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Intra-individual variation in the songs of humpback whales suggests they are sonically searching for conspecifics. Learn Behav 2022; 50:456-481. [PMID: 34791610 DOI: 10.3758/s13420-021-00495-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/18/2021] [Indexed: 01/01/2023]
Abstract
Observations of animals' vocal actions can provide important clues about how they communicate and about how they perceive and react to changing situations. Here, analyses of consecutive songs produced by singing humpback whales recorded off the coast of Hawaii revealed that singers constantly vary the acoustic qualities of their songs within prolonged song sessions. Unlike the progressive changes in song structure that singing humpback whales make across months and years, intra-individual acoustic variations within song sessions appear to be largely stochastic. Additionally, four sequentially produced song components (or "themes") were each found to vary in unique ways. The most extensively used theme was highly variable in overall duration within and across song sessions, but varied relatively little in frequency content. In contrast, the remaining themes varied greatly in frequency content, but showed less variation in duration. Analyses of variations in the amount of time singers spent producing the four themes suggest that the mechanisms that determine when singers transition between themes may be comparable to those that control when terrestrial animals move their eyes to fixate on different positions as they examine visual scenes. The dynamic changes that individual whales make to songs within song sessions are counterproductive if songs serve mainly to provide conspecifics with indications of a singer's fitness. Instead, within-session changes to the acoustic features of songs may serve to enhance a singer's capacity to echoically detect, localize, and track conspecifics from long distances.
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Bergmann A, Gloza-Rausch F, Wimmer B, Kugelschafter K, Knörnschild M. Similarities in social calls during autumn swarming may facilitate interspecific communication between Myotis bat species. Front Ecol Evol 2022. [DOI: 10.3389/fevo.2022.950951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Bats employ a variety of social calls for communication purposes. However, for most species, social calls are far less studied than echolocation calls and their specific function often remains unclear. We investigated the function of in-flight social calls during autumn swarming in front of a large hibernaculum in Northern Germany, whose main inhabitants are two species of Myotis bats, Natterer’s bats (Myotis nattereri) and Daubenton’s bats (Myotis daubentonii). We recorded social calls in nights of high swarming activity and grouped the calls based on their spectro-temporal structure into ten types and verified our visual classification by a discriminant function analysis. Whenever possible, we subsequently assigned social calls to either M. daubentonii or M. nattereri by analyzing the echolocation calls surrounding them. As many bats echolocate at the same time during swarming, we did not analyze single echolocation calls but the “soundscape” surrounding each social call instead, encompassing not only spectral parameters but also the timbre (vocal “color”) of echolocation calls. Both species employ comparatively similar social call types in a swarming context, even though there are subtle differences in call parameters between species. To additionally gain information about the general function of social calls produced in a swarming context, we performed playback experiments with free-flying bats in the vicinity of the roost, using three different call types from both species, respectively. In three out of six treatments, bat activity (approximated as echolocation call rate) increased during and after stimulus presentation, indicating that bats inspected or approached the playback site. Using a camera trap, we were sometimes able to identify the species of approaching bats. Based on the photos taken during playbacks, we assume one call type to support interspecific communication while another call type works for intraspecific group cohesion.
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Tan X, Li Y, Sun K, Jin L, Feng J. Mutual mother-pup acoustic identification in Asian particolored bats. Ecol Evol 2022; 12:e9554. [PMID: 36440317 PMCID: PMC9682203 DOI: 10.1002/ece3.9554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 09/30/2022] [Accepted: 11/07/2022] [Indexed: 11/24/2022] Open
Abstract
In many vertebrates, vocal communication is crucial in parent-offspring interactions, and parents are often able to discriminate between the calls of their own and others' offspring. There are many reports on the unidirectional recognition of isolation calls of pups by maternal bats, but few studies on the ability of bat pups to recognize maternal acoustic signals. In this study, we investigated whether the echolocation pulses of female Asian particolored bats (Vespertilio sinensis) and isolation calls of pups differ statistically among individuals. We used two-choice playback experiments to test whether the mothers and pups of V. sinensis can recognize each other by acoustic signals. Both the echolocation pulses of mother bats and the isolation calls of pups contained sufficient individual characteristics. Playback experiments showed that mothers were able to recognize isolation calls of pups, and most pups greater than 12 days old were able to distinguish echolocation pulses of their own mother from those of other mothers. This is the first use of two-choice acoustic signal playback experiments to confirm that pups can recognize their mothers by echolocation calls. The results provide behavioral evidence for bidirectional recognition of acoustic signals between mothers and infants in frequency-modulated type bats.
