title: Characterization of the fatty acid composition of lamb commercially available in northern Spain: Emphasis on the trans-18:1 and CLA content and profile.
abstract: A survey of commercially available lamb meat was performed in northern Spain in order to evaluate their fatty acid (FA) composition with emphasis on trans fatty acid (TFA) and conjugated linoleic acid (CLA) isomers. Samples were collected in spring (n=24) and winter (n=24) of 2013, and were obtained in about equal numbers from grocery stores and butcher-shops. Subcutaneous fat, known to be a sensitive indicator of TFA content in ruminants, was analyzed by GC-FID. In general, very few differences were observed between collection periods and type of stores because of the high variability within the groups that was believed to be associated with differences in genetics and feeding strategies. However, the 10t/11t ratio of all samples showed two clearly identifiable groups irrespective of the source: 1) when 10t/11t was >1, 10t-shifted samples; 2) when 10t/11t was ≤1, non-shifted samples where 11t-18:1 was the predominant isomer. These two groups were clearly identified and associated with distinct FAs using principal component analysis.
authors.affiliation: Quality & Safety of Ruminant Products, Department of Pharmacy & Food Sciences, Faculty of Pharmacy, University of the Basque Country (UPV/EHU), 01006, Vitoria-Gasteiz, Spain.
authors.forename: Leire
authors.initials: L
authors.lastname: Bravo-Lamas
authors.affiliation: Quality & Safety of Ruminant Products, Department of Pharmacy & Food Sciences, Faculty of Pharmacy, University of the Basque Country (UPV/EHU), 01006, Vitoria-Gasteiz, Spain.
authors.forename: Luis J R
authors.initials: LJ
authors.lastname: Barron
authors.affiliation: Guelph Food Research Centre, Agriculture & Agri-Food Canada, Guelph, ON, Canada.
authors.forename: John K G
authors.initials: JK
authors.lastname: Kramer
authors.affiliation: Quality & Safety of Ruminant Products, Department of Pharmacy & Food Sciences, Faculty of Pharmacy, University of the Basque Country (UPV/EHU), 01006, Vitoria-Gasteiz, Spain.
authors.forename: Iñaki
authors.initials: I
authors.lastname: Etaio
authors.affiliation: Quality & Safety of Ruminant Products, Department of Pharmacy & Food Sciences, Faculty of Pharmacy, University of the Basque Country (UPV/EHU), 01006, Vitoria-Gasteiz, Spain. Electronic address: noelia.aldai@ehu.eus.
authors.forename: Noelia
authors.initials: N
authors.lastname: Aldai
mesh_terms: D000822:Animal Husbandry; D000818:Animals; D005227:Fatty Acids / Q000032:analysis*; D008460:Meat / Q000032:analysis*; D012756:Sheep / Q000235:genetics / Q000502:physiology; D013030:Spain
chemical_list: D005227:Fatty Acids
keywords: Ovine; Rumenic acid; Survey; Trans fatty acids; Vaccenic acid