title: The effect of the change from a herbage- to a concentrate-based diet on the oxidative stability of raw and cooked lamb meat.
abstract: Over 89 days, 10 lambs (S) were fed concentrates and hay in stall, while 9 lambs (P) grazed at pasture. Two groups of 9 animals grazed at pasture until switching to a concentrate-based diet for 14 or 37 days before slaughter (P-S14 and P-S37). The fat content of longissimus dorsi muscle (LM) increased with increasing duration of concentrate feeding (P=0.05). As a consequence, the concentration of polyunsaturated fatty acids (PUFA) and of the highly peroxidisable (HP) PUFA in the polar lipids was similar between treatments. Lipid oxidation in fresh LM over 8 days of storage was affected by the diet (P<0.0005) with the P-S37 and P treatments producing, respectively, the highest and the lowest TBARS values. The P treatment reduced TBARS in cooked minced LM over 2 days of storage and no difference was found between the P-S14, P-S37 and S treatments. Colour stability of fresh LM was not noticeably affected by the dietary treatment.
authors.affiliation: Dipartimento di Scienze delle Produzioni Agrarie e Alimentari (DISPA), University of Catania, Catania 95123, Italy. giuseppe.luciano@unict.it
authors.forename: G
authors.initials: G
authors.lastname: Luciano
authors.forename: L
authors.initials: L
authors.lastname: Biondi
authors.forename: M
authors.initials: M
authors.lastname: Scerra
authors.forename: A
authors.initials: A
authors.lastname: Serra
authors.forename: M
authors.initials: M
authors.lastname: Mele
authors.forename: M
authors.initials: M
authors.lastname: Lanza
authors.forename: A
authors.initials: A
authors.lastname: Priolo
mesh_terms: D000003:Abattoirs; D000821:Animal Feed / Q000032:analysis*; D000818:Animals; D003116:Color; D003296:Cooking; D005231:Fatty Acids, Unsaturated / Q000378:metabolism; D061353:Food Storage; D050356:Lipid Metabolism; D008297:Male; D008460:Meat / Q000032:analysis*; D018384:Oxidative Stress; D064170:Paraspinal Muscles / Q000378:metabolism; D034561:Sheep, Domestic; D017392:Thiobarbituric Acid Reactive Substances / Q000378:metabolism
chemical_list: D005231:Fatty Acids, Unsaturated; D017392:Thiobarbituric Acid Reactive Substances