Table 1.

Effects of sex and body mass on antibody levels at 14, 28 and 35 dpi.

Response term	Explanatory term	Estimate ± SE	t statistics	p value
Antibodies at 14 dpi	Sex	0.05 ± 0.04	t2,96 = 1.3	0.19
	Initial body mass	0.02 ± 0.015	t2,96 = 1.4	0.16
Antibodies at 28 dpi	Sex	0.06 ± 0.02	t2,97 = 2.7	0.008*
	Initial body mass	− 0.004 ± 0.009	t2,97 = − 0.5	0.64
Antibodies at 35 dpi	Sex	0.04 ± 0.02	t2,97 = 2.5	0.014*
	Initial body mass	− 0.009 ± 0.007	t2,97 = − 1.2	0.23

We ran linear models with antibody levels at 14 dpi or sqrt(antibody levels at 28 or 35 dpi) as the response term and with sex and body mass at the start of the experiment as explanatory terms.