Geographic Variation in the Acoustic Signals of Dendropsophus nanus (Boulenger 1889) (Anura: Hylidae)

Annibale, Fabiane Santana; Sousa, Verônica Thiemi Tsutae de; Silva, Fernando Rodrigues da; Murphy, Christopher G.

doi:10.1655/herpetologica-d-19-00046.1

Cited by 3 publications

(2 citation statements)

References 81 publications

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“…The roles of environmental factors in acoustic divergence, especially habitat-or climate-driven call divergence, have been examined in some frogs with the expectation that acoustic signals evolve to increase the transmission efficiency within the habitats in which they are emitted (e.g. Bosch & De la Riva 2004;Annibale et al 2020;Röhr et al 2020;Zhao et al 2021). Anuran calls are relatively simple, and many studies on these simple signals have suggested that their geographic variation is correlated with the acoustic characteristics of different habitats.…”

Section: Discussionmentioning

confidence: 99%

Geographical variation of the acoustic signals in the spot‐legged treefrog (Polypedates megacephalus) of Hainan Island

et al. 2022

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Geographical divergence in acoustic signals is often affected by multiple selective pressures. Environmental factors are expected to shape signals by adjusting for greater propagation efficiency. Nevertheless, such habitat‐driven hypotheses have not been well‐examined with multi‐signal and multi‐habitat types included simultaneously. In this study, we evaluated call similarity of the spot‐legged treefrog (Polypedates megacephalus), characterized by multiple call types, from 11 geographic populations across Hainan Island. We also examined multiple factors (i.e. body mass, temperature, altitude, and vegetation) among different acoustical geographic clusters, and tested whether the variation in acoustic length and frequency among different habitats was in accordance with the prediction derived from the acoustic adaptation hypothesis. We showed that P. megacephalus from Hainan Island included 3 acoustic geographic clusters: the northeastern flatlands, the southwest mountains, and the hills around the mountains. We also showed that environmental factors (i.e. altitude and vegetation) varied across these 3 acoustically distinct areas. Moreover, the duration of the different call types supported the hypothesis that they should have optimal transmission in their own habitats. Thus, our results reveal the roles of ecological selection in the geographical divergence of anuran acoustic signals.

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Section: Discussionmentioning

confidence: 99%

Geographical variation of the acoustic signals in the spot‐legged treefrog (Polypedates megacephalus) of Hainan Island

et al. 2022

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“…This has been the case with taxa (cryptic) that share many similarities, but whose distinctions (mostly linked to colour, warts or tubercles, or sometimes by acoustic [not immune to variability] and genetic analysis) can be ambiguous and conceptually confusing. Additionally, those distinctions have not even been tested under any experimental model of diversification dynamics ( Ajmal Ali et al, 2014 ; Annibale et al, 2020 ; Schindel & Miller, 2005 ; Van Holstein & Foley, 2020 ), where patterns of trait richness are equivalent to the rates of intraspecific population divergence (and would thus reinforce the divergence hypotheses). This is mainly the case for species of the P. goyana and P. cristiceps groups ( Martins & Giaretta, 2011 ); but why not then for the P. biggibosa , P. boei and P. appendiculata groups, whose taxonomic histories depend on variable phenetic traits, while evidence of pre- or post-zygotic barriers or their biogeographies continue to be elusive?…”

Section: Discussionmentioning

confidence: 99%

Polymorphism in a Neotropical toad species: ontogenetic, populational and geographic approaches to chromatic variation inProceratophrys cristiceps(Müller, 1883) (Amphibia, Anura, Odontophrynidae)

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et al. 2022

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Quantifying variability is important for understanding how evolution operates in polymorphic species such as those of the genus Proceratophrys Miranda-Ribeiro, 1920, which is widely distributed in South America. P. cristiceps distribution is limited to the Caatinga biome in Brazil. We examined its chromatic variation from a populational perspective, looking at different phenetic polymorphism levels and probable chromotypic association by applying statistical and GIS tools that could facilitate future taxonomic research regarding this and other species. We characterized P. cristiceps colour patterns and re-evaluated its geographic variation, highlighting potential consequences for the taxonomy of the genus. Our results revealed six principle chromotypes whose frequencies varied among sex and ontogenetic classes. Phenotypic expression appeared to respect defined proportions and evidenced selective value for the species. We conclude that individual variation, together with typological traditionalism may overestimate the polymorphic magnitude at the population level and cause taxonomic inflation. Our data support the usefulness of P. cristiceps as a model for microevolutionary studies.

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Neural activities in music frogs reveal call variations and phylogenetic relationships within the genus Nidirana

et al. 2022

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The characteristics of acoustic signals co-evolve with preferences of the auditory sensory system. However, how the brain perceives call variations and whether it can reveal phylogenetic relationships among signalers remains poorly understood. Here, we recorded the neural signals from the Emei music frogs (Nidirana daunchina) in response to broadcasted calls of five different species of the same genus. We found that responses in terms of the different amplitudes of various event-related potential (ERP) components were correlated with diversification trends in acoustic signals, as well as phylogenetic relationships between N. daunchina and heterospecific callers. Specifically, P2 decreased gradually along the ordinal decline of similarities in acoustic characteristics of calls compared with those from conspecifics. Moreover, P3a amplitudes showed increasing trends in correspondence with callers’ genetic distances from the subject species. These observations collectively support the view that neural activities in music frogs can reflect call variations and phylogenetic relationships within the genus Nidirana.

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Geographic Variation in the Acoustic Signals of Dendropsophus nanus (Boulenger 1889) (Anura: Hylidae)

Cited by 3 publications

References 81 publications

Geographical variation of the acoustic signals in the spot‐legged treefrog (Polypedates megacephalus) of Hainan Island

Geographical variation of the acoustic signals in the spot‐legged treefrog (Polypedates megacephalus) of Hainan Island

Polymorphism in a Neotropical toad species: ontogenetic, populational and geographic approaches to chromatic variation inProceratophrys cristiceps(Müller, 1883) (Amphibia, Anura, Odontophrynidae)

Neural activities in music frogs reveal call variations and phylogenetic relationships within the genus Nidirana

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