Abstract：To test the perceptual abilities of root voles (Microtus oeconomus) to recognize their opposite-sex relatives,behavioral response patterns were recorded in a behavioral choice case. The urine odors from different kinships,which relationships were 0,0.25,and 0.5 respectively,were used as odorants. The results indicated:Female root voles showed evident differences to the 3 kinds of odors. There were significant differences in approach latency and sniff time among different stimuli. The differences in sniff frequency and countermarks among different stimuli were non-significant. Male root voles showed no bias to the 3 kinds of odors. There were non-significant differences in approach latency and sniff time among different stimuli. The differences in sniff frequency and countermarks among different stimuli also were non-significant either. In conclusions,female root voles can discriminate urine odors from different kinship opposite-sex individuals but males cannot.
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