Linseed, microalgae or fish oil dietary supplementation affects performance and quality characteristics of light lambs

Abstract

The aim of this work was to improve the fatty acid profile of meat from light lamb, frequently reared in Spain and in other Mediterranean countries. A total of 44 light lambs fed different n-3 polyunsaturated fatty acids sources were studied: control (C) (palm oil), extruded linseed (L), extruded linseed mixed with microalgae (LM) and fish oil (FO). The productive performance from 14.7 to 26.2 kg of live weights and meat quality characteristics during refrigerated storage were assessed. Lambs fed FO showed lower feed intake (p <0.001), average daily gain (p <0.001) and higher feed conversion ratio (p <0.001) than lambs from the other treatments. Fish oil meat had the lowest (p <0.01) protein proportion and the highest (p <0.001) C20:5n-3, C22:5n-3 and C22:6n-3 proportions, while L or LM produced the highest (p <0.001) C18:3n-3 deposition. Fish oil meat had higher (p <0.05) L* and lower (p <0.001) a* than meats from the other treatments. After 7 days of storage, FO meat showed the highest TBARS (p <0.001), while C meat showed similar value to 0 days of storage. Additionally, FO underwent higher microbial growth after 7 days of storage as compared to the other treatments. Dietary supplementation with L and LM leads to C18:3n-3 meat enrichment and to a microbial load and colour characteristics similar to those of C, without adverse effect on lamb performance. However the use of FO improves the fatty acid profile of meat, but negatively affects lamb performance and meat quality.

Influence of Maternal and Postweaning Linseed Dietary Supplementation on Growth Rate, Lipid Profile, and Meat Quality Traits of Light Sarda Lambs

“…A remarkable increase of vaccenic acid, linoleic acid (C18:2 c9 c12), ALA, and the sum of LC-PUFA n-3 was induced by the EL-20-enriched diet. These results are in agreement with data obtained by de la Fuente-Vázquez et al [ 7 ] with Manchego lambs fed a concentrate containing 8.7% EL. In this study a decrease in SFA and MUFA and an increase in PUFA and n-3 FA, C18:3 n-3 in particular (6.5-fold higher compared to control), was observed.…”

“…These results are in accordance with Moloney et al [ 39 ], who reported similar trends in final pH and color of SM and LL of lambs fed with linseed oil and NaOH-treated linseed compared to a control group. Similarly, only few differences were reported in the meat composition of Manchego lambs fed with EL, when compared to control animals, and no effects were recorded in the meat of lambs derived from Churra ewes fed with a linseed oil-enriched diet [ 7 , 40 ]. However, the comparison with data reported by other authors should be carefully considered as the differences between experimental factors can influence the final meat quality characteristics.…”

Effect of a Diet Supplemented with Malic Acid–Heat (MAH) Treated Sunflower on Carcass Characteristics, Meat Composition and Fatty Acids Profile in Growing Lambs

“…Carcass fatness was subjectively evaluated using the 1-4 points scoring system following the community scale for classification of lamb carcass [10]. The dorsal fat thickness was measured at 4 cm from the carcass midline and at 4 cm from the caudal edge of the last rib with a digital calibrator [11]. The kidney knob and channel fat (KKCF) score was assessed using a 1 to 3 scale [12].…”

“…Three measurements were made on each location and values were averaged before statistical analysis. The calibration was performed as described by [11] using standard white tiles prior to color measurements. The color coordinates were expressed following the CIELAB system [13] as L* (brightness), a* (red-green index) and b* (yellow-blue index).…”

Evaluation of carcass and meat quality in native wrzos�wka lambs fed linseed-supplemented diet

“…Ponad 6-krotny wzrost zawartości kwasu C18:3 stwierdzili Fuente-Vazquez i wsp. [7] w mięsie jagniąt lokalnej rasy, żywionych do woli mieszanką treściwą z 12,5-procentowym udziałem nasion lnu. Autorzy zaobserwowali także wzrost zawartości innych kwasów z grupy n-3 (C20:5, C22:5, C22:6), co również miało wpływ na znacznie niższy, a więc korzystniejszy stosunek n-6/n-3 w grupie żywionej mieszanką z dodatkiem nasion lnu.…”