Sounds of the northern Andes: the calls of a diverse and endangered frog community (Amphibia, Anura) from Ecuador

ZooKeys, Journal Year: 2025, Volume and Issue: 1224, P. 211 - 252

Published: Jan. 30, 2025

The emission of calls is one the most distinctive and important reproductive traits in anurans. Given biological significance vocalizations, this trait also useful for identification proposes key recognizing cryptic diversity. However, majority from tropical ecosystems, especially high Andean mountains, are unknown. Between 2016 2021, a total 14 expeditions were conducted to forests moorlands eastern western Mountain range province Carchi-Ecuador, at elevations ranging 2694 3848 m a.s.l. objective these was record anuran fauna present ecosystems. In total, 30 species recorded, 20 described, 15 which described reported first time study. call Hyloxalus delatorreae , critically endangered species, with remarkable recording Niceforonia brunnea considered mute. addition, nine candidate including Pristimantis farisorum Ecuador. This study represents comprehensive accurate acoustic documentation highland community, will facilitate taxonomic conservation work area.

Language: Английский

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The acoustic adaptation hypothesis across terrestrial vertebrates: a meta-analysis

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: Feb. 21, 2024

Acoustic communication plays a prominent role in various ecological and evolutionary processes involving social interactions. The properties of acoustic signals are thought to be influenced not only by the interaction between signaller receiver but also characteristics environment through which signal is transmitted. This conjecture forms core so-called "acoustic adaptation hypothesis" (AAH), posits that vegetation structure affects frequency temporal parameters emitted as function their degradation properties. Specifically, animals densely vegetated 'closed habitats' expected produce longer with lower repetition rates frequencies (minimum, mean, maximum, peak) compared ones inhabiting less 'open habitats'. To date, this hypothesis has received mixed results, level support depending on taxonomic group methodology used. We conducted systematic literature search empirical studies testing for an effect signalling assessed generality AAH using meta-analytic approach based 371 sizes from 75 57 taxa encompassing birds, mammals amphibians. Overall, our results do provide consistent AAH, neither within-species comparisons (suggesting no overall phenotypically plastic response structure) nor among-species response). However, when considering birds only, we found weak comparisons, was mainly driven measured bandwidth, suggesting variable may exhibit structure. For significant after excluding comparative did account phylogenetic non-independence. Collectively, synthesis does universal evolution communication. highlight need more work currently under-studied such amphibians, mammals, insects. Furthermore, propose framework future research AAH. specifically advocate detailed quantitative characterization habitats identify highest detection probability determine if greater distances preferentially Finally, stress tests should focus selected increased transmission distance.

Language: Английский

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Time and place affect the acoustic structure of frog advertisement calls

Current Zoology, Journal Year: 2024, Volume and Issue: 71(2), P. 196 - 204

Published: July 26, 2024

Abstract Acoustic communication signals are important for species recognition and mate attraction across numerous taxa. For instance, most of the thousands frogs have a species-specific advertisement call that females use to localize discriminate among potential mates. Thus, acoustic structure is critical reproductive success. The calls will generally diverge over evolutionary time can be influenced by sympatric species. While many studies shown influence geography on contemporary variation in populations frogs, no study has compared frog ask whether we detect an divergence overall geographic overlap differences species-typical observe now. To this end, features 225 within 4 families. Furthermore, used behavioral assay from 1 determine which prioritize our large-scale analyses. We found evidence both phylogeny (time) (place) relate acoustics albeit with large these relationships families analysis. Overall, results suggest that, despite ecological forces structure, broad place shape aspects acoustics.

Language: Английский

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Simplifying the Centrolene buckleyi complex (Amphibia: Anura: Centrolenidae): a taxonomic review and description of two new species

PeerJ, Journal Year: 2024, Volume and Issue: 12, P. e17712 - e17712

Published: Aug. 20, 2024

Centrolenidae is a Neotropical family widely distributed in Central and South America, with its species richness concentrated the tropical Andes. Several taxonomic problems have been identified within this family, mostly related to broad geographic distributions. In study, we assessed redefined boundaries of Centrolene buckleyi complex, formally described two new from Andes Ecuador. These taxa are recognized by combination morphometric, osteological, acoustic, genetic data. Following IUCN criteria, propose that should be considered as Endangered (EN), mainly because their small distributions habitat loss. The C. complex provides insights into biogeography closely Andean species. As other glassfrogs, speciation seems mediated linearity Andes, where gene flow can restricted topography and, also, local extinctions.

