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Maria B, Tonini JF, Rebouças R, Toledo LF. Hidden shifts in allometry scaling between sound production and perception in anurans. PeerJ 2023; 11:e16322. [PMID: 37941929 PMCID: PMC10629387 DOI: 10.7717/peerj.16322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Accepted: 09/29/2023] [Indexed: 11/10/2023] Open
Abstract
Background Animal communication consists of signal production and perception, which are crucial for social interactions. The main form used by anurans is auditory communication, in most cases produced as advertisement calls. Furthermore, sound perception happens mainly through an external tympanic membrane, and plays an important role in social behavior. In this study, we evaluated the influence of body and tympanic membrane sizes on call frequency across the phylogeny of anurans. Methods We use data on snout-vent length, tympanic membrane diameter, and dominant frequency of the advertisement call from the literature and from natural history museum collections. We mapped these traits across the anuran phylogeny and tested different models of diversification. Our final dataset includes data on body size, tympanic membrane size, and call dominant frequency of 735 anuran species. Results The best explanatory model includes body and tympanum size with no interaction term. Although our results show that call frequency is strongly constrained by body and tympanum size, we identify five evolutionary shifts in allometry from that ancestral constraint. We relate these evolutionary shifts to the background noise experienced by populations. Body size is important for myriad ecological interactions and tympanum size is strongly associated with female call frequency preferences. Thus, allometric escape in frog calls might arise through environmental selection such as breeding in fast flowing or soundscape competition, as well as sexual selection linked to tympanum size.
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Affiliation(s)
- Bruna Maria
- Laboratório de História Natural de Anfíbios Brasileiros, Universidade Estadual de Campinas, Campinas, São Paulo, Brasil
| | - João F.R. Tonini
- Department of Biology, University of Richmond, Richmond, VA, United States of America
| | - Raoni Rebouças
- Laboratório de História Natural de Anfíbios Brasileiros, Universidade Estadual de Campinas, Campinas, São Paulo, Brasil
- Laboratório de Ecologia Evolutiva de Anfíbios, Universidade Federal de Juiz de Fora, Juiz de Fora, Minas Gerais, Brazil
- Programa de Pós Graduação em Biologia Animal, Universidade Estadual de Campinas, Campinas, São Paulo, Brazil
| | - Luís Felipe Toledo
- Laboratório de História Natural de Anfíbios Brasileiros, Universidade Estadual de Campinas, Campinas, São Paulo, Brasil
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Womack MC, Hoke KL. Convergent Anuran Middle Ear Loss Lacks a Universal, Adaptive Explanation. BRAIN, BEHAVIOR AND EVOLUTION 2023; 98:290-301. [PMID: 37913755 PMCID: PMC10885836 DOI: 10.1159/000534936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 10/27/2023] [Indexed: 11/03/2023]
Abstract
INTRODUCTION Shared selection pressures often explain convergent trait loss, yet anurans (frogs and toads) have lost their middle ears at least 38 times with no obvious shared selection pressures unifying "earless" taxa. Anuran tympanic middle ear loss is especially perplexing because acoustic communication is dominant within Anura and tympanic middle ears enhance airborne hearing in most tetrapods. METHODS Here, we use phylogenetic comparative methods to examine whether particular geographic ranges, microhabitats, activity patterns, or aspects of acoustic communication are associated with anuran tympanic middle ear loss. RESULTS Although we find some differences between the geographic ranges of eared and earless species on average, there is plenty of overlap between the geographic distributions of eared and earless species. Additionally, we find a higher prevalence of diurnality in earless species, but not all earless species are diurnal. We find no universal adaptive explanation for the many instances of anuran tympanic middle ear loss. CONCLUSION The puzzling lack of universally shared selection pressures among earless species motivates discussion of alternative hypotheses, including genetic or developmental constraints, and the possibility that tympanic middle ear loss is maladaptive.
