Neonatal ultrasounds elicited by odor cues.
Ultrasounds were monitored from neonatal rats following placement on 1 of 5 types of bedding material. Odors associated with the home cage or an adult male inhibited neonatal ultrasonic signaling. Odors associated with a novel lactating female elicited initially high rates of signaling, the rate lowering across the age range of pups tested. Odors associated with a novel virgin female or with an absence of animal odors elicited increasing rates of signaling across the age range tested.
D000367:Age Factors; D000818:Animals; D000831:Animals, Newborn; D003463:Cues; D004192:Discrimination, Psychological; D005260:Female; D008297:Male; D009812:Odorants; D051381:Rats; D012903:Smell; D014465:Ultrasonics; D014828:Vocalization, Animal