title: Vocal coselection in rat pup ultrasonic vocalizations.
abstract: Selective breeding and natural selection that select for one trait often bring along other correlated traits via coselection. Selective breeding for an infantile trait, high or low call rates of isolation-induced ultrasonic vocalization of rat pups, also alters functions of some brain systems and emotional behaviors throughout life. We examined the effect of breeding for call rate on acoustic parameters that are of communicative significance. Selecting for higher call rate produced calls of significantly increased amplitude and bandwidth relative to a randomly bred line. Selecting for lower rate produced calls of decreased duration. These nonmorphological, functional trait changes demonstrate enhanced communicatory potential and energy expenditure for the High line and the opposite for the Low line. This demonstration of coselection in a communicatory system suggests an underlying heritable suite of linked acoustic vocalization characteristics that in noisy environments could enhance dam-pup communication and lead to selection of emotionality traits with beneficial responses to stress.
authors.affiliation: Biopyschology and Behavioral Neuroscience Program The Graduate Center of the City University of New York 365 5th Ave New York New York 10016.
authors.forename: Heather R
authors.identifier: 0000-0002-4869-8706
authors.initials: HR
authors.lastname: Spence
authors.affiliation: Department of Computer Science Boston College 140 Commonwealth Avenue Chestnut Hill Massachusetts.
authors.forename: Ali M
authors.initials: AM
authors.lastname: Aslam
authors.affiliation: Division of Developmental Neuroscience New York State Psychiatric Institute & Department of Psychiatry Columbia University College of Physicians and Surgeons 630 W 168th St New York New York.
authors.forename: Myron A
authors.initials: MA
authors.lastname: Hofer
authors.affiliation: Division of Developmental Neuroscience New York State Psychiatric Institute & Department of Psychiatry Columbia University College of Physicians and Surgeons 630 W 168th St New York New York.
authors.forename: Susan A
authors.initials: SA
authors.lastname: Brunelli
authors.affiliation: Division of Developmental Neuroscience New York State Psychiatric Institute & Department of Psychiatry Columbia University College of Physicians and Surgeons 630 W 168th St New York New York.
authors.forename: Harry N
authors.initials: HN
authors.lastname: Shair
keywords: Behavior; development; heritability; selective breeding; signaling; ultrasonic vocalization