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. 2012 Dec 17;7(12):e51482. doi: 10.1371/journal.pone.0051482

Figure 1. Relative expression of parvalbumin (PV) mRNA in the manakin testosterone (T) treatment study, zebra finch flutamide treatment study, and species comparison study.

Figure 1

(A) Manakin T treatment study; white-bars represent male manakins treated with T-filled implants, and black bars represent male manakins treated with blank implants (Control). (B) Zebra finch flutamide study; white bars represent male zebra finches treated with T-filled implants and blank implants (T+Blank), and black bars represent male zebra finches treated with T-filled implants and flutamide-filled implants (T+Flutamide). PV expression in the PEC was virtually nonexistent compared to the other muscles and therefore is not clearly depicted on the graph. (C) Species comparison of reproductively active male birds. White bars represent golden-collared manakins, grey bars represent ochre-bellied flycatchers, and black bars represent zebra finches. Wing muscles are displayed on the horizontal axis in all graphs (supracoracoideus = SC; scapulohumeralis caudalis = SH; and pectoralis = PEC). Asterisks (*) displayed within each graph’s legend indicate significant differences between hormone manipulated groups (A & B) and among species (C). Data represent means ±1 SEM.