title: Changes in texture, colour and fatty acid composition of male and female pig shoulder fat due to different dietary fat sources.
abstract: Two experiments with 72 slaughter pigs in each were conducted. Entire males and females were individually fed restricted. Palm kernel-, soybean- and fish-oil were used in varying combinations, giving different dietary fat levels (29-80g/kg) and iodine values ranging from 50 to 131. Shoulder fat was analysed for fatty acid composition (inner and outer layer), firmness and colour. A clear dose-response relationship was seen between fatty acids in diets and in shoulder fat. Interestingly, the very long chain n-3 fatty acids seemed to be deposited more efficiently when additional fat was included in the diet. Both high and low dietary iodine values changed towards less extreme iodine values in fat. Low-fat diets enhanced de novo synthesis of fatty acids. Males revealed a higher percentage of PUFA and a lower percentage of C18:1 and MUFA. Fat firmness, but not colour, was influenced by sex and dietary fat source.
authors: Department of Animal and Aquacultural Sciences, Norwegian University of Life Sciences, P.O. Box 5003, N-1432 Ås, Norway. elin.hallenstvedt@fkf.no
authors: E
authors: E
authors: Hallenstvedt
authors: N P
authors: NP
authors: Kjos
authors: M
authors: M
authors: Overland
authors: M
authors: M
authors: Thomassen
mesh_terms: D000821:Animal Feed / Q000032:analysis*; D000818:Animals; D050218:Body Fat Distribution; D003116:Color; D004032:Diet; D018752:Diet, Fat-Restricted; D004041:Dietary Fats / Q000008:administration & dosage*; D005229:Fatty Acids, Monounsaturated / Q000032:analysis*; D015525:Fatty Acids, Omega-3 / Q000032:analysis*; D005260:Female; D005395:Fish Oils; D006799:Housing, Animal; D016014:Linear Models; D008297:Male; D008460:Meat; D012737:Sex Factors; D012782:Shoulder; D013552:Swine
chemical_list: D004041:Dietary Fats; D005229:Fatty Acids, Monounsaturated; D015525:Fatty Acids, Omega-3; D005395:Fish Oils