Dietary variation and food selection by mayfly grazers in a subtropical mountain stream

Zoological Studies

Table 4 Pair-wise tests of the effects of season and treatment

Groups	t	p(perm)	p(MC)
Groups within level ‘wet season’
Rhithrogena vs. Baetis	1.086	0.3071	0.2986
Rhithrogena vs. control	1.246	0.1740	0.1936
Baetis vs. control	1.473	0.0911	0.1083
Groups within level ‘dry season’
Rhithrogena vs. Baetis	1.960	0.0246	0.0307
Rhithrogena vs. control	4.263	0.0001	0.0001
Baetis vs. control	3.663	0.0008	0.0001
Groups within level ‘treatment’
Dry vs. wet (Rhithrogena)	2.070	0.0006	0.0066
Dry vs. wet (Baetis)	1.401	0.1323	0.1509
Dry vs. wet (control)	2.589	0.0005	0.0005

Pair-wise tests of the effects of season and treatment (mayfly taxon or insect-exclusion) on the algal communities on the insect-excluded bricks (control) and in the gut contents of the two mayflies (Baetis and Rhithrogena). p (perm), possible permutations. p (MC), Monte Carlo p values. Statistically significant p values (<0.05) are highlighted in bold font.