Abstract
There has been a revival of interest recently in the ultrasonic calls of infant rodents as investigators are using them to assess neurobehavioral development and animal models of anxiety. We compared the rates of ultrasonic calling of infant mice of two genotypes in two situations, cold and rotation. The subjects of study were 169 mouse pups from 29 litters and of two F1 genotypes, C57BL/10J × DBA/2J and C57BL/10J × SJL/J. Half of each litter was recorded in a cool situation for 20 seconds and the other half was recorded while rotating at 10 rpm for 20 seconds. All pups were recorded on days of age 2 to 8. Rotation elicited calling at about twice the rate as cool temperature on each day of age and on average across days; situation (cold or rotation) accounted for over 50% of the variation between litters. Genotype also altered call rate, and on some days situation and genotype interacted. In studies of neurobehavioral development and the effects of pharmacological agents on infant mice, it is particularly important to understand the roles of the stimuli and genotypes employed.
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Hahn, M.E., Schanz, N. The Effects of Cold, Rotation, and Genotype on the Production of Ultrasonic Calls in Infant Mice. Behav Genet 32, 267–273 (2002). https://doi.org/10.1023/A:1019728813891
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DOI: https://doi.org/10.1023/A:1019728813891