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Affiliation(s)
| | - Kim L. Hoke
- Biology Department, Colorado State University, Fort Collins, CO, USA
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Data collected by citizen scientists reveal the role of climate and phylogeny on the frequency of shelter types used by frogs across the Americas. ZOOLOGY 2022; 155:126052. [PMID: 36152596 DOI: 10.1016/j.zool.2022.126052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 09/05/2022] [Accepted: 09/06/2022] [Indexed: 01/25/2023]
Abstract
Shelters are microhabitats where animals rest and hide. These microhabitats can be used from short daily periods to long-term estivation or hibernation. Environmental conditions and the phenotypical characteristics of the animal drive habitat selection in relation to shelters. Based on this, climate regions and phylogeny are expected to affect the use of different shelter types. Although shelters are yet to be described for most anuran species, a variety of microhabitats have already been reported as shelter-sites, including dense vegetation, rock crevices, and holes in the ground. In this study, we evaluated photos of frogs for sheltering behaviour from 29 countries in the Americas deposited on the popular citizen-science platform, iNaturalist. We compared the frequency of use of different shelter types identified on the photos among different climate regions and anuran families, also testing possible phylogenetic signals. We identified 11,133 photographs of 378 frog species showing individuals hiding in shelters or in a resting position. We classified observations into 10 shelter types, with live vegetation (24.7 %) being the most commonly recorded natural shelter, followed by hole in the ground (11.4 %) and tree trunk (11.1 %). The use of different shelter types varied between arid and humid climates, and also among different anuran families. We found strong phylogenetic signal for three shelter types (hole in the ground, live vegetation, and water) and the differences in shelter use among taxa suggest a relation with body characteristics. Approximately 47 % of observations of threatened and near threatened species were in hole in the ground, while artificial habitat represented only 3.6 % of the observations in this group. The daily pattern of shelter use corroborated the nocturnal activity of most species. Our findings also expanded the description of shelter sites for 330 species that had no published information on this behaviour. This study contributes to our current knowledge about animal behaviour and highlights the use of citizen science as an effective approach to understand the natural history of amphibians at a large scale.
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Rebouças R. White-edged cowards: high-pitched treefrogs will be attacked by those with orange legs. BEHAVIOUR 2022. [DOI: 10.1163/1568539x-bja10187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Abstract
Anurans are one of the most diverse groups of animals, with single and multi-modal communication forms commonly used to settle disputes over territory and to attract females. Thus, I aimed to evaluate if male white-edged treefrogs tend to attack smaller individuals and which morphometric factor is related to it. Advertisement calls of this species were recorded and used in a four-choice experiment with the emission of artificially designed calls. I evaluated which speaker individuals approached and if morphometric variables could predict it. I observed that individuals approached significantly more often towards the high-pitched call than other treatments, and the frequency to do so was predicted by the extension of orange colour in their legs. These results indicate that smaller individuals are actively excluded from calling sites.
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Affiliation(s)
- Raoni Rebouças
- Laboratório de História Natural de Anfíbios Brasileiros (LaHNAB), Departamento de Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas, Campinas, São Paulo, 13083-862, Brazil
- Programa de Pós-Graduação em Biologia Animal, Universidade Estadual de Campinas, Campinas, São Paulo, 13083-862, Brazil
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Lima NDAP, Rebouças R, Toledo LF, Lisboa CS. Influence of urban noise in call traits of the Atlantic Forest treefrog Bokermannohyla hylax. ZOOL ANZ 2022. [DOI: 10.1016/j.jcz.2022.07.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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6
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Torrent frogs emit acoustic signals of a narrower spectral range in habitats with longer-lasting biotic background noise. Behav Processes 2022; 200:104700. [DOI: 10.1016/j.beproc.2022.104700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 06/29/2022] [Accepted: 07/01/2022] [Indexed: 11/19/2022]
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Duarte-Marín S, Rada M, Rivera-Correa M, Caorsi V, Barona E, González-Durán G, Vargas-Salinas F. Tic, Tii and Trii calls: advertisement call descriptions for eight glass frogs from Colombia and analysis of the structure of auditory signals in Centrolenidae. BIOACOUSTICS 2022. [DOI: 10.1080/09524622.2022.2077833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- Sebastián Duarte-Marín