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Affiliation(s)
- Xiao Tan
- Jilin Provincial Key Laboratory of Animal Resource Conservation and UtilizationNortheast Normal UniversityChangchunChina
| | - Yu Li
- Jilin Provincial Key Laboratory of Animal Resource Conservation and UtilizationNortheast Normal UniversityChangchunChina
| | - Keping Sun
- Jilin Provincial Key Laboratory of Animal Resource Conservation and UtilizationNortheast Normal UniversityChangchunChina
| | - Longru Jin
- Jilin Provincial Key Laboratory of Animal Resource Conservation and UtilizationNortheast Normal UniversityChangchunChina
- Jilin Provincial Engineering Laboratory of Avian Ecology and Conservation GeneticsNortheast Normal UniversityChangchunChina
| | - Jiang Feng
- Jilin Provincial Key Laboratory of Animal Resource Conservation and UtilizationNortheast Normal UniversityChangchunChina
- College of Life ScienceJilin Agricultural UniversityChangchunChina
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Hanrahan N, Dalziell AH, Turbill C, Armstrong KN, Welbergen JA. Ethogram of Ghost Bat (Macroderma gigas) Behaviours and Associated Social Vocalisations. ACTA CHIROPTEROLOGICA 2022. [DOI: 10.3161/15081109acc2022.24.1.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Nicola Hanrahan
- Hawkesbury Institute for the Environment, Western Sydney University, Science Rd, Richmond NSW 2753, Australia
| | - Anastasia H. Dalziell
- Faculty of Science, Medicine and Health, University of Wollongong, Northfields Ave Wollongong, NSW 2522, Australia
| | - Christopher Turbill
- Hawkesbury Institute for the Environment, Western Sydney University, Science Rd, Richmond NSW 2753, Australia
| | - Kyle N. Armstrong
- School of Biological Sciences, University of Adelaide, North Terrace, Adelaide SA 5005, Australia
| | - Justin A. Welbergen
- Hawkesbury Institute for the Environment, Western Sydney University, Science Rd, Richmond NSW 2753, Australia
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Starik N, Göttert T. Bats adjust echolocation and social call design as a response to urban environments. Front Ecol Evol 2022. [DOI: 10.3389/fevo.2022.939408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Behavioral traits play a major role in the successful adaptation of wildlife to urban conditions. We investigated and compared the acoustic behavior of free ranging bats in rural (Havelland, Brandenburg) and urban (Berlin city center) green areas (n = 6 sites) to assess possible effects of urbanization on bat vocalizations using automated real-time recordings from May to October 2020 and 2021. We show that foraging and social call activity of commonly occurring bat species was lower in urban areas compared to rural areas. We present data on rural-urban variation in acoustic parameters of echolocation and Type D social calls (produced during flight) using the example of the common pipistrelle Pipistrellus pipistrellus. Calls from urban sites revealed significantly higher end and peak frequencies compared to rural site calls. In addition, urban social calls present a higher degree of complexity as they structurally differed from rural social calls with regard to assemblage and number of call components. Moreover, urban social calls were emitted in a presumably different context than rural calls: antagonistic social calls in urban areas were detected throughout the year and in the acoustic absence of conspecifics and heterospecifics. Our results provide evidence for the ability of P. pipistrellus to modulate temporal and spectral features of echolocation and social calls, as well as patterns of social call production, in order to compensate for constraints imposed by the urban acoustic environment. We suggest that this acoustic behavioral plasticity plays a major role in the degree of adaptation of insectivorous bats to urban habitats.
