Fatty acid composition of two different muscles in rabbits: alterations in response to saturated or unsaturated dietary fatty acid complementation
DOI:
https://doi.org/10.4995/wrs.2001.459Abstract
Two experiments were carried out to determine differences in the fatty acid profile of two rabbit muscles, longissimus dorsi (l.d.) and vastus latera/is (v.l.). Fatty acid analysis was carried out by gas chromatography on the samples of ten 8-week-old rabbits, in the first experiment after a 4-week feeding period with a commercial pelleted diet, to obtain information about possible differences. In the second experiment 4-week treatments were performed with two high-fat experimental feeds, from which one was complemented with a saturated animal fat source (FAT) and the other with an unsaturated fat source, full-fat soya (SOYA). Samples were obtained from eighteen 8-week-old rabbits per diet. With the commercial diet, significant differences were evidenced between the 2 muscles for C14:0, C18:1 (20.9 and 17.5 % for l.d. and v.l.), C18:2 n-6 (24.5 and 27.9 % for l.d. and v.l.) and C20:4 (n-6). On average C16:0 proportion was 26.8 %, that of C18:0 was 8.5% and that of C18:3 (n-3) was 2.32 %. After FAT feeding C14:0, C16:1, C18:0, C18:1, C18:2(n-6) and C20:4 were found to differ. SOYA feeding caused alterations in C14:0, C16:0, C18:0, C18:1 and C18:3. With SOYA feeding proportion of C18:2 increasesd up to 35 % in both muscles.
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