- Conservación (EECO), Programa de Biología, Universidad del Quindío Grupo Evolución, Ecología y, Armenia, Colombia
- Entropía Co, Pereira, Colombia
| | - Marco Rada
- Laboratório de Anfibios, Departamento de Zoologia, Instituto de Biociências, Universidade de São Paulo, São Paulo, Brazil
- Instituto de Investigación de Recursos Biológicos Alexander von Humboldt, Bogotá, Colombia
| | - Mauricio Rivera-Correa
- Laboratorio de Anfibios, Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Bogotá, Colombia
| | - Valentina Caorsi
- Programa de Pós-Graduação em Biologia Animal, Departamento de Zoologia, Instituto de Biociências, Universidade Federal de Rio Grande do Sul (UFGRS), Porto Alegre, Brasil
| | - Eliana Barona
- Instituto de Investigación de Recursos Biológicos Alexander von Humboldt, Villa de Leyva, Colombia
| | | | - Fernando Vargas-Salinas
- Conservación (EECO), Programa de Biología, Universidad del Quindío Grupo Evolución, Ecología y, Armenia, Colombia
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Ziermann JM, Fratani J. Fascinating adaptations in amphibians. ZOOL ANZ 2022. [DOI: 10.1016/j.jcz.2022.04.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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10
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Allen-Ankins S, Schwarzkopf L. Using citizen science to test for acoustic niche partitioning in frogs. Sci Rep 2022; 12:2447. [PMID: 35165349 PMCID: PMC8844063 DOI: 10.1038/s41598-022-06396-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 01/17/2022] [Indexed: 11/22/2022] Open
Abstract
The acoustic niche hypothesis proposes that to avoid interference with breeding signals, vocal species should evolve to partition acoustic space, minimising similarity with co-occurring signals. Tests of the acoustic niche hypothesis are typically conducted using a single assemblage, with mixed outcomes, but if the process is evolutionarily important, a pattern of reduced acoustic competition should emerge, on average, over many communities. Using a continental-scale dataset derived from audio recordings collected by citizen scientists, we show that frogs do partition acoustic space. Differences in calls were predominately caused by differences in spectral, rather than temporal, features. Specifically, the 90% frequency bandwidths of observed frog assemblages overlapped less than expected, and there was greater distance between dominant frequencies than expected. To our knowledge, this study is the first to use null models to test for acoustic niche partitioning over a large geographic scale.
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Rueda-Solano LA, Vargas-Salinas F, Pérez-González JL, Sánchez-Ferreira A, Ramírez-Guerra A, Navas CA, Crawford AJ. Mate-guarding behaviour in anurans: intrasexual selection and the evolution of prolonged amplexus in the harlequin toad Atelopus laetissimus. Anim Behav 2022. [DOI: 10.1016/j.anbehav.2021.12.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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12
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Labra A, Reyes‐Olivares C, Moreno‐Gómez FN, Velásquez NA, Penna M, Delano PH, Narins PM. Geographic variation in the matching between call characteristics and tympanic sensitivity in the Weeping lizard. Ecol Evol 2021; 11:18633-18650. [PMID: 35003698 PMCID: PMC8717325 DOI: 10.1002/ece3.8469] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 11/28/2021] [Accepted: 12/02/2021] [Indexed: 11/21/2022] Open
Abstract
Effective communication requires a match among signal characteristics, environmental conditions, and receptor tuning and decoding. The degree of matching, however, can vary, among others due to different selective pressures affecting the communication components. For evolutionary novelties, strong selective pressures are likely to act upon the signal and receptor to promote a tight match among them. We test this prediction by exploring the coupling between the acoustic signals and auditory sensitivity in Liolaemus chiliensis, the Weeping lizard, the only one of more than 285 Liolaemus species that vocalizes. Individuals emit distress calls that convey information of predation risk to conspecifics, which may respond with antipredator behaviors upon hearing calls. Specifically, we explored the match between spectral characteristics of the distress calls and the tympanic sensitivities of two populations separated by more than 700 km, for which previous data suggested variation in their distress calls. We found that populations differed in signal and receptor characteristics and that this signal variation was explained by population differences in body size. No precise match occurred between the communication components studied, and populations differed in the degree of such correspondence. We suggest that this difference in matching between populations relates to evolutionary processes affecting the Weeping lizard distress calls.
