Vélez-Calabria Glenda, Tomás-Vidal Ana, Peñaranda David S, Jover-Cerdá Miguel, Llorens Silvia Martínez
Research Group of Aquaculture and Biodiversity, Institute of Animal Science and Technology, Universitat Politècnica de València, Camino de Vera 14, 46022 València, Spain.
Animals (Basel). 2023 Jan 5;13(2):205. doi: 10.3390/ani13020205.
The fishmeal replacement by vegetable meals or other alternative sources, without affecting fish performance and productivity, is one of the principal challenges in aquaculture. The use of hydrolyzed porcine mucosa (HPM) and nucleotide (NT) concentrates, as feed additives in gilthead seabream ( L.) non-fishmeal diets was assessed in order to determine the possible effects on growth, feed efficiency, protein digestion, and gut histology when these were included in a plant-based diet (HPM 1% and 2%, P1 and P2; NT 250 and 500 ppm, N250 and N500), in comparison with two control diets, AA0 (100% plant-protein-based diet) and FM100 (100% fishmeal-protein-based diet). Diets were assayed in triplicate and the growth assay lasted 134 days. Results showed a significant improvement in all groups in terms of final weight and specific growth rate in comparison with the AA0 group. An improvement in the feed conversion ratio and the protein efficiency ratio was also observed when the additives were included in lower percentages (P1 and N250) compared to the FM100 group. Significant differences were found in hepatosomatic index, villi thickness, and goblet cells. Thus, the inclusion of NT and HPM was tested as beneficial for the improvement of efficiency of plant feed in seabream.
在不影响鱼类生长性能和生产力的前提下，用植物性饲料或其他替代来源取代鱼粉是水产养殖面临的主要挑战之一。本研究评估了水解猪黏膜（HPM）和核苷酸（NT）浓缩物作为金头鲷无鱼粉饲料添加剂的效果，以确定当它们添加到植物性饲料中（HPM 1%和2%，分别为P1和P2；NT 250和500 ppm，分别为N250和N500）时，对生长、饲料效率、蛋白质消化率和肠道组织学的可能影响，并与两种对照饲料AA0（100%植物蛋白饲料）和FM100（100%鱼粉蛋白饲料）进行比较。饲料进行了三次重复试验，生长试验持续134天。结果表明，与AA0组相比，所有组的终末体重和特定生长率均有显著提高。与FM100组相比，当添加剂以较低比例（P1和N250）添加时，饲料转化率和蛋白质效率也有所提高。在肝体指数、绒毛厚度和杯状细胞方面发现了显著差异。因此，添加NT和HPM被证明有利于提高金头鲷植物性饲料的效率。
