Figure 5. Intensity of red of the pelvic spines of sticklebacks from Lake Pallvann.

Box-Whisker plot showing median intensity of red (I_R) of the pelvic spine of female and male three-spined sticklebacks from Lake Pallvann in northern Norway (Table 1 and Fig. 1). The fish were caught during the spawning season (“Spring”) and 3–4 months after the end of spawning (“Autumn”). The “Spring” and “Autumn” samples refer to “No 9s” and “No 9a” in Table 1, respectively.