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507 results for “treefrog”
Aligned DNA sequence matrix for phylogenetic analyses in the article "Three new species of Torrent Treefrogs (Anura: Hylidae) of the Hyloscirtus bogotensis group from the eastern Andean slopes and the biogeographic history of the genus"
<p>Aligned DNA sequence matrix for phylogenetic analyses of the article "Three new species of Torrent Treefrogs (Anura: Hylidae) of the Hyloscirtus bogotensis group from the Amazon foothills and the biogeographic history of the genus"</p> <p>The matrix is in NEXUS format and has 3259 bp and 25 terminals.</p> <p>Partitions are as follows:</p> <div>charset 12S = 1-955;</div> <div>charset ND1_nonCoding1 = 956-1279;</div> <div>charset ND1_Pos1 = 1280-2240\3;</div> <div>charset ND1_Pos2 = 1281-2241\3;</div> <div>charset ND1_Pos3 = 1282-2242\3;</div> <div>charset ND1_nonCoding2 = 2243-2361;</div> <div>charset cmyc_Pos1 = 2362-2779\3;</div> <div>charset cmyc_Pos2 = 2363-2780\3;</div> <div>charset cmyc_Pos3 = 2364-2781\3;</div> <div>charset Rag1_Pos1 = 2782-3415\3;</div> <div>charset Rag1_Pos2 = 2783-3416\3;</div> <div>charset Rag1_Pos3 = 2784-3417\3;</div>
Cue the chorus: Canyon treefrog calling phenology on the falling limb of spring floods and warming nights
Phenology is the timing of life events tied to environmental or abiotic cues. We used autonomous recording units (ARUs) across spring-summer months in 2022 to capture breeding calls from canyon treefrog (Hyla arenicolor). ARUs were placed in perennial and intermittent stream reaches across five Wilderness Areas within the upper Verde River basin in Arizona. We monitored streams by installing stream flow gauges (water level recorders). Treefrogs call at relatively low flow after spring floods. This suggests that stream-dwelling anurans may breed in response to flooding followed by prolonged periods of base flows which could be important for tadpole metamorphosis. Implications for stream regulation suggest maintaining the magnitude and timing of flood pulse events can benefit recruitment of stream-breeding amphibians.
Relyea, R. A., and N. Mills. 2001. Predator-induced stress makes the pesticide carbaryl more deadly to grey treefrog tadpoles (Hyla versicolor). PNAS 98:2491-2496.
Global declines in amphibians likely have multiple causes, including widespread pesticide use. Our knowledge of pesticide effects on amphibians is largely limited to short-term (4-d) toxicity tests conducted under highly artificial conditions to determine lethal concentrations (LC50). We found that if we used slightly longer exposure times (10–16 d), low concentrations of the pesticide carbaryl (3–4% of LC504-d) killed 10–60% of gray treefrog (Hyla versicolor) tadpoles. If predatory cues also were present, the pesticide became 2–4 times more lethal, killing 60–98% of tadpoles. Thus, under more realistic conditions of increased exposure times and predatory stress, current application rates for carbaryl can potentially devastate gray treefrog populations. Further, because predator-induced stress is ubiquitous in animals and carbaryl’s mode of action is common to many pesticides, these negative impacts may be widespread in nature.
Data from: Exploring rainforest diversification using demographic model testing in the African foam-nest treefrog (Chiromantis rufescens)
Aim: Species with wide distributions spanning the African Guinean and Congolian rainforests are often composed of genetically distinct populations or cryptic species with geographic distributions that mirror the locations of the remaining forest habitats. We used phylogeographic inference and demographic model testing to evaluate diversification models in a widespread rainforest species, the African Foam-nest Treefrog (Chiromantis rufescens). Location: Guinean and Congolian rainforests, West and Central Africa. Taxon: Chiromantis rufescens. Methods: We collected mitochondrial DNA (mtDNA) and single nucleotide polymorphism (SNP) data for 130 samples of Chiromantis rufescens. After estimating population structure and inferring species trees using coalescent methods, we tested demographic models to evaluate alternative population divergence histories that varied with respect to gene flow, population size change, and periods of isolation and secondary contact. Species distribution models were used to identify regions of climatic stability that could have served as forest refugia since the Last Interglacial. Results: Population structure within Chiromantis rufescens resembles the major biogeographic regions of the Guinean and Congolian forests. Coalescent-based phylogenetic analyses provide strong support for an early divergence between the western Upper Guinean forest and the remaining populations. Demographic inferences support diversification models with gene flow and population size changes even in cases where contemporary populations are currently allopatric, which provides support for forest refugia and barrier models. Species distribution models suggest that forest refugia were available for each of the populations throughout the Pleistocene. Main conclusions: Considering historical demography is essential for understanding population diversification, especially in complex landscapes such as those found in the Guineo-Congolian forest. Population demographic inferences help connect patterns of genetic variation to diversification model predictions. The diversification history of Chiromantis rufescens was shaped by a variety of processes, including vicariance from river barriers, forest fragmentation, and adaptive evolution along environmental gradients.
