Effect of a Guar Meal Protein Concentrate in Replacement of Conventional Feedstuffs on Productive Performances and Gut Health of Rainbow Trout (Oncorhynchus mykiss)

IF 2.1 3区农林科学 Q2 FISHERIES

Fishes Pub Date : 2024-07-25 DOI:10.3390/fishes9080295

Alessandra Roncarati, L. Galosi, Alessandro Di Cerbo, Martina Quagliardi, Francesco Marchetti, Elisa Fiordelmondo, Francesca Mariotti, G. Magi

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Abstract

A trial was performed to investigate the effect of a proprietary guar protein concentrate, as a partial replacement of conventional protein sources, on the productive performances of rainbow trout through the growing phase. A total of 2700 rainbow trout were reared in 3 m3, 12 concrete tanks for 90 days. Three diets were formulated to contain a protein level of 43% and a lipid content of 25.3% by replacing 0% (CD), 5% (D5), and 15% (D15) of conventional protein sources with guar protein concentrate. The final mean weight was similar between D5 and CD, significantly higher than D15. The same trend was observed in weight gain and specific growth rate. The feed conversion rate had the most favourable performances in D5 and CD. Feed palatability was higher in CD and D5 than in D15. Histological intestinal score showed significant differences (p < 0.05) between the groups with the highest values in CD and the lowest in D15. Significant differences were observed for goblet cell hyperplasia with higher values in the CD group. Based on this trial, the 5% guar protein concentrate inclusion gave the best zootechnical results.

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瓜尔豆浓缩蛋白替代传统饲料对虹鳟鱼（Oncorhynchus mykiss）生产性能和肠道健康的影响

我们进行了一项试验，以研究瓜尔豆浓缩蛋白作为传统蛋白质来源的部分替代品，对虹鳟鱼整个生长阶段生产性能的影响。共有 2700 尾虹鳟鱼在 3 立方米、12 个水泥池中饲养了 90 天。通过用瓜尔豆浓缩蛋白替代 0%（CD）、5%（D5）和 15%（D15）的传统蛋白质来源，配制了三种日粮，蛋白质含量为 43%，脂质含量为 25.3%。D5 和 CD 的最终平均体重相似，但明显高于 D15。在增重和特定生长率方面也观察到相同的趋势。D5 和 CD 的饲料转化率表现最好。CD 和 D5 的饲料适口性高于 D15。肠道组织学评分在各组之间存在显著差异（p < 0.05），其中 CD 组最高，D15 组最低。在小泡细胞增生方面观察到显著差异，CD 组的数值较高。根据这项试验，添加 5%瓜儿胶蛋白浓缩物的饲料在动物营养学方面效果最佳。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Fishes Multiple-

CiteScore

1.90

自引率

8.70%

发文量

311

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