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17 results for “gray treefrog”
Data from: Longer days, larger grays: Carryover effects of photoperiod and temperature in gray treefrogs, Hyla versicolor
<p>Environmental conditions like temperature and photoperiod can strongly shape organisms' growth and development. For many ectotherms with complex life cycles, global change will cause their offspring to experience warmer conditions and earlier-season photoperiods, two variables that can induce conflicting responses. We experimentally manipulated photoperiod and temperature during gray treefrog (<em>Hyla versicolor</em>) larval development to examine effects at metamorphosis and during short (10-day) and long (56-day) periods post-metamorphosis. Both early- and late-season photoperiods (April and August) decreased age and size at metamorphosis relative to the average-season (June) photoperiod, while warmer temperatures decreased age but increased size at metamorphosis. Warmer larval temperatures reduced short-term juvenile growth but had no long-term effect. Conversely, photoperiod had no short-term carryover effect, but juveniles from early- and late-season larval photoperiods had lower long-term growth rates than juveniles from the average-season photoperiod. Similar responses to early- and late-season photoperiods may be due to reduced total daylight compared to average-season photoperiods. However, juveniles from late-season photoperiods selected cooler temperatures than early-season juveniles, suggesting not all effects of photoperiod were due to total light exposure. Our results indicate that despite both temperature and photoperiod affecting metamorphosis, the long-term effects of photoperiod may be much stronger than those of temperature.</p>
The effect of biofluorescence on predation upon Cope’s gray treefrog: A clay model experiment
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Data from: Longer days, larger grays: Carryover effects of photoperiod and temperature in gray treefrogs, Hyla versicolor
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Data for: Sensory biases in response to novel complex acoustic signals in male and female gray treefrogs, Hyla chrysoscelis
<p>The sensory bias hypothesis proposes that female preferences for male sexual signaling traits evolved in contexts other than mating. Individuals of both sexes may experience similar selection pressures in these contexts, thus males may have similar biases to females for variation in signal traits. We tested this prediction in the gray treefrog, <em>Hyla chrysoscelis</em>, in which males produce simple advertisement calls, but females are more attracted to certain novel complex stimuli. We recorded males' responses to playbacks of both simple advertisement calls and complex calls consisting of the advertisement call with an acoustic appendage (filtered noise, or heterospecific call pulses) either leading or following the call. We tested females' preferences for the same stimuli in phonotaxis tests. We found evidence for a sensory bias in both sexes: males gave more aggressive calls in response to complex stimuli and females sometimes preferred complex over simple calls. These biases were not universal and depended on both temporal order and appendage characteristics, but how these effects manifested differed between the sexes. Ultimately, our approach of studying biases of both sexes in response to novel mating signals will shed light on the origin of mating preferences, and the mechanisms by which sensory biases operate.</p>
Data for: Sensory biases in response to novel complex acoustic signals in male and female gray treefrogs, Hyla chrysoscelis
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The complex history of genome duplication and hybridization in North American gray treefrogs
<p>Polyploid speciation has played an important role in evolutionary history across the tree of life, yet there remain large gaps in our understanding of how polyploid species form and persist. While systematic studies have been conducted in numerous polyploid complexes, recent advances in sequencing technology have demonstrated that conclusions from data-limited studies may be spurious and misleading. The North American gray treefrog complex, consisting of the diploid <em>Hyla chrysoscelis</em> and the tetraploid <em>Hyla versicolor</em>, has long been used as a model system in a variety of biological fields, yet all taxonomic studies to date were conducted with only a few loci from nuclear and mitochondrial genomes. Here, we utilized anchored hybrid enrichment and high-throughput sequencing to capture hundreds of loci along with whole mitochondrial genomes to investigate the evolutionary history of this complex. We used several phylogenetic and population genetic methods, including coalescent simulations and testing of polyploid speciation models with Approximate Bayesian Computation (ABC), to determine that H. versicolor was most likely formed via autopolyploidization from a now extinct lineage of H. chrysoscelis. We also uncovered evidence of significant hybridization between diploids and tetraploids where they co-occur, and show that historical hybridization between these groups led to the re-formation of distinct polyploid lineages following the initial whole genome duplication event. Our study indicates that a wide variety of methods and explicit model testing of polyploid histories can greatly facilitate efforts to uncover the evolutionary history of polyploid complexes.</p>
