1
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Cox C, Templeton E, Fusaroli R. Fine-tuning social timing: From non-human to human animals and back: A commentary on "The evolution of social timing" by Verga, Kotz and Ravignani (2023). Phys Life Rev 2023; 47:79-81. [PMID: 37742435 DOI: 10.1016/j.plrev.2023.09.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Accepted: 09/07/2023] [Indexed: 09/26/2023]
Affiliation(s)
- Christopher Cox
- Department of Linguistics & Cognitive Science, Aarhus University, Jens Chr. Skous Vej 2, Building 1485, 8200 Aarhus, Denmark; Interacting Minds Centre, Aarhus University, Jens Chr. Skous Vej 4, Building 1483, 8200 Aarhus, Denmark; Department of Language and Linguistic Science, University of York, Vanbrugh College, Heslington, York YO10 5 DD, United Kingdom
| | - Emma Templeton
- Department of Psychological and Brain Sciences Dartmouth College, Hanover, NH, USA
| | - Riccardo Fusaroli
- Department of Linguistics & Cognitive Science, Aarhus University, Jens Chr. Skous Vej 2, Building 1485, 8200 Aarhus, Denmark; Interacting Minds Centre, Aarhus University, Jens Chr. Skous Vej 4, Building 1483, 8200 Aarhus, Denmark; Linguistic Data Consortium, University of Pennsylvania, PA, USA.
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2
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Keller PE, Lee J, König R, Novembre G. Sex-related communicative functions of voice spectral energy in human chorusing. Biol Lett 2023; 19:20230326. [PMID: 37935372 PMCID: PMC10645082 DOI: 10.1098/rsbl.2023.0326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Accepted: 10/16/2023] [Indexed: 11/09/2023] Open
Abstract
Music is a human communicative art whose evolutionary origins may lie in capacities that support cooperation and/or competition. A mixed account favouring simultaneous cooperation and competition draws on analogous interactive displays produced by collectively signalling non-human animals (e.g. crickets and frogs). In these displays, rhythmically coordinated calls serve as a beacon whereby groups of males 'cooperatively' attract potential female mates, while the likelihood of each male competitively attracting an actual mate depends on the precedence of his signal. Human behaviour consistent with the mixed account was previously observed in a renowned boys choir, where the basses-the oldest boys with the deepest voices-boosted their acoustic prominence by increasing energy in a high-frequency band of the vocal spectrum when girls were in an otherwise male audience. The current study tested female and male sensitivity and preferences for this subtle vocal modulation in online listening tasks. Results indicate that while female and male listeners are similarly sensitive to enhanced high-spectral energy elicited by the presence of girls in the audience, only female listeners exhibit a reliable preference for it. Findings suggest that human chorusing is a flexible form of social communicative behaviour that allows simultaneous group cohesion and sexually motivated competition.
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Affiliation(s)
- Peter E. Keller
- Center for Music in the Brain, Department of Clinical Medicine, Aarhus University, Aarhus 8000, Denmark
- The MARCS Institute for Brain, Behaviour and Development, Western Sydney University, Penrith South, Australia
| | - Jennifer Lee
- Queensland Aphasia Research Centre, University of Queensland, Brisbane, Queensland, Australia
| | | | - Giacomo Novembre
- Neuroscience of Perception and Action Lab, Italian Institute of Technology, Rome, Italy
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3
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Greenfield MD, Merker B. Coordinated rhythms in animal species, including humans: Entrainment from bushcricket chorusing to the philharmonic orchestra. Neurosci Biobehav Rev 2023; 153:105382. [PMID: 37673282 DOI: 10.1016/j.neubiorev.2023.105382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 08/28/2023] [Accepted: 09/01/2023] [Indexed: 09/08/2023]
Abstract
Coordinated group displays featuring precise entrainment of rhythmic behavior between neighbors occur not only in human music, dance and drill, but in the acoustic or optical signaling of a number of species of arthropods and anurans. In this review we describe the mechanisms of phase resetting and phase and tempo adjustments that allow the periodic output of signaling individuals to be aligned in synchronized rhythmic group displays. These mechanisms are well described in some of the synchronizing arthropod species, in which conspecific signals reset an individual's endogenous output oscillators in such a way that the joint rhythmic signals are locked in phase. Some of these species are capable of mutually adjusting both the phase and tempo of their rhythmic signaling, thereby achieving what is called perfect synchrony, a capacity which otherwise is found only in humans. We discuss this disjoint phylogenetic distribution of inter-individual rhythmic entrainment in the context of the functions such entrainment might perform in the various species concerned, and the adaptive circumstances in which it might evolve.
