. 2024 Jun 30;14(6):1403–1416. doi: 10.5455/OVJ.2024.v14.i6.8

Table 2. Amino acids composition of the examined fish samples (mg/g dry weight).

Amino acids	Fish spp.
Amino acids	Nile tilapia	Nile perch	Zander	Catfish	Elephant-snout
Essential amino acids	61.97 ± 2.15^a	86.06 ± 2.82^a	41.30 ± 1.37^b	28.79 ± 1.65^b	17.83 ± 1.22^c
Lysine	3.87 ± 0.38^b	10.20 ± 2.45^a	8.44 ± 1.42^a	6.79 ± 2.06^a	2.84 ± 0.01^b
Histidine	5.55 ± 1.03^a	7.78 ± 2.09^a	5.48 ± 0.35^a	1.62 ± 0.04^b	1.51 ± 0.01^b
Leucine	16.89 ± 1.33^a	20.91 ± 1.12^a	7.53 ± 1.72^b	5.68 ± 1.74^b	3.67 ± 1.27^c
Isoleucine	3.11 ± 0.68^a	3.97 ± 0.84^a	4.36 ± 1.25^a	3.72 ± 1.83^a	2.51 ± 0.02^a
Valine	2.83 ± 0.33^a	3.23 ± 0.49^a	4.831 ± 1.15^a	3.07 ± 1.04^a	2.67 ± 0.02^a
Methionine	9.99 ± 2.09^b	14.14 ± 2.66^a	3.27 ± 1.27^c	2.64 ± 0.02^c	1.66 ± 0.01^c
Phenylalanine	17.30 ± 3.19^b	21.84 ± 1.09^a	3.78 ± 0.49^c	2.73 ± 0.01^c	1.39 ± 0.02^c
Threonine	2.43 ± 0.27^b	3.99 ± .67^a	3.61 ± 1.26^a	2.54 ± 0.06^b	1.58 ± 0.01^c
Non-essential amino acid	87.80 ± 2.63^b	124.31 ± 4.28^a	51.44 ± 2.74^c	43.44 ± 1.66^c	30.09 ± 1.23^c
Glycine	7.99 ± 0.92^b	11.73 ± 0.93^a	6.73 ± 2.13^b	4.83 ± 1.77^c	3.42 ± 0.74^c
Alanine	4.54 ± 0.78^b	10.84 ± 1.67^a	5.62 ± 1.73^b	4.71 ± 2.15^b	3.28 ± 1.04^b
Arginine	5.93 ± 0.26^b	7.62 ± .46^a	6.58 ± 1.42^a	5.63 ± 1.48^b	4.43 ± 1.32^b
Cysteine	ND	ND	1.06 ± 0.02^a	0.88 ± 0.01^b	0.21 ± 0.01^b
Serine	4.01 ± 0.57^a	4.54 ± 0.89^a	3.82 ± 1.25^a	2.54 ± 0.01^a	1.53 ± 0.01^b
Proline	2.98 ± 0.38^b	9.30 ± 0.25^a	3.51 ± 1.18^b	3.69 ± 1.08^b	2.48 ± 0.01^b
Tyrosine	6.01 ± 1.30^a	6.59 ± 0.92^a	2.26 ± 0.07^b	2.19 ± 0.06^b	1.81 ± 0.01^b
Aspartic acid	9.01 ± 0.98^a	10.55 ± 2.33^a	8.48 ± 2.17^a	6.87 ± 2.05^b	4.61 ± 1.23^c
Glutamic acid	12.66 ± 1.20^b	16.08 ± 1.22^a	13.38 ± 2.85^b	12.10 ± 2.84^b	8.32 ± 2.63^c

^a–cMeans with different superscripts within the same row significantly (p ≤ 0.05) different. Values represent the mean of 3 independent replicates ± SE.