Table 2.

Post hoc summary of pairwise differences (Table 3) in PC1 (decreasing haptoglobin concentration and increasing haemolysis titre), PC2 (increasing ovotransferrin concentration and haemagglutination titre) and PC3 (nitric oxide concentration) between fruit‐ and invertebrate‐ fed subsets of common bulbuls Pycnonotus barbatus within week 0, 12 and 24. A subset of each treatment was switched to alternative diet treatment at week 12, resulting in four treatment groups: FI‐fruit to invertebrate, IF‐invertebrate to fruit, FF‐ fruit throughout and II‐invertebrate throughout. PC3 did not differ between treatments in weeks 0 and 12, hence no post hoc test was done

Week	Difference		PC1				PC2				PC3
			Haptoglobin and haemolysis				Ovotransferrin and Haemagglutination				Nitric oxide
	Diet	Diet	Est.	Error	t	p	Est.	Error	t	p	Est.	Error	t	p
Week 0 & 12
0	I	F	−0.49	0.31	−1.59	.12	−0.59	0.31	−1.90	.06
12	I	F	−0.96	0.32	−3.06	<.01**	−1.18	0.32	−3.69	<.01***
Week 24
24	II	FI	−0.07	0.50	−0.13	1.00	−0.25	0.47	−0.53	.95	0.09	0.76	0.11	1.00
24	II	FF	−0.89	0.46	−1.92	.23	−0.53	0.43	−1.23	.61	−1.16	0.71	−1.64	.35
24	II	IF	−1.10	0.44	−2.52	.07	0.10	0.41	0.25	.99	−1.74	0.68	−2.56	.05
24	FI	FF	−0.82	0.49	−1.69	.34	−0.28	0.45	−0.62	.92	−1.25	0.77	−1.62	.37
24	FI	IF	−1.04	0.46	−2.24	.13	0.35	0.43	0.82	.85	−1.83	0.76	−2.42	.07
24	FF	IF	−0.21	0.42	−0.51	.96	0.64	0.39	1.64	.35	−0.58	0.62	−0.93	.79

Statistically significant effects are highlighted bold.

**p < .01, ***p < .001.