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Affiliation(s)
- Michael D Greenfield
- ENES Bioacoustics Research Lab, CRNL, University of Saint-Etienne, CNRS, Inserm, Saint-Etienne, France; Department of Ecology and Evolutionary Biology, University of Kansas, Lawrence, KS 66045, USA.
| | - Bjorn Merker
- Independent Scholar, SE-29194 Kristianstad, Sweden
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4
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Kim EB, Frasier KE, McKenna MF, Kok ACM, Peavey Reeves LE, Oestreich WK, Arrieta G, Wiggins S, Baumann-Pickering S. SoundScape learning: An automatic method for separating fish chorus in marine soundscapes. THE JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 2023; 153:1710. [PMID: 37002102 DOI: 10.1121/10.0017432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Accepted: 02/13/2023] [Indexed: 05/18/2023]
Abstract
Marine soundscapes provide the opportunity to non-invasively learn about, monitor, and conserve ecosystems. Some fishes produce sound in chorus, often in association with mating, and there is much to learn about fish choruses and the species producing them. Manually analyzing years of acoustic data is increasingly unfeasible, and is especially challenging with fish chorus, as multiple fish choruses can co-occur in time and frequency and can overlap with vessel noise and other transient sounds. This study proposes an unsupervised automated method, called SoundScape Learning (SSL), to separate fish chorus from soundscape using an integrated technique that makes use of randomized robust principal component analysis (RRPCA), unsupervised clustering, and a neural network. SSL was applied to 14 recording locations off southern and central California and was able to detect a single fish chorus of interest in 5.3 yrs of acoustically diverse soundscapes. Through application of SSL, the chorus of interest was found to be nocturnal, increased in intensity at sunset and sunrise, and was seasonally present from late Spring to late Fall. Further application of SSL will improve understanding of fish behavior, essential habitat, species distribution, and potential human and climate change impacts, and thus allow for protection of vulnerable fish species.
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Affiliation(s)
- Ella B Kim
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92037, USA
| | - Kaitlin E Frasier
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92037, USA
| | - Megan F McKenna
- National Marine Sanctuary Foundation-Contracted, Silver Spring, Maryland 20910, USA
| | - Annebelle C M Kok
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92037, USA
| | | | - William K Oestreich
- Monterey Bay Aquarium Research Institute, Moss Landing, California 95039, USA
| | - Gabrielle Arrieta
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92037, USA
| | - Sean Wiggins
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92037, USA
| | - Simone Baumann-Pickering
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92037, USA
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5
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Liang SH, Lee LL, Shieh BS. Female preference for song frequency in the cicada Mogannia formosana Matsumura (Hemiptera: Cicadidae). Behav Processes 2022; 197:104626. [PMID: 35337942 DOI: 10.1016/j.beproc.2022.104626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 02/08/2022] [Accepted: 03/17/2022] [Indexed: 11/18/2022]
Abstract
In chorusing species, sound frequency has been suggested as a decisive cue for male body size in female mate choice. However, few studies on the female choice of male song frequency have been conducted in cicadas, in which males of most species sing in chorusing groups to attract females for mating. In this study, we investigated female mate choice for song frequency and body size of males of a chorusing cicada, Mogannia formosana, by phonotaxis experiments using two-choice tests and field observation, respectively. The choice proportion of effective responses and the proximity to the stimulus were used to assess the phonotaxis preference. In the field, two types of males (copulating vs. random) were caught, and their body sizes were compared. In phonotaxis experiments, the results revealed that females showed a preference for low-frequency song by approaching the low-frequency stimuli to a significantly greater proximity. By comparing the body sizes of copulating vs. random males, no significant differences were found. However, the copulating males had significantly different body shapes, as expressed by pronotum width regression by body length, from those of random males. We concluded that the sound frequency of male songs and male body shape in M. formosana can be used as cues of mate quality during female mate choice within a chorus. Additionally, we suggest that females of this species might use multiple cues for mate choice in different ranges of communication and that body size might not be the sole criterion of mate quality.