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Affiliation(s)
- Antonieta Labra
- Department of BiosciencesCentre for Ecological and Evolutionary Synthesis (CEES)University of OsloOsloNorway
| | - Claudio Reyes‐Olivares
- Programa de Fisiología y BiofísicaInstituto de Ciencias BiomédicasFacultad de MedicinaUniversidad de ChileSantiago de ChileChile
| | - Felipe N. Moreno‐Gómez
- Departamento de Biología y QuímicaFacultad de Ciencias BásicasUniversidad Católica del MauleTalcaChile
| | - Nelson A. Velásquez
- Departamento de Biología y QuímicaFacultad de Ciencias BásicasUniversidad Católica del MauleTalcaChile
| | - Mario Penna
- Programa de Fisiología y BiofísicaInstituto de Ciencias BiomédicasFacultad de MedicinaUniversidad de ChileSantiago de ChileChile
| | - Paul H. Delano
- Departamento de NeurocienciaFacultad de MedicinaUniversidad de ChileSantiagoChile
- Centro Avanzado de Ingeniería Eléctrica y ElectrónicaAC3EUniversidad Técnica Federico Santa MaríaValparaísoChile
| | - Peter M. Narins
- Department of Integrative Biology & PhysiologyUniversity of California Los AngelesLos AngelesCaliforniaUSA
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Augusto-Alves G, Dena S, Toledo LF. Acoustic allometry, background stream noise and its relationship with large-bodied and voiceless rheophilic frogs. ZOOL ANZ 2021. [DOI: 10.1016/j.jcz.2021.10.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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de Mello Bezerra A, Potsch de Carvalho-e-Silva S, Pedreira Gonzaga L. Evolution of acoustic signals in Neotropical leaf frogs. Anim Behav 2021. [DOI: 10.1016/j.anbehav.2021.08.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Goyes Vallejos J, Gomez J, Hernández-Figueroa AD, Vera R, Green DM. Fertilization success suggests random pairing in frogs with regard to body size. Behav Ecol Sociobiol 2021. [DOI: 10.1007/s00265-021-03081-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Liu G, Rowley JJL, Kingsford RT, Callaghan CT. Species' traits drive amphibian tolerance to anthropogenic habitat modification. GLOBAL CHANGE BIOLOGY 2021; 27:3120-3132. [PMID: 33939215 DOI: 10.1111/gcb.15623] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 02/28/2021] [Indexed: 06/12/2023]
Abstract
Anthropogenic habitat modification is accelerating, threatening the world's biodiversity. Understanding species' responses to anthropogenic modification is vital for halting species' declines. However, this information is lacking for globally threatened amphibians, informed primarily by small community-level studies. We integrated >126,000 verified citizen science observations of frogs, with a global continuous measure of anthropogenic habitat modification for a continental scale analysis of the effects of habitat modification on frogs. We derived a modification tolerance index-accounting for anthropogenic stressors such as human habitation, agriculture, transport and energy production-for 87 species (36% of all Australian frog species). We used this index to quantify and rank each species' tolerance of anthropogenic habitat modification, then compiled traits of all the frog species and assessed how well these equipped species to tolerate modified habitats. Most of Australia's frog species examined were adversely affected by habitat modification. Habitat specialists and species with large geographic range sizes were the least tolerant of habitat modification. Call dominant frequency, body size, clutch type and calling position (i.e. from vegetation) were also related to tolerance of habitat modification. There is an urgent need for improved consideration of anthropogenic impacts and improved conservation measures to ensure the long-term persistence of frog populations, particularly focused on specialists and species identified as intolerant of modified habitats.
