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Melanin‐based ornament darkness positively correlates with across‐season nutritional condition

Sexually dimorphic ornamental traits are widely regarded as indicators of nutritional condition. However, variation of nutritional condition outside the reproductive and the ornament production seasons has rarely been considered, although it affects the generality of information content, especially...

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Autores principales: Hegyi, Gergely, Laczi, Miklós, Kötél, Dóra, Csörgő, Tibor
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7713921/
https://www.ncbi.nlm.nih.gov/pubmed/33304519
http://dx.doi.org/10.1002/ece3.6898
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author Hegyi, Gergely
Laczi, Miklós
Kötél, Dóra
Csörgő, Tibor
author_facet Hegyi, Gergely
Laczi, Miklós
Kötél, Dóra
Csörgő, Tibor
author_sort Hegyi, Gergely
collection PubMed
description Sexually dimorphic ornamental traits are widely regarded as indicators of nutritional condition. However, variation of nutritional condition outside the reproductive and the ornament production seasons has rarely been considered, although it affects the generality of information content, especially for ornaments that may be used across the year. We measured several indicators of migratory and molt condition in male and female blackcaps (Sylvia atricapilla) during their autumn migration, and quantified their crown reflectance. We detected robust correlations between migratory and molt condition indices, and the correlation structure was similar in the two sexes. Furthermore, the across‐season measure of body condition was positively related to the darkness of the black crown in males, while being unrelated to reflectance traits of the reddish crown in females. Our results reinforce the possibility that some melanin‐based ornaments may be year‐round indicators of individual quality via their dependence on nutritional condition.
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spelling pubmed-77139212020-12-09 Melanin‐based ornament darkness positively correlates with across‐season nutritional condition Hegyi, Gergely Laczi, Miklós Kötél, Dóra Csörgő, Tibor Ecol Evol Original Research Sexually dimorphic ornamental traits are widely regarded as indicators of nutritional condition. However, variation of nutritional condition outside the reproductive and the ornament production seasons has rarely been considered, although it affects the generality of information content, especially for ornaments that may be used across the year. We measured several indicators of migratory and molt condition in male and female blackcaps (Sylvia atricapilla) during their autumn migration, and quantified their crown reflectance. We detected robust correlations between migratory and molt condition indices, and the correlation structure was similar in the two sexes. Furthermore, the across‐season measure of body condition was positively related to the darkness of the black crown in males, while being unrelated to reflectance traits of the reddish crown in females. Our results reinforce the possibility that some melanin‐based ornaments may be year‐round indicators of individual quality via their dependence on nutritional condition. John Wiley and Sons Inc. 2020-10-12 /pmc/articles/PMC7713921/ /pubmed/33304519 http://dx.doi.org/10.1002/ece3.6898 Text en © 2020 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Research
Hegyi, Gergely
Laczi, Miklós
Kötél, Dóra
Csörgő, Tibor
Melanin‐based ornament darkness positively correlates with across‐season nutritional condition
title Melanin‐based ornament darkness positively correlates with across‐season nutritional condition
title_full Melanin‐based ornament darkness positively correlates with across‐season nutritional condition
title_fullStr Melanin‐based ornament darkness positively correlates with across‐season nutritional condition
title_full_unstemmed Melanin‐based ornament darkness positively correlates with across‐season nutritional condition
title_short Melanin‐based ornament darkness positively correlates with across‐season nutritional condition
title_sort melanin‐based ornament darkness positively correlates with across‐season nutritional condition
topic Original Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7713921/
https://www.ncbi.nlm.nih.gov/pubmed/33304519
http://dx.doi.org/10.1002/ece3.6898
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