Unlinking the Speciation Steps: Geographical Factors Drive Changes in Sexual Signals of an Amazonian Nurse-Frog Through Body Size Variation

Fernandes, Igor Yuri; Moraes, Leandro João Carneiro de Lima; Menin, Marcelo; Farias, Izeni Pires; Lima, Albertina P.; Kaefer, Ígor Luís

doi:10.1007/s11692-020-09525-7

Cited by 10 publications

(7 citation statements)

References 72 publications

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“…Loss of a territory to a rival male can result in the complete loss of reproduction, with little chance to compensate in the following season because only ~ 20% of all adults survive until the next reproductive season 28 . Therefore, all individuals should show a high level of territorial aggression towards any intruder to maintain territory ownership, which is corroborated by an absence of a ‘dear-enemy’ effect in A. femoralis 49 . But territorial defense is costly 61 – 63 , and while highly aggressive individuals might have an advantage in repelling competitors, they likely suffer from generally higher energetic expenditures from more aggressive interactions, and particularly costly escalations against competitors they are unlikely to repel.…”

Section: Discussionmentioning

confidence: 77%

“…Thereby we created two stimuli close to the extremes of the natural peak frequency range of the species (2900–3900 Hz) that has been established in previous studies 42 , 43 , 48 ). Following the common assumption of a (quasi) linear relationship between call frequency and body size within a given species [see 43 , 49 for Allobates , 50 for tree frogs, 51 for frog in general] our signals mimicked a particularly large (low frequency call) and a particularly small (high frequency call) intruder at the both extremes of the natural size variation.…”

Section: Methodsmentioning

confidence: 99%

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Regardless of personality, males show similar levels of plasticity in territory defense in a Neotropical poison frog

Peignier

Bégué

Ringler

et al. 2023

Sci Rep

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Animal personality traits are sometimes linked to an individual’s degree of plasticity, with certain personality types being more plastic than others. In territorial species, consistently high levels of aggression might increase the risk of harmful fights, while consistently low aggression might lead to the loss of a territory. Consequently, reacting plastically with an appropriate territorial response should be beneficial to avoid these risks. An integrative investigation of both personality traits and plasticity can help us better understand the dynamics of aggressive interactions during male-male competition. Here, we used a free-ranging Neotropical poison frog population to investigate the role of plasticity in male territorial aggression towards intruders. We conducted repeated standardized territorial intrusion experiments mimicking frogs of different body sizes via playback calls with different peak frequencies. We found individual repeatability for the latency to reach and approach a simulated intruder and observed that both aggressive and less aggressive males decreased their level of aggression towards big intruders. However, our results do not support a correlation between personality and plasticity in the context of male territory defense during the breeding season. We discuss how such a correlation between personality and plasticity might be conditional on the costs and benefits across contexts.

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Section: Discussionmentioning

confidence: 77%

Section: Methodsmentioning

confidence: 99%

Regardless of personality, males show similar levels of plasticity in territory defense in a Neotropical poison frog

Peignier

Bégué

Ringler

et al. 2023

Sci Rep

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“…This is unlikely to have impacted our ability to test the AAH, as on a continental scale, most variation in temperature is likely to have been encompassed by geographical location, and potentially reflecting geographical clines in ambient temperature (e.g. Fernandes et al., 2021).…”

Section: Discussionmentioning

confidence: 99%

“…Additionally, vocal learning is a common aspect of avian communication systems, with intraspecific variation in bird calls often attributed to inter‐populational differences in learnt signals (Searfoss et al., 2020). A more suitable study taxon for examining the AAH may be frogs, as they have relatively low vagility, tending to be confined to the microhabitats in which they evolved (Fernandes et al., 2021; Sinsch, 1990; Zimmerman, 1983). As such, the acoustic signals of frogs may reflect local adaptation to specific environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the acoustic adaptation hypothesis in frogs using large‐scale citizen science data

