A Comparative Study of Isolation-Induced Ultrasonic Vocalization in Rodent Pups.

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  • MOTOMURA Nobuko
    Behavioral Neuroscience Laboratory, Department of Laboratory Animal Science, Nippon Veterinary and Animal Science University
  • SHIMIZU Keiko
    Behavioral Neuroscience Laboratory, Department of Laboratory Animal Science, Nippon Veterinary and Animal Science University
  • SHIMIZU Makoto
    Behavioral Neuroscience Laboratory, Department of Laboratory Animal Science, Nippon Veterinary and Animal Science University
  • AOKI-KOMORI Shinobu
    Behavioral Neuroscience Laboratory, Department of Veterinary Surgery, Nippon Veterinary and Animal Science University
  • TANIGUCHI Kazumi
    Department of Veterinary Anatomy, School of Veterinary Medicine and Animal Science, Kitasato University
  • SERIZAWA Isao
    Behavioral Neuroscience Laboratory, Department of Laboratory Animal Science, Nippon Veterinary and Animal Science University
  • SAITO Toru R.
    Behavioral Neuroscience Laboratory, Department of Laboratory Animal Science, Nippon Veterinary and Animal Science University

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  • Comparative Study of Isolation Induced Ultrasonic Vocalization in Rodent Pups

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Abstract

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°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 model 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 45kHz) in the rat and the Mongolian gerbil, and high (around 55 kHz) in the mouse.

Journal

  • Experimental Animals

    Experimental Animals 51 (2), 187-190, 2002

    Japanese Association for Laboratory Animal Science

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