Table 7 Comparison of amino acid composition (mean±SE) of adult hilsa (>800 g) from Hooghly and Padma river systems.

Threonine**

3.12^a ± 0.05

4.73^b ± 0.03

Valine**

3.65^a ± 0.04

5.25^b ± 0.09

Methionine

0.01 ± 0.00

0.00

Isoleucine**

10.21^b ± 0.09

2.85^a ± 0.62

Leucine*

30.52^b ± 2.84

10.65^a ± 0.325

Phenylalanine

3.14 ± 0.16

2.81 ± 0.11

Histidine

2.11 ± 0.01

1.96 ± 0.05

Lysine

6.67 ± 0.21

4.70 ± 1.01

Arginine

4.97 ± 1.05

0.93 ± 0.04

Total EAA**

64.40^b ± 1.26

33.88^a ± 1.19

Aspartic acid**

4.74^a ± 0.05

12.81^b ± 0.03

Serine**

1.60^a ± 0.02

4.08^b ± 0.11

Glutamic acid**

5.67^a ± 0.18

17.70^b ± 0.46

Proline**

4.19^b ± 0.11

0.32^a ± 0.04

Glycine*

11.31^b ± 0.47

8.09^a ± 0.40

Alanine**

5.46^a ± 0.35

19.83^b ± 0.05

Cysteine*

0.12^a ± 0.01

0.33^b ± 0.03

Tyrosine*

0.54^a ± 0.06

1.00^b ± 0.08

Total NEAA**

33.62^a ± 1.24

64.16^b ± 1.19