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Influence of photoperiod on conspecific odor preferences of adult male Brandt's vole (Microtus brandti)



Influence of photoperiod on conspecific odor preferences of adult male Brandt's vole (Microtus brandti)



Acta Theriologica Sinica 24(4): 304-310



The odor preferences and the changes of behavioral strategy of male adult Brandt's vole in different photoperiods were studied. All male actors showed more social investigation on the odors of long-photopetiod (LD) males/females than those of short-photoperiod (SD) male/female donors in a 30-min odor choice test. LD males presented more sniffing and digging significantly to the substrates of unfamiliar opposite-sex/same-sex individual scents than SD males. While, exposed to the substrate of diestrous female, LD and SD male did not differ in the behavior of sniffing and digging. Male voles preferred to staying in the odor chamber with LD male scents over that of SD males. LD male actors spent more time on staying in the odor chamber with LD female substrate than that of SD female substrate, while SD male actors showed no difference in the duration of visit between LD and SD female odor chambers. LD males preferred the scents of LD estrous females to those of LD diestrous donors, and presented no significant difference to the SD estrous and diestrous female odors. SD male actors showed more sniffing to the odor of LD/SD estrous females than that of diestrous females on the frequency of the behavior. Those results suggested that the changes in Brandt's vole's odor emissions and odor preferences were associated with the changes of the photoperiod, and individual scents of the vole carried the information of seasonal changes. Odors released in long-photoperiod lead to more sexual attractions than those of emitted in short-photoperiod; short-photoperiod might restrain the estrus of females and the sexual behavior of males.

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Accession: 012210587

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