Fig. 5. Effect of 12-week exposure to long-day photoperiod (LD) on hypothalamic
neuropeptide and receptor gene expression in male and female bank voles. Data
for short-day photoperiod (SD) females and LD individuals are expressed as a
percent of the level in SD males, and presented as means ±
S.E.M. The effect of photoperiod and sex on gene expression was
tested by two-way ANOVA. *Significant difference
(P<0.05);
difference approached significance at
P=0.06. See Fig. 4 for
abbreviations.