Fig. 5From: Effects of the social environment during adolescence on the development of social behaviour, hormones and morphology in male zebra finches (Taeniopygia guttata)Testosterone levels during adolescence. Juvenile group males had a pronounced peak in testosterone (T) in late adolescence, which was missing in males from mixed-age groups. For details, see text. Shown are means ± SE for each age and lines from the model with the best fit. Sample sizes are shown directly above the x-axisBack to article page