Immunocompetence handicap hypothesis in tree frog: trade-off between sexual signals and immunity?

Desprat, Julia L.; Lengagne, Thierry; Dumet, Adeline; Desouhant, Emmanuel; Mondy, Nathalie

doi:10.1093/beheco/arv057

Cited by 43 publications

(40 citation statements)

References 54 publications

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“…Our results are in accordance with the conclusions from Desprat et al. () and indicate that individuals with better maintenance of body mass could have an immune response that is upregulated by higher plasma T levels, coupled to increased reproductive capacity. Immune defense can be costly and individuals with less energy reserves could present with a reduced immune response (Reviewed in Martin et al., ).…”

Section: Discussionsupporting

confidence: 93%

“…Although T shows several immunosuppressive effects (Martin, Weil, & Nelson, ; Roberts, Buchanan, & Evans, ), a positive correlation between plasma T levels and immune response, in an acute stress paradigm, has been reported in birds (Davies, Noor, Carpentier, & Deviche, ). Additionally, an immune enhancing effect of T‐implants has been demonstrated in anuran males, characterized by increased body mass (Desprat et al., ). In our study, individuals with higher plasma T levels and PE also presented with lower BML percentage over time.…”

Section: Discussionmentioning

confidence: 99%

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Captivity effects on immune response and steroid plasma levels of a Brazilian toad (Rhinella schneideri)

et al. 2017

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Stressors can increase plasma glucocorticoid (GC) levels and decrease plasma androgen levels in different species of vertebrates. GCs can have immune-enhancing or immunosuppressive effects, which are dependent upon stress duration and intensity. The worldwide decline in amphibian populations is strongly linked to an array of different stressors. The impacts of stress on GCs, androgens, and the immune response are important to clarify and should lead to the better development of conservation strategies. The present study in adult male toads of Rhinella schneideri investigated the effects of captivity (7, 30, and 60 days) on plasma corticosterone (CORT) and plasma testosterone (T), as well as innate immune responses, specifically humoral and cell mediated responses, as indicated by bacterial killing ability (BKA) and phagocytosis by peritoneal cells, respectively. Captivity increased CORT threefold and decreased T versus controls. CORT maintained a threefold elevation throughout the captivity period, while body mass and T gradually decreased with time in captivity. BKA was lower at day 30, versus days 7 and 60, while peritoneal cell phagocytic efficiency decreased after day 30, remaining low at day 60. Moreover, phagocytosis efficiency was positively associated with T and body condition, suggesting that the effects of chronic stress on reproductive potential and immune response might be associated with the state of energetic reserves.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Captivity effects on immune response and steroid plasma levels of a Brazilian toad (Rhinella schneideri)

et al. 2017

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“…Under low light conditions, acoustic communication should play a larger role in female mate choice in amphibians Narins 1991, Ryan 1991). For example, female European treefrogs (Hyla arborea) select males with conspicuous vocal sacs and pronounced flank stripes (Gomez et al 2009, Desprat et al 2015. For example, female European treefrogs (Hyla arborea) select males with conspicuous vocal sacs and pronounced flank stripes (Gomez et al 2009, Desprat et al 2015.…”

Section: Introductionmentioning

confidence: 99%

Tick parasitism as a cost of sexual selection and male parental care in a Neotropical frog

et al. 2020

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opez-Torres. 2020. Tick parasitism as a cost of sexual selection and male parental care in a Neotropical frog. Ecosphere 11(1):Abstract. Sexual selection can drive variation in conspicuous traits, providing signals to females about overall male health including their ability to fight parasites. Trait-parasite relationships have been extensively studied in fish and birds, but few records exist for amphibians. Here, we focused on a direct-developing frog (Eleutherodactylus cooki) that exhibits variation in the extent of yellow coloration on the venter of males, a sexually selected trait that is correlated with reproductive success and parental care. We quantified the relationship between the color trait and the prevalence of two parasites, a tick (Carios undescribed sp.) and a fungal pathogen (Batrachochytrium dendrobatidis), across hosts, populations, and environmental contexts. We found that tick larvae were carried more frequently by males than females. Among males, ticks parasitized more those with a greater extent of yellow coloration. We did not detect any patterns associated with sex, habitat use, or male coloration with fungal infections. Co-infections were low (5%) and predominantly occurred in males (71%). Our findings highlight the reproductive cost of tick parasitism for males and suggest that females may assess both the quality of parental care and overall health in areas of high tick exposure. Thus, yellow coloration in males of this nocturnal amphibian may have evolved as an honest signal of health and quality of parental care.

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“…Adicionalmente, estudos recentes têm demonstrado que os efeitos estimuladores da T são observados, principalmente, associados a uma boa condição corpórea do animal. Desprat et al (2015) demonstraram que pererecas tratadas com T, que apresentaram maiores níveis plasmáticos de T e com uma melhor condição corpórea, também apresentaram uma maior resposta inflamatória quando comparados com indivíduos com menor condição corpórea e com o grupo placebo (sem aplicação de T).…”

Section: Imunomodulação Mediada Por Andrógenosunclassified

Variações na resposta imune, níveis plasmáticos de corticosterona e testosterona e condição corpórea de sapos Brasileiros em resposta ao cativeiro

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Immunocompetence handicap hypothesis in tree frog: trade-off between sexual signals and immunity?

Cited by 43 publications

References 54 publications

Captivity effects on immune response and steroid plasma levels of a Brazilian toad (Rhinella schneideri)

Captivity effects on immune response and steroid plasma levels of a Brazilian toad (Rhinella schneideri)

Tick parasitism as a cost of sexual selection and male parental care in a Neotropical frog

Variações na resposta imune, níveis plasmáticos de corticosterona e testosterona e condição corpórea de sapos Brasileiros em resposta ao cativeiro

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Immunocompetence handicap hypothesis in tree frog: trade-off between sexual signals and immunity?

Cited by 43 publications

References 54 publications

Captivity effects on immune response and steroid plasma levels of a Brazilian toad (Rhinella schneideri)

Captivity effects on immune response and steroid plasma levels of a Brazilian toad (Rhinella schneideri)

Tick parasitism as a cost of sexual selection and male parental care in a Neotropical frog

Variações na resposta imune, ní­veis plasmáticos de corticosterona e testosterona e condição corpórea de sapos Brasileiros em resposta ao cativeiro

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Variações na resposta imune, níveis plasmáticos de corticosterona e testosterona e condição corpórea de sapos Brasileiros em resposta ao cativeiro