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Affiliation(s)
- Gracie Liu
- Centre for Ecosystem Science, School of Biological, Earth and Environmental Sciences, UNSW Sydney, Sydney, NSW, Australia
- Australian Museum Research Institute, Australian Museum, Sydney, NSW, Australia
| | - Jodi J L Rowley
- Centre for Ecosystem Science, School of Biological, Earth and Environmental Sciences, UNSW Sydney, Sydney, NSW, Australia
- Australian Museum Research Institute, Australian Museum, Sydney, NSW, Australia
| | - Richard T Kingsford
- Centre for Ecosystem Science, School of Biological, Earth and Environmental Sciences, UNSW Sydney, Sydney, NSW, Australia
| | - Corey T Callaghan
- Centre for Ecosystem Science, School of Biological, Earth and Environmental Sciences, UNSW Sydney, Sydney, NSW, Australia
- Ecology & Evolution Research Centre, School of Biological, Earth and Environmental Sciences, UNSW Sydney, Sydney, NSW, Australia
- Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic
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Foratto RM, Llusia D, Toledo LF, Forti LR. Treefrogs adjust their acoustic signals in response to harmonics structure of intruder calls. Behav Ecol 2021. [DOI: 10.1093/beheco/araa135] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Spectral properties of animal acoustic signals may help individuals to assess the characteristics of rivals and to adjust their competitive strategies in territorial disputes. Thus, we hypothesized that the distribution of energy across frequency bands in anuran calls determines behavioral responses in male–male competition. Using playback experiments, we investigated the relevance of the harmonic calls in the acoustic communication of the treefrog Dendropsophus minutus. We exposed territorial males to three synthetic acoustic stimuli composed of aggressive notes: 1) standard call (all harmonics and peak frequency corresponding to the second band); 2) inverted-energy call (all harmonics and peak frequency corresponding to the first band); and 3) concentrated-energy call (all energy contained in the second harmonic). Males responded aggressively to all stimuli, mainly by increasing the rate and duration of their aggressive notes. However, when exposed to stimuli with different harmonic configurations, males changed the harmonic structure of their own calls, emitting more A- and B-notes with peak power in the fundamental frequency, particularly when exposed to the concentrated-energy call. Our results suggest that male frogs may use the harmonic structure of calls to assess opponents and modulate territorial and aggressive behavior, triggering complex acoustic adjustments. This study contributes to our knowledge about the functions of acoustic traits in amphibian social interactions, and particularly of the presence of harmonics that has received less attention compared to other acoustic properties in the study of animal acoustic communication.
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Affiliation(s)
- Roseli Maria Foratto
- Programa de Pós-Graduação em Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas, Caixa Postal 6109, 13083–970, R. Monteiro Lobato, 255, Barão Geraldo, Campinas, São Paulo, Brazil
- Laboratório Multiusuário de Bioacústica (LMBio) and Laboratório de História Natural de Anfíbios Brasileiros (LaHNAB), Departamento de Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas, Caixa Postal 6109, 13083–970, R. Monteiro Lobato, 255, Barão Geraldo, Campinas, São Paulo, Brazil
| | - Diego Llusia
- Terrestrial Ecology Group (TEG), Departamento de Ecología, Facultad de Ciencias, Universidad Autónoma de Madrid (UAM), Ciudad Universitaria de Cantoblanco, Calle Darwin, 2, 28049, Madrid, Spain
- Centro de Investigación en Biodiversidad y Cambio Global (CIBC-UAM), Universidad Autónoma de Madrid, Calle Darwin, 2, 28049, Madrid, Spain
- Departamento de Ecologia, Laboratório de Herpetologia e Comportamento Animal, Instituto de Ciências Biológicas, Universidade Federal de Goiás (UFG), Campus Samambaia, Avenida Esperança, S/N - 74001-970 Goiânia, GO, Brazil
| | - Luís Felipe Toledo
- Programa de Pós-Graduação em Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas, Caixa Postal 6109, 13083–970, R. Monteiro Lobato, 255, Barão Geraldo, Campinas, São Paulo, Brazil
- Laboratório Multiusuário de Bioacústica (LMBio) and Laboratório de História Natural de Anfíbios Brasileiros (LaHNAB), Departamento de Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas, Caixa Postal 6109, 13083–970, R. Monteiro Lobato, 255, Barão Geraldo, Campinas, São Paulo, Brazil
| | - Lucas Rodriguez Forti
- Laboratório Multiusuário de Bioacústica (LMBio) and Laboratório de História Natural de Anfíbios Brasileiros (LaHNAB), Departamento de Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas, Caixa Postal 6109, 13083–970, R. Monteiro Lobato, 255, Barão Geraldo, Campinas, São Paulo, Brazil
- Instituto de Biologia, Universidade Federal da Bahia, Campus de Ondina, R. Barão de Jeremoabo, 668, Salvador, BA, Brazil