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Affiliation(s)
- Shih-Hsiung Liang
- Department of Biotechnology, National Kaohsiung Normal University, Kaohsiung, Taiwan
| | - Lin-Lee Lee
- Department of English, National Kaohsiung Normal University, Kaohsiung, Taiwan
| | - Bao-Sen Shieh
- Department of Biomedical Science and Environmental Biology, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan.
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6
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Perez DM, Klunk CL, Araujo SBL. Imperfect synchrony in animal displays: why does it occur and what is the true role of leadership? Philos Trans R Soc Lond B Biol Sci 2021; 376:20200339. [PMID: 34420387 PMCID: PMC8384059 DOI: 10.1098/rstb.2020.0339] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/26/2021] [Indexed: 11/12/2022] Open
Abstract
Synchrony can be defined as the precise coordination between independent individuals, and this behaviour is more enigmatic when it is imperfect. The traditional theoretical explanation for imperfect synchronous courtship is that it arises as a by-product of the competition between males to broadcast leading signals to attract female attention. This competition is considered an evolutionary stable strategy maintained through sexual selection. However, previous studies have revealed that leading signals are not honest indicators of male quality. We studied imperfect courtship synchrony in fiddler crabs to mainly test whether (i) signal leadership and rate are defined by male quality and (ii) signal leadership generates synchrony. Fiddler crab males wave their enlarged claws during courtship, and females prefer leading males-displaying ahead of their neighbour(s). We filmed groups of waving males in the field to detect how often individuals were leaders and if they engaged in synchrony. Overall, we found that courtship effort is not directly related to male size, a general proxy for quality. Contrary to the long-standing assumption, we also revealed that leadership is not directly related to group synchrony, but faster wave rate correlates with both leadership and synchrony. This article is part of the theme issue 'Synchrony and rhythm interaction: from the brain to behavioural ecology'.
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Affiliation(s)
- Daniela M. Perez
- Graduate Program in Ecology and Conservation, Universidade Federal do Paraná, Curitiba, Parana 81531-990, Brazil
| | - Cristian L. Klunk
- Graduate Program in Ecology and Conservation, Universidade Federal do Paraná, Curitiba, Parana 81531-990, Brazil
| | - Sabrina B. L. Araujo
- Department of Physics, Laboratory of Biological Interactions, Universidade Federal do Paraná, Curitiba, Parana 81531-990, Brazil
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7
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Dotov D, Trainor LJ. Cross-frequency coupling explains the preference for simple ratios in rhythmic behaviour and the relative stability across non-synchronous patterns. Philos Trans R Soc Lond B Biol Sci 2021; 376:20200333. [PMID: 34420377 DOI: 10.1098/rstb.2020.0333] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Rhythms are important for understanding coordinated behaviours in ecological systems. The repetitive nature of rhythms affords prediction, planning of movements and coordination of processes within and between individuals. A major challenge is to understand complex forms of coordination when they differ from complete synchronization. By expressing phase as ratio of a cycle, we adapted levels of the Farey tree as a metric of complexity mapped to the range between in-phase and anti-phase synchronization. In a bimanual tapping task, this revealed an increase of variability with ratio complexity, a range of hidden and unstable yet measurable modes, and a rank-frequency scaling law across these modes. We use the phase-attractive circle map to propose an interpretation of these findings in terms of hierarchical cross-frequency coupling (CFC). We also consider the tendency for small-integer attractors in the single-hand repeated tapping of three-interval rhythms reported in the literature. The phase-attractive circle map has wider basins of attractions for such ratios. This work motivates the question whether CFC intrinsic to neural dynamics implements low-level priors for timing and coordination and thus becomes involved in phenomena as diverse as attractor states in bimanual coordination and the cross-cultural tendency for musical rhythms to have simple interval ratios. This article is part of the theme issue 'Synchrony and rhythm interaction: from the brain to behavioural ecology'.
