There were certain difference between male and female Amur tigers in time budget and activityrhythm.
结果表明，雌雄东北虎的行为时间分配和活动节律均存在一定的差异。
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The best-known ones, DeCoursey says, are circadian or daily rhythms such as the sleep-wake rhythm, daily activity rhythms, or jet lag and shift-work maladies.
The studies on the activityrhythm of rats have an important significance to the effective prevention of rat damage as well as the comprehensive measures in controlling rats.