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 

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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