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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)

From: Microbial taxa in dust and excreta associated with the productive performance of commercial meat chicken flocks

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

  1. PERMDISP, permutational analyses of multivariate dispersions
  2. *Dust samples collected on day 7 from company B were excluded due to the small sample
  3. Values in bold indicate statistical significance (p < 0.05)