Table 4 Mean of relative abundance (%) ± SD of the most prevalent phyla, classes, orders, families, and genera found in feeds

 Firmicutes

64.20 ± 4.37

67.48 ± 3.14

0.271

 Proteobacteria

34.54 ± 4.27

31.85 ± 3.15

0.351

 Bacilli

63.39 ± 4.30

66.79 ± 3.24

0.254

 Alphaproteobacteria

27.90 ± 3.66

30.96 ± 3.18

0.251

 Gammaproteobacteria

6.30 ± 0.71

0.65 ± 0.12

0.030

 Lactobacillales

86.77 ± 1.65

95.73 ± 0.28

<0.001

 Vibrionales

7.50 ± 1.18

0.17 ± 0.29

0.030

 Clostridiales

1.12 ± 0.20

0.99 ± 0.72

0.483

 Bacillales

1.02 ± 0.01

0.98 ± 0.28

0.691

 Lactobacillaceae

52.33 ± 2.97

60.95 ± 2.91

0.006

 Streptococcaceae

17.95 ± 1.59

20.52 ± 4.35

0.470

 Leuconostocaceae

16.25 ± 0.52

13.88 ± 1.88

0.055

 Vibrionaceae

7.50 ± 1.18

0.17 ± 0.08

0.030

 Clostridiaceae

0.99 ± 0.18

0.90 ± 0.26

0.553

 Fusobacteriaceae

0.70 ± 0.21

0.01 ± 0.03

0.026

 Staphylococcaceae

0.51 ± 0.06

0.39 ± 0.07

0.038

 Lactobacillus

52.22 ± 3.01

60.85 ± 2.89

0.006

 Streptococcus

17.78 ± 1.60

20.24 ± 4.36

0.665

 Photobacterium

7.44 ± 1.13

0.17 ± 0.08

0.030

 Thermoanaerobacterium

0.70 ± 0.16

0.68 ± 0.19

0.885

 Staphylococcus

0.51 ± 0.06

0.39 ± 0.07

0.038

 Acinetobacter

0.15 ± 0.06

0.09 ± 0.07

0.312