Twibell R G, Watkins B A, Brown P B
Department of Forestry and Natural Resources, Purdue University, West Lafayette, IN 47907-1159, USA.
J Nutr. 2001 Sep;131(9):2322-8. doi: 10.1093/jn/131.9.2322.
A study was conducted to examine the effects of dietary conjugated linoleic acids (CLA; 0, 0.5 or 1.0 g/100 g total CLA) and lipid source (menhaden oil, soybean oil or a 1:1 mixture of menhaden:soybean oil) on growth rates and fatty acid composition of yellow perch. Dietary treatments were fed to apparent satiation to triplicate groups of fish initially weighing 37.9 g/fish. At the end of the 9-wk feeding trial, no significant differences were detected in weight gain or feed intake among fish fed any of the dietary treatments. Dietary CLA, lipid source and/or their interaction significantly affected feed efficiency, total liver lipid concentration, and muscle and liver fatty acid concentrations. Feed efficiency (g gain/g feed) was significantly lower in fish fed diets containing soybean oil (0.51) compared with fish fed menhaden oil (0.58) or menhaden:soybean oil (0.60). Liver total lipid concentrations were significantly reduced in fish fed 0.5 and 1.0 g/100 g CLA compared with fish fed the diets containing no CLA and in fish fed menhaden oil compared with those fed soybean oil or a 1:1 mixture of menhaden:soybean oil. Total CLA levels increased in both liver and muscle as dietary CLA concentration increased, irrespective of lipid source. However, total CLA concentrations were significantly lower in liver and muscle of fish fed soybean oil. Total muscle CLA concentrations were 0, 1.26 and 2.92 g/100 g fatty acids in fish fed diets containing menhaden oil and 0, 0.5 and 1.0 g/100 g CLA, respectively. Mono- and polyunsaturated fatty acid (PUFA) concentrations were significantly lower in muscle and liver of fish fed CLA compared with fish fed the diets containing no CLA. In contrast, liver concentrations of saturated fatty acids, 14:0, 16:0 and 18:0, were significantly higher in fish fed 1.0 g/100 g CLA.
进行了一项研究，以考察日粮中共轭亚油酸（CLA；0、0.5或1.0克/100克总CLA）和脂质来源（鲱鱼油、大豆油或鲱鱼：大豆油1:1混合物）对黄鲈生长率和脂肪酸组成的影响。将日粮处理投喂至明显饱足状态，投喂给初始体重为37.9克/尾的三组重复鱼。在为期9周的投喂试验结束时，在投喂任何日粮处理的鱼之间，未检测到体重增加或采食量有显著差异。日粮CLA、脂质来源和/或它们的相互作用显著影响饲料效率、肝脏总脂质浓度以及肌肉和肝脏脂肪酸浓度。与投喂鲱鱼油（0.58）或鲱鱼：大豆油（0.60）的鱼相比，投喂含大豆油日粮（0.51）的鱼的饲料效率（增重克数/饲料克数）显著更低。与投喂不含CLA日粮的鱼相比，以及与投喂大豆油或鲱鱼：大豆油1:1混合物的鱼相比，投喂0.5和1.0克/100克CLA的鱼的肝脏总脂质浓度显著降低。随着日粮CLA浓度增加，肝脏和肌肉中的总CLA水平均升高，与脂质来源无关。然而，投喂大豆油的鱼的肝脏和肌肉中的总CLA浓度显著更低。在投喂含鲱鱼油日粮且分别含有0、0.5和1.0克/100克CLA的鱼中，肌肉总CLA浓度分别为0、1.26和2.92克/100克脂肪酸。与投喂不含CLA日粮的鱼相比，投喂CLA的鱼的肌肉和肝脏中的单不饱和脂肪酸和多不饱和脂肪酸（PUFA）浓度显著更低。相反，投喂1.0克/100克CLA的鱼的肝脏中饱和脂肪酸14:0、16:0和18:0的浓度显著更高。