Diversification of a polyploid complex: the biogeography and acoustic communication evolution of North American gray treefrogs throughout the Quaternary
<p>Polyploid speciation and whole genome duplications are major drivers of biological diversity. After polyploid species are formed, the interactions between diploid and polyploid lineages may generate additional diversity in novel cytotypes and phenotypes. In anurans, mate choice by acoustic communication is the primary method by which individuals identify their own species and assess suitable mates. As such, the evolution of acoustic signals is an important mechanism for contributing to reproductive isolation and diversification in this group. The North American gray treefrog complex, consisting of the diploid Hyla chrysoscelis and the tetraploid Hyla versicolor, has long been used to study reproductive isolation and research on this system has consistently driven this field forward. Here, we estimate the biogeographic history of this group, focusing specifically on the geographic origin of whole genome duplication and the expansion of lineages out of refugia following climate oscillations and retreats of the Laurentide ice sheet. We then test for lineage-specific differences in mating signals by applying comparative methods to a large acoustic data set collected over 52 years that includes >1500 individual frogs. Finally, we expand upon our results in light of recent estimates of the complex's genomic evolution to describe the history of diversification in gray treefrogs throughout the Quaternary.</p>
Data from: Modality interactions alter the shape of acoustic mate preference functions in gray treefrogs
Sexual selection takes place in complex environments where females evaluating male mating signals are confronted with stimuli from multiple sources and modalities. The pattern of expression of female preferences may be influenced by interactions between modalities, changing the shape of female preference functions, and thus ultimately altering the selective landscape acting on male signal evolution. We tested the hypothesis that the responses of female gray treefrogs, Hyla versicolor, to acoustic male advertisement calls are affected by interactions with visual stimuli. We measured preference functions for several call traits under two experimental conditions: unimodal (only acoustic signals presented), and multimodal (acoustic signals presented along with a video-animated calling male). We found that females were more responsive to multimodal stimulus presentations and, compared to unimodal playbacks, had weaker preferences for temporal call characteristics. We compared the preference functions obtained in these two treatments to the distribution of male call characteristics to make inferences on the strength and direction of selection expected to act on male calls. Modality interactions have the potential to influence the course of signal evolution and thus are an important consideration in sexual selection studies.
Figure 2 in Effect of body size, age and timing of breeding on clutch and egg size of female Eastern Gray Treefrogs, Hyla versicolor
Figure 2. Determinants of clutch size (# eggs) in female Hyla versicolor. (A) Relationship between female body length and clutch size; (B) relationship between body condition and clutch size; (C) relationship between age and clutch size; (D) relationship between breeding season date and clutch size. Second and third clutches of repeat-breeding females are indicated as red symbols. Significant relationships are indicated by trendlines (see also Table 2).
Figure 1 in Effect of body size, age and timing of breeding on clutch and egg size of female Eastern Gray Treefrogs, Hyla versicolor
Figure 1. Lifespan, age and between-year growth of female Hyla versicolor. (A) Age distribution of females in the study population, and the relationship between age and body length. (B) Change in body length of the 7 females that were recaptured in consecutive years. Gray lines indicate averages.
FIG. 1 in Out with the Old, in with the New: Oviposition Preference Matches Larval Success in Cope's Gray Treefrog, Hyla chrysoscelis
FIG. 1. Total number of eggs per treatment (gray = New, black = Old) for each night oviposition occurred, and mean (± SE) number of eggs per New (dark gray) and Old (black) pools over the duration of the experiment.
The complex history of genome duplication and hybridization in North American gray treefrogs
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Data from: A multivariate analysis of genetic variation in the advertisement call of the gray treefrog, Hyla versicolor
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Diversification of a polyploid complex: the biogeography and acoustic communication evolution of North American gray treefrogs throughout the Quaternary
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Data from: Trade-offs and upper limits to signal performance during close-range vocal competition in gray treefrogs, Hyla versicolor
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Data from: Modality interactions alter the shape of acoustic mate preference functions in gray treefrogs
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Data from: Predator specific responses and emergent multi-predator effects on oviposition site choice in gray treefrogs, Hyla chrysoscelis
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Allen Brain Atlas
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International Brain Laboratory public data
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OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.