This study was conducted with the objective of evaluating the combination of different ratios of soluble and insoluble linseed fibre for silver catfish (Rhamdia quelen). For this, the soluble and insoluble fractions were concentrated separately and combined in four ratios (1:0.5, 1:1, 1:2, 1:4), which were added to silver catfish diets and evaluated in a bioassay. After 45 days of receiving the experimental diets, the animals were submitted to biometry to collect data and tissues. The experimental design was completely randomized, with five treatments and four replications and the means were compared by Tukey's test (p < .05). Diets 1:2 and 1:4 provided higher weight gain, specific growth rate and crude protein deposition to the fish, whereas only the 1:4 diet reflected higher crude body protein. The 1:0.5 diet altered the trypsin activity in the intestine, and, together with the 1:4 diet, it provided a higher intestinal villi height. Body yield, somatic and digestive parameters, chymotrypsin activity and glucose, glycogen and liver protein were not altered, regardless of the experimental diets. In conclusion, the results indicate that linseed fibre acts effectively as a growth promoter in silver catfish diets, with the use of 1:2 and 1:4 ratios optimizing its prebiotic action.

中文翻译：

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功能性亚麻籽纤维及其对silver鱼营养的影响

进行这项研究的目的是评估银cat鱼（Rhamdia quelen）不同比例的可溶性和不溶性亚麻籽纤维的组合。为此，将可溶性部分和不溶性部分分别浓缩，并以四种比例（1：0.5、1：1、1：2、1：4）合并，然后将其添加到silver鱼银饲料中，并进行生物测定。接受实验饮食45天后，对动物进行生物测定以收集数据和组织。实验设计是完全随机的，进行了5种处理和4次重复，并用Tukey检验比较了方法（p <.05）。1：2和1：4日粮为鱼类提供了更高的增重，特定生长率和粗蛋白沉积，而只有1：4日粮反映了较高的粗蛋白。1：0.5饮食改变了肠中的胰蛋白酶活性，并与1：4饮食一起提供了更高的肠绒毛高度。不管实验饮食如何，人体产量，体细胞和消化参数，胰凝乳蛋白酶活性以及葡萄糖，糖原和肝蛋白都没有改变。总之，结果表明，亚麻籽纤维在银cat鱼日粮中可有效地充当生长促进剂，使用1：2和1：4的比例可优化其益生元作用。