Table 2.

Summary statistics (β and SE in natural-log scale) for linear models assessing the relationship between waterborne baseline CORT (pg/h) and interrenal CORT (pg/mg) for barred tiger salamanders (n = 23), northern leopard frogs (n = 25) and boreal chorus frogs (n = 18)

Species	Variable	β	SE	t	p	Adj. R2
Tiger salamander	Intercept	8.15	0.16	50.59	<0.001	0.289
	Interrenal CORT	0.07	0.04	1.73	0.100
	Mass	0.20	0.08	2.53	0.020
Leopard frog	Intercept	7.62	0.26	29.55	<0.001	0.268
	Interrenal CORT	0.11	0.11	1.02	0.321
	Mass	0.32	0.10	3.28	0.003
Chorus frog	Intercept	7.69	0.15	52.06	< 0.001	0.361
	Interrenal CORT	−0.23	0.10	−2.25	0.040
	Mass	0.24	0.18	1.34	0.202

Mass was included as a covariate to account for differences in baseline CORT release rates based on size. Interrenal and baseline CORT and mass were natural-log-transformed.

SE indicates standard error.