This work aimed to determine fatty acid dynamics and lipid composition of female muscle, oocytes, newly hatched larvae (NHL) and first feeding larvae (FFL) of Prochilodus argenteus. Oocytes and NHL had the highest percentages of total lipids. Neutral lipids (NL) and polar lipids (PL) remained constant from oocytes through the larval stages (P < 0.05). Among NL, C18:2n 6 had its highest percentage in muscle (P < 0.05) and C18:3n 3 in muscle and oocytes. The highest percentages of arachidonic acid (AA) were in muscle and FFL. The highest percentages of n-9 and n-6 series were in muscle. The highest values of n-3HUFA were in the larval stages while the highest of n-6HUFA were in muscle and FFL. Percentage of ∑SFA in LN was highest in oocytes, NHL and FFL (P < 0.05) while ∑MUFA was highest in muscle, oocytes and NHL. The highest percentages of ∑PUFA were in muscle and FFL. For PL, however, C18:2n 6 and AA were highest in muscle (P < 0.05) while eicosapentaenoic acid was highest in muscle and oocytes. Percentage of ∑SFA in LP was highest in NHL and lowest in FFL and muscle. The highest percentage of ∑MUFA was in oocytes, NHL and FFL (P < 0.05). The highest percentages for series n-9 were in oocytes and FFL (P < 0.05), while the highest percentages for series n-6 were in muscle and oocytes. The lowest percentage for n-6HUFA was in NHL. The n-3 fatty acids were incorporated into the yolk from body reserves, which were stored prior to vitellogenesis and mobilized to the oocytes. The increase in docosahexaenoic acid reflects the ability of the species to lengthen and desaturate C18:3n 3 yielding n-3HUFA, thus demonstrating the importance of this fatty acid during early development.

这项工作旨在确定阿根廷Prochilodus argenteus的女性肌肉，卵母细胞，新孵化的幼虫（NHL）和首次进食的幼虫（FFL）的脂肪酸动力学和脂质组成。卵母细胞和NHL占总脂质的百分比最高。从卵母细胞到幼虫阶段，中性脂质（NL）和极性脂质（PL）保持恒定（P <0.05）。在NL中，C18：2n 6在肌肉中的百分比最高（P <0.05），而C18：3n 3在肌肉和卵母细胞中的百分比最高。花生四烯酸（AA）的最高百分比出现在肌肉和FFL中。n-9和n-6系列的最高百分比出现在肌肉中。n-3HUFA的最大值在幼虫期，而n-6HUFA的最大值在肌肉和FFL中。∑的百分比LN中的SFA在卵母细胞，NHL和FFL中最高（P <0.05），而ΣMUFA在肌肉，卵母细胞和NHL中最高。比例最高Σ PUFA是在肌肉和FFL。然而，对于PL，肌肉中C18：2n 6和AA最高（P <0.05），而二十碳五烯酸在肌肉和卵母细胞中最高。LP中∑ SFA的百分比在NHL中最高，而在FFL和肌肉中最低。∑的最高百分比MUFA位于卵母细胞，NHL和FFL中（P <0.05）。n-9系列的最高百分比出现在卵母细胞和FFL中（P <0.05），而n-6系列的最高百分比出现在肌肉和卵母细胞中。n-6HUFA的最低百分比是NHL。将n-3脂肪酸从身体储备中掺入蛋黄，卵黄发生之前先将其储存并动员到卵母细胞中。二十二碳六烯酸的增加反映了该物种延长和不饱和C18：3n 3产生n-3HUFA的能力，因此证明了该脂肪酸在早期发育过程中的重要性。