Strain Differences in the Ultrasonic Behavior of Rats (Rattus Norvegicus)

摘要: Wistar rat pups are generally more “vocal” than Lister pups; the ultrasonic calls that they produce usually louder and emitted at a greater rate those of same age studied under similar conditions isolation or handling. These differences in behavior apparently not related to development homiothermy which follows course both strains. The infants two strains do show any marked duration frequency pattern consistent over treatment condition, but appear changes with certain parameters calls, while latter strain condition. Similar intensity calling were seen during aggressive encounters between adult males, these cannot be behavior. differ long “22 kHz” (Lister Wistar) shorter “50 (Wistar Lister), as well minimum (lower rats).