Supplementary datasets, data analysis code, and R tutorials for: Phylogenetic analysis of adaptation in comparative physiology and biomechanics: overview and a case study of thermal physiology in treefrogs
<p>Comparative phylogenetic studies of adaptation are uncommon in biomechanics and physiology. Such studies require collecting data from many species, a challenge when data collection is experimentally intensive. Moreover, researchers struggle to employ the most biologically appropriate phylogenetic tools for identifying adaptive evolution. Here, we detail an established but greatly underutilized phylogenetic comparative framework—the Ornstein-Uhlenbeck process—that explicitly models long-term adaptation. We discuss challenges in implementing and interpreting the model, and we outline potential solutions. We demonstrate use of the model through studying the evolution of thermal physiology in treefrogs. Frogs of the family Hylidae have twice colonized the temperate zone from the tropics, and such colonization likely involved a fundamental change in physiology due to colder and more seasonal temperatures. However, which traits changed to allow colonization is unclear. We measured cold-temperature tolerance and characterized thermal performance curves in jumping for twelve species of treefrogs distributed from the Neotropics to temperate North America. We then conducted phylogenetic comparative analyses to examine how tolerances and performance curves evolved and to test whether that evolution was adaptive. We found that tolerance to low temperatures increased with the transition to the temperate zone. In contrast, jumping well at colder temperatures was unrelated to biogeography and thus did not adapt during dispersal. Overall, our paper shows how comparative phylogenetic methods can be leveraged in biomechanics and physiology to test the evolutionary drivers of variation among species.</p>
Fig. 2 in Climatic niche, natural history, and conservation status of the Porthole Treefrog, Charadrahyla taeniopus (Günther, 1901) (Anura: Hylidae) in Mexico
Fig. 2. Current (A), and future 2050 (B) and 2070 (C) scenarios of the climatic niche of Charadrahyla taeniopus in Sierra Madre Oriental province (degraded area). The color scale indicates the probability of occupancy for the species.
Fig. 1 in Climatic niche, natural history, and conservation status of the Porthole Treefrog, Charadrahyla taeniopus (Günther, 1901) (Anura: Hylidae) in Mexico
Fig. 1. Female individual of Charadrahyla taeniopus (A) in a cloud forest and (B) at Tenango de Doria, Hidalgo, Mexico. Photos by Uriel Hernández-Salinas (A) and Raciel Cruz-Elizalde (B).
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>
Fig. 2 in Acquired and introduced macroparasites of the invasive Cuban treefrog, Osteopilus septentrionalis
Fig. 2. Prevalence, richness, and evenness (Simpson's Diversity Index) of parasites in male, female, and juvenile Cuban treefrogs, Osteopilus septentrionalis, collected from Tampa, FL.
Fig. 1 in Acquired and introduced macroparasites of the invasive Cuban treefrog, Osteopilus septentrionalis
Fig. 1. Mean (±SE) abundance (log transformed) and mean intensity (log transformed) of parasites in male, female, and juvenile Cuban treefrogs, Osteopilus septentrionalis, collected from Tampa, FL.
Fig. 2. Photographs. A in Chiggers (Acariformes: Trombiculoidea) do not increase rates of infection by Batrachochytrium dendrobatidis fungus in the endemic Dwarf Mexican Treefrog Tlalocohyla smithii (Anura: Hylidae)
Fig. 2. Photographs. A: restrained T. smithii specimen; B: anatomical areas of host (T.smithii) parasitized by Trombiculoidea chiggers; C: another specimen of T smithii in its natural habitat.
