Environmental conditions and male quality traits simultaneously explain variation of multiple colour signals in male lizards

Type Article
Date 2022-09
Language English
Author(s) Badiane ArnaudORCID1, Dupoue AndreazORCID1, Blaimont Pauline2, Miles Donald B.3, Gilbert Anthony L.3, Leroux-Coyau MathieuORCID1, Kawamoto AnnaORCID1, Rozen-Rechels David1, Meylan Sandrine1, Clobert Jean4, Le Galliard Jean-Francois1, 5
Affiliation(s) 1 : Sorbonne Université, CNRS, IRD, INRA, Institut d'écologie et des sciences de l'environnement (IEES), Paris, France
2 : Rider University, Lawrenceville, NJ, USA
3 : Department of Biological Sciences, Ohio University, Athens, OH, USA
4 : Station d'Ecologie Théorique et Expérimentale (SETE), USR5321, CNRS, Moulis, France
5 : Centre de Recherche en Écologie Expérimentale et Prédictive (CEREEP-Ecotron IleDeFrance), Département de biologie, Ecole Normale Supérieure, CNRS, PSL Research University, Saint-Pierre- lès- Nemours, France
Source Journal Of Animal Ecology (0021-8790) (Wiley), 2022-09 , Vol. 91 , N. 9 , P. 1906-1917
DOI 10.1111/1365-2656.13773
WOS© Times Cited 2
Keyword(s) animal communication, colouration, parasitism, performance, reptile, testosterone, ultraviolet, Zootoca vivipara

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Male lizards often display multiple pigment-based and structural colour signals which may reflect various quality traits (e.g. performance, parasitism), with testosterone (T) often mediating these relationships. Furthermore, environmental conditions can explain colour signal variation by affecting processes such as signal efficacy, thermoregulation and camouflage. The relationships between colour signals, male quality traits and environmental factors have often been analysed in isolation, but simultaneous analyses are rare. Thus, the response of multiple colour signals to variation in all these factors in an integrative analysis remains to be investigated.

Here, we investigated how multiple colour signals relate to their information content, examined the role of T as a potential mediator of these relationships and how environmental factors explain colour signal variation.

We performed an integrative study to examine the covariation between three colour signals (melanin-based black, carotenoid-based yellow–orange and structural UV), physiological performance, parasitism, T levels and environmental factors (microclimate, forest cover) in male common lizards Zootoca vivipara from 13 populations.

We found that the three colour signals conveyed information on different aspects of male condition, supporting a multiple message hypothesis. T influenced only parasitism, suggesting that T does not directly mediate the relationships between colour signals and their information content. Moreover, colour signals became more saturated in forested habitats, suggesting an adaptation to degraded light conditions, and became generally brighter in mesic conditions, in contradiction with the thermal melanism hypothesis.

We show that distinct individual quality traits and environmental factors simultaneously explain variations of multiple colour signals with different production modes. Our study therefore highlights the complexity of colour signal evolution, involving various sets of selective pressures acting at the same time, but in different ways depending on colour production mechanism.

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Badiane Arnaud, Dupoue Andreaz, Blaimont Pauline, Miles Donald B., Gilbert Anthony L., Leroux-Coyau Mathieu, Kawamoto Anna, Rozen-Rechels David, Meylan Sandrine, Clobert Jean, Le Galliard Jean-Francois (2022). Environmental conditions and male quality traits simultaneously explain variation of multiple colour signals in male lizards. Journal Of Animal Ecology, 91(9), 1906-1917. Publisher's official version : https://doi.org/10.1111/1365-2656.13773 , Open Access version : https://archimer.ifremer.fr/doc/00794/90640/