A feeding trial was conducted to investigate the effects of different levels (0%, 16.67%, 33.33%, 50%, and 66.67%) of fish meal replacement by protein mixtures on the growth, body composition, and physiological metabolism of juvenile swimming crabs, Portunus trituberculatus. The results showed that the final body weight (FBW), weight gain rate (WGR), specific growth rate (SGR), intermolt duration (ID), and hepatosomatic index (HSI) initially increased and then decreased with increasing dietary fish meal replacement levels, and the highest FBW, WGR, and SGR values were found in crabs fed Diet 3. The crude protein content in the body significantly decreased, whereas the moisture and ash contents increased significantly with increasing fish meal replacement levels. The digestive enzyme activity of crabs was significantly affected by different levels of fish meal replacement with protein mixtures. The highest glutamic-oxaloacetic transaminase (GOT) and glutamic-pyruvic transaminase (GPT) levels in the hepatopancreas were detected in crabs fed Diet 5. The serum superoxide dismutase (SOD) activity increased significantly with increasing fish meal replacement levels. In conclusion, the results of this study indicated that the appropriate dietary fish meal replacement level is approximately 33% with no significant negative effects on the growth performance of juvenile P. trituberculatus.

进行了一项饲喂试验，以研究蛋白质混合物替代不同水平（0％，16.67％，33.33％，50％和66.67％）的鱼粉对幼年游蟹的生长，身体组成和生理代谢的影响，三疣梭子蟹。结果表明，随着饮食鱼粉替代水平的提高，最终体重（FBW），体重增加率（WGR），比生长率（SGR），蜕皮持续时间（ID）和肝体指数（HSI）开始升高，然后降低，在饲喂日粮3的螃蟹中，FBW，WGR和SGR值最高。随着鱼粉替代水平的提高，体内的粗蛋白含量显着下降，而水分和灰分含量则显着增加。不同水平的鱼粉替代蛋白质混合物对螃蟹的消化酶活性有显着影响。在饲喂日粮5的螃蟹中，肝胰腺中的谷氨酸-草酰乙酸转氨酶（GOT）和谷氨酸-丙酮酸转氨酶（GPT）最高。随着鱼粉替代水平的提高，血清超氧化物歧化酶（SOD）活性显着增加。总之，这项研究的结果表明，适当的膳食鱼粉替代水平约为33％，对少年的生长性能没有明显的负面影响P. trituberculatus。