Gillard

Rowley

2023

Journal of Zoology

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Acoustic communication is vital to the survival and fitness of many vertebrates. While successful communication is reliant on acoustic signals reaching an intended receiver and maintaining content fidelity, propagating signals are attenuated by environmental factors such as habitat type. The acoustic adaptation hypothesis (AAH) predicts that the acoustic properties of signals are selected for optimal transmission in the habitats in which they propagate. To date, consistent evidence to support the theory is lacking, but studies have typically been primarily based on localized datasets with small sample sizes. Citizen science is emerging as a potential means to overcome the challenges associated with broad‐scale sampling, allowing us to assess the validity of the AAH in frogs on a continental scale. We analysed the male advertisement calls of 674 individual banjo frogs (Limnodynastes dorsalis, L. dumerilii, L. interioris and L. terraereginae) from across their range, pairing these citizen science data with remotely sensed measures of habitat complexity. While we detected considerable variation in acoustic structure within and among banjo frog species, this was not strongly correlated with habitat complexity. Thus, we found no support for the AAH. However, with our study spanning an area of over 1.7 million km2, we conducted the largest‐scale test of the AAH in frogs to date, contributing to the global understanding of acoustic signal evolution.

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“…Phylogeographic studies focusing on aromobatids from the Brazilian Amazon have frequently demonstrated that intraspecific diversification is common, especially within widely distributed species, and can often lead to the identification of candidate species (Amézquita et al 2009, Simões et al 2010, Kaefer et al 2013, Maia et al 2017, Réjaud et al 2020, Fernandes et al 2021. Nonetheless, there are relatively fewer studies focused on dendrobatids in the same region, for which the broad distributions currently proposed may reflect underestimation of local biodiversity due mainly to: (1) scarcity of faunal surveys in not very accessible areas where probable occurrence of a particular species has been attributed, and (2) scarcity of phylogeographic and taxonomic studies focused on the diversity of potential species complexes (Noonan & Gaucher 2006, Wollenberg et al 2006, Rojas et al 2020, de Medeiros et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Distribution and diversification of Adelphobates, emblematic poison frogs from Brazilian Amazonia

MEDEIROS,

GENTIL,

KAEFER

et al. 2024

An. Acad. Bras. Ciênc.

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Adelphobates contains three species, and the inaccurate identification of A. quinquevittatus and the scarcity of records of A. castaneoticus complicate inference of their distributions; the latter species occurs in sympatry with A. galactonotus. Our objective was to revise the distributions of Adelphobates by compiling data and modeling habitat suitability, as range limits may be shaped by landscape features and biotic interactions.We initially analyzed the existence of operational taxonomic units within the nominal species and subsequently inferred the observed and potential distributions, taking into account the possible independent lineages for the three species, and we also generated a molecular timetree to understand the chronology of interspecific diversification events. Adelphobates quinquevittatus was found to have a more easterly distribution than previously described, and specimens with phenotypic variation were found to occur in areas inconsistent with the modeling, and A. castaneoticus was concentrated in the Tapajós-Xingu interfluve, surrounded by A. galactonotus. Models indicated that the right bank of the Xingu River is suitable for both species, indeed, both were found there.Despite Adelphobates species having their distributions delimited by major Amazonian rivers, estimated divergence times predate the formation of the modern river network, suggesting that other mechanisms were involved in their diversification.

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Unlinking the Speciation Steps: Geographical Factors Drive Changes in Sexual Signals of an Amazonian Nurse-Frog Through Body Size Variation

Cited by 10 publications

References 72 publications

Regardless of personality, males show similar levels of plasticity in territory defense in a Neotropical poison frog

Regardless of personality, males show similar levels of plasticity in territory defense in a Neotropical poison frog

Assessment of the acoustic adaptation hypothesis in frogs using large‐scale citizen science data

Distribution and diversification of Adelphobates, emblematic poison frogs from Brazilian Amazonia

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