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Affiliation(s)
- Dobromir Dotov
- LIVELab, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada L8S4K1.,Psychology, Neuroscience and Behaviour, McMaster University, Ontario, Canada
| | - Laurel J Trainor
- LIVELab, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada L8S4K1.,Psychology, Neuroscience and Behaviour, McMaster University, Ontario, Canada.,Rotman Research Institute, Toronto, Canada
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8
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Greenfield MD, Aihara I, Amichay G, Anichini M, Nityananda V. Rhythm interaction in animal groups: selective attention in communication networks. Philos Trans R Soc Lond B Biol Sci 2021; 376:20200338. [PMID: 34420386 DOI: 10.1098/rstb.2020.0338] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Animals communicating interactively with conspecifics often time their broadcasts to avoid overlapping interference, to emit leading, as opposed to following, signals or to synchronize their signalling rhythms. Each of these adjustments becomes more difficult as the number of interactants increases beyond a pair. Among acoustic species, insects and anurans generally deal with the problem of group signalling by means of 'selective attention' in which they focus on several close or conspicuous neighbours and ignore the rest. In these animals, where signalling and receiving are often dictated by sex, the process of selective attention in signallers may have a parallel counterpart in receivers, which also focus on close neighbours. In birds and mammals, local groups tend to be extended families or clans, and group signalling may entail complex timing mechanisms that allow for attention to all individuals. In general, the mechanisms that allow animals to communicate in groups appear to be fully interwoven with the basic process of rhythmic signalling. This article is part of the theme issue 'Synchrony and rhythm interaction: from the brain to behavioural ecology'.
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Affiliation(s)
- Michael D Greenfield
- Department of Ecology and Evolutionary Biology, University of Kansas, Lawrence, KS 66045, USA.,Equipe Neuro-Ethologie Sensorielle, ENES/Neuro-PSI, CNRS UMR 9197, University of Lyon/Saint-Etienne, 42023 Saint Etienne, France
| | - Ikkyu Aihara
- Faculty of Engineering, Information and Systems, University of Tsukuba, Tsukuba 305-8573, Japan
| | - Guy Amichay
- Department of Collective Behaviour, Max Planck Institute of Animal Behavior, 78467 Konstanz, Germany.,Centre for the Advanced Study of Collective Behaviour, University of Konstanz, 78464 Konstanz, Germany.,Department of Biology, University of Konstanz, 78464 Konstanz, Germany
| | - Marianna Anichini
- Hanse-Wissenschaftskolleg Institute for Advanced Study, 'Brain' Research Area, 27753 Delmenhorst, Germany.,Animal Physiology and Behavior Group, Department of Neuroscience, School of Medicine and Health Sciences, Carl von Ossietzky University of Oldenburg, 26129 Oldenburg, Germany
| | - Vivek Nityananda
- Biosciences Institute, Faculty of Medical Sciences, Newcastle University, Henry Wellcome Building, Framlington Place, Newcastle Upon Tyne NE2 4HH, UK
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9
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Patel AD. Vocal learning as a preadaptation for the evolution of human beat perception and synchronization. Philos Trans R Soc Lond B Biol Sci 2021; 376:20200326. [PMID: 34420384 PMCID: PMC8380969 DOI: 10.1098/rstb.2020.0326] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/18/2021] [Indexed: 12/18/2022] Open
Abstract
