Early-Life Social Isolation Influences Mouse Ultrasonic Vocalizations during Male-Male Social Encounters.

Autor: Keesom SM; Department of Biology, Indiana University, Bloomington, Indiana, United States of America., Finton CJ; Department of Biology, Indiana University, Bloomington, Indiana, United States of America., Sell GL; Department of Biology, Indiana University, Bloomington, Indiana, United States of America., Hurley LM; Department of Biology, Indiana University, Bloomington, Indiana, United States of America.
Jazyk: angličtina
Zdroj: PloS one [PLoS One] 2017 Jan 05; Vol. 12 (1), pp. e0169705. Date of Electronic Publication: 2017 Jan 05 (Print Publication: 2017).
DOI: 10.1371/journal.pone.0169705
Abstrakt: Early-life social isolation has profound effects on adult social competence. This is often expressed as increased aggression or inappropriate displays of courtship-related behaviors. The social incompetence exhibited by isolated animals could be in part due to an altered ability to participate in communicatory exchanges. House mice (Mus musculus) present an excellent model for exploring this idea, because social isolation has a well-established influence on their social behavior, and mice engage in communication via multiple sensory modalities. Here, we tested the prediction that social isolation during early life would influence ultrasonic vocalizations (USVs) emitted by adult male mice during same-sex social encounters. Starting at three weeks of age, male mice were housed individually or in social groups of four males for five weeks, after which they were placed in one of three types of paired social encounters. Pair types consisted of: two individually housed males, two socially housed males, or an individually housed and a socially housed male ("mixed" pairs). Vocal behavior (USVs) and non-vocal behaviors were recorded from these 15-minute social interactions. Pairs of mice consisting of at least one individually housed male emitted more and longer USVs, with a greater proportional use of USVs containing frequency jumps and 50-kHz components. Individually housed males in the mixed social pairs exhibited increased levels of mounting behavior towards the socially housed males. Mounting in these pairs was positively correlated with increased number and duration of USVs as well as increased proportional use of spectrally more complex USVs. These findings demonstrate that USVs are part of the suite of social behaviors influenced by early-life social isolation, and suggest that altered vocal communication following isolation reflects reduced social competence.
Competing Interests: The authors have declared that no competing interests exist.
Databáze: MEDLINE
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