Pairwise comparisons showed
that taxon richness was significantly lower at crayfish
sites at 2 m depth (P < 0.01) and nearly so at 0.5 m
(P = 0.06). Overall taxon richness was higher in Saimaa
than in P€aij€anne (F = 9.39, d.f. = 1, P < 0.01), and there
was an interaction between lake and depth (F = 7.44,
d.f. = 2, P < 0.01).