Figure 4: Changes in CYP19A transcript levels as an indicator of E2 level. A) Bars represent means +1S.E. of aromatase CYP19A transcript levels of female tomcod for control (DMSO) group. Spawning stages and sample size (N) are shown x-axis below the graph. B) Changes in plasma E2 and testosterone values for female winter flounder. Values are mean ± SEM; (PREP 1 initial rapid phase of gonadal growth; PREP 2 continuing phase of slower growth of gonads; PRES pre-spawning phase; SPW spawning; POST post spawned interval) (Figure 4B Modified from (Harmin et al., 1995).