Local not vocal: assortative female choice in divergent populations of red-eyed treefrogs,<i>Agalychnis callidryas</i>(Hylidae: Phyllomedusinae)

Jacobs, Leah E.; Vega, Andres; Dudgeon, Steve; Kaiser, Kristine; Robertson, Jeanne M.

doi:10.1111/bij.12861

Cited by 21 publications

(38 citation statements)

References 60 publications

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“…Female mate choice trials in red-eyed treefrogs revealed a strong pattern of assortative mating for color morphs, indicating a possible role in social signaling (Jacobs et al, 2016). Further, as with other phyllomedusines, A. callidryas produces toxic secretions with reports of frogs being regurgitated by natural predators (e.g., snakes), supporting the possibility of aposematic coloration as a defense mechanism in this species (Sazima, 1974).…”

Section: Peptide Diversity and Color Variation In A Nocturnal Frogmentioning

confidence: 67%

Host Defense Skin Peptides Vary with Color Pattern in the Highly Polymorphic Red-Eyed Treefrog

et al. 2016

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Patterns of phenotypic variation across a geographic range provide important insights into evolutionary processes underlying diversification and speciation. Most evolutionary studies use putatively neutral markers to examine evolutionary diversification. However, functional phenotypes such as gene-encoded host-defense polypeptides (HDPs) could provide key insights into the processes of population differentiation, yet they are rarely included in population analyses. The red-eyed treefrog, Agalychnis callidryas Cope, 1862, exhibits regional variation in multiple traits, including color pattern and body size across a narrow geographic range. This treefrog produces bioactive peptides exuded onto the skin surface, presumably for pathogen and predator defense. However, the geographic patterns of variation in peptides and the factors that mediate intraspecific peptide variation across the range of this species remain untested. Here, we examine the roles of phylogenetic history, geographic barriers, geographic distance, and color-pattern variation as determinants of skin peptide diversity in 54 individuals among 11 populations across Costa Rica and Panama. Each of the five distinct Agalychnis color morphs are represented in our sample. We performed peptide mass fingerprinting and compared mass spectral data from skin peptide secretions to quantify divergence in peptide profiles among individuals, both within and among regions. We used two metrics to estimate genetic variation: Genetic distance estimated from microsatellites and patristic distance estimated from mtDNA haplotype diversity. Matrix correspondence tests revealed that skin peptide variation is best predicted by differences in leg color pattern across all regions. In addition, we found that flank color pattern and phylogeny also explain differences in peptide diversity. Patterns of peptide differentiation and phylogenetic topology were incongruent in two regions, indicating a possible role of localized selection on peptide variation. Skin peptide profiles are useful in population differentiation studies of August 2016Davis et al. Skin Peptide Variation in Agalychnis callidryasa polymorphic species as well as studies of selection and phenotype co-variation among closely related species. Our results highlight the use of skin peptides as characters for future studies of population differentiation and contribute to our understanding of biogeography in Central America.

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Section: Peptide Diversity and Color Variation In A Nocturnal Frogmentioning

confidence: 67%

Host Defense Skin Peptides Vary with Color Pattern in the Highly Polymorphic Red-Eyed Treefrog

et al. 2016

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“…Yet, the costs of signal honesty in amphibians are less known. However, a number of nocturnal frog species combine vocalizations with visual signals to attract females (Gomez et al 2009, Jacobs et al 2016. However, a number of nocturnal frog species combine vocalizations with visual signals to attract females (Gomez et al 2009, Jacobs et al 2016.…”

Section: Introductionmentioning

confidence: 99%

“…However, a number of nocturnal frog species combine vocalizations with visual signals to attract females (Gomez et al 2009, Jacobs et al 2016. Female red-eyed treefrogs (Agalychnis callidryas) choose mates without depending on male advertisement calls (Jacobs et al 2016), suggesting the use of non-acoustic signals. Female red-eyed treefrogs (Agalychnis callidryas) choose mates without depending on male advertisement calls (Jacobs et al 2016), suggesting the use of non-acoustic signals.…”

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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“…Pyburn () described female response behavior as a back display during which females approach a male head‐on and turn 180°, soliciting males to mount onto their backs, indicating readiness for amplexus. We identified a second mating signal—termed a flank display—while conducting mate choice trials with live females and males (Jacobs, Vega, Dudgeon, Kaiser, & Robertson, ). When presenting a flank display, a female approaches a male either head‐on or from the side, orients so that her side is facing him, and presents outstretched arms and legs, revealing colorful flank stripes.…”

Section: Introductionmentioning

confidence: 99%

“…Red‐eyed treefrogs exhibit substantial geographic variation on a relatively small spatial scale within Costa Rica and Panama (Figure ), yet genetic analyses indicate ongoing gene flow among phenotypically differentiated populations (Robertson, Duryea, & Zamudio, ), and phylogenetic analyses of Central American phyllomedusines demonstrate that color pattern variation among lineages is not explained by evolutionary history (Robertson & Greene, ). Further, a mate choice study of two allopatric red‐eyed treefrog populations demonstrated female preference for local males, even in the absence of calls (i.e., when males did not call during experiments) (Jacobs et al., ), suggesting that visual signals are important in mate selection. To date, there is no knowledge of population variation in male advertisement call and/or female response behaviors to male stimuli.…”

Section: Introductionmentioning

confidence: 99%

Melodic males and flashy females: Geographic variation in male and female reproductive behavior in red‐eyed treefrogs (Agalychnis callidryas)

Akopyan

Kaiser

Vega³

et al. 2017

Ethology

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Geographic variation in courtship behavior can affect reproductive success of divergent phenotypes via mate choice. Over time, this can lead to reproductive isolation and ultimately to speciation. The Neotropical red-eyed treefrog (Agalychnis callidryas) exhibits high levels of phenotypic variation among populations in Costa Rica and Panama, including differences in color pattern, body size, and skin peptides. To test the extent of behavioral premating isolation among differentiated populations, we quantified male advertisement calls from six sites and female responses to male stimuli (acoustic and visual signals) from four sites. Our results show that both male advertisement calls and female behavior vary among populations: Discriminant function analyses can predict the population of origin for 99.3% ± 0.7 of males based on male call (dominant frequency and bandwidth) and 76.1% ± 6.6 of females based on female response behavior (frequency and duration of visual displays). Further, female mate choice trials (n = 69) showed that population divergence in male signals is coupled with female preference for local male stimuli. Combined, these results suggest that evolved differences among populations in male call properties and female response signals could have consequences for reproductive isolation. Finally, population variation in male and female behavior was not well explained by geographic or genetic distance, indicating a role for localized selection and/or drift. The interplay between male courtship and female responses may facilitate the evolution of local variants in courtship style, thus accelerating premating isolation via assortative mating.

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Local not vocal: assortative female choice in divergent populations of red-eyed treefrogs,Agalychnis callidryas(Hylidae: Phyllomedusinae)

Cited by 21 publications

References 60 publications

Host Defense Skin Peptides Vary with Color Pattern in the Highly Polymorphic Red-Eyed Treefrog

Host Defense Skin Peptides Vary with Color Pattern in the Highly Polymorphic Red-Eyed Treefrog

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

Melodic males and flashy females: Geographic variation in male and female reproductive behavior in red‐eyed treefrogs (Agalychnis callidryas)

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