Figure 4.

A–C, Effects of treatments on serum concentrations of testosterone (A) and on two peripheral measures of T action, the cloacal protuberance (CP) width (B) and the syrinx mass (C). Bars represent the mean ± SEM. The same letter above individual groups indicates the absence of statistical differences, and different letters above bars indicate a significant difference. PER-T, n = 7; HVC-POM T, n = 7; POM-T, n = 8; HVC-T, n = 5; HVC-POM NO T, n = 4. Differences were considered significant at p ≤ 0.05.