Abstract:
:Behavioral and physiological effects of alarm pheromones emanating from stressed conspecific animals were investigated. Experimentally naive male Wistar rats were exposed to the test chambers containing alarm pheromones, which had been released by other rats receiving foot shocks in the same chamber beforehand. Along with behavioral analysis, the heart rate (HR) and core body temperature (cBT) were measured simultaneously using a biotelemetory system. Exposure to the alarm pheromones increased freezing, sniffing and walking and decreased resting as compared with rats exposed to control odors. In addition, these pheromone-exposed animals showed consistent increases in body temperature, i.e., stress-induced hyperthermia. After exposure to the alarm substances, immunoreactivity to nuclear Fos protein in the mitral cell layer in the accessory olfactory bulb (AOB) also increased compared with the reaction to control odors. These results suggest that an alarm pheromone enhances stress responses of conspecific animals both behaviorally and physiologically, and that these effects are mediated via activation of the AOB.
journal_name
Physiol Behavjournal_title
Physiology & behaviorauthors
Kikusui T,Takigami S,Takeuchi Y,Mori Ydoi
10.1016/s0031-9384(00)00370-xsubject
Has Abstractpub_date
2001-01-01 00:00:00pages
45-50issue
1-2eissn
0031-9384issn
1873-507Xpii
S0031-9384(00)00370-Xjournal_volume
72pub_type
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