Figure 5: Effect of PCB (Figure A and B), and PAH (Figure C and D) alone on aromatase CYP19A transcript levels.Bars represent means ± 1S.E. of aromatase CYP19A transcript levels of female tomcod. Spawning stages and sample sizes are shown below x-axis. Well-developed and large ovaries at spawning stage showed the highest copy number compared to mature and spent developmental stages at all experimental groups.