Table 2. Results of LMM for the relationships of parasitosis (prevalence and variance-to-mean ratio of parasite burden) with bird abundance and molecrab body size.

Estimate effects, their standard errors (S.E.), degrees of freedom (D.F.), and t statistics are provided for each fixed effect term. Degrees of freedom were estimated through Satterthwaite approximation. R²m and R²c are the marginal and critical pseudo-R², which represent the variability accounted for fixed and the entire model, respectively.

	Term	Estimate	S.E.	D.F.	t-value	P-value	R2m	R2c
Prevalence	Intercept	0.3871	0.0624	4.54	6.203	0.002	0.538	0.757
	Bird density	0.0002	0.0001	53.36	2.150	0.036
	Effect of large molecrabs	0.4120	0.0416	29.39	9.913	<0.001
	Interaction	−0.0002	0.0001	28.93	−1.896	0.068
Variance-to-mean	Intercept	0.1843	0.0538	18.32	3.4287	0.0029	0.138	0.154
ratio (log10)	Bird density	−0.0001	0.0002	58.32	−0.7427	0.4607
	Effect of large molecrabs	0.0726	0.0719	56.04	1.0096	0.3170
	Interaction	0.0004	0.0002	55.98	1.5970	0.1159