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Corcoran AJ. Sing or Jam? Density-Dependent Food Competition Strategies in Mexican Free-Tailed Bats (Tadarida brasiliensis). Front Ecol Evol 2022. [DOI: 10.3389/fevo.2022.877579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Organisms compete for food in many ways, but it is often difficult to know why they use certain competition strategies over others. Bats compete for food either through aggression coupled with food-claiming signals or by actively interfering with a competitor’s sensory processing during prey pursuit (i.e., jamming). It is not known why these different behaviors are exhibited. I studied food competition between Mexican free-tailed bats (Tadarida brasiliensis) at foraging sites in Arizona and New Mexico using passive acoustic recording, insect sampling and 3-D infrared videography with or without supplemental lighting that concentrated prey. Bat activity was quantified by the number of recorded echolocation calls, while feeding behavior was indicated by feeding buzzes. Two competitive behaviors were observed—song, which was produced by bats chasing conspecifics, and sinFM calls, which jam echolocation of competitors pursuing prey. Song production was most common when few bats were present and feeding at low rates. In contrast, jamming signals were most common with many bats present and feeding at high rates. Supplemental lighting increased the numbers of bats, feeding buzzes and sinFM calls, but not song. These results indicate that bats employ different strategies—singing and chasing competitors at low bat densities but jamming competitors at high bat densities. Food claiming signals (song) may only be effective with few competitors present, whereas jamming can be effective with many bats at a foraging site. Multiple competition strategies appear to have evolved in bats that are used under different densities of competitors.
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Guo D, Ding J, Liu H, Zhou L, Feng J, Luo B, Liu Y. Social calls influence the foraging behavior in wild big-footed myotis. Front Zool 2021; 18:3. [PMID: 33413435 PMCID: PMC7791762 DOI: 10.1186/s12983-020-00384-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Accepted: 12/21/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Why a variety of social animals emit foraging-associated calls during group foraging remains an open question. These vocalizations may be used to recruit conspecifics to food patches (i.e. food advertisement hypothesis) or defend food resources against competitors (food defence hypothesis), presumably depending on food availability. Insectivorous bats rely heavily on vocalizations for navigation, foraging, and social interactions. In this study, we used free-ranging big-footed myotis (Myotis macrodactylus Temminck, 1840) to test whether social calls produced in a foraging context serve to advertise food patches or to ward off food competitors. Using a combination of acoustic recordings, playback experiments with adult females and dietary monitoring (light trapping and DNA metabarcoding techniques), we investigated the relationship between insect availability and social vocalizations in foraging bats. RESULTS The big-footed myotis uttered low-frequency social calls composed of 7 syllable types during foraging interactions. Although the dietary composition of bats varied across different sampling periods, Diptera, Lepidoptera, and Trichoptera were the most common prey consumed. The number of social vocalizations was primarily predicted by insect abundance, insect species composition, and echolocation vocalizations from conspecifics. The number of conspecific echolocation pulses tended to decrease following the emission of most social calls. Feeding bats consistently decreased foraging attempts and food consumption during playbacks of social calls with distinctive structures compared to control trials. The duration of flight decreased 1.29-1.96 fold in the presence of social calls versus controls. CONCLUSIONS These results support the food defence hypothesis, suggesting that foraging bats employ social calls to engage in intraspecific food competition. This study provides correlative evidence for the role of insect abundance and diversity in influencing the emission of social calls in insectivorous bats. Our findings add to the current knowledge of the function of social calls in echolocating bats.
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Affiliation(s)
- Dongge Guo
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, 2555 Jingyue Street, Changchun, 130117, China
| | - Jianan Ding
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, 2555 Jingyue Street, Changchun, 130117, China
| | - Heng Liu
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, 2555 Jingyue Street, Changchun, 130117, China
| | - Lin Zhou
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, 2555 Jingyue Street, Changchun, 130117, China
| | - Jiang Feng
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, 2555 Jingyue Street, Changchun, 130117, China.,College of Life Science, Jilin Agricultural University, 2888 Xincheng Street, Changchun, 130118, China
| | - Bo Luo
- Key Laboratory of Southwest China Wildlife Resources Conservation of Ministry of Education, China West Normal University, Nanchong, 637002, China.
| | - Ying Liu
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, 2555 Jingyue Street, Changchun, 130117, China.
