Aging-related changes on social synchronization of circadian activity rhythm in a diurnal primate (Callithrix jacchus)

Gonçalves, Fabiana Barbosa; Gonçalves, Bruno S. B.; Cavalcante, Jeferson de Souza; Azevedo, Carolina Virginia Macedo de

Aging-related changes on social synchronization of circadian activity rhythm in a diurnal primate (Callithrix jacchus)

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dc.contributor.author	Gonçalves, Fabiana Barbosa
dc.contributor.author	Gonçalves, Bruno S. B.
dc.contributor.author	Cavalcante, Jeferson de Souza
dc.contributor.author	Azevedo, Carolina Virginia Macedo de
dc.date.accessioned	2020-12-15T18:00:00Z
dc.date.available	2020-12-15T18:00:00Z
dc.date.issued	2020-06-23
dc.description.resumo	The input of environmental time cues and expression of circadian activity rhythms may change with aging. Among nonphotic zeitgebers, social cues from conspecific vocalizations may contribute to the stability and survival of individuals of social species, such as nonhuman primates. We evaluated aging- related changes on social synchronization of the circadian activity rhythm (CAR) in a social diurnal primate, the common marmoset. The activity of 18 male marmosets was recorded by actiwatches in two conditions. (1) Experimental – 4 young adult (5 ± 2 yrs of age) and 4 older (10 ± 2 yrs of age) animals maintained under LD 12/12 h and LL in a room with full insulation for light but only partial insulation for sound from vocalizations of conspecifics maintained outdoors in the colony; and (2) Control – 10 young adult animals maintained outdoors in the colony (5 animals as a control per age group). In LL, the CAR of young adults showed more stable synchronization with controls. Among the aged marmosets, two free-ran with τ > 24 h, whereas the other two showed relative coordination during the first 30 days in LL, but free-ran thereafter. These differences were reflected in the “social” phase angles (ψon and ψoff) between rhythms of experimental and control animal groups. Moreover, the activity patterns of aged animals showed lower social synchrony with controls compared to young adults, with the time lags of the time series between each experimental group and control group being negative in aged and positive in young adult animals (t-test, p < 0.05). The index of stability of the CAR showed no differences according to age, while the intradaily variability of the CAR was higher in the aged animals during LD-resynchronization, who took additional days to resynchronize. Thus, the social modulation on CAR may vary with age in marmosets. In the aged group, there was a lower effect of social synchronization, which may be associated with aging-related changes in the synchro- nization and generation of the CAR as well as in system outputs	pt_BR
dc.identifier.citation	GONÇALVES, Fabiana Barbosa; GONÇALVES, Bruno S. B.; CAVALCANTE, Jeferson de Souza; AZEVEDO, Carolina Virginia Macedo de. Aging-related changes on social synchronization of circadian activity rhythm in a diurnal primate (Callithrix jacchus). Chronobiology International, [s. l.], v. 37, n. 7, p. 980-992, 23 jun. 2020. Disponível em: https://www.tandfonline.com/doi/abs/10.1080/07420528.2020.1773495?journalCode=icbi20. Acesso em: 04 nov. 2020. http://dx.doi.org/10.1080/07420528.2020.1773495.	pt_BR
dc.identifier.doi	10.1080/07420528.2020.1773495.
dc.identifier.issn	0742-0528
dc.identifier.issn	1525-6073
dc.identifier.uri	https://repositorio.ufrn.br/handle/123456789/31000
dc.language	en	pt_BR
dc.publisher	Taylor and Francis	pt_BR
dc.rights	Attribution 3.0 Brazil	*
dc.rights.uri	http://creativecommons.org/licenses/by/3.0/br/	*
dc.subject	Circadian activity rhythm	pt_BR
dc.subject	Aging	pt_BR
dc.subject	Social entrainment	pt_BR
dc.subject	Nonphotic cues	pt_BR
dc.subject	Behavioral rhythms	pt_BR
dc.subject	Marmosets	pt_BR
dc.title	Aging-related changes on social synchronization of circadian activity rhythm in a diurnal primate (Callithrix jacchus)	pt_BR
dc.type	article	pt_BR