Spontaneous Yawning and its Potential Functions in South American Sea Lions (Otaria favescens)

Spontaneous yawning is a widespread behaviour in vertebrates. However, data on marine mammals are scarce. In this study, we tested some hypotheses on the functions of yawning in a captive group of South American sea lions (Otaria favescens). According to the Dimorphism Hypothesis, species showing lo...

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Detalhes bibliográficos
Autores: Palagi, Elisabetta, Guillén Salazar, Federico, Llamazares Martín, Clara
Formato: artículo
Fecha de publicación:2019
País:España
Recursos:Universidad Católica de Valencia San Vicente Mártir
Repositorio:RIUCV. Repositorio de la Universidad Católica de Valencia San Vicente Mártir
Idioma:inglés
OAI Identifier:oai:riucv.ucv.es:20.500.12466/3835
Acesso em linha:http://hdl.handle.net/20.500.12466/3835
Access Level:acceso abierto
Palavra-chave:South America sea lions
Pinnipedia
2408 Etología
2401.19 Zoología Marina
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spelling Spontaneous Yawning and its Potential Functions in South American Sea Lions (Otaria favescens)Palagi, ElisabettaGuillén Salazar, FedericoLlamazares Martín, ClaraSouth America sea lionsPinnipedia2408 Etología2401.19 Zoología MarinaSpontaneous yawning is a widespread behaviour in vertebrates. However, data on marine mammals are scarce. In this study, we tested some hypotheses on the functions of yawning in a captive group of South American sea lions (Otaria favescens). According to the Dimorphism Hypothesis, species showing low levels of sexual dimorphism in canine size do not show sex diferences in yawning distribution; this was supported by our fndings, since yawning did not difer between the sexes. Yawning was more frequently performed during resting/sleeping contexts, thus supporting the Drowsiness Hypothesis. Yawning and self-scratching are considered reliable indicators of short-term anxiety in sea lions, since they immediately increased after conficts both in aggressors and victims (Social Distress Hypothesis supported). In the long-term, yawning was not correlated with individuals’ dominance status, thus showing that anxiety is similarly experienced by dominants and subordinates. The last two fndings can be explained by the social competition of this species, that involves individuals independently from their sex, age or ranking status. Therefore, the exposure to frequent stressful events can induce similar levels of anxiety in all the subjects (Resource Inequity Hypothesis supported). In conclusion, spontaneous yawning in sea lions seems to share similar functions with other social mammals, suggesting that this behaviour is a possible plesiomorphic trait.20242024-01-2420192019-01-0120192019-01-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/20.500.12466/3835reponame:RIUCV. Repositorio de la Universidad Católica de Valencia San Vicente Mártirinstname:Universidad Católica de Valencia San Vicente MártirInglésengopen accesshttp://purl.org/coar/access_right/c_abf2Atribución 4.0 Internacionalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:riucv.ucv.es:20.500.12466/38352026-06-19T08:32:07Z
dc.title.none.fl_str_mv Spontaneous Yawning and its Potential Functions in South American Sea Lions (Otaria favescens)
title Spontaneous Yawning and its Potential Functions in South American Sea Lions (Otaria favescens)
spellingShingle Spontaneous Yawning and its Potential Functions in South American Sea Lions (Otaria favescens)
Palagi, Elisabetta
South America sea lions
Pinnipedia
2408 Etología
2401.19 Zoología Marina
title_short Spontaneous Yawning and its Potential Functions in South American Sea Lions (Otaria favescens)
title_full Spontaneous Yawning and its Potential Functions in South American Sea Lions (Otaria favescens)
title_fullStr Spontaneous Yawning and its Potential Functions in South American Sea Lions (Otaria favescens)
title_full_unstemmed Spontaneous Yawning and its Potential Functions in South American Sea Lions (Otaria favescens)
title_sort Spontaneous Yawning and its Potential Functions in South American Sea Lions (Otaria favescens)
dc.creator.none.fl_str_mv Palagi, Elisabetta
Guillén Salazar, Federico
Llamazares Martín, Clara
author Palagi, Elisabetta
author_facet Palagi, Elisabetta
Guillén Salazar, Federico
Llamazares Martín, Clara
author_role author
author2 Guillén Salazar, Federico
Llamazares Martín, Clara
author2_role author
author
dc.contributor.none.fl_str_mv
dc.subject.none.fl_str_mv South America sea lions
Pinnipedia
2408 Etología
2401.19 Zoología Marina
topic South America sea lions
Pinnipedia
2408 Etología
2401.19 Zoología Marina
description Spontaneous yawning is a widespread behaviour in vertebrates. However, data on marine mammals are scarce. In this study, we tested some hypotheses on the functions of yawning in a captive group of South American sea lions (Otaria favescens). According to the Dimorphism Hypothesis, species showing low levels of sexual dimorphism in canine size do not show sex diferences in yawning distribution; this was supported by our fndings, since yawning did not difer between the sexes. Yawning was more frequently performed during resting/sleeping contexts, thus supporting the Drowsiness Hypothesis. Yawning and self-scratching are considered reliable indicators of short-term anxiety in sea lions, since they immediately increased after conficts both in aggressors and victims (Social Distress Hypothesis supported). In the long-term, yawning was not correlated with individuals’ dominance status, thus showing that anxiety is similarly experienced by dominants and subordinates. The last two fndings can be explained by the social competition of this species, that involves individuals independently from their sex, age or ranking status. Therefore, the exposure to frequent stressful events can induce similar levels of anxiety in all the subjects (Resource Inequity Hypothesis supported). In conclusion, spontaneous yawning in sea lions seems to share similar functions with other social mammals, suggesting that this behaviour is a possible plesiomorphic trait.
publishDate 2019
dc.date.none.fl_str_mv 2019
2019-01-01
2019
2019-01-01
2024
2024-01-24
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/20.500.12466/3835
url http://hdl.handle.net/20.500.12466/3835
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución 4.0 Internacional
http://creativecommons.org/licenses/by/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución 4.0 Internacional
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:RIUCV. Repositorio de la Universidad Católica de Valencia San Vicente Mártir
instname:Universidad Católica de Valencia San Vicente Mártir
instname_str Universidad Católica de Valencia San Vicente Mártir
reponame_str RIUCV. Repositorio de la Universidad Católica de Valencia San Vicente Mártir
collection RIUCV. Repositorio de la Universidad Católica de Valencia San Vicente Mártir
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,301629

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