1. 中国水产科学研究院 黑龙江水产研究所, 黑龙江 哈尔滨 150070;
2. 东北农业大学 动物科技学院水产系, 黑龙江 哈尔滨 150030;
3. 中国海洋大学 教育部海水养殖重点实验室, 农业部水产动物营养与饲料重点实验室, 山东 青岛 266003;
4. 西藏自治区农牧科学院 水产科学研究所, 西藏 拉萨 850032
徐革锋,副研究员,在读博士.E-mail:xgffish@hotmail.com
S96
“十二五”国家科技计划项目（2012BAD25B10）.
1. Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin 150070, China;
2. College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China;
3. The Key Laboratory of Aquaculture Nutritionand Feeds, Ministry of Agriculture;The Key Laboratory of Mariculture, Ministry of Education;Ocean University of China, Qingdao 266003, China;
4. Institute of Fishery Sciences, Tibet Academy of Agricultural and Animal Husbandry Sciences, Lhasa 850032, China
本研究旨在探讨不同蛋白质和脂肪水平对细鳞鲑（）幼鱼生长、体成分以及肌肉氨基酸含量的影响。采用蛋白质水平为40%、45%、50%和55%，脂肪水平为8%和16%，共8组实验饲料。在水温为（16±0.2）℃的循环流水水族箱系统内进行为期10周的养殖试验。采用常规生化分析方法对该鱼肌肉营养学组成及含量进行测定分析。研究结果表明，不同蛋白和脂肪水平对细鳞鲑幼鱼增重率、特定生长率、肥满度和肝体比等均有显著影响（<0.05），而对粗脂肪和粗灰分不存在显著影响；随着脂肪水平增加，其肌肉粗脂肪含量也随之显著提高（TAA）和必需氨基酸的构成比例（）不存在显著影响。综合生长性能与氨基酸模式的实验结果，本研究认为细鳞鲑幼鱼最适蛋白质和脂肪水平分别为50%和8%，适宜蛋能比为29.36 g/MJ。
The lenok (Pallas) is one of the most important salmonid fish in northeast China. To date, no information on the optimal dietary protein and lipid levels of this species has been reported. A 10-week feeding trial with four dietary protein levels (40%, 45%, 50% and 55% crude protein) and two dietary lipid levels (8% and 16% crude lipid) was conducted to assess the dietary protein and lipid levels for the growth and of amino acids of juvenile lenok. The results showed that weight gain (WG), specific growth rate (SGR), condition factor (CF) and hepatosomatic index (HSI) were significantly affected by dietary protein and lipid levels (<0.05), and there were also significant interactions between these two factors (<0.05). WG, SGR, CF and HIS rose with increasing dietary protein levels at each lipid level, and decreased after that. The growth of fish fed the high-lipid level diet was significantly higher (<0.05) than that of fish fed the low-lipid level diet at 40% and 45% protein diet, whereas these values showed an opposite trend at 50% and 55% protein diet. Fish fed diets with low protein levels had the lowest survival levels of all groups. The lipid content of muscle increased significantly with increasing lipid levels (<0.05), while moisture, crude protein and ash content were not affected by dietary lipid level. The protein content of muscle increased significantly with increasing protein levels (<0.05), while lipid and ash content were not affected by dietary protein level. The lipid content of fish fed high-lipid level diets was significantly higher than that of fish fed lower-lipid level diets at each protein level. The protein content of fish fed diets 55P/8L and 55P/16L was significantly higher than that of fish fed in other groups. Seventeen amino acids were found in the muscle of fish. The percentages of total amino acids and the ratios of essential amino acids:total amino acids showed no significant difference among the treatments (>0.05). The content of the different amino acids was stable and the constitutional rate of the EAAs met Food and Agriculture Organization and World Health Organization standards. The results indicated that the optimum protein and lipid levels for the lenok were 50% and 8%, respectively; and the optimum protein:energy ratio for this species was 29.36 g/MJ.
徐革锋,刘洋,郝其睿,王玉裕,牟振波.不同蛋白质和脂肪水平对细鳞鲑幼鱼生长和肌肉氨基酸含量的影响[J].中国水产科学,2016,23(6):1311-1319
XU Gefeng, LIU Yang, HAO Qirui, WANG Yuyu, MOU Zhenbo. Effects of dietary protein and lipid levels on growth and amino acids in muscle of juvenile lenok, Brachymystax lenok (Pallas)[J]. Journal of Fishery Sciences of China,2016,23(6):1311-1319
