Fig. 4

Mean (± 95% Confidence interval) monthly serum testosterone (red triangles) and body weight (black circles) in the male Pacific walrus (n = 11). Months that were significantly (p < 0.05) different within each analysis are highlight with bars. The black horizontal bars on top of the graph represent months during which weights were significantly different from each other, while the pink and grey bars along the x -axis represent months whereby testosterone concentrations are significantly different