Table 1.

Plant and insect parameters affecting fluid retention

(A) Explanatory variables (Dependent variable = insect retention (0/1))
	ndf	ddf	F	P
Mixture: estimated covariance = 4·09×10–18				n.s.
FluidOrigin	4	130	50·46	<0·0001
FluidAge(FluidOrigin)	8	130	13·26	<0·0001
InsectType	1	130	108·74	<0·0001
InsectSpecies(InsectType)	2	1294	21·69	<0·0001

(B) Parameter estimates (least square means)
	z Value	P	Estimate	s.e.
N. ampullaria vs. Water	0·11	0·9130	0·06117	0·5600
N. ampullaria vs. N. hemsleyana	12·25	<0·0001	9·1181	0·7443
N. ampullaria vs. N. gracilis	4·44	<0·0001	2·0674	0·4658
N. ampullaria vs. N. rafflesiana	12·81	<0·0001	11·3268	0·8843
Water vs. N. hemsleyana	12·52	<0·0001	9·0569	0·7237
Water vs. N. gracilis	4·67	<0·0001	2·0062	0·4296
Water vs. N. rafflesiana	12·99	<0·0001	11·2657	0·8670
N. hemsleyana vs. N. gracilis	–11·23	<0·0001	–7·0507	0·6277
N. hemsleyana vs. N. rafflesiana	4·56	<0·0001	2·2087	0·4840
N. gracilis vs. N. rafflesiana	11·74	<0·0001	9·2595	0·7886

(A) Results of a mixed nested logistic regression model testing for the random effect of mixture and the fixed effects of fluid origin (four Nepenthes species and water control), fluid age (young, medium, old), type of insect (fly, ant) and insect species on insect retention rates.

(B) Results of pairwise comparisons of the associated least squares means testing differences in the retention rates between fluids of each species or water.