Language: Английский

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Meta‐analysis of the acoustic adaptation hypothesis reveals no support for the effect of vegetation structure on acoustic signalling across terrestrial vertebrates

Biological reviews/Biological reviews of the Cambridge Philosophical Society, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 12, 2024

ABSTRACT Acoustic communication plays a prominent role in various ecological and evolutionary processes involving social interactions. The properties of acoustic signals are thought to be influenced not only by the interaction between signaller receiver but also characteristics environment through which signal is transmitted. This conjecture forms core so‐called “acoustic adaptation hypothesis” (AAH), posits that vegetation structure affects frequency temporal parameters emitted as function their degradation properties. Specifically, animals densely vegetated “closed habitats” expected produce longer with lower repetition rates frequencies (minimum, mean, maximum, peak) compared those inhabiting less‐vegetated “open habitats”. To date, this hypothesis has received mixed results, level support depending on taxonomic group methodology used. We conducted systematic literature search empirical studies testing for an effect signalling assessed generality AAH using meta‐analytic approach based 371 sizes from 75 57 taxa encompassing birds, mammals amphibians. Overall, our results do provide consistent AAH, neither within‐species comparisons (suggesting no overall phenotypically plastic response structure) nor among‐species response). However, when considering birds only, we found weak comparisons, was mainly driven measured bandwidth, suggesting variable may exhibit structure. For significant after excluding comparative did account phylogenetic non‐independence. Collectively, synthesis does universal evolution communication. highlight need more work currently under‐studied such amphibians, mammals, insects. Furthermore, propose framework future research AAH. specifically advocate detailed quantitative characterisation habitats identify highest detection probability determine if greater distances preferentially Finally, stress tests should focus selected increased transmission distance.

Language: Английский

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A new glassfrog of the genus Centrolene (Amphibia, Centrolenidae) from the Subandean Kutukú Cordillera, eastern Ecuador

Zoosystematics and Evolution, Journal Year: 2024, Volume and Issue: 100(3), P. 923 - 939

Published: July 8, 2024

We describe a new species of Centrolene from the Subandean Cordillera Kutukú in southeastern Ecuador. The differs all other glassfrogs by combination following characters: presence processes vomers but without vomerine teeth; humeral spines males; dorsum green with light dots and dark marks; dorsal skin abundant tubercles; visceral peritonea translucent (except for pericardium); small body size (snout-vent length 21.5–21.9 mm adult males). is sister to camposi Western Andes southwestern Ecuador, together they form clade C. condor Cóndor Our time tree suggests that originated at end Pliocene. In addition, we present information zarza , expanding its geographic range across cordilleras, amending definition diagnosis, offering on natural history extinction risk. also discuss taxonomic status Ecuadorian populations reported as huilensis conclude are muelleri based their close phylogenetic relationships morphological similarity samples Peru. valid not closely related .

Language: Английский

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Geographical variation in the advertisement calls of Leptobrachella ventripunctata (Anura: Megophryidae) in Southwestern China

Asian Herpetological Research, Journal Year: 2024, Volume and Issue: 15(3), P. 140 - 151

Published: Sept. 1, 2024

Language: Английский

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Uncoupled Evolutionary Patterns in Spectral and Temporal Components of Acoustic Signals in Anurans Associated With Streams

Ethology, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 3, 2024

ABSTRACT The use of high‐pitched auditory signals by species communicating alongside noisy streams has been often considered an adaptation, yet studies testing this hypothesis have yielded inconclusive results. major challenge to quantify the proportion across‐species signal variation that could be attributed either common history (phylogenetic load) or adaptation. We further advance in approach comparing phylogenetic load between different components anuran calls. Because stream noise allegedly represents a stronger selective pressure for call frequency than temporal traits, we predicted weaker frequency, particularly taxa breed streams. first built using four mitochondrial genes on each three clades: genus Hyloscirtus and family Centrolenidae, which subfamily Phyllomedusinae, known at lentic water bodies. In parallel, compiled data advertisement calls 154 used them calculate Blomberg's K values as proxy (signal) traits. was spectral traits within weak absent both Phyllomedusine Against our expectations, strong but centrolenid Our results support uncoupled evolution They also indicate role abiotic varies among other factors must invoked fully understand among‐species

Language: Английский

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Allometric Constraint Predominates Over the Acoustic Adaptation Hypothesis in a Radiation of Neotropical Treefrogs

Integrative Zoology, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 10, 2024

Male frogs emit stereotypical advertisement calls to attract mates and deter conspecific rivals. The evolution of these is thought be linked anatomical constraints the acoustic characteristics their surroundings. adaptation hypothesis (AAH) posits that species evolve maximize propagation distance reduce signal degradation in environment where they are emitted. We applied phylogenetic comparative analyses study association body size, vegetation density, type aquatic ecosystem, calling site on traits Cophomantini, a large radiation Neotropical treefrogs (Hylidae). obtained analyzed acoustic, habitat data from total 112 (58% Cophomantini), using most inclusive available phylogeny. found significant negative correlation between peak frequency, site, but contrary predictions AAH, we did not find support for associations among call environmental characteristics. Although spectral allometry explained by an constraint, it could also maintained female choice. recommend future studies strive incorporate factors such as mate preferences, eavesdropping predators or parasites, genetic drift.

Language: Английский

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Unexplored Urban Diversity: A New Species of Adenomera (Anura, Leptodactylidae) Related to Adenomera ajurauna from the Atlantic Forest of Southeastern and Southern Brazil

Herpetologica, Journal Year: 2024, Volume and Issue: 80(3)

Published: July 29, 2024

Language: Английский

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