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Correlated evolution of distinct signals associated with increased social selection in female white‐shouldered fairywrens

Conspicuous female signals have recently received substantial scientific attention, but it remains unclear if their evolution is the result of selection acting on females independently of males or if mutual selection facilitates female change. Species that express female, but not male, phenotypic va...

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Autores principales: Jones, John Anthony, Odom, Karan J., Hoppe, Ian R., Nason, Doka, Ketaloya, Serena, Karubian, Jordan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8668759/
https://www.ncbi.nlm.nih.gov/pubmed/34938513
http://dx.doi.org/10.1002/ece3.8370
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author Jones, John Anthony
Odom, Karan J.
Hoppe, Ian R.
Nason, Doka
Ketaloya, Serena
Karubian, Jordan
author_facet Jones, John Anthony
Odom, Karan J.
Hoppe, Ian R.
Nason, Doka
Ketaloya, Serena
Karubian, Jordan
author_sort Jones, John Anthony
collection PubMed
description Conspicuous female signals have recently received substantial scientific attention, but it remains unclear if their evolution is the result of selection acting on females independently of males or if mutual selection facilitates female change. Species that express female, but not male, phenotypic variation among populations represents a useful opportunity to address this knowledge gap. White‐shouldered fairywrens (Malurus alboscapulatus) are tropical songbirds with a well‐resolved phylogeny where female, but not male, coloration varies allopatrically across subspecies. We explored how four distinct signaling modalities, each putatively associated with increased social selection, are expressed in two populations that vary in competitive pressure on females. Females in a derived subspecies (M. a. moretoni) have evolved more ornamented plumage and have shorter tails (a signal of social dominance) relative to an ancestral subspecies (M. a. lorentzi) with drab females. In response to simulated territorial intrusions broadcasting female song, both sexes of M. a. moretoni are more aggressive and more coordinated with their mates in both movement and vocalizations. Finally, M. a. moretoni songs are more complex than M. a. lorentzi, but song complexity does not vary between sexes in either population. These results suggest that correlated phenotypic shifts in coloration and tail morphology in females as well as song complexity and aggression in both sexes may have occurred in response to changes in the intensity of social selection pressures. This highlights increased competitive pressures in both sexes can facilitate the evolution of complex multimodal signals.
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spelling pubmed-86687592021-12-21 Correlated evolution of distinct signals associated with increased social selection in female white‐shouldered fairywrens Jones, John Anthony Odom, Karan J. Hoppe, Ian R. Nason, Doka Ketaloya, Serena Karubian, Jordan Ecol Evol Research Articles Conspicuous female signals have recently received substantial scientific attention, but it remains unclear if their evolution is the result of selection acting on females independently of males or if mutual selection facilitates female change. Species that express female, but not male, phenotypic variation among populations represents a useful opportunity to address this knowledge gap. White‐shouldered fairywrens (Malurus alboscapulatus) are tropical songbirds with a well‐resolved phylogeny where female, but not male, coloration varies allopatrically across subspecies. We explored how four distinct signaling modalities, each putatively associated with increased social selection, are expressed in two populations that vary in competitive pressure on females. Females in a derived subspecies (M. a. moretoni) have evolved more ornamented plumage and have shorter tails (a signal of social dominance) relative to an ancestral subspecies (M. a. lorentzi) with drab females. In response to simulated territorial intrusions broadcasting female song, both sexes of M. a. moretoni are more aggressive and more coordinated with their mates in both movement and vocalizations. Finally, M. a. moretoni songs are more complex than M. a. lorentzi, but song complexity does not vary between sexes in either population. These results suggest that correlated phenotypic shifts in coloration and tail morphology in females as well as song complexity and aggression in both sexes may have occurred in response to changes in the intensity of social selection pressures. This highlights increased competitive pressures in both sexes can facilitate the evolution of complex multimodal signals. John Wiley and Sons Inc. 2021-11-23 /pmc/articles/PMC8668759/ /pubmed/34938513 http://dx.doi.org/10.1002/ece3.8370 Text en © 2021 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Articles
Jones, John Anthony
Odom, Karan J.
Hoppe, Ian R.
Nason, Doka
Ketaloya, Serena
Karubian, Jordan
Correlated evolution of distinct signals associated with increased social selection in female white‐shouldered fairywrens
title Correlated evolution of distinct signals associated with increased social selection in female white‐shouldered fairywrens
title_full Correlated evolution of distinct signals associated with increased social selection in female white‐shouldered fairywrens
title_fullStr Correlated evolution of distinct signals associated with increased social selection in female white‐shouldered fairywrens
title_full_unstemmed Correlated evolution of distinct signals associated with increased social selection in female white‐shouldered fairywrens
title_short Correlated evolution of distinct signals associated with increased social selection in female white‐shouldered fairywrens
title_sort correlated evolution of distinct signals associated with increased social selection in female white‐shouldered fairywrens
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8668759/
https://www.ncbi.nlm.nih.gov/pubmed/34938513
http://dx.doi.org/10.1002/ece3.8370
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