 2020·Scientific Reports·Grant C McDonaldAndrás Kosztolányi
Jun 14, 2019·Scientific Reports·Keren R SadanandanShaoyuan Wu

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