FIGURE 11.

Attraction of Taar2-9^−/− and wild type (WT) male mice to objects and familiar and unfamiliar conspecifics. Mean (±SEM) periods of time 10–14 focal male mice spent (A) in each of three empty chambers after 10 min habituation in the central arena; (B) in the three chambers when a novel object (Left) and an unfamiliar male mouse (Right, male 1) were placed into the polycarbonate wire enclosure, and the time they spent sniffing the object and the male, respectively; (C) in the three chambers when, after 10 min, the object was replaced by a male mouse (Left, male 2), and the time spent sniffing the two males; (D) in the three chambers when male 1 was replaced by a female mouse (Right), and the time spent sniffing the male and the female, respectively. There is no significant difference between WT and Taar2-9^−/− mice in the recognition and interaction of female mice. ^∗P < 0.01 for the comparison between genotypes; differences were tested using two-way ANOVA followed by Bonferroni’s post hoc tests.