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首页> 外文期刊>Aquaculture Research >Dietary effects of n-3 highly unsaturated fatty acid levels on egg and larval quality, and the fatty acid composition of the eggs of Chilean flounder Paralichthys adspersus broodstock
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Dietary effects of n-3 highly unsaturated fatty acid levels on egg and larval quality, and the fatty acid composition of the eggs of Chilean flounder Paralichthys adspersus broodstock

机译：n-3高不饱和脂肪酸水平对智利比目鱼Paralychthys adspersus亲鱼的卵和幼虫质量以及卵中脂肪酸组成的饮食影响

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tThe effects of dietary n-3 highly unsaturated fatty acid (n-3 HUFA) on eggs and larval quality were investigated in the Chilean flounder Paralichthys adspersus. Broodstock were fed with three formulated diets with similar proximate compositions but different n-3 HUFA (2.1%, 3.1% or 4.1%) estimated levels from 5 months before and during the spawning period. The diet with an intermediate n-3 HUFA level resulted in a significantly higher (P<0.05) percentage of buoyant eggs (68.2 plus or minus 2.9%), fertilization (92.8 plus or minus 3.9%), normal cell cleavages (93.5 plus or minus 1.9%), hatching rate (87.7 plus or minus 4.1%) and normal larvae (76.3 plus or minus 3.7%) compared with the other two diets. In contrast, high levels of n-3 HUFA produced larvae with a higher survival capacity when subjected to fasting. The diet with the lowest content of n-3 HUFA produces lower quality eggs and larvae. The n-3 HUFA level in eggs increased with an increase in the dietary level, and the n-3-n-6 ratios were 1:1, 2:1 and 3:1. The DHA-EPA and EPA-ARA ratios of 2 and 4 in eggs, respectively, were associated with improved egg and larval quality and were similar to the ratios found in eggs from wild broodstock. Attainment of optimal fatty acid contents in broodstock diets is one of the key factors for producing the high-quality spawning required for managed culture of this flounder.
机译：t在智利比目鱼Paralichthys adspersus中研究了日粮n-3高不饱和脂肪酸（n-3 HUFA）对鸡蛋和幼虫品质的影响。从产卵期前五个月和产卵期开始，向亲鱼饲喂三种配方的日粮，其组成相似，但n-3 HUFA的含量不同（2.1％，3.1％或4.1％）。 n-3 HUFA水平处于中等水平的日粮导致浮蛋（68.2正负2.9％），受精（92.8正负3.9％），正常细胞分裂（93.5正负）显着更高（P <0.05）百分比减去1.9％），孵化率（分别为87.7正负4.1％）和正常幼虫（分别为76.3正负3.7％）。相反，禁食时高水平的n-3 HUFA幼虫具有较高的生存能力。 n-3 HUFA含量最低的饮食会产生较低质量的卵和幼虫。鸡蛋中n-3 HUFA的水平随饮食水平的增加而增加，n-3-n-6的比例为1：1、2：1和3：1。鸡蛋中DHA-EPA和EPA-ARA比率分别为2和4与改善的鸡蛋和幼虫质量有关，与野生亲鱼卵中的比率相似。亲鱼日粮中最佳脂肪酸含量的获得是产生该比目鱼有序养殖所需的高质量产卵的关键因素之一。

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