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Götze S, Denzinger A, Schnitzler HU. High frequency social calls indicate food source defense in foraging Common pipistrelle bats. Sci Rep 2020; 10:5764. [PMID: 32238828 PMCID: PMC7113247 DOI: 10.1038/s41598-020-62743-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Accepted: 03/13/2020] [Indexed: 11/23/2022] Open
Abstract
Social calls have the function to coordinate the behavior of animals. In the presence of conspecifics foraging Common pipistrelle bats (P. pipistrellus) emitted, in addition to typical echolocation signals, two types of social calls: complex social calls and an as-of-yet undescribed, short, frequency-modulated call type with high terminal frequency, which we term “high frequency social call”. By recording the flight and acoustic behavior of free flying pairs of foraging P. pipistrellus with an array of four microphones we were able to determine their three-dimensional flight paths and attribute emitted calls to particular behavioral situations. Complex social calls were emitted at further inter-individual distances and at large bearing angles to conspecifics, whereas high frequency social calls were produced at significantly shorter distances and at smaller bearing angles. These calls were associated with chasings and the eviction of the intruder. We assume that the emission of both types of social calls by foraging bats reflects a two-stage-process of the occupation and defense of a food patch. Common pipistrelle bats use complex social calls to claim a food patch and switch to agonistic behaviors, including chasings and high frequency social call emissions, when they defend their foraging territory against an intruder.
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Affiliation(s)
- Simone Götze
- Animal Physiology, Institute for Neurobiology, University of Tübingen, Tübingen, Germany.
| | - Annette Denzinger
- Animal Physiology, Institute for Neurobiology, University of Tübingen, Tübingen, Germany
| | - Hans-Ulrich Schnitzler
- Animal Physiology, Institute for Neurobiology, University of Tübingen, Tübingen, Germany
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Hintze F, Arias-Aguilar A, Dias-Silva L, Delgado-Jaramillo M, Silva CR, Jucá T, Mischiatti FL, Almeida M, Bezerra B, Aguiar LMS, Ramos Pereira MJ, Bernard E. Molossid unlimited: extraordinary extension of range and unusual vocalization patterns of the bat, Promops centralis. J Mammal 2019. [DOI: 10.1093/jmammal/gyz167] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
The big crested mastiff bat, Promops centralis, occurs in Central and South America, but knowledge of its ecology is limited due to its open space hunting strategy, making captures extremely challenging. Notwithstanding, members of the species produce echolocation calls that are easy to identify. After recording calls of P. centralis 1,500 km away from its known range in Brazil, we hypothesized that the distribution range of this species was probably greatly underestimated. To improve the accuracy of P. centralis’ real distribution, we employed acoustic surveys throughout parts of Brazil, conducted after a bibliographic review to gather additional records, and used MaxEnt to model the species’ potential distribution. We have found that P. centralis has a much wider distribution in South America than previously thought, adding more than 3.8 million km2 to its former known area. We also describe an unusual vocalization pattern of P. centralis, with individuals emitting at least three very distinct but highly variable calls. This study shows that bioacoustic surveys and species distribution models can complement traditional methodologies in studying species that are difficult to capture, such as P. centralis, potentially contributing to more effective conservation and management plans.