The human capacity to synchronize movements to an auditory beat is central to musical behaviour and to debates over the evolution of human musicality. Have humans evolved any neural specializations for music processing, or does music rely entirely on brain circuits that evolved for other reasons? The vocal learning and rhythmic synchronization hypothesis proposes that our ability to move in time with an auditory beat in a precise, predictive and tempo-flexible manner originated in the neural circuitry for complex vocal learning. In the 15 years, since the hypothesis was proposed a variety of studies have supported it. However, one study has provided a significant challenge to the hypothesis. Furthermore, it is increasingly clear that vocal learning is not a binary trait animals have or lack, but varies more continuously across species. In the light of these developments and of recent progress in the neurobiology of beat processing and of vocal learning, the current paper revises the vocal learning hypothesis. It argues that an advanced form of vocal learning acts as a preadaptation for sporadic beat perception and synchronization (BPS), providing intrinsic rewards for predicting the temporal structure of complex acoustic sequences. It further proposes that in humans, mechanisms of gene-culture coevolution transformed this preadaptation into a genuine neural adaptation for sustained BPS. The larger significance of this proposal is that it outlines a hypothesis of cognitive gene-culture coevolution which makes testable predictions for neuroscience, cross-species studies and genetics. This article is part of the theme issue 'Synchrony and rhythm interaction: from the brain to behavioural ecology'.
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Affiliation(s)
- Aniruddh D. Patel
- Department of Psychology, Tufts University, Medford, MA, USA
- Program in Brain, Mind, and Consciousness, Canadian Institute for Advanced Research, Toronto, Canada
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10
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Greenfield MD, Honing H, Kotz SA, Ravignani A. Synchrony and rhythm interaction: from the brain to behavioural ecology. Philos Trans R Soc Lond B Biol Sci 2021; 376:20200324. [PMID: 34420379 DOI: 10.1098/rstb.2020.0324] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
This theme issue assembles current studies that ask how and why precise synchronization and related forms of rhythm interaction are expressed in a wide range of behaviour. The studies cover human activity, with an emphasis on music, and social behaviour, reproduction and communication in non-human animals. In most cases, the temporally aligned rhythms have short-from several seconds down to a fraction of a second-periods and are regulated by central nervous system pacemakers, but interactions involving rhythms that are 24 h or longer and originate in biological clocks also occur. Across this spectrum of activities, species and time scales, empirical work and modelling suggest that synchrony arises from a limited number of coupled-oscillator mechanisms with which individuals mutually entrain. Phylogenetic distribution of these common mechanisms points towards convergent evolution. Studies of animal communication indicate that many synchronous interactions between the signals of neighbouring individuals are specifically favoured by selection. However, synchronous displays are often emergent properties of entrainment between signalling individuals, and in some situations, the very signallers who produce a display might not gain any benefit from the collective timing of their production. This article is part of the theme issue 'Synchrony and rhythm interaction: from the brain to behavioural ecology'.
