Optimizing larval rearing protocols is critical to successful intensive fish culture. We compared the efficacy of feeding strategies for larvae of maraena whitefish Coregonus maraena, a promising candidate for intensive aquaculture. Survival, growth indicators, intestine development, and liver status were compared in larvae fed live feed, commercial dried feed, and weaned from live to dried feed at 5, 10, 15, 20, or 25 days post hatching (dph). Seven experimental groups in three repetitions used 5,250 larvae (2 dph, initial body weight = 7.4 ± 0.1 mg; initial total length = 13.0 ± 0.1 mm). This 30-day trial showed initial weaning from live feed (Artemia sp.) to artificial diet after 15 days to be the optimal, with beneficial effects on growth, body weight, and larva yield. No differences in survival rate, size heterogeneity, and or condition factor were observed among groups. Live feed and weaning to artificial diet at the appropriate time was beneficial to intestine development, while feeding on artificial feed only was associated with severe intestine impairment. Liver pathology was not seen in any group.

中文翻译：

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饲喂策略对鳜鱼幼鱼存活、生长、肠道发育和肝脏状态的影响

优化幼虫饲养方案对于成功的集约化鱼类养殖至关重要。我们比较了用于集约化水产养殖的有希望的候选者 Maraena whitefish Coregonus maraena幼鱼的喂养策略的功效。在孵化后第 5、10、15、20 或 25 天 (dph) 喂食活饲料、商业干饲料和从活饲料断奶到干饲料的幼虫的存活率、生长指标、肠道发育和肝脏状态进行了比较。三个重复的七个实验组使用了 5,250 只幼虫（2 dph，初始体重 = 7.4 ± 0.1 毫克；初始总长度 = 13.0 ± 0.1 毫米）。这项为期 30 天的试验表明，最初断奶的活饲料（卤虫sp.) 15 天后人工饲料是最佳的，对生长、体重和幼虫产量有有益影响。组间未观察到存活率、大小异质性和/或状况因素的差异。活饲料和适时断奶人工饲料有利于肠道发育，而仅饲喂人工饲料与严重的肠道损伤有关。在任何组中均未观察到肝脏病理学。