Partial Replacement of Fishmeal with Duckweed (Spirodela polyrhiza) in Feed for Two Carnivorous Fish Species, Eurasian Perch (Perca fluviatilis) and Rainbow Trout (Oncorhynchus mykiss)
Table 6
Essential amino acids in the different rainbow trout diets (% DM).
Control
DWD12
DWD24
DWD35
DWF12
DWF24
DWF35
Req
Arginine
2.10
2.24
2.17
2.13
1.88
1.89
1.73
1.5
Histidine
1.03
1.06
0.98
1.01
0.97
0.99
0.89
0.8
Leucine
3.33
3.41
3.18
3.25
3.08
3.19
2.96
1.5
Isoleucine
1.82
1.87
1.83
1.81
1.64
1.69
1.52
1.1
Lysine
1.99
2.27
1.90
1.76
1.86
1.85
1.46
2.4
Methionine
0.80
0.78
0.74
0.70
0.61
0.64
0.57
0.7
Phenylalanine + tyrosine
3.31
3.47
3.37
3.23
2.88
3.10
2.83
1.8
Threonine
1.43
1.47
1.37
1.41
1.21
1.27
1.13
1.1
Valine
2.16
2.23
2.17
2.17
1.97
2.03
1.89
1.2
Sum
17.97
18.8
17.71
17.47
16.1
16.65
14.98
Bold numbers indicate values below the required level according to the National Research Council [23] (rightmost column).
