Baseline and stress-induced levels of corticosterone in male and female Afrotropical and European temperate stonechats during breeding

Table 3 CORT concentrations of male stonechats in relation to breeding region and breeding stage

	Post-capture CORT	Stress-induced CORT
	Estimates and 95% credible intervals	Estimates and 95% credible intervals
Intercept: Africa, mating stage	3.7 [3.2, 4.2]	4.2 [3.8, 4.6],
Europe	−0.6 [−1.2, 0.1]	0.5 [0.08, 0.9]
Incubation	−0.8 [−1.4, −0.3]	−0.2 [−0.4, 0.1]
Young	−0.8 [−1.2, −0.3]	−0.1 [−0.4, 0.2]
Europe*incubation	0.5 [−0.2, 1.3]	0.4 [−0.2, 1.0]
Europe*young	1.0 [0.2, 1.7]	0.4 [−0.2, 1.0]
Scaled mass index	−0.09 [−0.2, 0.04]	−0.03 [−0.1, 0.07]
Age yearling	−0.07 [−0.5, 0.3]	−0.1[−0.4, 0.2]
STI duration	0.007 [0.002, 0.01]
Time of day	0.0002 [−0.0002, 0.0007]	0.0001 [−0.0002, 0.0004]
Handling time	0.002 [−0.002, 0.006]

Data shown are estimates and 95% Bayesian credible intervals of natural log-transformed CORT concentrations. Estimates are relative to the intercept as reference level, which here is the mating stage of African males. The left column shows the post-capture and the right column stress-induced CORT, each with the corresponding Bayesian estimate and its’ credible intervals. Estimates of cofactors refer to differences from the intercept estimate. When 0 (zero) is not included in the credible intervals there is an effect of this parameter on the dependent variable (shown in bold). In the case of a significant interaction, the estimated difference of the interaction term is added to the difference of the main effect from the intercept

ISSN: 2730-7182