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Sugai LSM, Llusia D, Siqueira T, Silva TSF. Revisiting the drivers of acoustic similarities in tropical anuran assemblages. Ecology 2021; 102:e03380. [PMID: 33937979 DOI: 10.1002/ecy.3380] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 02/12/2021] [Accepted: 03/16/2021] [Indexed: 01/04/2023]
Abstract
Acoustic signaling is key in mediating mate choice, which directly impacts individual fitness. Because background noise and habitat structure can impair signal transmission, the acoustic space of mixed-species assemblages has long been hypothesized to reflect selective pressures against signal interference and degradation. However, other potential drivers that received far less attention can drive similar outputs on the acoustic space. Phylogenetic niche conservatism and allometric constraints may also modulate species acoustic features, and the acoustic space of communities could be a side-effect of ecological assembly processes involving other traits (e.g., environmental filtering). Additionally, the acoustic space can also reflect the sorting of species relying on public information through extended communication networks. Using an integrative approach, we revisit the potential drivers of the acoustic space by addressing the distribution of acoustic traits, body size, and phylogenetic relatedness in tropical anuran assemblages across gradients of environmental heterogeneity in the Pantanal wetlands. We found the overall acoustic space to be aggregated compared with null expectations, even when accounting for confounding effects of body size. Across assemblages, acoustic and phylogenetic differences were positively related, while acoustic and body size similarities were negatively related, although to a minor extent. We suggest that acoustic partitioning, acoustic adaptation, and allometric constraints play a minor role in shaping the acoustic output of tropical anuran assemblages and that phylogenetic niche conservatism and public information use would influence between-assemblage variation. Our findings highlight an overlooked multivariate nature of the acoustic dimension and underscore the importance of including the ecological context of communities to understand drivers of the acoustic space.
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Affiliation(s)
- Larissa Sayuri Moreira Sugai
- Instituto de Biociências, Universidade Estadual Paulista (Unesp), Rio Claro, São Paulo, 13506-900, Brazil.,Terrestrial Ecology Group (TEG), Departamento de Ecología, Ciudad Universitaria de Cantoblanco, Facultad de Ciencias, Universidad Autónoma de Madrid, C/Darwin, 2, Edificio de Biología, C-211, Madrid, 28049, Spain
| | - Diego Llusia
- Terrestrial Ecology Group (TEG), Departamento de Ecología, Ciudad Universitaria de Cantoblanco, Facultad de Ciencias, Universidad Autónoma de Madrid, C/Darwin, 2, Edificio de Biología, C-211, Madrid, 28049, Spain.,Laboratório de Herpetologia e Comportamento Animal, Departamento de Ecologia, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Campus Samambaia, Goiânia, Goiás, CEP, 74001-970, Brazil.,Centro de Investigación en Biodiversidad y Cambio Global, Ciudad Universitaria de Cantoblanco, Universidad Autónoma de Madrid, C/Darwin 2, Madrid, E-28049, Spain
| | - Tadeu Siqueira
- Instituto de Biociências, Universidade Estadual Paulista (Unesp), Rio Claro, São Paulo, 13506-900, Brazil
| | - Thiago S F Silva
- Instituto de Biociências, Universidade Estadual Paulista (Unesp), Rio Claro, São Paulo, 13506-900, Brazil.,Biological and Environmental Sciences, Faculty of Natural Sciences, University of Stirling, Stirling, United Kingdom
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Jiménez-Vargas GM, Vargas-Salinas F. Does anthropogenic noise promotes advertisement call adjustments in the rubí poison frog Andinobates bombetes? BEHAVIOUR 2021. [DOI: 10.1163/1568539x-bja10080] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Abstract
Anthropogenic noise, characterized by higher intensities at low frequencies, can restrict acoustic communication between conspecifics and eventually reduce the fitness of populations. We analysed changes in the call features of 52 males of the poison frog A. bombetes subjected to anthropogenic noise through playback experiments. Thirty-one males did not call during playbacks, but the remaining 21 males did. Fourteen of those 21 males increased their dominant call frequency on average 130.76 Hz when exposed to noise. Males did not increase or diminish the emission rate, number of pulses, and duration of their calls. It is possible that males by increasing the frequency of their calls are showing a behavioural strategy that maintain signal-to-noise ratio, which allows them to communicate acoustically in noisy habitats. Further studies are necessary to corroborate this hypothesis given that the magnitude of the increase in call frequency was small (<100 Hz) for most males.