Fig. 1. Study area, showing November 2014 and 2016 in Chiggers (Acariformes: Trombiculoidea) do not increase rates of infection by Batrachochytrium dendrobatidis fungus in the endemic Dwarf Mexican Treefrog Tlalocohyla smithii (Anura: Hylidae)
Fig. 1. Study area, showing November 2014 and 2016 sampling sites. Gray and white circles show presence or absence of Batrachochytrium dendrobatidis. Sampling sites in 2010 and 2011 show fungus presence, reported by Cortes in 2014.
Fig. 3. Spectrograms and oscillograms for Dendropsophus vraemi. A–B in The distribution and calls of Vraem' Treefrog, Dendropsophus vraemi (Caminer, Milá, Jansen, Fouquet, Venegas, Chávez, Lougheed, and Ron 2017), with comments on its conservation status
Fig. 3. Spectrograms and oscillograms for Dendropsophus vraemi. A–B: variations of the advertisement call; C: an aggressive call. A, B and C are call variations from a single male individual (CORBIDI 17894) recorded in the middle Apurimac basin.
Fig. 2 in The distribution and calls of Vraem' Treefrog, Dendropsophus vraemi (Caminer, Milá, Jansen, Fouquet, Venegas, Chávez, Lougheed, and Ron 2017), with comments on its conservation status
Fig. 2. Dorsolateral and ventral views of Dendropsophus vraemi in life. A–B: CORBIDI 17894 (SVL = 26.4 mm); C–D: CORBIDI 17895 (SVL = 26.1 mm); E–F: CORBIDI 21857 (SVL = 22.8 mm); G–H: CORBIDI 21858 (SVL = 22.9 mm).
Fig. 1 in The distribution and calls of Vraem' Treefrog, Dendropsophus vraemi (Caminer, Milá, Jansen, Fouquet, Venegas, Chávez, Lougheed, and Ron 2017), with comments on its conservation status
Fig. 1. Geographic distribution map for Dendropsophus vraemi showing the type locality (green triangle; Caminer et al. 2017) and new localities in the middle and lower Apurimac basin (yellow circles), extending the range by 151 km to the northwest.
Fig. 3 in Zooplankton associated with phytotelms and treefrogs in a neotropical forest
Fig. 3. Non-metric multidimensional scaling (NMDS) ordination of the zooplankton species showing differences in composition between frogs' skin (grey circles) and bromeliad phytotelms (black circles). Dashed lines indicate the range of each community dispersion and solid lines indicate the distance of each sample from centroid.
Fig. 2 in Zooplankton associated with phytotelms and treefrogs in a neotropical forest
Fig. 2. Rarefaction curve considering zooplanktonic species frequency from both bromeliad tanks and frogs' skin in a Semideciduous Stationary Forest remnant, Pernambuco, Brazil.
Fig. 1 in Zooplankton associated with phytotelms and treefrogs in a neotropical forest
Fig. 1. Location of the conservation unit in the municipality of São LourenÇo da Mata, eastern region of Pernambuco, Brazil. In green, the forest was a sample of the study.
Linked collectors and determiners for: Integrative taxonomy reveals a new but common Neotropical treefrog, hidden under the name Boana xerophylla.
Natural history specimen data linked to collectors and determiners held within, "Integrative taxonomy reveals a new but common Neotropical treefrog, hidden under the name Boana xerophylla". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/65b99b7c-26bc-47ed-9978-aa64599181c1">https://bionomia.net/dataset/65b99b7c-26bc-47ed-9978-aa64599181c1</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/65b99b7c-26bc-47ed-9978-aa64599181c1">https://gbif.org/dataset/65b99b7c-26bc-47ed-9978-aa64599181c1</a>. Formatted as a Frictionless Data package.
Figure 11 in Molecular identification, description, and phylogenetic implications of the tadpoles of 11 species of Malagasy treefrogs, genus Boophis
Figure 11. Drawings of the tadpole of Boophis viridis (ZSM 574/2004). (a) Dorsal view; (b) lateral view; (c) oral disc.
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Allen Brain Atlas
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