Multiple colour traits signal performance and immune response in the Dickerson’s collared lizard Crotaphytus dickersonae

Plasman, Melissa; Reynoso, Víctor Hugo; Nicolás, Leticia; Torres, Roxana

doi:10.1007/s00265-015-1892-2

Cited by 31 publications

(21 citation statements)

References 90 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Chroma and brightness values for the (average of right and left) forewing spots were recorded with a hand‐held spectrophotometer (Minolta CM‐2600d; Minolta Co. Ltd, Osaka Japan). This apparatus has a wavelength range of 360 to 740 nm (at 10‐nm intervals), a reflectance range of 0–175% and a resolution of 0.01% (for more details see Contreras‐Garduño, Lanz Mendoza, et al., ; Contreras‐Garduño et al., ; Fargallo et al., ; Plassman, Reynoso, Nicolás, & Torres, ; Montoya & Torres, ; Torres & Velando, ).…”

Section: Methodsmentioning

confidence: 99%

Sexual signals reveal males’ oxidative stress defences: Testing this hypothesis in an invertebrate

et al. 2018

View full text Add to dashboard Cite

The hypothesis that sexual traits reveal the oxidative stress resistance of their bearers has been widely tested in vertebrates but remains unexplored in invertebrates. Here, Hetaerina americana was used to test whether oxidative stress defences are advertised by male wing spot size and colour (a male sexual trait). To this end, we investigated (1) whether oxidative stress reduced survival, (2) whether wing spot size revealed males’ antioxidant defences and (3) how wing spot size and colour were affected by oxidative stress. We elevated oxidative stress by injecting adult males with paraquat (PQ, a compound that favours the production of free radicals) and then examined how this affected male survival and wing spot size. We then related the expression of wing spot size to indicators of oxidative stress—hydrogen peroxide (H2O2) and total antioxidant capacity (TAC), super oxide dismutase (SOD) and catalase (CAT)—in adult males (whose wing spot is fixed) injected with PQ. In teneral males, whose wing spots are still forming, we compared wing spot size, colour (red and yellow chroma) and brightness in individuals injected with PQ or water as a control. Oxidative stress reduced the survival of adult and teneral males. While the H2O2 and TAC markers of antioxidant defences were positively correlated with wing spot size, there was no correlation with CAT and a negative correlation with SOD. In teneral males, PQ increased the yellow chroma and brightness of wing spots, but did not affect spot size or red chroma. Our results highlight the importance of measuring different markers as indicators of male oxidative stress defences, and that the sexual signals of invertebrates may reveal the oxidative stress status of their bearers. A http://onlinelibrary.wiley.com/doi/10.1111/1365-2435.13051/suppinfo is available for this article.

show abstract

Section: Methodsmentioning

confidence: 99%

Sexual signals reveal males’ oxidative stress defences: Testing this hypothesis in an invertebrate

et al. 2018

View full text Add to dashboard Cite

show abstract

“…A key set of hypotheses explaining the evolution and maintenance of multiple signals within a population proposes that multiple signals represent uncorrelated independent pieces of information (multiple message and multiple receiver hypotheses; Moller and Pomiankowski, 1993;Johnstone, 1996). According to the "multiple message hypothesis, " multiple signals can evolve in a population if each signal conveys a different component of information about the overall quality of the signaler (Bókony et al, 2006;Bro-Jørgensen and Dabelsteen, 2008;Martín and López, 2009;Plasman et al, 2015). For example, in the Dickerson's collared lizard (Crotaphytus dickersonae), blue color of the skin appears to convey resource-holding potential while the blackness of the collar indicates immune condition (Plasman et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…According to the "multiple message hypothesis, " multiple signals can evolve in a population if each signal conveys a different component of information about the overall quality of the signaler (Bókony et al, 2006;Bro-Jørgensen and Dabelsteen, 2008;Martín and López, 2009;Plasman et al, 2015). For example, in the Dickerson's collared lizard (Crotaphytus dickersonae), blue color of the skin appears to convey resource-holding potential while the blackness of the collar indicates immune condition (Plasman et al, 2015). In addition, multiple traits could be maintained if they are used in different contexts, or directed toward different receivers (Endler, 1992;Marchetti, 1998;Andersson et al, 2002;Loyau et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

“…While empirical support is arguably the greatest for the multiple-message hypothesis (Martín and López, 2009;Bro-Jørgensen, 2010;Plasman et al, 2015), alternative hypotheses have also been proposed for the maintenance of multiple signals. Several of these propose that multiple signals represent redundant pieces of information and are correlated (Moller and Pomiankowski, 1993;Candolin, 2003;Hebets and Papaj, 2005;Bro-Jørgensen, 2010).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Why Do Males Use Multiple Signals? Insights From Measuring Wild Male Behavior Over Lifespans

Deodhar

Isvaran

2018

Front. Ecol. Evol.