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Affiliation(s)
- Michael D Greenfield
- Department of Ecology and Evolutionary Biology, University of Kansas, Lawrence, KS 66045, USA.,Equipe Neuro-Ethologie Sensorielle, ENES/Neuro-PSI, CNRS UMR 9197, Universtiy Lyon/Saint-Etienne, 42023 Saint Etienne, France
| | - Henkjan Honing
- Music Cognition Group (MCG), Institute for Logic, Language and Computation (ILLC), University of Amsterdam, Amsterdam 1090 GE, The Netherlands
| | - Sonja A Kotz
- Department of Neuropsychology and Psychopharmacology, Faculty of Psychology and Neuroscience, Maastricht University, Universiteitssingel 40, 6200 MD Maastricht, The Netherlands
| | - Andrea Ravignani
- Comparative Bioacoustics Group, Max Planck Institute for Psycholinguistics, Nijmegen, The Netherlands
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11
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Shimizu D, Okada T. Synchronization and Coordination of Art Performances in Highly Competitive Contexts: Battle Scenes of Expert Breakdancers. Front Psychol 2021; 12:635534. [PMID: 33935885 PMCID: PMC8081904 DOI: 10.3389/fpsyg.2021.635534] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 03/15/2021] [Indexed: 11/13/2022] Open
Abstract
In the performing arts, such as music and dance performances, people actively interact with each other and show their exciting performances. Some studies have proposed that this interaction is a social origin of the performing arts. Some have further investigated this phenomenon based on the synchronization and coordination theory. Though the majority of these studies have focused on the collaborative context, several genres of the performing arts, such as jazz sessions and breakdance battles, have a competitive context. Several studies have suggested that, in this competitive context, performers actively interact with each other and construct some correspondence. Moreover, a few recent studies focusing on competitive conversations, such as debates, have shown that, compared to people's interactions in collaborative conversations, people in competitive contexts frequently coordinate their behaviors in complicated ways. However, the interaction and coordination among performers in these competitive contexts have not been sufficiently investigated. Therefore, we investigated the coordination of expert breakdancers in battle scenes and measured their rhythmic movements using a motion capture system. We calculated the relative phase of the rhythmic movements between two dancers to investigate their coordination. The results showed that the dancers' rhythmic movements tended to synchronize in an anti-phase fashion, which means that there were similarities as well as differences between the two dancers' rhythmic movements. Furthermore, this pattern of coordination changed dynamically as time elapsed, from an in-phase synchronization or leader-follower relationships to an anti-phase synchronization and then leader-follower relationships.
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Affiliation(s)
- Daichi Shimizu
- Graduate School of Education, The University of Tokyo, Tokyo, Japan
| | - Takeshi Okada
- Graduate School of Education, The University of Tokyo, Tokyo, Japan
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12
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Sheppard LW, Mechtley B, Walter JA, Reuman DC. Self-organizing cicada choruses respond to the local sound and light environment. Ecol Evol 2020; 10:4471-4482. [PMID: 32489611 PMCID: PMC7246199 DOI: 10.1002/ece3.6213] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 02/05/2020] [Accepted: 02/24/2020] [Indexed: 12/02/2022] Open
Abstract
Periodical cicadas exhibit an extraordinary capacity for self-organizing spatially synchronous breeding behavior. The regular emergence of periodical cicada broods across the United States is a phenomenon of longstanding public and scientific interest, as the cicadas of each brood emerge in huge numbers and briefly dominate their ecosystem. During the emergence, the 17-year periodical cicada species Magicicada cassini is found to form synchronized choruses, and we investigated their chorusing behavior from the standpoint of spatial synchrony.Cicada choruses were observed to form in trees, calling regularly every five seconds. In order to determine the limits of this self-organizing behavior, we set out to quantify the spatial synchronization between cicada call choruses in different trees, and how and why this varies in space and time.We performed 20 simultaneous recordings in Clinton State Park, Kansas, in June 2015 (Brood IV), with a team of citizen-science volunteers using consumer equipment (smartphones). We use a wavelet approach to show in detail how spatially synchronous, self-organized chorusing varies across the forest.We show how conditions that increase the strength of audio interactions between cicadas also increase the spatial synchrony of their chorusing. Higher forest canopy light levels increase cicada activity, corresponding to faster and higher-amplitude chorus cycling and to greater synchrony of cycles across space. We implemented a relaxation-oscillator-ensemble model of interacting cicadas, finding that a tendency to call more often, driven by light levels, results in all these effects.Results demonstrate how the capacity to self-organize in ecology depends sensitively on environmental conditions. Spatially correlated modulation of cycling rate by an external driver can also promote self-organization of phase synchrony.