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Affiliation(s)
- Gina Marcela Jiménez-Vargas
- Grupo de Evolución, Ecología y Conservación EECO, Programa de Biología, Facultad de Ciencias Básicas y Tecnologías, Universidad del Quindío, Armenia, Colombia
| | - Fernando Vargas-Salinas
- Grupo de Evolución, Ecología y Conservación EECO, Programa de Biología, Facultad de Ciencias Básicas y Tecnologías, Universidad del Quindío, Armenia, Colombia
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Jiménez-Vargas GM, Atehortua-Vallejo MA, Arcila-Pérez LF, Carvajal-Castro JD, Vargas-Salinas F. Does abiotic noise promote segregation of functional diversity in Neotropical anuran assemblages? Biol J Linn Soc Lond 2021. [DOI: 10.1093/biolinnean/blaa232] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
The abiotic noise of streams can mask the acoustic signals of anurans with a large body size calling at low frequencies, but not the signals emitted by anurans with a small body size calling at high frequencies. As a consequence, the body size of species in assemblages alongside streams is, on average, lower and less variable than that of assemblages away from streams. Given that the body size in anurans is frequently related to life-history traits, it is expected that functional diversity (FD) will be lower in anuran assemblages alongside streams than in assemblages away from streams. We calculated and compared FD, based on six functional traits, for anuran species in seven localities in different biogeographical regions in the Neotropics. In five lowland localities, FD was lower in assemblages alongside streams than in assemblages away from streams. However, the reverse trend was found in two Andean localities. Noise from streams, acting as an environmental filter, could promote low FD because taxa whose phenotype differs from an optimal type (high call frequency, small body size and associated traits) are excluded from riparian places. However, such habitat filtering could be stronger and affect more anurans in lowland assemblages than in those at medium elevation.
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Affiliation(s)
- Gina Marcela Jiménez-Vargas
- Evolución, Ecología y Conservación (EECO), Facultad de Ciencias Básicas y Nuevas Tecnologías, Programa de Biología, Universidad del Quindío, Carrera 15 Calle 12N Armenia, Quindío, Colombia
| | - Michelle Andrea Atehortua-Vallejo
- Evolución, Ecología y Conservación (EECO), Facultad de Ciencias Básicas y Nuevas Tecnologías, Programa de Biología, Universidad del Quindío, Carrera 15 Calle 12N Armenia, Quindío, Colombia
| | - Luisa F Arcila-Pérez
- Evolución, Ecología y Conservación (EECO), Facultad de Ciencias Básicas y Nuevas Tecnologías, Programa de Biología, Universidad del Quindío, Carrera 15 Calle 12N Armenia, Quindío, Colombia
| | - Juan D Carvajal-Castro
- Evolución, Ecología y Conservación (EECO), Facultad de Ciencias Básicas y Nuevas Tecnologías, Programa de Biología, Universidad del Quindío, Carrera 15 Calle 12N Armenia, Quindío, Colombia
| | - Fernando Vargas-Salinas
- Evolución, Ecología y Conservación (EECO), Facultad de Ciencias Básicas y Nuevas Tecnologías, Programa de Biología, Universidad del Quindío, Carrera 15 Calle 12N Armenia, Quindío, Colombia
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22
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Riondato I, Gamba M, Tan CL, Niu K, Narins PM, Yang Y, Giacoma C. Allometric escape and acoustic signal features facilitate high-frequency communication in an endemic Chinese primate. J Comp Physiol A Neuroethol Sens Neural Behav Physiol 2021; 207:327-336. [PMID: 33555413 DOI: 10.1007/s00359-021-01465-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 01/22/2021] [Accepted: 01/25/2021] [Indexed: 11/24/2022]
Abstract
