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Animal linguistics in the making: the Urgency Principle and titi monkeys’ alarm system
In: ISSN: 0394-9370 ; Ethology Ecology and Evolution ; https://hal.inrae.fr/hal-03518874 ; Ethology Ecology and Evolution, Taylor & Francis, 2022, pp.1-17. ⟨10.1080/03949370.2021.2015452⟩ (2022)
Abstract: International audience ; The emergent field of animal linguistics applies linguistics tools to animal data in order to investigate potential linguistic-like properties of their communication. One of these tools is the “Urgency Principle”, a pragmatic principle stating that in an alarm sequence, calls providing information about the nature or location of a threat must come before those that do not. This theoretical principle has helped understand the alarm system of putty-nosed monkeys, but whether it is relevant for animal communication systems more generally remains to be tested. Moreover, while animal communication systems can convey information via a large set of encoding mechanisms, the Urgency Principle was developed for only one encoding mechanism, call ordering. Here, we propose to extend this principle to other encoding mechanisms and empirically test this with the alarm call system of black-fronted titi monkeys (Callicebus nigrifrons). We investigated how information about the context of emission unfolded with the emission of successive calls. Specifically, we analysed how contextual parameters influenced the gradual sequential organization of the first 50 calls in the sequence, using methods borrowed from computational linguistics and random forest algorithms. We hypothesized that, if the extended Urgency Principle reflected the sequential organization of titi monkey alarm call sequences, mechanisms encoding urgent information about the predatory situation should appear before encoding mechanisms that do not. Results supported the hypothesis that mechanisms encoding for urgent information relating to a predator event consistently appeared before mechanisms encoding for less-urgent social information. Our study suggests that the extended Urgency Principle applies more generally to animal communication, demonstrating that conceptual tools from linguistics can successfully be used to study nonhuman communication systems.
Keyword: [SCCO.LING]Cognitive science/Linguistics; [SDE.BE]Environmental Sciences/Biodiversity and Ecology; Callicebus nigrifrons; computational linguistics; formal linguistics; sequences; vocalisations
URL: https://hal.inrae.fr/hal-03518874
https://doi.org/10.1080/03949370.2021.2015452
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Animal linguistics in the making: the Urgency Principle and titi monkeys’ alarm system ...
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Animal linguistics in the making: the Urgency Principle and titi monkeys’ alarm system ...
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Dataset with all the computed metrics per sub-sequence ...
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Dataset including all random forests' % of variance explained ...
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Dataset with additional information on the audio recordings from predator presentations ...
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Dataset extracted from audio recordings from predator presentations (first 50 calls) ...
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R script for metric extraction, computation of random forests and extraction of the inflection point ...
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R script for metric extraction, computation of random forests and extraction of the inflection point ...
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Dataset with all the computed metrics per sub-sequence ...
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Dataset with additional information on the audio recordings from predator presentations ...
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Matrix of results ...
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Matrix of results ...
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Dataset extracted from audio recordings from predator presentations (first 50 calls) ...
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15
Digital contact does not promote wellbeing, but face-to-face contact does: A cross-national survey during the COVID-19 pandemic
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The Complexity and Phylogenetic Continuity of Laughter and Smiles in Hominids
In: Front Psychol (2021)
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The development of communication in alarm contexts in wild chimpanzees
In: ISSN: 0340-5443 ; EISSN: 1432-0762 ; Behavioral Ecology and Sociobiology ; https://hal.archives-ouvertes.fr/hal-02454678 ; Behavioral Ecology and Sociobiology, Springer Verlag, 2019, 73 (8), ⟨10.1007/s00265-019-2716-6⟩ (2019)
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Orangutans’ Comprehension of Zoo Keepers’ Communicative Signals
In: ISSN: 2076-2615 ; Animals ; https://hal.archives-ouvertes.fr/hal-02432323 ; Animals, MDPI, 2019, 9 (6), pp.300. ⟨10.3390/ani9060300⟩ (2019)
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The development of communication in alarm contexts in wild chimpanzees
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The development of communication in alarm contexts in wild chimpanzees
Dezecache, Guillaume; Crockford, Catherine; Zuberbühler, Klaus. - : Springer Berlin Heidelberg, 2019
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