Table 1.

Hormone concentrations (ng ml⁻¹) following territorial challenges (concentrations refer to back-transformed mean concentrations in ng ml⁻¹ (lower s.e.m.; upper s.e.m.)) of testosterone and 5α-dihydrotestosterone (DHT) of 7 females challenged with a STI, 17 unchallenged territorial females and 4 non-territorial female black coucals. (For corticosterone, we considered only those individuals for which a blood sample was obtained within 3 min after capture (7 STI and 11 control females). 17β-Oestradiol concentrations were non-detectable.)

hormone	STI-females	unchallenged females	non-territorial females	statistics
testosterone	0.23 (0.17; 0.30)	0.18 (0.13; 0.23)	0.23 (0.12; 0.44)	F2,25=0.19; p>0.8
DHT	0.08 (0.07; 0.09)	0.09 (0.08; 0.10)	0.11 (0.09; 0.14)	F2,25=0.75; p>0.4
corticosterone	13.4 (10.3; 17.6)	13.8 (11.6; 16.6)		t13.9=0.5; p>0.6