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

Badiane, Arnaud; Dupoué, Andréaz; Blaimont, Pauline; Miles, Donald B.; Gilbert, Anthony L.; Leroux-Coyau, Mathieu; Kawamoto, Anna; Rozen‐Rechels, David; Meylan, Sandrine; Clobert, Jean; Galliard, Jean‐François Le

doi:10.1111/1365-2656.13773

Cited by 7 publications

(3 citation statements)

References 103 publications

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“…By contrast, the index hypothesis posits that carotenoid coloration is inherently condition dependent and that such ornaments are co‐opted as signals of condition in social signalling (Hill, 2014; Weaver et al ., 2017). The hue or chroma of ornamental carotenoid coloration has been linked to aspects of individual condition, including body condition, diet, immunocompetence, parasite load, oxidative stress, and physical performance in numerous studies of birds and fish [reviewed in Kodric‐Brown (1989), Hill (2002), Svensson & Wong (2011) and Sefc, Brown & Clotfelter (2014)], as well as in studies of other classes of vertebrates (Fitze et al ., 2009; Badiane et al ., 2022) and arthropods (e.g. Davenport et al ., 2004; Hsiung et al ., 2017; Weaver et al ., 2018 c ).…”

Section: Carotenoid Coloration As a Model Condition‐dependent Traitmentioning

confidence: 99%

Carotenoid ornaments and the spandrels of physiology: a critique of theory to explain condition dependency

2023

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Even as numerous studies have documented that the red and yellow coloration resulting from the deposition of carotenoids serves as an honest signal of condition, the evolution of condition dependency is contentious. The resource trade‐off hypothesis proposes that condition‐dependent honest signalling relies on a trade‐off of resources between ornamental display and body maintenance. By this model, condition dependency can evolve through selection for a re‐allocation of resources to promote ornament expression. By contrast, the index hypothesis proposes that selection focuses mate choice on carotenoid coloration that is inherently condition dependent because production of such coloration is inexorably tied to vital cellular processes. These hypotheses for the origins of condition dependency make strongly contrasting and testable predictions about ornamental traits. To assess these two models, we review the mechanisms of production of carotenoids, patterns of condition dependency involving different classes of carotenoids, and patterns of behavioural responses to carotenoid coloration. We review evidence that traits can be condition dependent without the influence of sexual selection and that novel traits can show condition‐dependent expression as soon as they appear in a population, without the possibility of sexual selection. We conclude by highlighting new opportunities for studying condition‐dependent signalling made possible by genetic manipulation and expression of ornamental traits in synthetic biological systems.

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Section: Carotenoid Coloration As a Model Condition‐dependent Traitmentioning

confidence: 99%

Carotenoid ornaments and the spandrels of physiology: a critique of theory to explain condition dependency

2023

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“…A positive covariation of Karyolysus parasitemia and male nuptial coloration has been reported for the lacertid species Podarcis muralis , Gallotia galloti , and Psammodromus algirus (Martín et al, 2008; Megía‐Palma et al, 2016; Megía‐Palma, Merino, et al, 2022). This can be interpreted as a cost associated with male reproductive effort (Badiane et al, 2022; Megía‐Palma et al, 2021). In contrast, Schellackia primarily infects the intestine walls of lizards (Bristovetzky & Paperna, 1990).…”

Section: Introductionmentioning

confidence: 99%

“…We predicted that leukocyte profiles of the lizards will show further costs to those already described on body condition and associated with translocation (see Barrientos & Megía‐Palma, 2021). Finally, we also expect trade‐offs between the recovery ability from parasitic infections and color patch production (a proxy to reproductive effort in males; Badiane et al, 2022), where those males that increase coloration will perform worse at reducing blood parasites.…”

Section: Introductionmentioning

confidence: 99%

Differential recovery ability from infections by two blood parasite genera in males of a Mediterranean lacertid lizard after an experimental translocation

Megía‐Palma,

Redondo,

Blázquez‐Castro

et al. 2023

J Exp Zool Pt A

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Different blood parasites can co‐infect natural populations of lizards. However, our knowledge of the host's ability to recover from them (i.e., significantly reduce parasitemia levels) is scarce. This has interest from an ecological immunology perspective. Herein, we investigate the host recovery ability in males of the lizard Psammodromus algirus infected by parasite genera Schellackia and Karyolysus. The role of lizard hosts is dissimilar in the life cycle of these two parasites, and thus different immune control of the infections is expected by the vertebrate host. As Schellackia performs both sexual and asexual reproduction cycles in lizards, we expect a better immune control by its vertebrate hosts. On the contrary, Karyolysus performs sexual reproductive cycles in vectors, hence we expect lower immune control by the lizards. We carried out a reciprocal translocation experiment during the lizards’ mating season to evaluate both parasitemia and leukocyte profiles in male lizards, being one of the sampling plots close to a road with moderate traffic. These circumstances provide a combination of extrinsic (environmental stress) and intrinsic factors (reproductive vs. immune trade‐offs) that may influence host's recovery ability. We recaptured 33% of the lizards, with a similar proportion in control and translocated groups. Karyolysus infected 92.3% and Schellackia 38.5% of these lizards. Hosts demonstrated ability to significantly reduce parasitemia of Schellackia but not of Karyolysus. This suggests, in line with our predictions, a differential immune relationship of lizards with these parasites, at time that supports that parasites with different phylogenetic origins should be analyzed separately in investigations of their effects on hosts. Furthermore, lizards close to the road underwent a stronger upregulation of lymphocytes and monocytes when translocated far from the road, suggesting a putative greater exposure to pathogens in the latter area.

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Urbanisation impacts the diversity, coloration, and body size of wild bees in a Mediterranean city

Badiane,

Ropars,

Flacher

et al. 2024

Reg Environ Change

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

Abstract: This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Cited by 7 publications

References 103 publications

Carotenoid ornaments and the spandrels of physiology: a critique of theory to explain condition dependency

Carotenoid ornaments and the spandrels of physiology: a critique of theory to explain condition dependency

Differential recovery ability from infections by two blood parasite genera in males of a Mediterranean lacertid lizard after an experimental translocation

Urbanisation impacts the diversity, coloration, and body size of wild bees in a Mediterranean city

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