Ontogenetic Changes of Ultrasonic Vocalizations Emitted from Infant Rats
Autor: | Masahiro Katou, Toru R. Saito, Makoto Yokosuka, Takako Nishiya, Haruo Hashimoto, Naoki Moritani, Pudcharaporn Kromkhun, Minoru Tanaka |
---|---|
Rok vydání: | 2007 |
Předmět: |
Male
Sound Spectrography Behavior Animal General Veterinary Ontogeny Body Weight Physiology General Medicine Anatomy Biology General Biochemistry Genetics and Molecular Biology Body Temperature Rats Animals Newborn Stress Physiological Animals Female Animal Science and Zoology Rats Wistar Vocalization Animal Cold stress |
Zdroj: | Experimental Animals. 56:315-318 |
ISSN: | 1881-7122 1341-1357 |
Popis: | Ontogenetic changes of USVs were investigated to establish an index of stress in infant rats. The USVs were obtained by exposing infant rats to cold stress and were analyzed by real-time spectrography. USV waveforms consisted of four types, R-I, II, III and IV. These USVs were closely monitored at the age of 3-7 days in both sexes. From day 14, the frequency and incidence of USVs gradually decreased and had disappeared completely at the age of 21 days. Therefore, USVs should be useful in estimating the stress of infant rats between the ages of 3-7 days. |
Databáze: | OpenAIRE |
Externí odkaz: |