scholarly journals Postprandial changes in plasma free amino acid levels obtained simultaneously from the hepatic portal vein and the dorsal aorta in rainbow trout (Oncorhynchus mykiss)

2006 ◽  
Vol 209 (24) ◽  
pp. 4885-4894 ◽  
Author(s):  
A. Karlsson ◽  
E. J. Eliason ◽  
L. T. Mydland ◽  
A. P. Farrell ◽  
A. Kiessling
Keyword(s):  
Rainbow Trout ◽  
Amino Acid ◽  
Portal Vein ◽  
Oncorhynchus Mykiss ◽  
Free Amino Acid ◽  
Free Amino ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Hepatic Portal Vein ◽  
Amino Acid Levels ◽  
Hepatic Portal

scholarly journals Ammonia detoxification and localization of urea cycle enzyme activity in embryos of the rainbow trout (Oncorhynchus mykiss) in relation to early tolerance to high environmental ammonia levels

2001 ◽  
Vol 204 (12) ◽  
pp. 2145-2154 ◽  
Author(s):  
Shelby Louise Steele ◽  
Terry David Chadwick ◽  
Patricia Anne Wright
Keyword(s):  
Rainbow Trout ◽  
Amino Acid ◽  
Oncorhynchus Mykiss ◽  
Urea Cycle ◽  
Total Amino Acid ◽  
Cycle Enzyme ◽  
Embryonic Tissues ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Amino Acid Levels ◽  
Urea Cycle Enzyme

SUMMARY The present study investigated the role of ammonia as a trigger for hatching, mechanisms of ammonia detoxification and the localization of urea cycle enzymes in the early life stages of freshwater rainbow trout (Oncorhynchus mykiss). The key urea cycle enzyme carbamoyl phosphate synthetase III was found exclusively in the embryonic body (non-hepatic tissues); related enzymes were distributed between the liver and embryonic body. ‘Eyed-up’ trout embryos were exposed either acutely (2h) to 10mmoll−1 NH4Cl or chronically (4 days) to 0.2mmoll−1 NH4Cl. Time to hatching was not affected by either acute or chronic NH4Cl exposure. Urea levels, but not ammonia levels in the embryonic tissues, were significantly higher than in controls after both acute and chronic NH4Cl exposure, whereas there were no significant changes in urea cycle enzyme activities. Total amino acid levels in the embryonic tissues were unaltered by chronic ammonia exposure, but levels of most individual amino acids and total amino acid levels in the yolk were significantly lower (by 34–58%) than in non-exposed controls. The data indicate that trout embryos have an efficient system to prevent ammonia accumulation in embryonic tissue, by conversion of ammonia to urea in embryonic tissues and through elevation of ammonia levels in the yolk.

Plasma amino acid levels in rainbow trout (Oncorhynchus mykiss)

1995 ◽  
Vol 11 (3-4) ◽  
pp. 309-316 ◽  
Author(s):  
Annette Schuhmacher ◽  
J. Schön ◽  
M. Goldberg ◽  
J. M. Gropp
Keyword(s):  
Rainbow Trout ◽  
Amino Acid ◽  
Oncorhynchus Mykiss ◽  
Plasma Amino Acid ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Amino Acid Levels

scholarly journals Effect of Pantothenic Acid Deficiency on Plasma Free Amino Acid Profile in Rainbow Trout Oncorhynchus mykiss

1999 ◽  
Vol 65 (5) ◽  
pp. 794-795 ◽  
Author(s):  
Toshiro Masumoto ◽  
Takeo Miki ◽  
Yoshiaki Itoh ◽  
Hidetsuyo Hosokawa ◽  
Sadao Shimeno
Keyword(s):  
Rainbow Trout ◽  
Amino Acid ◽  
Oncorhynchus Mykiss ◽  
Free Amino Acid ◽  
Free Amino ◽  
Pantothenic Acid ◽  
Amino Acid Profile ◽  
Acid Deficiency ◽  
Pantothenic Acid Deficiency
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