Table 3. Results of a general linear model on the effects of number of vascular plant species, island size, and population size of Lygaeus equestris on the percentage of polymorphic loci of L. equestris.

Source of variation	MS	F	p
Number of plant species	10.54	3.16	0.173
Island size	45.94	13.79	0.034
L. equestris population size	20.93	6.28	0.087
Number of plant species * Island size	47.27	14.19	0.033
Number of plant species * L. equestris pop.	24.65	7.40	0.073
Island size * L. equestris pop. size	44.71	13.42	0.035

The analysis included data from the 10 island populations from the Finnish Archipelago (Table 1). The degrees of freedom for all factors are 1 and 3.