View full text Add to dashboard Cite

Why animals commonly use multiple conspicuous and presumably costly signals is poorly understood. Tests of evolutionary hypotheses comprehensively covering the signaling repertoire in wild populations are crucial to establish biological relevance, yet are relatively rare. We tested a key hypothesis for the maintenance of multiple signals in a wild population of the lizard, Psammophilus dorsalis, specifically whether multiple signals are maintained as multiple messages directed at different receivers. In addition, we also examined patterns in covariation of signals as an initial test of an alternative hypothesis, that multiple signals may be maintained as redundant signals; such traits are proposed to convey and reinforce the same component of information and are expected to be strongly correlated. Breeding male P. dorsalis display from prominent rock perches within their territories, which overlap multiple female home ranges in rocky open habitats. We repeatedly measured the display behavior, covering the entire signaling repertoire, of individually-tagged wild males on their territories over their lifespans. We quantified patterns of covariation in multiple traits and their relationship with multiple receiver contexts, specifically competitors, mates and predators. We also examined the association between male signaling and indices of lifetime fitness. Males commonly used multiple signals, including behavioral signals and a rare dynamic color signal. These traits were strongly correlated and seemed largely directed toward females, suggesting that they were primarily maintained as redundant signals through female choice. However, other selection pressures also appeared to be important. One color trait seemed to be directed at competitors, providing limited support to the multiple receiver hypothesis. Several traits were reduced in the presence of predators, suggesting that they carry the cost of increased predation risk. Thus, multiple selection pressures, primarily female choice and predation risk, appear to affect male signaling. Finally, signaling traits appeared to influence a measure of lifetime reproductive success, providing rare evidence for the biological relevance of signaling traits under natural contexts.

show abstract

“…Better immunocompetence (the ability to mount an immune response to an antigen) is associated with more intense color signals (Faivre et al., ; Peters, Denk, Delhey, & Kempenaers, ; Saks et al., ). For example, male Dickerson's collared lizards with darker collars mounted a greater immune response and had smaller parasite load (Plasman, Reynoso, Nicolas, & Torres, ). Similarly, structural color intensity also increases with immunocompetence in budgerigars ( Melopsittacus undulatus ) (Griggio, Zanollo, & Hoi, ).…”

Section: Introductionmentioning

confidence: 99%

Effects of energy and thermoregulation time on physiological state and sexual signal in a lizard

et al. 2017

View full text Add to dashboard Cite

Theory of sexual selection states that males often develop showy signals, which reduce their survival but increase their reproductive success. During mate choice, these conspicuous signals can be honest indicators of individual quality conveying information about the signaler's physiological state. Sexually selected signals are influenced by many environmental factors; however, whether signals and physiological state are affected together is rarely studied. The ultraviolet-blue throat color of male Lacerta viridis is an intra- and intersexually selected signal connected to blood parasite infection and influenced by environmental factors. The aim of this study was to experimentally investigate how ecologically relevant environmental factors affect color signal intensity and key physiological traits parallel. During the mating season, we exposed 40 adult male lizards infected with blood parasites to food and basking time treatments in a full factorial design. We measured color, amount of reactive oxygen metabolites (ROMs), hematocrit, immunocompetence, and blood parasite intensity before and after treatments. High basking time resulted in elevated immunocompetence coupled with increased ROMs. The high food treatment increased nuptial color brightness, but also increased ROMs and decreased immunocompetence. In summary, our study provides experimental evidence about environmentally induced parallel changes in an honest sexual signal and several quality-indicator physiological traits. We showed that available energy and time for high metabolism have independent and sometimes opposite effects on individual state.

show abstract

Multiple colour traits signal performance and immune response in the Dickerson’s collared lizard Crotaphytus dickersonae

Cited by 31 publications

References 90 publications

Sexual signals reveal males’ oxidative stress defences: Testing this hypothesis in an invertebrate

Sexual signals reveal males’ oxidative stress defences: Testing this hypothesis in an invertebrate

Why Do Males Use Multiple Signals? Insights From Measuring Wild Male Behavior Over Lifespans

Effects of energy and thermoregulation time on physiological state and sexual signal in a lizard

Contact Info

Product

Resources

About