Table 3 Relative abundance of the most dominant classes, orders, and families present in the digesta samples of sea trouts fed with the three experimental diets: control diet (CON), mealworm diet (MW), and superworm diet (SW)

Classes

 Actinobacteria

7.99

9.12

10.32

1.71

0.6415

 Alphaproteobacteria

2.05

3.37

0.41

0.81

0.0826

 Bacilli

41.57^a

50.27^ab

65.69^b

5.47

0.0350

 Clostridia

32.92^b

26.77^b

13.53^a

2.75

0.0022

 Gammaproteobacteria

5.43

2.97

7.43

3.74

0.7054

 Nostocophycideae

8.24^b

6.24^b

1.80^a

1.07

0.0060

 40 classes^*

1.79^c

1.26^b

0.78^a

0.10

0.0003

Order

 Actinobacteria

7.99

9.12

10.32

1.71

0.6415

 Alphaproteobacteria

2.05

3.37

0.41

0.81

0.0826

 Bacilli

41.57^a

50.27^ab

65.69^b

5.47

0.0350

 Clostridia

32.92^b

26.77^b

13.53^a

2.75

0.0022

 Gammaproteobacteria

5.43

2.97

7.43

3.74

0.7054

 Nostocophycideae

8.24^b

6.24^b

1.80^a

1.07

0.0060

 87 orders^*

1.79^c

1.26^b

0.78^a

0.10

0.0003

Families

 Bacillaceae

3.05^b

2.00^a

1.74^a

0.25

0.0106

 Clostridiaceae

27.70^b

23.39^b

11.22^a

2.74

0.0056

 Corynebacteriaceae

0.58^a

1.85^b

2.58^c

0.13

0.0001

 Enterobacteriaceae

5.26

2.77

7.31

3.73

0.6993

 Enterococcaceae

8.02^a

25.84^b

17.07^ab

4.10

0.0395

 Lachnospiraceae

1.87^b

1.00^ab

0.71^a

0.28

0.0391

 Lactobacillaceae

12.76^a

8.52^a

24.62^b

1.90

0.0006

 Leuconostocaceae

3.09^a

2.63^a

7.55^b

0.74

0.0020

 Microbacteriaceae

0.25

1.46

1.05

0.47

0.2370

 Micrococcaceae

4.10

3.09

2.75

0.47

0.1608

 Nocardioidaceae

1.13

1.82

2.21

1.07

0.7790

 Peptostreptococcaceae

1.61

1.29

0.87

0.22

0.1073

 Rickettsiaceae

1.30^b

0.68^a

0.20^a

0.12

0.0005

 Rivulariaceae

8.10^b

6.16^b

1.77^a

1.05

0.0060

 Ruminococcaceae

1.11

0.64

0.42

0.21

0.1072

 Streptococcaceae

10.70

7.23

11.07

0.99

0.0431

 203 families^*

9.27

9.52

6.80

0.96

0.1435