Exposure to 2 × 10−10
m 17,20β-P for 4 h increased AR and cGnRH-II mRNA concentrations in the cerebellum of female (F) but not in male (M) goldfish. Exposure to vehicle (318 μl/L ethanol; control), 10−6
m
l-serine (Ser), or 2 × 10−10
m PGF2α had no effect on AR or cGnRH-II mRNA levels. The number inside or above each bar represents sample size n for the corresponding group. The asterisk denotes significant difference between control and the treatment group (p < 0.05). Error bars indicate SEM. F, Female; M, male.