Table 2.

Variation in the bacterial community structure between high and low-performing farms of company A and B across the production cycle (7, 14, 21, 28 and 35) in excreta and dust samples using permutational multivariate analysis of variance (PERMANOVA)

Sample type	Company	Chicken Age (days)	PERMANOVA			PERMDISP
			Pseudo-F	R2	P value	P value
Excreta	A	All ages	6.84	0.05	0.001	0.33
		7	6.03	0.20	0.001	0.90
		14	3.49	0.13	0.003	0.87
		21	2.83	0.11	0.004	0.65
		28	3.16	0.12	0.001	0.16
		35	2.17	0.13	0.007	0.81
	B	All ages	3.39	0.02	0.003	0.97
		7	1.43	0.05	0.10	0.62
		14	4.67	0.18	0.001	0.14
		21	2.01	0.08	0.03	0.19
		28	2.77	0.10	0.001	0.36
		35	1.40	0.04	0.10	0.77
Dust	A	All ages	5.54	0.08	0.001	0.02
		7	2.65	0.25	0.08	0.75
		14	2.83	0.18	0.001	0.61
		21	2.78	0.17	0.002	0.07
		28	1.97	0.12	0.04	0.004
		35	2.47	0.22	0.007	0.005
	B	All ages*	2.97	0.05	0.01	0.48
		14	1.78	0.14	0.11	0.02
		21	1.66	0.11	0.07	0.21
		28	3.22	0.24	0.009	0.003
		35	2.11	0.13	0.02	0.08

PERMDISP, permutational analyses of multivariate dispersions

*Dust samples collected on day 7 from company B were excluded due to the small sample

Values in bold indicate statistical significance (p < 0.05)