CRC for Sheep Industry Innovation, Homestead Building, UNE, Armidale NSW 2350, Australia; Livestock Production Sciences, Department of Primary Industries, Werribee, Vic. 3030, Australia.
Meat Sci. 2014 Feb;96(2 Pt B):1104-10. doi: 10.1016/j.meatsci.2013.04.007. Epub 2013 Apr 13.
The variation in levels of the health claimable long chain omega-3 fatty acids, eicosapentaenoic acid (EPA, 20:5n-3) plus docosahexaenoic acid (DHA, 22:6n-3) across production regions of Australia was studied in 5726 lambs over 3 years completed in 87 slaughter groups. The median level of EPA plus DHA differed dramatically between locations and sometimes between slaughters from the same location. The ratio of EPA plus DHA from lambs with high values (97.5% quantile) to lambs with low values (2.5% quantile) also differed dramatically between locations, and between slaughters from the same location. Consistency between years, at a location, was less for the high to low value ratio of EPA plus DHA than for the median value of EPA plus DHA. To consistently obtain high levels of omega-3 fatty acids in Australian lamb, there must be a focus on lamb finishing diets which are likely to need a supply of α-linolenic acid (18:3n-3), the precursor for EPA and DHA.
研究了 3 年期间 87 个屠宰组中 5726 只羔羊在澳大利亚不同生产区域可索赔的长链欧米伽-3 脂肪酸（二十碳五烯酸 [EPA，20:5n-3] 和二十二碳六烯酸 [DHA，22:6n-3]）水平的变化。EPA 加 DHA 的中位数水平在不同地点之间存在显著差异，有时甚至在同一地点的不同屠宰场之间也存在显著差异。高值（97.5%分位数）羔羊与低值（2.5%分位数）羔羊之间的 EPA 加 DHA 比率在不同地点之间以及同一地点的不同屠宰场之间也存在显著差异。在同一地点，EPA 加 DHA 的高低值比率在不同年份之间的一致性低于 EPA 加 DHA 的中位数。为了在澳大利亚羊肉中始终获得高水平的欧米伽-3 脂肪酸，必须关注羔羊育肥日粮，这可能需要供应α-亚麻酸（18:3n-3），这是 EPA 和 DHA 的前体。
