The influence of social cues on circadian activity rhythm resynchronisation to the light–dark cycle in common marmosets<i>Callithrix jacchus</i>

Mendes, André L.B.; Menezes, Alexandre A.L.; Azevedo, Carolina Virginia Macêdo de

doi:10.1080/09291010701682658

Cited by 8 publications

(7 citation statements)

References 34 publications

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“…Recent data collected in our laboratory [Mendes et al, 2008] showed the influence of nest box availability on CAR in marmosets, extending the role of this resting place to marmoset maintenance. During LD phase shifts, marmosets not provided with nest boxes showed different responses to those observed by Erkert [1989] in animals with nest boxes.…”

Section: Introductionmentioning

confidence: 54%

“…Despite interindividual variation in the nest box condition under the LD cycle (12: 12), activity onset occurred before lights on and offset around 1 h before lights off, as observed by Menezes et al [1996b] in seminatural and by Erkert [1989] in LDcontrolled conditions. In contrast, in the no-nest-box condition, there was a small delay for activity onset, which occurred after or at lights on, and a pronounced delay for offset, as seen in the CAR profiles of marmosets studied by Silva et al [2005] and Mendes et al [2008] in a controlled LD condition. Moreover, the animals showed a smaller day-to-day variability in activity onsets and offsets.…”

Section: Discussionmentioning

confidence: 84%

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Effect of Nest Box Availability on the Circadian Activity Rhythm of Common Marmosets (Callithrix jacchus)

Gonçalves¹,

Belísio²,

Azevedo³

2009

IJFP

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The effect of nest box availability on the circadian activity rhythm (CAR) was compared in a diurnal primate kept in two conditions: with and without nest box, in a light-dark (LD) cycle (12:12) and constant light (LL). Marmosets kept in LD without nest box showed a longer duration of the activity phase (α), smaller day-to-day variability in activity onset and offset and higher levels of activity, particularly towards the end of the activity time. In LL, all animals maintained with nest box expressed free-running CAR, but without nest box, 3 of the 4 individuals showed relative coordination with the outdoor LD cycle, possibly due to social synchronization with captive marmosets maintained outdoors. All animals showed longer α and higher levels of activity without nest box. Thus, the availability of a nest box is an important aspect in maintaining marmosets, influencing CAR expression in this diurnal primate in LD and LL conditions, possibly due to differences in light exposure that induces masking. Further studies are needed to evaluate the effects of the unavailability of a nest box on CAR in LL conditions.

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Section: Introductionmentioning

confidence: 54%

Section: Discussionmentioning

confidence: 84%

Effect of Nest Box Availability on the Circadian Activity Rhythm of Common Marmosets (Callithrix jacchus)

Gonçalves¹,

Belísio²,

Azevedo³

2009

IJFP

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“…The effect of this interaction was observed in studies where the presence of a previously synchronized conspecific increased the spectral power and amplitude of the circadian temperature rhythm in Wistar rats (Cambras et al, 2011) and accelerated the resynchronization of the circadian activity rhythm to a new LD cycle in degus (Goel & Lee, 1995 and marmosets (Mendes et al, 2008).…”

Section: Introductionmentioning

confidence: 95%

“…Although in natural environments animals are subjected to photic, temperature, and social factors simultaneously, few studies have assessed the impact of the interactions between photic and nonphotic factors on circadian rhythms (Cambras et al, 2011, Goel & Lee, 1995Mendes et al, 2008). The effect of this interaction was observed in studies where the presence of a previously synchronized conspecific increased the spectral power and amplitude of the circadian temperature rhythm in Wistar rats (Cambras et al, 2011) and accelerated the resynchronization of the circadian activity rhythm to a new LD cycle in degus (Goel & Lee, 1995 and marmosets (Mendes et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Socially Adjusted Synchrony in the Activity Profiles of Common Marmosets in Light-Dark Conditions

