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Effect of dietary electrolytes and histidine on histidine metabolism and acid-base balance in rainbow trout (Salmo gairdneri)

Comparative Biochemistry and Physiology, Part B: Comparative Biochemistry

By:
, , and
https://doi.org/10.1016/0305-0491(84)90187-1

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Abstract

1. Rainbow trout fingerlings were fed diets containing 1.2, 1.8 and 2.6% histidine and two mixtures of Na, K and Cl (Na + K - Cl = 0 or -200 meq/kgdiet) in a factorial design.

2. Growth and efficiency of feed conversion were not affected by histidine in the diet when it contained the −200 meq/kg electrolyte mixture, but with the 0 meq/kg level, 2.6% histidine depressed both measures of response.

3. Histidine increased plasma and muscle histidine levels, increased hepatic histidase activity, but did not affect hepatic histidine-pyruvate aminotransferase activity.

4. Muscle-free histidine concentrations were markedly higher and lysine concentrations were lower in trout receiving 0 meq/kg than those receiving the −200 meq/kg electrolyte mixture.

5. The electrolyte balance of the diet has a marked effect on the metabolism of histidine in trout.

Additional publication details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Effect of dietary electrolytes and histidine on histidine metabolism and acid-base balance in rainbow trout (Salmo gairdneri)
Series title:
Comparative Biochemistry and Physiology, Part B: Comparative Biochemistry
DOI:
10.1016/0305-0491(84)90187-1
Volume:
78
Issue:
4
Year Published:
1984
Language:
English
Publisher:
Elsevier
Contributing office(s):
Leetown Science Center
Description:
7 p.
First page:
777
Last page:
783