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首页> 外文期刊>Aquaculture >Hydrolysed wheat gluten as part of a diet based on animal and plant proteins supports good growth performance of Asian seabass (Lates calcarifer), without impairing intestinal morphology or microbiota
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Hydrolysed wheat gluten as part of a diet based on animal and plant proteins supports good growth performance of Asian seabass (Lates calcarifer), without impairing intestinal morphology or microbiota

机译：作为基于动物和植物蛋白的饮食的一部分，水解小麦面筋在不损害肠道形态或微生物群的情况下支持亚洲鲈鱼（Lates calcarifer）的良好生长性能。

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A trial was conducted to determine the effect of 6% hydrolysed wheat gluten (HWG) inclusion in a low-fishmeal diet on growth performance and intestinal microbiota and morphology of Asian seabass (Lates calcarifer). Fish (initial average weight of 36.3 g) were allocated into floating cages (eight replicates per diet, 30 fish per cage). They were fed either a fishmeal-based diet (positive, diet code: POS; 36% fishmeal), or a diet based on a mix of animal and plant proteins (negative, diet code: NEG). The fishmeal inclusion rate in this diet was reduced to 6%, with the major protein sources being soybean meal and animal by-products. The third diet (diet code: HWG) was similar to the NEG diet with the exception that 6% HWG was included in replacement of the other proteins. At the end of the 48 day trial, fish were sampled for intestinal microbiology and histology. Growth parameters were also assessed. Final body weight, SGR and daily feed intake were not significantly different across diets. However, the feeding rate was significantly affected, with the lowest rate observed in the POS treatment and the highest with the NEG treatment. The FCR was significantly lower for both POS and HWG fed fish than for the NEG fed fish. High throughput sequencing revealed that the majority of reads derived from the mucosa samples belonged to members of Proteobacteria (70.3% of the reads), Cyanobacteria (10.0%) and Firmicutes (7.6%). In the digesta reads were mainly assigned to Proteobacteria (34.5%), Fusobacteria (34.5%), and Firmicutes (22.6%). The alpha diversity did not differ among dietary treatments. Some differences in OTU relative abundances were obtained between diets, however, the overall community was not modified to a large extent by HWG. Histological appraisal revealed that the HWG fed fish exhibited significantly higher posterior intestinal perimeter ratio than that of the POS treatment. Overall, including HWG in a low fishmeal diet positively affects feed efficiency. Concomitantly the absorptive surface area of the posterior intestine was improved while the intestinal microbiota, described comprehensively here for the first time in Asian seabass, was similar to the microbiota of other healthy carnivorous marine fish species. The mechanisms involved in these changes may be related to the high glutamine content and to the high protein digestibility of HWG.
机译：进行了一项试验，以确定低鱼粉饮食中所含的6％水解小麦面筋（HWG）对亚洲鲈鱼（Lates calcarifer）的生长性能，肠道菌群和形态的影响。将鱼（初始平均重量为36.3 g）分配到浮动网箱中（每个日粮8个重复，每个网箱30条鱼）。给他们喂以鱼粉为基础的饮食（正，饮食代号：POS; 36％鱼粉）或基于动植物蛋白混合的饮食（负，饮食代号：NEG）。这种饮食中的鱼粉含量降低到6％，主要的蛋白质来源是豆粕和动物副产品。第三种饮食（饮食代码：HWG）与NEG饮食相似，不同之处在于，其他蛋白质的替代品中包含6％的HWG。在48天试验结束时，对鱼进行了肠道微生物学和组织学采样。还评估了生长参数。不同饮食的最终体重，SGR和每日饲料摄入量无显着差异。但是，进食速度受到显着影响，在POS处理中观察到最低的发生率，在NEG处理中观察到最高的发生率。 POS和HWG饲喂鱼的FCR均显着低于NEG饲喂鱼。高通量测序显示，来自粘膜样品的大多数读物属于变形细菌（占读物的70.3％），蓝细菌（10.0％）和硬毛菌（7.6％）的成员。在消化液中，读物主要分配给Proteobacteria（34.5％），Fusobacteria（34.5％）和Firmicutes（22.6％）。饮食疗法之间的阿尔法多样性没有差异。饮食之间在OTU相对丰度方面存在一些差异，但是，HWG并未对整个社区进行很大程度的修改。组织学评估显示，HWG饲喂的鱼的后肠周长比明显比POS处理高。总体而言，在低鱼粉饮食中加入HWG会对饲料效率产生积极影响。随之而来的是，后肠道的吸收表面积得到了改善，而这里在亚洲鲈鱼中首次全面描述的肠道菌群与其他健康的肉食性海鱼物种的菌群相似。这些变化涉及的机制可能与HWG的高谷氨酰胺含量和高蛋白消化率有关。

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