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. Author manuscript; available in PMC: 2009 Mar 5.
Published in final edited form as: Behav Brain Res. 2007 Oct 7;187(2):371–378. doi: 10.1016/j.bbr.2007.09.034

Figure 3.

Figure 3

Ultrasonic vocalizations (USVs) in Avpr1b pups. A) Number and B) Duration of vocalizations on postnatal day (pnd) 3, 6, 9 and 12 in response to social separation during a five minute session. No consistent genotype differences were detected across the four ages tested. C) Number and D) Duration of USVs emitted on pnd 9 during the maternal potentiation test by pups during the second five min separation session, following a five min reunion. Before: first period of five min isolation from the mother and siblings. After: second period of isolation, following five min of reunion with the mother and entire litter. Avpr1b +/+ mice emitted more calls (*p< .05) during the second separation after reunion, displaying the expected maternal potentiation. Avpr1b +/− and Avpr1b −/− mice failed to show an effect of the reunion with their mother and siblings on number of calls emitted during the second separation. Data are expressed as mean ± SEM of calls. Avpr1b +/+ (n = 9); Avpr1b +/− (n = 31); Avpr1b −/− (n = 17).