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. 2009 Jul 23;49(4):365–379. doi: 10.1093/icb/icp057

Fig. 3.

Fig. 3

Individual covariation between testosterone and associated traits in male slate-colored (Carolina) juncos from VA. Testosterone in response to a GnRH challenge co-varied positively with tail white (A; McGlothlin et al. 2008) (© 2007 European Society of Evolutionary Biology), negatively with complement immune activity (B; Grieves et al. 2006) (© 2006 British Ecological Society), positively with aggressive behavior (C; McGlothlin et al. 2007) (© 2007 by the University of Chicago) and negatively with parental behavior (D; McGlothlin et al. 2007) (© 2007 by The University of Chicago).