Cargando…

Testing multiple hypotheses on the colour change of treefrogs in response to various external conditions

Amphibians are famous for their ability to change colours. And a considerable number of studies have investigated the internal and external factors that affect the expression of this phenotypic plasticity. Evidence to date suggests that thermoregulation and camouflage are the main pressures that inf...

Descripción completa

Detalles Bibliográficos
Autores principales: Park, Chohee, No, Seongsoo, Yoo, Sohee, Oh, Dogeun, Hwang, Yerin, Kim, Yongsu, Kang, Changku
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10015036/
https://www.ncbi.nlm.nih.gov/pubmed/36918652
http://dx.doi.org/10.1038/s41598-023-31262-y
_version_ 1784907128663703552
author Park, Chohee
No, Seongsoo
Yoo, Sohee
Oh, Dogeun
Hwang, Yerin
Kim, Yongsu
Kang, Changku
author_facet Park, Chohee
No, Seongsoo
Yoo, Sohee
Oh, Dogeun
Hwang, Yerin
Kim, Yongsu
Kang, Changku
author_sort Park, Chohee
collection PubMed
description Amphibians are famous for their ability to change colours. And a considerable number of studies have investigated the internal and external factors that affect the expression of this phenotypic plasticity. Evidence to date suggests that thermoregulation and camouflage are the main pressures that influence frogs’ adaptive colour change responses. However, certain gaps in our knowledge of this phenomenon remain, namely: (i) how do frogs adjust their colour in response to continuously changing external conditions?; (ii) what is the direction of change when two different functions of colour (camouflage and thermoregulation) are in conflict?; (iii) does reflectance in the near-infrared region show thermally adaptive change?; and (iv) is the colour change ability of each frog an individual trait (i.e., consistent within an individual over time)? Using Dryophytes japonicus (Hylidae, Hyla), we performed a series of experiments to answer the above questions. We first showed that frogs’ responses to continuously-changing external conditions (i.e., background colour and temperature) were not linear and limited to the range they experience under natural conditions. Second, when a functional conflict existed, camouflage constrained the adaptive response for thermoregulation and vice versa. Third, though both temperature and background colour induced a change in near-infrared reflectance, this change was largely explained by the high correlation between colour (reflectance in the visible spectrum) and near-infrared reflectance. Fourth, within-individual variation in colour change capacity (i.e., the degree of colour change an individual can display) was lower than inter-individual variation, suggesting individuality of colour change capacity; however, we also found that colour change capacity could change gradually with time within individuals. Our results collectively reveal several new aspects of how evolution shapes the colour change process and highlight how variation in external conditions restricts the extent of colour change in treefrogs.
format Online
Article
Text
id pubmed-10015036
institution National Center for Biotechnology Information
language English
publishDate 2023
publisher Nature Publishing Group UK
record_format MEDLINE/PubMed
spelling pubmed-100150362023-03-16 Testing multiple hypotheses on the colour change of treefrogs in response to various external conditions Park, Chohee No, Seongsoo Yoo, Sohee Oh, Dogeun Hwang, Yerin Kim, Yongsu Kang, Changku Sci Rep Article Amphibians are famous for their ability to change colours. And a considerable number of studies have investigated the internal and external factors that affect the expression of this phenotypic plasticity. Evidence to date suggests that thermoregulation and camouflage are the main pressures that influence frogs’ adaptive colour change responses. However, certain gaps in our knowledge of this phenomenon remain, namely: (i) how do frogs adjust their colour in response to continuously changing external conditions?; (ii) what is the direction of change when two different functions of colour (camouflage and thermoregulation) are in conflict?; (iii) does reflectance in the near-infrared region show thermally adaptive change?; and (iv) is the colour change ability of each frog an individual trait (i.e., consistent within an individual over time)? Using Dryophytes japonicus (Hylidae, Hyla), we performed a series of experiments to answer the above questions. We first showed that frogs’ responses to continuously-changing external conditions (i.e., background colour and temperature) were not linear and limited to the range they experience under natural conditions. Second, when a functional conflict existed, camouflage constrained the adaptive response for thermoregulation and vice versa. Third, though both temperature and background colour induced a change in near-infrared reflectance, this change was largely explained by the high correlation between colour (reflectance in the visible spectrum) and near-infrared reflectance. Fourth, within-individual variation in colour change capacity (i.e., the degree of colour change an individual can display) was lower than inter-individual variation, suggesting individuality of colour change capacity; however, we also found that colour change capacity could change gradually with time within individuals. Our results collectively reveal several new aspects of how evolution shapes the colour change process and highlight how variation in external conditions restricts the extent of colour change in treefrogs. Nature Publishing Group UK 2023-03-14 /pmc/articles/PMC10015036/ /pubmed/36918652 http://dx.doi.org/10.1038/s41598-023-31262-y Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Park, Chohee
No, Seongsoo
Yoo, Sohee
Oh, Dogeun
Hwang, Yerin
Kim, Yongsu
Kang, Changku
Testing multiple hypotheses on the colour change of treefrogs in response to various external conditions
title Testing multiple hypotheses on the colour change of treefrogs in response to various external conditions
title_full Testing multiple hypotheses on the colour change of treefrogs in response to various external conditions
title_fullStr Testing multiple hypotheses on the colour change of treefrogs in response to various external conditions
title_full_unstemmed Testing multiple hypotheses on the colour change of treefrogs in response to various external conditions
title_short Testing multiple hypotheses on the colour change of treefrogs in response to various external conditions
title_sort testing multiple hypotheses on the colour change of treefrogs in response to various external conditions
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10015036/
https://www.ncbi.nlm.nih.gov/pubmed/36918652
http://dx.doi.org/10.1038/s41598-023-31262-y
work_keys_str_mv AT parkchohee testingmultiplehypothesesonthecolourchangeoftreefrogsinresponsetovariousexternalconditions
AT noseongsoo testingmultiplehypothesesonthecolourchangeoftreefrogsinresponsetovariousexternalconditions
AT yoosohee testingmultiplehypothesesonthecolourchangeoftreefrogsinresponsetovariousexternalconditions
AT ohdogeun testingmultiplehypothesesonthecolourchangeoftreefrogsinresponsetovariousexternalconditions
AT hwangyerin testingmultiplehypothesesonthecolourchangeoftreefrogsinresponsetovariousexternalconditions
AT kimyongsu testingmultiplehypothesesonthecolourchangeoftreefrogsinresponsetovariousexternalconditions
AT kangchangku testingmultiplehypothesesonthecolourchangeoftreefrogsinresponsetovariousexternalconditions