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Affiliation(s)
- Frederico Hintze
- Laboratório de Ciência Aplicada à Conservação da Biodiversidade, Departamento de Zoologia, Universidade Federal de Pernambuco, Rua Professor Nelson Chaves s/n, Cidade Universitária, Recife, PE 50670-420, Brasil
- Programa de Pós-Graduação em Biologia Animal, Departamento de Zoologia, Universidade Federal de Pernambuco, Avenida Professor Moraes Rego s/n, Cidade Universitária, Recife, PE 50670-901, Brasil
| | - Adriana Arias-Aguilar
- Laboratório de Evolução, Sistemática e Ecologia de Aves e Mamíferos, Programa de Pós-Graduação em Biologia Animal, Departamento de Zoologia, Prédio 43435, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, Porto Alegre, RS 91540-000, Brasil
| | - Leonardo Dias-Silva
- Laboratório de Ecologia & Conservação, Departamento de Biologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Avenida Presidente Antônio Carlos 6.627, Campus UFMG, Pampulha, Belo Horizonte, MG 31270-901, Brasil
| | - Mariana Delgado-Jaramillo
- Laboratório de Ciência Aplicada à Conservação da Biodiversidade, Departamento de Zoologia, Universidade Federal de Pernambuco, Rua Professor Nelson Chaves s/n, Cidade Universitária, Recife, PE 50670-420, Brasil
- Programa de Pós-Graduação em Biologia Animal, Departamento de Zoologia, Universidade Federal de Pernambuco, Avenida Professor Moraes Rego s/n, Cidade Universitária, Recife, PE 50670-901, Brasil
| | - Carina Rodrigues Silva
- Laboratório de Ciência Aplicada à Conservação da Biodiversidade, Departamento de Zoologia, Universidade Federal de Pernambuco, Rua Professor Nelson Chaves s/n, Cidade Universitária, Recife, PE 50670-420, Brasil
- Programa de Pós-Graduação em Biologia Animal, Departamento de Zoologia, Universidade Federal de Pernambuco, Avenida Professor Moraes Rego s/n, Cidade Universitária, Recife, PE 50670-901, Brasil
| | - Thays Jucá
- Laboratório de Etologia, Departamento de Zoologia, Universidade Federal de Pernambuco, Avenida Professor Moraes Rego s/n, Cidade Universitária, Recife, PE 50670-901, Brasil
- Instituto de Ciências Biológicas, Universidade de Pernambuco, Rua Arnóbio Marques, 310, Santo Amaro, Recife, PE 50100-130, Brasil
| | - Francyne Lyrio Mischiatti
- Laboratório de Estudos em Quirópteros, Departamento de Ciências Biológicas, Edifício Lydia Behar, Centro de Ciências Humanas e Naturais, Universidade Federal do Espírito Santo, Avenida Fernando Ferrari, 514, Goiabeiras, Vitória, ES 29075-910, Brasil
| | - Márcio Almeida
- Laboratório de Estudos em Quirópteros, Departamento de Ciências Biológicas, Edifício Lydia Behar, Centro de Ciências Humanas e Naturais, Universidade Federal do Espírito Santo, Avenida Fernando Ferrari, 514, Goiabeiras, Vitória, ES 29075-910, Brasil
| | - Bruna Bezerra
- Laboratório de Etologia, Departamento de Zoologia, Universidade Federal de Pernambuco, Avenida Professor Moraes Rego s/n, Cidade Universitária, Recife, PE 50670-901, Brasil
| | - Ludmilla M S Aguiar
- Laboratório de Biologia e Conservação de Morcegos, Departamento de Zoologia, Instituto de Ciências Biológicas, Campus Darcy Ribeiro, Universidade de Brasília, Brasília, DF 70910-900, Brasil
| | - Maria João Ramos Pereira
- Laboratório de Evolução, Sistemática e Ecologia de Aves e Mamíferos, Programa de Pós-Graduação em Biologia Animal, Departamento de Zoologia, Prédio 43435, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, Porto Alegre, RS 91540-000, Brasil
- Centro de Estudos do Ambiente e do Mar, Universidade de Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Enrico Bernard
- Laboratório de Ciência Aplicada à Conservação da Biodiversidade, Departamento de Zoologia, Universidade Federal de Pernambuco, Rua Professor Nelson Chaves s/n, Cidade Universitária, Recife, PE 50670-420, Brasil
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10
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Springall BT, Li H, Kalcounis-Rueppell MC. The In-Flight Social Calls of Insectivorous Bats: Species Specific Behaviors and Contexts of Social Call Production. Front Ecol Evol 2019. [DOI: 10.3389/fevo.2019.00441] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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11
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Schmidbauer P, Denzinger A. Social calls of Myotis nattereri during swarming: Call structure mirrors the different behavioral context. PLoS One 2019; 14:e0221792. [PMID: 31490957 PMCID: PMC6730923 DOI: 10.1371/journal.pone.0221792] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Accepted: 08/14/2019] [Indexed: 11/26/2022] Open
Abstract
Swarming is a characteristic behavior of bats that occurs in different social contexts. We studied the swarming behavior of Myotis nattereri at a maternity colony and at an autumn swarming site in South-West Germany by using synchronized sound and video recordings. Swarming was always associated with social vocalizations consisting of four frequently occurring call types. Call type A was a short call with a broadband steep-shallow-steep downward frequency modulation. Call type B consisted of two elements beginning with a broadband upward hooked element followed by a steep frequency modulated element. Call type C showed a characteristic rapid downward-upward-downward frequency modulation. Call type D was a long sinusoidal trill-like call with high variability in signal structure. All call types were recorded at the maternity colony, as well as at the autumn swarming site, but the incidence of each call type differed distinctly between the study sites. At the maternity roost, type A calls were most commonly produced. We found evidence for an individual signature in this call type and suggest that this social call has the function of a contact call in Natterer’s bats. At the autumn swarming site, type D calls were the most common social calls; in contrast, this call type was recorded only twice at the maternity roost. The occurrence of trills mainly at the autumn swarming site and their high variability suggests that trills function as male advertisement calls in M. nattereri.