Melo

Gonçalves

Menezes

et al. 2013

Chronobiology International

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Synchronized state of activity and rest might be attained by mechanisms of entrainment and masking. Most zeitgebers not only act to entrain but also to mask circadian rhythms. Although the light-dark (LD) cycle is the main zeitgeber of circadian rhythms in marmosets, social cues can act as weaker zeitgebers. Evidence on the effects of social entrainment in marmosets has been collected in isolated animals or in pairs where activity is not individually recorded. To characterize the synchronization between the daily activity profiles of individuals in groups under LD conditions, the motor activity of animals from five groups was continuously monitored using actiwatches for 15 days during the 5th, 8th, and 11th months of life of juveniles. Families consisting of twins (4 ♂♀/1 ♂♂) and their parents were maintained under controlled lighting (LD 12:12 h), temperature, and humidity conditions. Synchronization was evaluated through the synchrony between the circadian activity profiles obtained from the Pearson correlation index between possible pairs of activity profiles in the light and dark phases. We also calculated the phase-angle differences between the activity onset of one animal in relation to the activity onset of each animal in the group (ψ(on)). A similar procedure was performed for activity offset (ψ(off)). By visual analysis, the correlation between the activity profiles of individuals within each family was stronger than that of individuals from different families. A mixed-model analysis showed that within the group, the correlation was stronger between twins than between twins and their parents in all families, except for the family in which both juveniles were males. Because a twin is an important social partner for juveniles, a sibling is likely to have a stronger influence on its twin's activity rhythm than other family members. Considering only the light phase, the second strongest correlation was observed between the activity profiles of the individuals in the reproductive pair. Regarding the parameters ψ(on) and ψ(off), the juvenile/juvenile dyad had lower values than the other dyads, but these differences did not reach statistical significance in relation to all dyads. Comparing the results of the ψ(on) and ψ(off), and correlation indices, we suggest that the latter could detect differences between the animals that were not observed in the results of the phase-angle differences. These differences could be related to changes that occur during the active phase but not only in a particular phase, such as the temporal changes during the activity phase that characterize unimodal or bimodal patterns. Based on the differences in the correlations between individuals subjected to the same LD routine, we suggest that social cues modulate the circadian activity profiles of marmosets as a result of interactions between the animals within each group. Future studies are necessary to characterize the mechanisms of synchronization that are involved in this social modulation.

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“…In marmosets, social cues accelerate photic resynchronisation during phase delays. This effect may be associated with a greater light input due to the increase in animal activity in the presence of a previously synchronised conspecific (Mendes et al 2008).…”

Section: Animalmentioning

confidence: 99%

Conspecific vocalisations modulate the circadian activity rhythm of marmosets

Silva

Pontes

Cavalcante

et al. 2014

Biological Rhythm Research

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Conspecific vocalisations have an important ecological role for marmosets and likely modulate the circadian timing system. However, the effect of this specific cue on circadian activity rhythm (CAR) has not been evaluated. To analyse the synchroniser effect of conspecific vocalisations on CAR in marmosets, the motor activity of five isolated adult males was continuously recorded in rooms with constant dim light (~2 lx) and attenuated sound. All animals presented positive masking, four presented relative coordination and three presented temporary entrainment associated with the daily pattern of vocalisations from animals kept outdoors, similarly to previous studies that assessed social cues. Furthermore, most animals displayed a shortened circadian period in response to conspecific vocalisation pulses that were reproduced daily for 30 days under total darkness. This is evidence that a non-photic cue with ecological significance can modulate the CAR, reinforcing the role of conspecific vocalisation as an important zeitgeber for marmosets.

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The influence of social cues on circadian activity rhythm resynchronisation to the light–dark cycle in common marmosetsCallithrix jacchus

Cited by 8 publications

References 34 publications

Effect of Nest Box Availability on the Circadian Activity Rhythm of Common Marmosets (Callithrix jacchus)

Effect of Nest Box Availability on the Circadian Activity Rhythm of Common Marmosets (Callithrix jacchus)

Socially Adjusted Synchrony in the Activity Profiles of Common Marmosets in Light-Dark Conditions

Conspecific vocalisations modulate the circadian activity rhythm of marmosets

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