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Rhythm and synchrony in animal movement and communication

Current Zoology 2019年第1期65卷 77-81页

作者： andrea ravignani Artificial Intelligence Lab Vrije Universiteit Brussel Brussels Belgium Research Department Sealcentre Pieterburen Pieterburen The Netherlands

Introduction Animal communication and motoric behavior develop over time. Often, this temporal dimension has communicative relevance and is organized according to structural patterns. In other words, time is a crucial dimension for rhythm and synchrony in animal movement and communication. Rhythm is defined as temporal structure at a second-millisecond time scale (Kotz et al. 2018). Synchrony is defined as precise co-occurrence of 2 behaviors in time (ravignani .2017).

关键词： Introduction Animal motoric behavior communicative relevance

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How small could a pup sound？ The physical bases of signaling body size in harbor seals

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Current Zoology 2017年第4期63卷 457-465页

作者： andrea ravignani Stephanie GROSS Maxime GARCIA Ana RUBIO-GARCIA Bart DE BOER Veterinary & Research Department Sealcentre Pieterburen Hoofdstraat 94a Pieterburen AG 9968 The Netherlands Artificial Intelligence Laboratory Vrije Universiteit Brussel Pleinlaan 2 Brussels 1050 Belgium Language and Cognition Department Max Planck Institute for Psycholinguistics Wundtlaan 1 Nijmegen XD 6525 The Netherlands Institute for Terrestrial and Aquatic Wildlife Research University of Veterinary Medicine Hannover Foundation Werftstrasse 6 Buesum 25761 Germany ENES Lab/Neuro-PSI CNRS UMR9197 University of Lyon/Saint Etienne 23 rue Paul Michelon 42023 Saint-Etienne cedex 2 France

Vocal communication is a crucial aspect of animal behavior. The mechanism which most mam- mals use to vocalize relies on three anatomical components. First, air overpressure is generated in- side the lower vocal tract. Second, as the airstream goes through the glottis, sound is produced via vocal fold vibration. Third, this sound is further filtered by the geometry and length of the upper vocal tract. Evidence from mammalian anatomy and bioacoustics suggests that some of these three components may covary with an animal＇s body size. The framework provided by acoustic al- Iometry suggests that, because vocal tract length （VTL） is more strongly constrained by the growth of the body than vocal fold length （VFL）, VTL generates more reliable acoustic cues to an animal＇s size. This hypothesis is often tested acoustically but rarely anatomically, especially in pinnipeds. Here, we test the anatomical bases of the acoustic allometry hypothesis in harbor seal pups Phoca vitulina. We dissected and measured vocal tract, vocal folds, and other anatomical features of 15 harbor seals post-mortem. We found that, while VTL correlates with body size, VFL does not. This suggests that, while body growth puts anatomical constraints on how vocalizations are filtered by harbor seals＇ vocal tract, no such constraints appear to exist on vocal folds, at least during puppy- hood. It is particularly interesting to find anatomical constraints on harbor seals＇ vocal tracts, the same anatomical region partially enabling pups to produce individually distinctive vocalizations.

关键词： acoustic allometry honest signaling larynx pinniped vocal tract.

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Isochronous singing in 3 crested gibbon species(Nomascus spp.)

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Current Zoology 2024年第3期70卷 291-297页

作者： Chiara De Gregorioa Teresa Raimondi Valeria Bevilacqua Chiara Pertosa Daria Valente Filippo Carugati Francesca Bandoli Livio Favaro Brice Lefaux andrea ravignani Marco Gamba Department of Life Sciences and Systems Biology University of Turinvia Accademia Albertina 13Torino 10125Italy Department of Biology University of PaduaVia VIII Febbraio2Padova 35122Italy Giardino Zoologico di Pistoia Via Pieve a Celle160/APistoia 5110Italy Botanical and Zoological Garden of Mulhouse 11 Av.de la 1ère Division BlindéeMulhouse 68100France Comparative Bioacoustics Group Max Planck Institute for PsycholinguisticsWundtlaan 1Nijmegen 6525 XDThe Netherlands Center for Music in the Brain Department of Clinical MedicineAarhus UniversityBuilding 1710Universitetsbyen 38000AarhusDenmark Department of Human Neuroscience Sapienza University of RomeViale Regina Elena 334Rome 00185Italy

The search for common characteristics between the musical abilities of humans and other animal species is still taking its frst *** of the most promising aspects from a comparative point of view is the analysis of rhythmic components,which are crucial features of human communicative performance but also well-identifable patterns in the vocal displays of other ***,the study of rhythm is becoming essential to understand the mechanisms of singing behavior and the evolution of human *** fndings provided evidence that particular rhythmic structures occur in human music and some singing animal species,such as birds and rock hyraxes,but only 2 species of nonhuman primates have been investigated so far(Indri indri and Hylobates lar).Therefore,our study aims to consistently broaden the list of species studied regarding the presence of rhythmic *** investigated the temporal organization in the singing of 3 species of crested gibbons(Nomascus gabriellae,Nomascus leucogenys,and Nomascus siki)and found that the most prominent rhythmic category was ***,we found slight variation in songs’tempo among species,with *** and *** singing with a temporal pattern involving a gradually increasing tempo(a musical accelerando),and *** with a more regular ***,we show how the prominence of a peak at the isochrony establishes itself as a shared characteristic in the small apes considered so far.

关键词： accelerando isochrony music rhythm singing primates song tempo

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Ontogeny of vocal rhythms in harbor seal pups: an exploratory study

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Current Zoology 2019年第1期65卷 107-120页

作者： andrea ravignani Christopher T. Kello Koen de Reus Sonja A KoTz Simone Dalla BELLA Margarita Mendez-Arostegui Beatriz Rapado-Tamarit Ana Rubio-Garcia Bart de BoER Research Department Sealcentre Pieterburen Pieterburen The Netherlands Artificial Intelligenee Lab Vrije Universiteit Brussel Brussels Belgium Cognitive and Information Sciences University of California Merced CA USA Basic and Applied NeuroDynamics Lab Faculty of Psychology and Neuroscience Department of Neuropsychology & Psychopharmacology Maastricht University Maastricht The Netherlands Department of Neuropsychology Max-Planck Institute for Human Cognitive and Brain Sciences Leipzig Germany International Laboratory for Brain Music and Sound Research (BRAMS) Montreal QC Canada Department of Psychology University of Montreal Montreal QC Canada Department of Cognitive Psychology WSFiZ in Warsaw Warsaw Poland

Puppyhood is a very active social and vocal period in a harbor seal's life Ph oca vitulina. An important feature of vocalizations is their temporal and rhythmic structure, and understanding vocal timing and rhythms in harbor seals is critical to a cross-species hypothesis in evolutionary neuroscience that links vocal learning, rhythm perception, and synchronization. This study utilized analytical techniques that may best capture rhythmic structure in pup vocalizations with the goal of examining whether (1) harbor seal pups show rhythmic structure in their calls and (2) rhythms evolve over time. Calls of 3 wild-born seal pups were recorded daily over the course of 1-3 weeks;3 temporal features were analyzed using 3 complementary techniques. We identified temporal and rhythmic structure in pup calls across different time windows. The calls of harbor seal pups exhibit some degree of temporal and rhythmic organization, which evolves over puppyhood and resembles that of other species' in teractive comm un icati on. We suggest n ext steps for investigating call structure in harbor seal pups and propose comparative hypotheses to test in other pinniped species.

关键词： bioacoustics pinnipeds rhythm timing vocal development

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