Larval rearing techniques with suitable nursery feed should be prioritized for better survival and growth. We evaluate the potential use of Cyclops abyssorum divergens as a natural live food candidate instead of the costly traditional Artemia franciscana in the feeding strategy for Dicentrarchus labrax larvae. C. abyssorum divergens and A. franciscana were enriched with mixed valuable algae strains (Isochrysis galbana, Tetraselmis chuii, Chlorella marina and Nannochloropsis oculata) that were used in equal biomass proportions (1:1:1:1) on dry weight basis. Amino acids and fatty acid profiles were found to be highly significantly different in enriched C. abyssorum divergens (EC) compared to enriched A. franciscana (EA). The findings also revealed compensated deficiency in some amino acids such as histidine, isoleucine, and methionine in EC and also increased levels of total essential amino acids (EAA) in EC by 8.2 % more than that of EA. Further metabolizing of palmitic acid (C16:0) and bio-conversion of α- linolenic acid, ALA (C18:3 n-3) to high accumulation of DHA fatty acid lead to higher PUFAs contents in EC and lower levels in EA. Specific growth rates (SGR) and survival percentages (S %) of D. labrax were higher in larvae fed with EC compared to the lower values in EA. Moreover, analyzing final carcass composition revealed increased levels of DHA fatty acid attaining DHA/EPA ratio in fish-fed EC of 2.95 % (>1) compared to 0.90 % (<1) in larvae-fed EA. The elevated levels of the amino acids in the larvae-fed EC were a yardstick to the surged growth and survival rate of the examined species. The present study concluded that C. abyssorum divergens is the best promising candidate for Sea bass larvae-culture.

应优先考虑采用适合的育苗饲料的幼虫饲养技术，以提高存活率和生长率。我们评估了独眼巨人作为天然活食候选物的潜在用途，而不是昂贵的传统大麦蒿（Artemia franciscana）在Dicentrarchus labrax幼虫的喂养策略中的应用。C. abyssorum divergens和A. franciscana富含混合有价值的藻类菌株（等鞭金藻，Tetraselmis chuii，小球藻和Nannochloropsis oculata），以干重计，以相等的生物质比例（1：1：1：1）使用。氨基酸和脂肪酸被发现酸型材是在富含高度显著不同C. abyssorum divergens相比富集（EC）A.旧金山湾（EA）。研究结果还表明，EC中某些氨基酸（如组氨酸，异亮氨酸和蛋氨酸）的补偿性缺乏，并且EC中总必需氨基酸（EAA）的水平比EA增加了8.2％。棕榈酸（C16：0）的进一步代谢和α-亚麻酸（ALA）（C18：3 n- 3）的生物转化为DHA脂肪酸的高积累，导致EC中的PUFA含量较高，而EA中的含量较低。D. labrax的比增长率（SGR）和存活率（S％）饲喂EC的幼虫较高，而EA较低。此外，对最终car体成分的分析显示，在鱼饲EC中达到DHA / EPA比的DHA脂肪酸含量增加了2.95％（> 1），而在幼鱼EA中则达到了0.90％（<1）。幼虫饲喂的EC中氨基酸水平的升高是被测物种快速生长和成活率的标准。本研究得出结论，深渊梭菌是鲈鱼幼虫培养的最有希望的候选者。