クマネズミと Wistar 系ラットの幼獣における超音波コール

概要

論文の詳細を見る
Ultrasonic calls caused by three stimulations of "isolation, " "handling" and "electricity" in 7-to 30-day-old Rattus rattus and 10-to 30-day-old Wistar rats (R. norvegicus) were examined. FVgrams (ultrasonic diagrams compiled by a FV-converter) were available for analysis of long-time-recorded ultrasound produced by R. rattus and Wistar rat pups. Analysis with FVgram was based on wave frequency at "peak component" of ultrasound, duration of ultrasonic calls, and pattern grouping of ultrasonic calls. Distribution curve of wave frequency at "peak component" showed that younger pups in both rat species used higher frequency. It also showed that among 30-day-old Wistar rats, females emitted calls of higher frequency than males. Distribution curve of duration of the calls showed that older pups in both rat species produced longer calls. So far as pattern groupings of ultrasonic calls on FVgram are concerned, five different types were identified with possible meanings for ultrasonic communication among rats.
日本衛生動物学会の論文
1989-06-15