Motomura Nobuko, Shimizu Keiko, Shimizu Makoto, Aoki-Komori Shinobu, Taniguchi Kazumi, Serizawa Isao, Saito Toru R
Behavioral Neuroscience Laboratory, Department of Laboratory Animal Science, Nippon Veterinary and Animal Science University, Musashino, Tokyo 180-8602, Japan.
Exp Anim. 2002 Apr;51(2):187-90. doi: 10.1538/expanim.51.187.
The purpose of this study was to determine whether species differences in neonatal vocalizations of rodent pups could be observed. Ultrasonic vocalizations of pups of 5 rodent species, mouse (ICR), vole (Microtus arvalis), Syrian hamster, rat (Wistar-Imamichi), and Mongolian gerbil were recorded from 3 to 15 or 21 days of age. Recordings were made under conditions of separation from mothers and litter mates in a cooled chamber (approximately 10 degrees C). The major species differences observed were age specific and species specific frequencies. The Mongolian gerbil displayed a different frequency change with age. Namely, the day on which ultrasonic vocalizations ceased was delayed in Mongolian gerbil compared with the other rodents. The modal peak frequencies of ultrasound emitted from pups at 3 days of age were low (around 35 kHz) in the vole and the Syrian hamster, medium (around 45 kHz) in the rat and the Mongolian gerbil, and high (around 55 kHz) in the mouse.
本研究的目的是确定是否能观察到啮齿动物幼崽新生期发声的物种差异。记录了5种啮齿动物幼崽的超声波发声，分别是小鼠（ICR）、田鼠（草原田鼠）、叙利亚仓鼠、大鼠（Wistar-Imamichi）和蒙古沙鼠，记录时间为3至15天或21天龄。记录是在冷却室（约10摄氏度）中与母亲和同窝幼崽分离的条件下进行的。观察到的主要物种差异是特定年龄和特定物种的频率。蒙古沙鼠随着年龄的增长表现出不同的频率变化。也就是说，与其他啮齿动物相比，蒙古沙鼠超声波发声停止的日期有所延迟。3日龄幼崽发出的超声波的模态峰值频率在田鼠和叙利亚仓鼠中较低（约35千赫兹），在大鼠和蒙古沙鼠中为中等（约45千赫兹），在小鼠中较高（约55千赫兹）。
