02526naa a2200241 a 450000100080000000500110000800800410001902400500006010000150011024501080012526000090023352018240024265000240206665000270209065000100211765000230212765000100215065000170216065000130217765000150219065000100220577300690221515220692025-06-07       1975    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.2527/jas1975.4161767x2DOI1 aRAY, E. E.  aRelationship between fatty acid composition of lamb fat and dietary ingredients.h[electronic resource]  c1975  aOne hundred thirteen wether feeder lambs were individually fed to study the effects of ration and location of fat in the carcass upon fatty acid composition. The rations consisted of dehydrated alfalfa (17% protein) and corn. The proportions of alfalfa and corn varied from 0% to 100% in the 21 different rations by 5% increments. A urea-mineral supplement was added to rations containing 50% corn or more. The lambs were slaughtered after a feeding period of 105 days. Loin, dock and kidney fat samples were obtained from chilled (48 hr) carcasses. Fat samples were extracted, esterified and analyzed by gas-liquid chromatography. Data were statistically analyzed by analysis of variance and orthogonal polynomial regression. Depot fat contents of unsaturated acids (myristoleic, palmitoleic, oleic, linoleic, and linolenic) were affected by rations. Myristoleic, palmitoleic and linoleic significantly increased curvilinearly, oleic increased linearly and linoleic decreased linearly as level of corn increased. Linoleic acid contents were confounded by saturation of dietary linolenic, and oleic contents were confounded by saturation of dietary linoleic. There were no difference in saturated fatty acids, myristic and palmitic, but there was a curvilinear decrease in stearic. One could hy pothesize that these results may be related to non-mitochondrial fat biosynthesis, as influenced by the additional volatile fatty acids absorption. Differences were found between locations sampled for all fatty acids studied except myristic and palmitic acids. Saturated acids were deposited in the following order: kidney, dock and loin, whereas odd-chained acids and unsaturates, except linolenic, were deposited in reverse order. There were no differences in linolenic between loin and kidney and kidney and dock samples.  aCarcass composition  aFatty acid composition  aLambs  aRuminant nutrition  aSheep  aÁcido Graxo  aCarcaça  aNutrição  aOvino  tJournal of Animal Sciencegv. 41, n. 6, p. 1767-1774, Dec. 1975.