US EPA

4936335 

Journal Article 

Abstract 

Metabolism of oleyl alcohol and oleic acid in fish 

Sand, DM; Rahn, CH; Schlenk, H 

1971 

Yes 

Journal of the American Oil Chemists' Society
ISSN: 0003-021X
EISSN: 1558-9331 

48 

7 

A329-A329 

English 

WOS:A1971K026300085 

The metabolism of these compounds was studied by feeding them in labeled form to female gouramie (Trichogaster coaby). Within 8 to 6 hr most of the dietary oleyl alcohol is oxidized to acid which is incorporated into triglycerides of intestinal lipids. A much smaller portion of the ingested oleyl alcohol appears as the alcohol moiety of the wax esters in the intestinal lipid. Apparently, this portion has been directly esterified. Wax esters are present also in the blood lipid for about 16 hr after ingestion of oleyl alcohol. However, wax esters are not found in intestinal or blood lipids when oleic acid is fed. After 36 hr, about 75% of the absorbed 18:1 compound is found as alcohol and acid in roe wax esters. This amount of the dietary alcohol or acid is incorporated mainly into immature eggs. Most of the mature eggs of the roe, which are laid within two weeks after feeding, have lower specific radioactivity than the eggs remaining in the fish. Highest specific radioactivity was found in eggs laid four weeks after feeding. When radioactive eggs are fertilized, virtually all of the 18:1 radioactivity is lost within three days. This rapid catabolism of 18:1 in the developing embryo and fish is in strong contrast to the extremely slow turnover which had been found for 18:1 in the adult fish.