Valine

The valine requirement values of fish are presented in Table 23.6. There is reasonable agreement between the values reported for the species studied, indicating that the requirement ranges from about 30 to 40 g kg-1 of dietary protein. Studies showed that serum valine levels in the channel catfish responded to valine intake in a manner similar to that described for isoleucine (Wilson et al., 1980).

Table 23.5. Leucine requirements (g kg-1 of protein) of various fish species.

Fish

Requirement

Type of diet

Reference

Catla

37

Purified

Ravi and Devaraj (1991)

Channel catfish

35

Purified

Wilson et al. (1980)

Chinook salmon

39

Purified

Chance etal. (1964)

Chum salmon

38

Purified

Akiyama and Arai (1993)

Clarias hybrid

35

Purified

Unprasert (1994)

Coho salmon

34

Purified

Arai and Ogata (1993)

Common carp

33

Purified

Nose (1979)

Japanese eel

53

Purified

Arai (in Nose, 1979)

Lake trout

35—46a

Practical

Hughes etal. (1983)

Milkfish

51

Purified

Borlongan and Coloso (1993)

Nile tilapia

28-36

Purified

Santiago and Lovell (1988)

aThese values were recalculated based on the calculated nitrogen content of the test diets.

aThese values were recalculated based on the calculated nitrogen content of the test diets.

Table 23.6. Valine requirements (g kg-1 of protein) of various fish species.

Fish

Requirement

Type of diet

Reference

Catla

36

Purified

Ravi and Devaraj (1991)

Channel catfish

30

Purified

Wilson et al. (1980)

Chinook salmon

32

Purified

Chance etal. (1964)

Chum salmon

30

Purified

Akiyama and Arai (1993)

Coho salmon

22

Purified

Arai and Ogata (1993)

Common carp

36

Purified

Nose (1979)

Japanese eel

40

Purified

Arai (in Nose, 1979)

Lake trout

26—33a

Practical

Hughes etal. (1983)

Milkfish

36

Purified

Borlongan and Coloso (1993)

Nile tilapia

28

Purified

Santiago and Lovell (1988)

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