Effect of weaning status on lipids of Galician Blond veal: total fatty acids and 18:1 cis and trans isomers.
The effect of weaning at different ages (NW=not weaned, W5=5.5 months and W2=2 months) on fatty acids (FA) of the Longissimus thoracis (LT) muscle was studied in 36 Galician Blond (GB) calves. Total FA (TFA) were determined by gas chromatography (GC) and 18:1 isomers by a combination of reversed-phase high performance liquid chromatography (HPLC) and GC. NW group showed higher (P<0.001) values of n-3 polyunsaturated FA (PUFA), conjugated linoleic acid (CLA) and 18:1 trans-11 compared to LT from W5 and W2 calves. W2 calves showed the highest levels of n-6 PUFA (P<0.01), 18:1 trans-10 and 18:1 trans-6/7/8 (P<0.001). Generally, W5 calves had intermediate values for TFA and 18:1 isomers. As the suckling period was longer, GB milk and veal FA profiles became more similar, it seems that muscle FA were partially transmitted by the milk FA intake due to the persistence of the reticular grove closing reflex.
Bispo
Esperanza
E
Department of Animal Production, Mabegondo Research Centre INGACAL, Apdo 10, 15080 A Coruña, Spain. espebazarra@yahoo.es
Moreno
Teresa
T
Latorre
Alicia
A
González
Laura
L
Herradón
Pedro G
PG
Franco
Daniel
D
Monserrat
Lorenzo
L
D000821:Animal Feed; D000818:Animals; D002417:Cattle; D002849:Chromatography, Gas; D002851:Chromatography, High Pressure Liquid; D004041:Dietary Fats / Q000008:administration & dosage*; D005227:Fatty Acids / Q000008:administration & dosage / Q000032:analysis*; D007536:Isomerism; D008460:Meat / Q000032:analysis*; D008892:Milk; D018482:Muscle, Skeletal / Q000737:chemistry*; D013997:Time Factors; D044242:Trans Fatty Acids / Q000032:analysis; D014886:Weaning
D004041:Dietary Fats; D005227:Fatty Acids; D044242:Trans Fatty Acids