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

2009 ◽  
Vol 80 (3) ◽  
pp. 175-188 ◽  
Author(s):  
Fabiana B. Gonçalves ◽  
Aline S. Belísio ◽  
Carolina V.M. Azevedo
Keyword(s):  
Activity Rhythm ◽  
Callithrix Jacchus ◽  
Circadian Activity ◽  
Common Marmosets ◽  
Nest Box ◽  
Circadian Activity Rhythm

Twilight transitions promote circadian entrainment to lengthening light-dark cycles

1996 ◽  
Vol 271 (3) ◽  
pp. R813-R818 ◽  
Author(s):  
Z. Boulos ◽  
M. Macchi ◽  
M. Terman
Keyword(s):  
Activity Rhythm ◽  
Constant Darkness ◽  
Circadian Activity ◽  
Nest Box ◽  
Circadian Activity Rhythm ◽  
Nest Boxes ◽  
Upper Limit ◽  
Upper Limits

The upper limits of entrainment of the circadian activity rhythm were compared in hamsters initially exposed to daily light-dark (LD) cycles with either abrupt (LD-rectangular) or simulated twilight (LD-twilight) transitions. Daytime illuminance (10 lx) and the total amount of light emitted per day were the same under the two LD cycles. One-half of the animals in each condition had access to dark nest boxes. The period of the LD cycles was then increased from 24 to 26 h, by 5 min per day. All animals in LD-twilight remained entrained to the lengthening cycle, whereas 60% of those in LD-rectangular began to free run well before the period of the cycle reached 26 h. These effects were independent of nest box availability. The lengthening LD cycles exerted clear aftereffects on the period of the rhythms in constant darkness, the magnitude of which was related to the efficacy of prior entrainment. The results indicate that twilight transitions raise the upper limit of entrainment to LD cycles, suggesting that their inclusion increases the strength of the LD zeitgeber.

scholarly journals Circadian activity rhythm in pre-pubertal and pubertal marmosets ( Callithrix jacchus ) living in family groups

2016 ◽  
Vol 155 ◽  
pp. 242-249 ◽  
Author(s):  
Paula R. Melo ◽  
Bruno S.B. Gonçalves ◽  
Alexandre A.L. Menezes ◽  
Carolina V.M. Azevedo
Keyword(s):  
Activity Rhythm ◽  
Callithrix Jacchus ◽  
Circadian Activity ◽  
Circadian Activity Rhythm ◽  
Family Groups

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

2020 ◽  
Vol 37 (7) ◽  
pp. 980-992
Author(s):  
Fabiana B. Gonçalves ◽  
Bruno S. B. Gonçalves ◽  
Jeferson S. Cavalcante ◽  
Carolina V. M. Azevedo
Keyword(s):  
Activity Rhythm ◽  
Callithrix Jacchus ◽  
Circadian Activity ◽  
Circadian Activity Rhythm
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