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Affiliation(s)
- Philipp Schmidbauer
- Animal Physiology, Institute for Neurobiology, University of Tübingen, Tübingen, Germany
- * E-mail:
| | - Annette Denzinger
- Animal Physiology, Institute for Neurobiology, University of Tübingen, Tübingen, Germany
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12
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Fu Z, Zhang G, Shi Q, Zhou D, Tang J, Liu L, Chen Q. Behaviorally relevant frequency selectivity in single- and double-on neurons in the inferior colliculus of the Pratt's roundleaf bat, Hipposideros pratti. PLoS One 2019; 14:e0209446. [PMID: 30601861 PMCID: PMC6314609 DOI: 10.1371/journal.pone.0209446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Accepted: 12/05/2018] [Indexed: 11/20/2022] Open
Abstract
Frequency analysis is a fundamental function of the auditory system, and it is essential to study the auditory response properties using behavior-related sounds. Our previous study has shown that the inferior collicular (IC) neurons of CF-FM (constant frequency-frequency modulation) bats could be classified into single-on (SO) and double-on (DO) neurons under CF-FM stimulation. Here, we employed Pratt's roundleaf bats, Hipposideros pratti, to investigate the frequency selectivity of SO and DO neurons in response to CF and behavior-related CF-FM sounds using in vivo extracellular recordings. The results demonstrated that the bandwidths (BWs) of iso-frequency tuning curves had no significant differences between the SO and the DO neurons when stimulated by CF sounds. However, the SO neurons had significant narrower BWs than DO neurons when stimulated with CF-FM sounds. In vivo intracellular recordings showed that both SO and DO neurons had significantly shorter post-spike hyperpolarization latency and excitatory duration in response to CF-FM in comparison to CF stimuli, suggesting that the FM component had an inhibitory effect on the responses to the CF component. These results suggested that SO neurons had higher frequency selectivity than DO neurons under behavior-related CF-FM stimulation, making them suitable for detecting frequency changes during echolocation.
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Affiliation(s)
- Ziying Fu
- School of Life Sciences and Hubei Key Lab of Genetic Regulation & Integrative Biology, Central China Normal University, Wuhan, China
| | - Guimin Zhang
- School of Life Sciences and Hubei Key Lab of Genetic Regulation & Integrative Biology, Central China Normal University, Wuhan, China
| | - Qing Shi
- School of Life Sciences and Hubei Key Lab of Genetic Regulation & Integrative Biology, Central China Normal University, Wuhan, China
| | - Dandan Zhou
- School of Life Sciences and Hubei Key Lab of Genetic Regulation & Integrative Biology, Central China Normal University, Wuhan, China
| | - Jia Tang
- School of Life Sciences and Hubei Key Lab of Genetic Regulation & Integrative Biology, Central China Normal University, Wuhan, China
| | - Long Liu
- College of science, National University of Defense Technology, Changsha, China
| | - Qicai Chen
- School of Life Sciences and Hubei Key Lab of Genetic Regulation & Integrative Biology, Central China Normal University, Wuhan, China
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13
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Brigham RM. Learning to listen: a primer on bat echolocation research. CAN J ZOOL 2018. [DOI: 10.1139/cjz-2018-0060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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