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. 2015 Dec 10;9:316. doi: 10.3389/fnbeh.2015.00316

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Copyright © 2015 Mun, Lipina and Roder.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Ultrasonic vocalizations (USVs) in adult male mice. Box and whisker plots represent (A) total number of USVs, (B) number of high frequency calls (>35 kHz), and (C) number of low frequency calls (20–35 kHz) were displayed. For the acoustic features, (D) mean peak frequency, (E) call duration, and (F) distribution of calls with frequency and call durations were shown peak in each environments, including ND, novel dim; NB, novel bright; FD, familiar dim; FB, familiar bright; and water. ^*P < 0.05, ^***P < 0.001 (Bonferroni post-hoc analysis; Two-way ANOVA).