Fatty acid compositions of the lipids extracted from various fish feeds (Eco-float, Blue-crown, Uncle -trances, Triton, Stretting, Crown, Jik, Shaldac, Solace, Coppens, Vital, Local sinking, Local feed, Aqualis and Local floating) vended in Lagos State were determined. These feeds were designated as Feeds A to O respectively. Feed samples were procured from major fish feed markets and fish farms within Lagos metropolis and transported to the laboratory for analysis. Methylation was carried out afteroil extraction to convert the fats to their methyl esters and the fatty acids methyl esters (FAME) were separated by gas chromatography. Fatty acids were analysed using a HP Agilent 5890 system gas chromatograph equipped with SP-2330 and a flame ionization detector (FID). Results revealed that the highest values for polyunsaturated fatty acid (PUFA), saturated fatty acid (SFA) and n-3 unsaturated fatty acid (HUFA) were 58.26 in feed F, 38.7 in feed M and 3.59 in feed N respectively while the lowestvalues for PUFA (19.76) and SFA (15.53) were recorded in feeds M and J respectively. The results also showed that, though feed samples were high in monounsaturated fatty acid (MUFA) (55-22) and PUFA (58-19), they were low in n-3 HUFA {eicosapentaenoic acids (EPA, 20:5n-3) and docosahexaenoic acids (DHA, 22:6n-3)} with the values of 0.3-3. The shortfall in EPA and DHA of these feeds may imply that fish fed these feeds may be nutritionally deficient in these fatty acid compositions. Thus, further manipulation may be needed to improve the value of these feeds in terms of EPA and DHA.
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机译：测定了从拉各斯州出售的各种鱼饲料（Eco-float、Blue-crown、Uncle -trances、Triton、Stretting、Crown、Jik、Shaldac、Solace、Coppens、Vital、Local sinking、Local feed、Aqualis 和 Local floating）中提取的脂质的脂肪酸组成。这些源分别被指定为源 A 到 O。饲料样品是从拉各斯大都市内的主要鱼饲料市场和养鱼场采购的，并运送到实验室进行分析。油萃取后进行甲基化，将脂肪转化为甲酯，并用气相色谱法分离脂肪酸甲酯（FAME）。使用配备 SP-2330 和火焰离子化检测器 （FID） 的 HP Agilent 5890 系统气相色谱仪分析脂肪酸。结果表明，多不饱和脂肪酸（PUFA）、饱和脂肪酸（SFA）和]n-3不饱和脂肪酸（HUFA）在饲料F中最高，在饲料M中为38.7%，在饲料N中为3.59%，而PUFA（19.76%）和SFA（15.53%）在饲料M和J中分别为最低值。结果还显示，虽然饲料样品中单不饱和脂肪酸（MUFA）（55-22%）和多不饱和脂肪酸（58-19%）含量较高，但n-3 HUFA（二十碳五烯酸（EPA，20：5n-3）和二十二碳六烯酸（DHA，22：6n-3））含量较低，值为0.3-3%。这些饲料中EPA和DHA的缺乏可能意味着喂食这些饲料的鱼可能在营养上缺乏这些脂肪酸成分。因此，可能需要进一步的操作来提高这些饲料在EPA和DHA方面的价值。
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