Jiang Jun, Feng Lin, Tang Ling, Liu Yang, Jiang Weidan, Zhou Xiaoqiu
College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China.
Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China.
Anim Nutr. 2015 Dec;1(4):373-377. doi: 10.1016/j.aninu.2015.12.006. Epub 2016 Jan 9.
The present study investigated the effect of body weight on body composition, digestive and absorptive capacity, transaminase activities in hepatopancreas and muscle, and plasma ammonia concentration of Jian carp ( var. ). A total of 750 Jian carps (18.0 ± 0.2 g) were randomly distributed into five groups with three replicates and fed the same diet for 56 days. Tissue and plasma samples were collected on days 14, 28, 42, and 56. The results were used to develop a mathematical model for specific growth rate, body moisture and fat content, aspartate transaminase activity and alanine aminotransferase activity in hepatopancreas and muscle, plasma ammonia concentration, and trypsin, chymotrypsin, lipase, and amylase activities in hepatopancreas and intestine, activities of creatine kinase, Na/K-ATPase, alkaline phosphatase, and γ-glutamyl transpeptidase in intestine in Jian carp. There were linear relationships between natural logarithms of above indexes and body weight. The body moisture and fat content, digestive and absorptive enzymes activities, and transaminase activities showed negative allometry against body weight of Jian carp which were partial reasons to explain fish growth rate decreasing.
本研究调查了体重对建鲤（品种）的体组成、消化吸收能力、肝胰腺和肌肉中转氨酶活性以及血浆氨浓度的影响。总共750尾建鲤（18.0 ± 0.2克）被随机分为五组，每组三个重复，投喂相同饲料56天。在第14、28、42和56天采集组织和血浆样本。结果用于建立建鲤特定生长率、体水分和脂肪含量、肝胰腺和肌肉中天冬氨酸转氨酶活性和丙氨酸转氨酶活性、血浆氨浓度以及肝胰腺和肠道中胰蛋白酶、糜蛋白酶、脂肪酶和淀粉酶活性、肠道中肌酸激酶、钠/钾-ATP酶、碱性磷酸酶和γ-谷氨酰转肽酶活性的数学模型。上述指标的自然对数与体重之间存在线性关系。建鲤的体水分和脂肪含量、消化吸收酶活性以及转氨酶活性相对于体重呈负异速生长，这是解释鱼类生长速率下降的部分原因。
