Abstract: Juvenile Hemibarbus maculatus weighting 5.90 g were stocked into 15 net cages of each 60 cm × 60 cm × 120 cm and fed diets containing 25.0%, 31.0%, 37.0%, 43.0% and 49. 0% crude protein at （22 ± 3） ℃ for 100 days. The results showed that the fish fed the diets containing 33.42% -38.79% protein had the maximal special growth rate （SGR）, and protein efficiency ratio （PER） and the minimal food conversion ratio（FCR） （P 〈 0. 05）. There were the maximal protein levels （from 53. 18% to 57.97% ） in the muscles in the fish fed the diets containing the protein levels varying from 25.0% to 37.0%. There were the maximal lipid levels （ from 14. 36% to 17.10% ） in the muscles in the fish fed the diets containing the protein rangingfrom 25.0% to 31.0%. However, the fish fed the diet containing 49. 0% protein had decrease in protein （54. 14% ） and lipid （ 15.37% ） levels in the muscles. The first increase and then decrease in activities of protease and lipase were observed in the fish fed the diets containing protein varying from 25.0% to 37.0% and 43.0%, respectively. There were no significant differences in the activities of amylase in the digestive tracts in the fish fed the diets containing different protein levels. It is recommended that 38.79% - 33.42% dietary protein be of optimum for juvenile and marketable Hemibarbus maculates.
王吉桥, 程爱香, 闫有利, 李文宽, 王丹, 闫彦春, 祁彩霞, 石峰. 饲料中蛋白质含量对花(鱼骨)生长和消化的影响[J]. 大连海洋大学学报, 2008, 23(2): 116-122.
WANG Ji-qiao, CHENG Ai-xiang, YAN You-li, LI Wen-kuan, WANG Dan, YAN Yan-chun , QI Cai-xia , SHI Feng. Effects of dietary protein levels on growth and digestibility in fish Hemibarbus maculatus. Journal of Dalian Ocean University, 2008, 23(2): 116-122.
2008, Vol. 23 
