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. Author manuscript; available in PMC: 2009 Nov 9.
Published in final edited form as: J Comp Physiol B. 2008 Jul 2;178(8):997–1005. doi: 10.1007/s00360-008-0290-8

Figure 1.

Figure 1

(a) Circulating concentrations of corticosterone in tree lizards (Urosaurus ornatus) before and after handling stress at the urban (U), semi-natural (SN), and natural (N) sites. Upper case letters denote significant differences of baseline levels and lower case letters denote significant differences of stress-induced levels of corticosterone among the different sites (α = 0.05 level). Additionally, stress-induced CORT concentrations were significantly greater relative to baseline CORT concentrations for all sites (α = 0.05 level). (b) The magnitude of the change in corticosterone, at three sites sampled across the urban-rural gradient of Phoenix, Arizona. (Note: a similar result was found using percentage increase above baseline). Error bars represent 1 standard error.