Table 1.

Analysis of covariance testing the effects on the female fecundity (number of eggs) of the infection by microsporidia Dictyocoela sp. and the infection by Acanthocephala P. laevis, with the female size as covariate. Both size and egg number data were Box–Cox transformed prior to analysis to meet normality assumptions.

source	d.f.	sum of squares	F-ratio	p
size	1	1492.71	19.58	<0.0001
microsporidia	1	21.21	0.28	0.60
Acanthocephala	1	81.98	1.08	0.30
size×microsporidia	1	7.61	0.10	0.75
size×Acanthocephala	1	421.61	5.53	0.02
microsporidia× Acanthocephala	1	119.00	1.56	0.22
error	59	4497.05

Whole model: F_6,65=6.14; p<0.0001.