Journal
LIPIDS
Volume 40, Issue 1, Pages 39-47Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11745-005-1358-4
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Post-smolt Atlantic salmon (Salmo salar) were fed six diets in which capelin oil was replaced with 0, 25, 50, 75, or 100% rapeseed oil (RO; low-erucic acid) or 50% olive oil (OO). The experimental diets were fed to single groups of Atlantic salmon for 42 wk, whereas the 100% capelin oil (0% RO) diet was fed in duplicate. The beta-oxidation capacity of palmitoyl-CoA was determined, using a method optimized for salmon tissues, at the start of the experiment, after 21 wk (October), and after 42 wk (March) in red and white muscle and in liver. Red Muscle showed the highest specific beta-oxidation capacity, but when expressed as total beta-oxidation capacity for the whole tissue, white muscle was the most important tissue for the beta-oxidation of FA. From the initial to the final sampling, the beta-oxidation capacity of white muscle increased significantly, whereas the beta-oxidation capacity in liver decreased significantly. After 22 wk, white muscle exhibited an increased beta-oxidation capacity when the dietary RO content was raised from 25 to 75%, with similar effects in red muscle and liver after 42 wk of feeding. The present results also show that the beta-oxidation capacity increased with an increase in fish size.
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