Ingredients (%)

Diets

T0

T15

T30

T60

Fish meal (FM)

50

42.5

35

20

Soybean protein concentrate (SPC)

0

7.7

15.4

30.8

Fermented soybean meal

10

10

10

10

Brewers' yeast

5

5

5

5

Blood meal

2

2

2

2

Corn oil

1.0

1.3

1.6

2.2

α-starch

23

23

23

23

Zeolite

2.3

1.8

1.3

0.3

Vitamin mixture²

2

2

2

2

Mineral mixture³

2

2

2

2

Betaine

0.2

0.2

0.2

0.2

NaH₂PO₄

2.5

2.5

2.5

2.5

Total

100

100

100

100

Nutrient composition

Crude protein

41.9

42.5

41.8

42.8

Met

0.99

0.88

0.80

0.56

Arg

2.73

2.73

2.77

2.85

Lys

2.60

2.57

2.56

2.50

His

0.84

0.88

0.90

0.92

Leu

3.02

3.04

3.10

3.18

Ile

1.66

1.69

1.74

1.76

Phe

1.39

1.45

1.55

1.68

Val

1.86

1.90

1.94

1.98

Thr

1.63

1.61

1.63

1.64

Crude lipid

5.8

5.7

5.9

5.9

Crude ash

10.8

11.1

10.9

11.2

Gross energy (kJ∙g⁻¹ diet)

13.11

13.08

13.04

13.12