Figure 3

Measured concentrations of testosterone, androstenedione, progesterone, and cortisol (ng/g wet weight) in humpback whale samples. Samples are clustered by season (“Northward Migration”, A or “Southward Migration”, B) and steroid hormone profile characteristics. Northward migration samples are classified as “High androstenedione” (androstenedione > 7.8 ng/g), “Medium androstenedione” (0.87 ng/g < androstenedione < 7.8 ng/g) and “Low steroids” (androstenedione < 0.87 ng/g). Southward migration samples are classified as “High progesterone” (progesterone > 4.0 ng/g), “Medium androstenedione” (0.87 ng/g < androstenedione < 7.8 ng/g) and “Low steroids” (androstenedione < 0.87 ng/g). The boxplot centre represents the median value of each hormone, while the lower and upper hinges extend to the first and third quantiles, respectively.