Major challenges in culture of Atlantic halibut larvae have been slow growth during the late larval stages and inferior juvenile quality due to pigmentation errors and incomplete eye migration during metamorphosis. The hypothesis of this study was that feeding on‐grown Artemia would alleviate these problems. Artemia were grown for 3–4 days on Origreen or Origo. The growth and nutrient composition of Artemia nauplii and on‐grown Artemia were analysed, and both Artemia types were fed to Atlantic halibut larvae, on‐grown Artemia from 15 days post‐first feeding (dpff). The body length of Artemia increased with 20%–70% in response to on‐growing. In all experiments, protein, free amino acids and the ratio of phospholipid to total lipid increased, while lipid and glycogen decreased. The fatty acid composition improved in some cases and not in others. The micronutrient profiles were not negatively affected in on‐grown Artemia. All these changes are thought to be beneficial for marine fish larvae. The final weight of Atlantic halibut postlarvae was similar, and 90% of the juveniles had complete eye migration in both groups. It is concluded that the present version of Artemia nauplii probably covers the nutrient requirements of Atlantic halibut larvae.

中文翻译：

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生长3–4天的卤虫营养成分的变化以及饲喂成年卤虫对大西洋大比目鱼（Hippoglossus hippoglossus，L.）幼虫性能的影响

大西洋大比目鱼幼虫养殖的主要挑战是幼虫后期生长缓慢，以及由于色素沉着错误和变态过程中不完全的眼球迁移而导致幼鱼质量下降。这项研究的假设是喂养成年的Artemia可以缓解这些问题。卤虫在Origreen或Origo上生长3-4天。生长和营养成分的卤虫无节幼体和上生长的卤虫进行了分析，并且两个卤虫类型送入庸鲽幼虫，上生长的卤虫15天后第一馈送（DPFF）。卤虫的体长随着增长，增长了20％–70％。在所有实验中，蛋白质，游离氨基酸和磷脂与总脂质的比率增加，而脂质和糖原减少。某些情况下脂肪酸组成有所改善，而其他情况则没有。在成年的卤虫中微量营养素分布没有受到负面影响。人们认为所有这些变化对海鱼幼体都是有益的。大西洋大比目鱼幼虫的最终体重相似，两组中90％的幼鱼具有完全的眼球迁移能力。结论是，当前版本的无节肢动物无节幼体可能涵盖了大西洋大比目鱼幼虫的营养需求。