Abu-Elala Nermeen M, Ali Tamer El-Sayed, Ragaa Naela M, Ali Sara E, Abd-Elsalam Reham M, Younis Nehal A, Abdel-Moneam Dalia A, Hamdien Aya H, Bonato Melina, Dawood Mahmoud A O
Department of Aquatic Animal Medicine and Management, Faculty of Veterinary Medicine, Cairo University, Giza 12211, Egypt.
Department of Oceanography, Faculty of Science, Alexandria University, Alexandria 21568, Egypt.
Animals (Basel). 2021 Mar 14;11(3):815. doi: 10.3390/ani11030815.
The present study aimed to evaluate the effect of dietary fermented extracts sourced from (nucleotides, β-glucans and MOS) (Hilyses) on the production and health of Nile tilapia () broodstock, as well as on seed survival and performance. The trial was performed in a hatchery along the spawning season and continued in the laboratory to monitor the performance in fry and fingerlings. The broodstock were divided into two groups, (C) fed a basal diet and (H) fed 0.4% Hilyses. Blood and histological parameters, antioxidant power, cortisol level and the expression of some immune-related (, and ) and growth-related genes ( and ) were measured. The obtained seeds were subdivided into four treatments: (C-C) fed a basal diet, (C-H) fed 0.4% Hilyses, (H-C) fed a basal diet and (H-H) fed 0.4% Hilyses. Results revealed that the dietary inclusion of Hilyses in the broodstock increased seed production, survival, hematological parameters, and antioxidant power. Moreover, it improved the intestinal microstructure and upregulated the immune- and growth-related genes. The growth indices of fry and fingerlings were significantly increased in all Hilyses-treated groups ( < 0.05). The performance in the (H-H) group significantly surpassed those of all groups. Therefore, dietary fermented yeast could be used as a strategic solution to sustain tilapia production.
本研究旨在评估源自（核苷酸、β-葡聚糖和甘露寡糖）（希利西斯）的膳食发酵提取物对尼罗罗非鱼亲鱼的生产性能和健康状况，以及对鱼苗存活和生长性能的影响。试验在繁殖季节期间于孵化场进行，并在实验室继续进行以监测鱼苗和鱼种的生长性能。亲鱼被分为两组，（C）组投喂基础饲料，（H）组投喂0.4%的希利西斯。测定了血液和组织学参数、抗氧化能力、皮质醇水平以及一些免疫相关基因（如、和）和生长相关基因（和）的表达。所获得的鱼苗被细分为四种处理：（C-C）组投喂基础饲料，（C-H）组投喂0.4%的希利西斯，（H-C）组投喂基础饲料，（H-H）组投喂0.4%的希利西斯。结果显示，在亲鱼饲料中添加希利西斯可提高鱼苗产量、存活率、血液学参数和抗氧化能力。此外，它还改善了肠道微观结构并上调了免疫和生长相关基因。在所有添加希利西斯处理的组中，鱼苗和鱼种的生长指标均显著提高（<0.05）。（H-H）组的生长性能显著超过所有其他组。因此，膳食发酵酵母可作为维持罗非鱼生产的一种策略性解决方案。
