Effects of Dietary Fish Meal Replacement with Composite Mixture of Chicken Meal, Krill Meal, and Plant Proteins on Growth, Physiological Metabolism, and Intestinal Microbiota of Chinese Perch (Siniperca chuatsi)

Table 2

Amino acid composition of the ingredients and experimental diets (%, dry matter basis).

Amino acid contents	Ingredients					Diets
	Fish meal	Chicken meal	Krill meal	Fermented soybean meal	Soy protein concentrate	Control (D1)	27.27% (D2)	54.55% (D3)
Essential amino acid
Arginine	4.05	4.00	4.46	3.26	4.98	2.69	2.61	2.66
Histidine	2.15	2.22	1.49	1.42	1.81	1.43	1.40	1.35
Valine	3.60	2.45	3.69	2.35	3.40	1.98	1.87	1.95
Phenylalanine	2.40	3.21	3.68	2.50	3.40	1.98	1.94	1.95
Leucine	5.48	6.27	5.50	3.91	5.17	3.47	3.30	3.32
Isoleucine	3.93	2.46	3.58	2.29	4.23	1.53	1.42	1.65
Threonine	3.17	2.52	3.15	1.96	2.73	2.07	1.98	1.90
Methionine	2.25	1.29	2.13	0.78	0.92	1.29	1.22	1.09
Lysine	5.65	4.95	5.00	2.79	4.23	3.07	2.76	2.85
Nonessential amino acid
Aspartic	6.29	4.11	5.63	5.77	7.76	4.54	4.37	4.15
Serine	2.50	2.22	2.60	2.50	3.50	2.51	2.54	2.54
Glutamic	9.75	6.62	6.94	9.42	12.09	7.49	7.47	7.36
Alanine	4.30	4.23	2.94	2.41	2.74	2.78	2.60	2.44
Glycine	4.30	7.06	2.55	2.13	2.74	4.26	3.83	3.75
Tyrosine	2.44	2.34	3.34	1.68	2.34	1.59	1.56	1.52
Proline	2.92	6.21	4.00	2.51	2.68	1.78	1.76	1.64
Cystine	0.61	0.61	1.28	0.76	0.98	1.18	1.12	0.97