Table 2. Linear Mixed Models.

Hormone	No	Ni	Model Parameters	AIC	R2	F	df	p value
Pre-Sampling Cortisol (μg/dL)
Adult Females	48	36	Age	192.85	0.31	1.76	1,7	0.23
			Elapsed Time			10.30	1,7	0.01
			Lactation Status			0.01	1,7	0.91
			Time of Day			0.50	1,7	0.50
			Age*Elapsed Time			3.62	1,7	0.10
Full Model	189	118	Age	652.94	0.18	1.94	1, 66	0.17
			Elapsed Time			8.79	1, 66	0.004
			Sex			0.01	1, 116	0.94
			Time of Day			0.40	1, 66	0.53
			Age*Elapsed Time			0.00	1, 66	0.98
			Sex*Elapsed Time			0.01	1, 66	0.93
Reduced Model	189	118	Elapsed Time	611.21	0.13	28.95	1, 70	<0.0001
Post-Sampling Cortisol (μg/dL)
Full Model	59	52	Age	248.83	0.06	1.87	1, 2	0.30
			Elapsed Time			0.97	1, 2	0.43
			Sex			0.02	1, 50	0.88
			Time of Day			0.06	1, 2	0.83
			Age*Elapsed Time			1.50	1, 2	0.35
			Sex*Elapsed Time			0.12	1, 2	0.76
Pre-Sampling Aldosterone ^
Full Model	162	103	Age	279.68	0.05	0.44	1, 56	0.51
			Elapsed Time			2.62	1, 56	0.11
			Age*Elapsed Time			0.01	1, 56	0.90

Linear mixed model (LMM) results for covariates significantly associated with bottlenose dolphin serum concentrations of cortisol and aldosterone. Parameters in bold were significantly associated with cortisol concentrations (p<0.05). Abbreviations: N_o = number of observations; N_i = number of individuals; F = F statistic; df = numerator, denominator degrees of freedom.

^Log-transformed