Parameters of the cosinor equations describing the pregnant capuchin circadian locomotor activity and body temperature rhythms 96 hours before delivery and those of the temperature rhythm in their newborns (mean ± SEM).

LD: photoperiod 14∶10 during pregnancy and post delivery, lights on at 0700 hours; LL: continuous light during pregnancy and post delivery, LL+ M: continuous light during pregnancy+daily dose of melatonin at 1800 hours until delivery followed by continuous light post delivery. LD = 6; LL = 5, LL+ M = 4. A = amplitude, Φ = acrophase, *P<0.05 vs LD; **P<0.05 vs Locomotor activity rhythm; Watson Williams test.