Non-Vocal Behaviors Are More Frequent During the Decisive Negotiation Phases in Barn Owl Siblings
Autor: | Isabelle Henry, Andrea Romano, Aurélie Vermunt, Raphaëlle Flint, Amélie N. Dreiss, Sarah J. Bates, Charlène A. Ruppli, Alexandre Roulin |
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Rok vydání: | 2020 |
Předmět: |
0106 biological sciences
Tyto alba 010603 evolutionary biology 01 natural sciences Article Arousal 03 medical and health sciences behavior gesture multiple signals negotiation turn-taking lcsh:Zoology lcsh:QL1-991 Sibling 030304 developmental biology Foot (prosody) 0303 health sciences Communication lcsh:Veterinary medicine General Veterinary biology business.industry Barn-owl Tyto Turn-taking biology.organism_classification lcsh:SF600-1100 Animal Science and Zoology Barn business Psychology Gesture |
Zdroj: | Animals : an Open Access Journal from MDPI Animals, Vol 10, Iss 1777, p 1777 (2020) Animals Volume 10 Issue 10 Animals, vol. 10, no. 10, pp. E1777 |
ISSN: | 2076-2615 |
Popis: | Animals produce vibrations or noises by means of body movements, which can play a role in communication. These behaviors enhance signal transmission or receiver attention and could be specifically used during turn-taking phases of a reciprocal exchange of signals. In the barn owl Tyto alba, nestlings vocalize one after the other to negotiate which individual will have priority access to the impending prey item to be delivered by the parents. Owlets adjust their vocalization to their own hunger level and to their siblings&rsquo vocalization, withdrawing from the contest in front of highly vocal, and hence hungry, motivated nestmates. As sibling negotiation is a multicomponent display, we examined whether body movements could also be part of the negotiation process. To this end, we analyzed whether the vocalizations of one nestling affected its nestmate&rsquo s movements in three separate experiments: in natural nests, in the lab, and using a playback procedure. Nestling barn owls move in a variety of ways, such as repeated tapping of the floor with a foot, scratching the floor with claws, or flapping wings. Body movements were more frequent during the turn-taking phases of vocal interactions, when siblings emitted longer calls and at a greater rate. Once an individual monopolized vocal activity, siblings became less vocal and less active. Moreover, owlets produced more noisy body movements during the phases of vocal interactions which are crucial to prevail in negotiation. Non-vocal physical activities might reinforce vocal signals during sibling to sibling (sib&ndash sib) interactions, or reflect owlets&rsquo arousal, in the critical period during which they vocally settle which individual will dominate the competition. |
Databáze: | OpenAIRE |
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