Abstract:The locomotor activity of two Virginia opossums was measured underD 24 and LD 12:12 conditions. Ss were inactive during the day and displayed two peaks of activity at night. The length of the activity period was approximately 24 h. Under LD 12:12 the nocturnal cycle was more pronounced than under D 24. The period length and topography of the . opossum's locomotor activity cycle are comparable to those obtained from other nocturnal mammals under similar lighting conditions. Cone & Cone (1968) demonstrated that … Show more
“…A number of investigators have studied the effects of the light-dark (LD) cycle upon activity (Ashby, 1972;D. M. Cone, 1973 Cone, 1968) and upon feeding and drinking behavior (Rusak & Zucker, 1974;Stephan, 1984).…”
“…A number of investigators have studied the effects of the light-dark (LD) cycle upon activity (Ashby, 1972;D. M. Cone, 1973 Cone, 1968) and upon feeding and drinking behavior (Rusak & Zucker, 1974;Stephan, 1984).…”
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