Li Shengfu, Li Chengxuan, Wu Shengjun
Jiangsu Key Laboratory of Marine Bioresources and Environment, Jiangsu Ocean University, 59 Cangwu Road, Haizhou 222005, China; Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, 59 Cangwu Road, Haizhou 222005, China; School of Food Science and Engineering, Jiangsu Ocean University, 59 Cangwu Road, Haizhou 222005, China.
College of Pharmacy, Nanjing University of Chinese Medicine, 138, Xianlin Avenue, Xianlin University Town, Nanjing 210023, China.
Int J Biol Macromol. 2022 Sep 30;217:188-192. doi: 10.1016/j.ijbiomac.2022.07.074. Epub 2022 Jul 13.
This study investigated the effects of feeding different concentrations of chitosan on the growth performance, body composition and non-specific immune function of juvenile yellow catfish (Pelteobagrus fulvidraco). Four kinds of experimental diets were respectively prepared by adding 0 (control group), 5, 10 and 15 g/kg of chitosan to the basal feed and fed to juvenile yellow catfish for 8 weeks. Results show that the body weight gain rate, specific growth rate, survival rate, body protein content, serum superoxide dismutase activity, catalase activity, glutathione peroxidise activity, lysozyme activity and disease resistance ability against Aeromonas hydrophila of the experimental group with chitosan added to its diet were significantly higher than those of the control group optimally by 36.22 %, 14.37 %, 9.46 %, 8.97 %, 50.89 %, 33.15 %, 21.52 %, 40.80 %, 41.09 %, and 79.71 %, respectively (P < 0.05). No significant differences in feed efficiency among all groups (P > 0.05) were observed. The optimum dose of dietary chitosan required for the maximum growth of juvenile yellow catfish was 8.95 g/kg. Therefore, adding an appropriate amount of chitosan (8.95 g/kg) to the feed of yellow catfish can significantly improve its growth performance, ameliorate body composition and enhance its non-specific immunity.
本研究探讨了投喂不同浓度壳聚糖对幼龄黄颡鱼（Pelteobagrus fulvidraco）生长性能、体成分及非特异性免疫功能的影响。分别在基础饲料中添加0（对照组）、5、10和15 g/kg壳聚糖制备4种实验饲料，并投喂给幼龄黄颡鱼8周。结果显示，饲料中添加壳聚糖的实验组的体重增加率、特定生长率、存活率、体蛋白含量、血清超氧化物歧化酶活性、过氧化氢酶活性、谷胱甘肽过氧化物酶活性、溶菌酶活性以及对嗜水气单胞菌的抗病能力，分别比对照组显著提高了36.22%、14.37%、9.46%、8.97%、50.89%、33.15%、21.52%、40.80%、41.09%和79.71%（P<0.05）。各实验组间饲料效率无显著差异（P>0.05）。幼龄黄颡鱼实现最大生长所需的饲料壳聚糖最佳剂量为8.95 g/kg。因此，在黄颡鱼饲料中添加适量壳聚糖（8.95 g/kg）可显著提高其生长性能，改善体成分并增强其非特异性免疫力。
