Table 1.

Pairwise comparisons of the effects of treatment on the total number of bites (Tukey's HSD; n = 15 fish).

treatment pair	estimate	s.e.	z-value	p
NoRED versus ND25	−1.0651	0.3982	−2.675	0.037
NoRED versus ND50	−1.2736	0.3938	−3.234	0.006
NoRED versus NoFILTER	−1.7458	0.3880	−4.500	<0.001
ND25 versus ND50	−0.2085	0.3548	−0.588	0.935
NoFILTER versus ND50	0.4722	0.3404	1.387	0.506
NoFILTER versus ND25	0.6807	0.3477	1.958	0.203