Lumpfish (Cyclopterus lumpus) are widely applied as biological delousers in open net-pen farming of Atlantic salmon. As a species new to farming it is necessary to obtain a comprehensive understanding of the capacity of lumpfish to utilize plant derived feed ingredients. A feeding trial lasting for 54 days was conducted to investigate the effects of replacing fishmeal (FM) with a mix of soy protein concentrate (SPC) and pea protein concentrate (PPC) on growth, body chemical composition, and fast muscle fiber cellularity in juvenile lumpfish. Four isonitrogenous and isoenergetic diets (52 % crude protein and 14 % crude lipid) were formulated; a FM based diet was used as control (CTRL), and three experimental diets containing SPC and PPC (equal proportions of 1:1), replacing FM on weight basis at 25 % (PP25) 50 % (PP50) and 75 % (PP75). The fish grew from approximately 6.9 g to an average weight of 40.2 g in 54 days. Fish fed PP50 had significantly higher body weight, length and height compared to the other dietary groups. The whole body crude protein content of fish fed PP50 was significantly higher compared to the CTRL diet, while crude lipids were lower than those on CTRL and PP25 diets. Ash and dry matter did not differ among groups. Probability density functions showed no differences in fast muscle fiber size distributions amongst feeding groups. A higher percentage of smaller fibers in all feeding groups indicated hyperplasia was the dominant mechanism of muscle growth during the experimental period. These results suggest that a mixture of SPC and PPC can replace up to 50 % of FM in diets for juvenile lumpfish without any adverse effects on growth, chemical composition and fast muscle fiber cellularity.

ump鱼（Cyclopterus lumpus）广泛用作大西洋鲑鱼开放式网箱养殖中的生物诱食剂。作为养殖的新物种，有必要全面了解ump鱼利用植物衍生饲料成分的能力。进行了为期54天的喂养试验，以研究用大豆浓缩蛋白（SPC）和豌豆浓缩蛋白（PPC）的混合物代替鱼粉（FM）对青少年生长，身体化学成分和快速肌纤维细胞性的影响ump鱼。配制了四种等氮和等能日粮（52％的粗蛋白和14％的粗脂质）。使用基于FM的饮食作为对照（CTRL），并使用三种含SPC和PPC（等比例1：1）的实验饮食，以25％（PP25），50％（PP50）和75％（PP75）的重量代替FM ）。鱼从大约6只开始长出。9天到54天内平均重量为40.2克。与其他饮食组相比，喂食PP50的鱼的体重，长度和身高明显​​更高。与CTRL日粮相比，饲喂PP50的鱼的全身粗蛋白含量高得多，而粗脂肪却低于CTRL和PP25日粮。各组之间的灰分和干物质没有差异。概率密度函数显示喂养组之间快速肌肉纤维大小分布没有差异。在所有喂养组中较高比例的较小纤维表明，增生是实验期间肌肉生长的主要机制。这些结果表明，SPC和PPC的混合物可以替代幼年ump鱼日粮中高达FM的50％，而对生长，化学成分和快速肌纤维细胞性没有任何不利影响。