Impact of Overwintering Hoard on the Edible Tissues, Muscle Quality, Hepatopancreas Color, and Proximate Biochemical and Amino Acid Compositions of Male Eriocheir sinensis

Table 2

Comparisons on amino acid composition of male Eriocheir sinensis before and after hoarding in winter (dry weight, mg/g).

Amino acid	Corn	Hepatopancreas (n = 4)		Gonad (n = 4)		Muscle (n = 4)
		Before hoarding	After hoarding	Before hoarding	After hoarding	Before hoarding	After hoarding
Threonine	2.70	3.66 ± 0.94	3.33 ± 0.31	15.06 ± 1.29	13.14 ± 2.56	7.70 ± 0.36^a	6.51 ± 0.51^b
Cysteine	0.90	1.20 ± 0.31	1.01 ± 0.05	3.88 ± 0.53	2.93 ± 1.07	1.68 ± 0.10	1.47 ± 0.18
Valine	3.35	3.91 ± 0.91	3.67 ± 0.30	6.04 ± 0.61	5.45 ± 0.26	7.45 ± 0.82	6.34 ± 0.50
Methionine	1.50	1.11 ± 0.44	0.87 ± 0.29	0.83 ± 0.23	1.10 ± 0.24	3.46 ± 0.55	3.09 ± 0.38
Isoleucine	2.63	3.11 ± 0.74	2.98 ± 0.26	7.89 ± 0.64	6.32 ± 1.59	7.35 ± 1.06	6.25 ± 0.43
Leucine	10.16	5.70 ± 1.33	5.33 ± 0.49	12.4 ± 0.81	10.48 ± 2.13	13.9 ± 1.03^a	11.86 ± 0.83^b
Tyrosine	2.66	3.10 ± 0.65	2.63 ± 0.18	5.58 ± 0.63	4.56 ± 1.05	6.44 ± 0.32	5.66 ± 0.49
Phenylalanine	4.01	3.57 ± 0.82	3.37 ± 0.27	7.31 ± 0.51	5.90 ± 1.46	7.84 ± 0.57^a	6.59 ± 0.49^b
Lysine	2.23	4.58 ± 1.11	4.41 ± 0.57	8.28 ± 0.77	8.20 ± 0.71	15.19 ± 1.39	13.13 ± 0.95
ΣEAA	30.15	29.93 ± 7.10	27.59 ± 2.50	67.28 ± 4.67	58.09 ± 10.25	71.01 ± 5.44	60.91 ± 4.41
Aspartic acid	6.54	5.26 ± 1.66	4.57 ± 0.45	20.69 ± 3.11	20.33 ± 3.45	17.18 ± 1.18	14.77 ± 1.30
Serine	3.26	2.99 ± 0.80	2.50 ± 0.34	8.98 ± 0.59	8.07 ± 1.40	7.47 ± 0.29^a	6.48 ± 0.50^b
Glutamic acid	14.20	7.28 ± 2.22	6.19 ± 0.66	23.48 ± 2.19	22.51 ± 2.26	30.32 ± 2.81^a	25.87 ± 1.54^b
Glycine	2.63	4.38 ± 1.55	3.53 ± 0.41	7.04 ± 0.61	5.81 ± 1.01	13.42 ± 0.52^a	10.13 ± 0.42^b
Alanine	6.39	6.27 ± 1.25	5.01 ± 0.63	13.38 ± 1.27	11.72 ± 2.26	17.62 ± 0.72^a	14.11 ± 1.29^b
Histidine	2.82	2.58 ± 0.77	2.27 ± 0.19	13.46 ± 1.61	14.05 ± 1.75	5.18 ± 0.27^a	4.27 ± 0.39^b
Arginine	3.05	5.35 ± 1.69	4.48 ± 0.53	7.81 ± 1.06	6.72 ± 0.42	16.97 ± 0.82^a	15.57 ± 1.39^b
Proline	6.02	4.29 ± 0.98	2.86 ± 0.31	24.77 ± 2.11	20.37 ± 6.98	6.28 ± 0.64	4.91 ± 0.67
ΣNEAA	44.92	38.42 ± 10.28	31.40 ± 3.13	119.60 ± 8.48	109.57 ± 18.56	114.44 ± 4.71^a	96.13 ± 6.79^b
Aspartic acid	6.54	5.26 ± 1.66	4.57 ± 0.45	20.69 ± 3.11	20.33 ± 3.45	17.18 ± 1.18	14.77 ± 1.30
Glutamic acid	14.20	7.28 ± 2.22	6.19 ± 0.66	23.48 ± 2.19	22.51 ± 2.26	30.32 ± 2.81^a	25.87 ± 1.54^b
Alanine	6.39	6.27 ± 1.25	5.01 ± 0.63	13.38 ± 1.27	11.72 ± 2.26	17.62 ± 0.72^a	14.11 ± 1.29^b
Tyrosine	2.66	3.10 ± 0.65	2.63 ± 0.18	5.58 ± 0.63	4.56 ± 1.05	6.44 ± 0.32	5.66 ± 0.49
Phenylalanine	4.01	3.57 ± 0.82	3.37 ± 0.27	7.31 ± 0.51	5.90 ± 1.46	7.84 ± 0.57^a	6.59 ± 0.49^b
Lysine	2.23	4.58 ± 1.11	4.41 ± 0.57	8.28 ± 0.77	8.20 ± 0.71	15.19 ± 1.39	13.13 ± 0.95
ΣDAA	36.04	30.06 ± 7.55	26.17 ± 2.60	78.72 ± 6.70	73.22 ± 10.32	94.60 ± 6.47^a	80.15 ± 5.71^b

Note. Different letters within the same row indicate significant differences between the same tissues (). ΣEAA, total essential amino acids containing threonine, cysteine, valine, methionine, isoleucine, leucine, tyrosine, phenylalanine, and lysine; ΣNEAA, total nonessential amino acids; ΣDAA, total delicious amino acids containing aspartic acid, glutamic acid, alanine, tyrosine, phenylalanine, and lysine.