The principle of acoustic allometry-the larger the animal, the lower its calls' fundamental frequency-is generally observed across terrestrial mammals. Moreover, according to the Acoustic Adaptation Hypothesis, open habitats favor the propagation of high-frequency calls compared to habitats with complex vegetational structures. We carried out playback experiments in which the calls of the Guizhou snub-nosed monkey (Rhinopithecus brelichi) were used as stimuli in sound attenuation and degradation experiments to test the hypothesis that propagation of Guizhou snub-nosed monkey calls is favored above vs through the forest floor vegetation. We found that low-pitched Guizhou snub-nosed monkey vocalizations suffered less attenuation than its high-pitched calls. Guizhou snub-nosed monkeys were observed emitting high-pitched calls from 1.5 to 5.0 m above the ground. The use of high-pitched calls from these heights coupled with the concomitant behavior of moving about above the understory may provide a signal for receivers which maximizes potential transmission and efficacy. Our results support the Acoustic Adaptation Hypothesis and suggest that by uncoupling its vocal output from its size, this monkey can produce a high-pitched call with a broad spectral bandwidth, thereby increasing both its saliency and the frequency range over which the animal may more effectively communicate in its natural habitat.
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Affiliation(s)
- Isidoro Riondato
- Department of Life Sciences and Systems Biology, University of Torino, 10123, Torino, Italy
| | - Marco Gamba
- Department of Life Sciences and Systems Biology, University of Torino, 10123, Torino, Italy.
| | - Chia L Tan
- LVDI International, San Marcos, CA, 92078, USA.,Nonhuman Primate Conservation Research Institute, Tongren University, Tongren, Guizhou, 554300, People's Republic of China
| | - Kefeng Niu
- Department of Life Sciences and Systems Biology, University of Torino, 10123, Torino, Italy.,Forest Ally, Wellness, Science and Technology Co., Ltd., Shenzhen, 518112, Guangdong, China.,Nonhuman Primate Conservation Research Institute, Tongren University, Tongren, Guizhou, 554300, People's Republic of China
| | - Peter M Narins
- Departments of Integrative Biology and Physiology, and Ecology and Evolutionary Biology, University of California Los Angeles, Los Angeles, CA, 90095, USA
| | - Yeqin Yang
- Nonhuman Primate Conservation Research Institute, Tongren University, Tongren, Guizhou, 554300, People's Republic of China
| | - Cristina Giacoma
- Department of Life Sciences and Systems Biology, University of Torino, 10123, Torino, Italy
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23
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Floating frogs sound larger: environmental constraints on signal production drives call frequency changes. THE SCIENCE OF NATURE - NATURWISSENSCHAFTEN 2020; 107:41. [PMID: 32970183 DOI: 10.1007/s00114-020-01697-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 08/26/2020] [Accepted: 09/04/2020] [Indexed: 10/23/2022]
Abstract
In animal communication, receivers benefit from signals providing reliable information on signalers' traits of interest. Individuals involved in conflicts, such as competition between rivals, should pay particular attention to cues that are "unfakeable" by the senders due to the intrinsic properties of the production process. In bioacoustics, the best-known example of such "index signals" is the relationship between a sender's body size and the dominant frequency of their vocalizations. Dominant frequency may, however, not only depend on an animal's morphology but also on the interaction between the sound production system and its immediate environment. Here, we experimentally altered the environment surrounding calling frogs and assessed its impact on the signal produced. Our results show that frogs that are floating are able to inflate their vocal sacs fully and that this change in inflation level is correlated with a decrease of call dominant frequency.
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