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Affiliation(s)
- Lawrence W. Sheppard
- Department of Ecology and Evolutionary Biology and Kansas Biological SurveyUniversity of KansasLawrenceKSUSA
| | - Brandon Mechtley
- School of Arts, Media and EngineeringArizona State UniversityTempeAZUSA
| | - Jonathan A. Walter
- Department of Environmental SciencesUniversity of VirginiaCharlottesvilleVAUSA
| | - Daniel C. Reuman
- Department of Ecology and Evolutionary Biology and Kansas Biological SurveyUniversity of KansasLawrenceKSUSA
- Laboratory of PopulationsRockefeller UniversityNew YorkNYUSA
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13
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Anichini M, Rebrina F, Reinhold K, Lehmann GU. Adaptive plasticity of bushcricket acoustic signalling in socially heterogeneous choruses. Anim Behav 2019. [DOI: 10.1016/j.anbehav.2019.10.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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14
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Perez DM, Crisigiovanni EL, Pie MR, Rorato AC, Lopes SR, Araujo SBL. Ecology and signal structure drive the evolution of synchronous displays. Evolution 2019; 74:434-446. [PMID: 31503329 DOI: 10.1111/evo.13841] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 08/27/2019] [Accepted: 08/30/2019] [Indexed: 11/28/2022]
Abstract
Animal synchrony is found in phylogenetically distant animal groups, indicating behavioral adaptations to different selective pressures and in different signaling modalities. A notable example of synchronous display is found in fiddler crabs in that males wave their single enlarged claw during courtship. They present species-specific signals, which are composed of distinctive movement signatures. Given that synchronous waving has been reported for several fiddler crab species, the display pattern could influence the ability of a given species to sufficiently adjust wave timing to allow for synchrony. In this study, we quantified the wave displays of fiddler crabs to predict their synchronous behavior. We combined this information with the group's phylogenetic relationships to trace the evolution of display synchrony in an animal taxon. We found no phylogenetic signal in interspecific variation in predicted wave synchrony, which mirrors the general nonphylogenetic pattern of synchrony across animal taxa. Interestingly, our analyses show that the phenomenon of synchronization stems from the peculiarities of display pattern, mating systems, and the complexity of microhabitats. This is the first study to combine mathematical simulations and phylogenetic comparative methods to reveal how ecological factors and the mechanics of animal signals affect the evolution of the synchronous phenomena.
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Affiliation(s)
- Daniela M Perez
- Research School of Biology, The Australian National University, Canberra, ACT 0200, Australia
| | - Enzo L Crisigiovanni
- Programa de Pós-Graduação em Ecologia e Conservação, Universidade Federal do Paraná, Curitiba, PR, 81531-990, Brazil.,Departamento de Física, Universidade Federal do Paraná, Curitiba, PR, 81531, Brazil
| | - Marcio R Pie
- Departamento de Zoologia, Departamento de Zoologia, Universidade Federal do Paraná, Curitiba, PR, 81531, Brazil
| | - Ana C Rorato
- Earth System Science Center, National Institute for Space Research (INPE), São José dos Campos, SP, 12227, Brazil
| | - Sergio R Lopes
- Departamento de Física, Universidade Federal do Paraná, Curitiba, PR, 81531, Brazil
| | - Sabrina B L Araujo
- Departamento de Física, Universidade Federal do Paraná, Curitiba, PR, 81531, Brazil.,Laboratório de Ecologia e Evolução de Interações, Biological Interactions, Universidade Federal do Paraná, Curitiba, PR, 81531, Brazil
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15
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Abstract
Abstract
The aggregation of courting males is widespread among animal taxa, yet we do not understand why males congregate and therefore intensify local competition for female attention. The most commonly invoked theoretical explanation is that females preferentially approach clustered males due to the many benefits they would gain, and clustered males would therefore have higher mating success. However, although theoretical explanations of aggregation formation are well advanced, empirical studies are scarce, especially in invertebrates. In fact, there is little evidence that females do prefer to approach clustered displayers over spaced displayers. Here we address this question by using robotic crabs to test female preferences in fiddler crabs (a visually displaying species) and show that females do not preferentially approach clustered males. We suggest that if this pattern is more widespread, the most commonly invoked explanation of courting aggregations is of limited use. We offer explanations for the strong clustering behavior we observe in this species and discuss the implications of this finding for the theoretical underpinnings of this research field.
