Ultrasonic vocalizations and ontogenetic development in California mice (Peromyscus californicus)

摘要: This experiment investigated the time-course of behavioral and physical development in 18 male female pups from litters California mice. From 1 to 23 days age animals were observed for a 6-min observation period every other day, followed by neurobehavioral testing session. Ultrasonic vocalizations (UVs), coordinated movements, neuromotor indicators parameters measured. The production UVs peaked during first week development, remained stable 9 15 age, decreased abruptly thereafter. Females vocalized more than males after birth, although this difference only was statistically significant on third day. There an inverse relationship between emission movements. frequency dropped significantly day had displayed surface righting, able hear, begun opening their eyes compared with before. In conclusion, it appears that there is sex UVs, which intense at beginning development. Furthermore, ontogenetic patterns changes both females mice, are inversely related such as rearing, locomotion self-grooming.