Abstract: The daily rhythm of five small mammals, i.e. the common Chinese zoker, Myospalax fontanieri, the plateau pika, Ochotona curzoniae, the root vole, Microtus oeconomus, the Norway rat, Rattus norvegicus, and the house mouse,Mus musculus, were studied under laboratory conditions in Aug. to Dec., 1980.The Chinese zoker, a fossorial species, is polyphasic in daily rhythm. It is active both in daytime and in night.Among the other four animals, plateau pika is most diurnal. Norway rat and house mouse are noctural in activities. The root vole is an untypically noctural rodent. The metabolic rate is higher when the animals are in their active period.The activity phases are coincided with sunrise and sunset respectively, indicating that a synchronization with the light cycle is existed, but in the fossorial zoker, it is not so correlated.

摘要： 在一昼夜中,各种动物的活动均有一定的周期性,其活动期和安静期常有规律地交替变换着。本文研究了五种小哺乳动物:中华鼢鼠（Myosalax fontanierii）高原鼠兔（Ochotona curzoniae）根田鼠（Microtus oeconomus）小家鼠（Mus musculus）和褐家鼠（Rattus norvegicus）的活动节律,前3种所见报道甚少。