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Affiliation(s)
- Daniela M Perez
- Research School of Biology, The Australian National University, Canberra, Australia
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16
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Esquer-Garrigos Y, Streiff R, Party V, Nidelet S, Navascués M, Greenfield MD. Pleistocene origins of chorusing diversity in Mediterranean bush-cricket populations ( Ephippiger diurnus). Biol J Linn Soc Lond 2019. [DOI: 10.1093/biolinnean/bly195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- Yareli Esquer-Garrigos
- CBGP, INRA, CIRAD, IRD, Université de Montpellier, Montpellier, France
- DGIMI, INRA, Université de Montpellier, Montpellier, France
- Université de Tours, Tours, France
| | - Réjane Streiff
- CBGP, INRA, CIRAD, IRD, Université de Montpellier, Montpellier, France
- DGIMI, INRA, Université de Montpellier, Montpellier, France
| | | | - Sabine Nidelet
- CBGP, INRA, CIRAD, IRD, Université de Montpellier, Montpellier, France
| | | | - Michael D Greenfield
- Université de Tours, Tours, France
- Department of Ecology and Evolutionary Biology, University of Kansas, Lawrence, KS, USA
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17
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Ravignani A, de Reus K. Modelling Animal Interactive Rhythms in Communication. Evol Bioinform Online 2019; 15:1176934318823558. [PMID: 30733626 PMCID: PMC6343447 DOI: 10.1177/1176934318823558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Accepted: 11/29/2018] [Indexed: 11/15/2022] Open
Abstract
Time is one crucial dimension conveying information in animal communication. Evolution has shaped animals' nervous systems to produce signals with temporal properties fitting their socio-ecological niches. Many quantitative models of mechanisms underlying rhythmic behaviour exist, spanning insects, crustaceans, birds, amphibians, and mammals. However, these computational and mathematical models are often presented in isolation. Here, we provide an overview of the main mathematical models employed in the study of animal rhythmic communication among conspecifics. After presenting basic definitions and mathematical formalisms, we discuss each individual model. These computational models are then compared using simulated data to uncover similarities and key differences in the underlying mechanisms found across species. Our review of the empirical literature is admittedly limited. We stress the need of using comparative computer simulations - both before and after animal experiments - to better understand animal timing in interaction. We hope this article will serve as a potential first step towards a common computational framework to describe temporal interactions in animals, including humans.
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Affiliation(s)
- Andrea Ravignani
- Artificial Intelligence Lab, Vrije Universiteit Brussel, Brussels, Belgium
| | - Koen de Reus
- Department Life Sciences, Erasmus University College, Erasmus University Rotterdam, Rotterdam, The Netherlands
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18
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Anichini M, Frommolt KH, Lehmann GU. To compete or not to compete: bushcricket song plasticity reveals male body condition and rival distance. Anim Behav 2018. [DOI: 10.1016/j.anbehav.2018.05.022] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Backwell PRY. Synchronous waving in fiddler crabs: a review. Curr Zool 2018; 65:83-88. [PMID: 30697243 PMCID: PMC6347057 DOI: 10.1093/cz/zoy053] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Accepted: 06/28/2018] [Indexed: 11/15/2022] Open
Abstract
Many animals that use acoustic communication synchronize their mate attraction signals: individuals precisely time their calls to overlap those of their neighbors. In contrast, synchrony in the mate attraction displays of species with visual/motion-based signals is rare. It has only been documented in five species of fiddler crabs. In all of them, small groups of males wave their single large claw in close synchrony. Here, I review what we know about synchrony in fiddler crabs, comparing the five species with each other to determine whether similar mechanisms and functions are common to all. I also propose future research questions that, if answered, would shed light on synchronous behavior in both visual and acoustic signallers.
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