Erffmeyer E S
Folia Primatol (Basel). 1982;38(3-4):240-9. doi: 10.1159/000156060.
The behavior of rhesus monkeys (Macaca mulatta) was observed via videotape recording during the 12 hour period from 6.00 p.m. to 6.00 a.m. Adult animals were housed in male/female pairs under one of three cage conditions: individual cage, mating cage and a larger 'group' cage. 20 categories of behavior were assessed and the resultant behavior was described and quantitatively compared across cage conditions. The animals spent almost the entire night in a sitting position, either alone or while huddling with another animal. Sitting and huddling behavior are near-perfect complements to each other in terms of the frequency of occurrence; taken together they account for almost the entire nocturnal behavior. Other activity rarely displaces these behaviors. The animals tended to be relatively active in the early evening. As night fell, they settled down to relative inactivity, which they maintained until the morning. The activity level gradually increased as dawn approached.
在下午6点至上午6点这12小时期间，通过录像记录观察恒河猴（猕猴）的行为。成年动物以雄雌配对的方式饲养在三种笼子条件之一中：单独笼子、交配笼子和较大的“群体”笼子。评估了20种行为类别，并描述了由此产生的行为，并在不同笼子条件下进行了定量比较。这些动物几乎整个晚上都坐着，要么单独坐着，要么与另一只动物挤在一起。就发生频率而言，坐着和挤在一起的行为几乎是完美的互补行为；它们加起来几乎占了整个夜间行为。其他活动很少取代这些行为。这些动物在傍晚时分往往相对活跃。夜幕降临时，它们开始变得相对不活跃，并一直保持到早晨。随着黎明临近，活动水平逐渐增加。
