A 60‐day feeding trial was conducted to evaluate the efficiency of the substitution of fishmeal (FM) with linseed protein concentrate (LPC) in the diet of silver catfish, Rhamdia quelen (6.13 g). Five isonitrogenous and isoenergetic experimental diets were formulated to replace 0, 10, 20, 30, or 40% of FM with LPC, and silver catfish were fed these diets to apparent satiation. LPC had a lower protein content compared to FM, but in vitro results showed higher protein digestibility of LPC as compared to fishmeal. There were no significant differences (p > .05) in growth, digestive somatic index, and intestinal quotient in the groups receiving LPC diets. The activity of the digestive enzymes did not differ among treatments, except for chymotrypsin, which was higher (p < .05) in the 30 and 40% LPC treatment groups. These results show that LPC protein can replace up to 40% of FM in silver catfish diets without adverse effects on growth performance.

中文翻译：

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亚麻籽浓缩蛋白可替代银cat鱼日粮中的鱼粉

进行了为期60天的喂养试验，以评估在银cat鱼Rhamdia quelen（6.13 g）的日粮中用亚麻籽浓缩蛋白（LPC）替代鱼粉（FM）的效率。配制了五种等氮和等能的实验饲料，用LPC代替0、10、20、30或40％的FM，银silver鱼被饲喂这些饲料，使他们明显饱食。与鱼粉相比，LPC的蛋白质含量较低，但体外结果显示LPC的蛋白质消化率更高。在 接受LPC饮食的组中，生长，消化体指数和肠商没有显着差异（p > .05）。消化酶的活性没有处理间不同，除了胰凝乳蛋白酶，这是较高的（p <0.05）在30％和40％的LPC治疗组中。这些结果表明，LPC蛋白可以替代silver鱼日粮中高达40％的FM，而对生长性能无不利影响。