Mansour Abdallah Tageldein, El-Feky Mohamed M M, El-Beltagi Hossam S, Sallam Ahmed Elsayed
Animal and fish Production Department, College of Agricultural and Food Sciences, King Faisal University, P.O. Box 420, Al-Ahsa 31982, Saudi Arabia.
Fish and Animal Production Department, Faculty of Agriculture (Saba Basha), Alexandria University, Alexandria 21531, Egypt.
Animals (Basel). 2020 Sep 12;10(9):1643. doi: 10.3390/ani10091643.
A 60-day feeding trial was conducted to assess the effects of dietary supplementation with bile salts (BS), lutein (LTN), and their combination on growth, survival, carotenoid content, and antioxidant status of rabbitfish () larvae. Fish were fed four isonitrogenous (34.39% protein) and isoenergetic (20.57 kJ/g) diets supplemented with BS (0.15 g kg), LTN (0.1 g kg), BS+LTN (0.15 and 0.1 g kg, respectively), and a non-supplemented control diet. The results revealed that fish fed BS+LTN had the highest significant specific growth rate (4.37% day), feed efficiency (46.55%), and survival (97.78%). Lutein supplementation improved whole-body protein content, meanwhile, fish fed a BS-supplemented diet had a higher lipid content. The carotenoid deposition was significantly increased with LTN and BS+LTN in skin, muscle, and whole body compared to the control and BS treatment. All dietary supplementation of BS and LTN showed significant improvement in total antioxidant capacity, catalase, and glutathione peroxidase activities. Additionally, LTN alone or BS+LTN significantly reduced malondialdehyde levels by 5.30 and 29.91%, respectively compared to the control. BS supplementation modulated aminopeptidases activities, triglycerides, cholesterol, and increased the activity of pancreatic lipase. Therefore, it could be inferred that dietary supplementation with LTN in combination with BS could improve the growth performance, carotenoid deposition, antioxidant status, lipid digestion, and metabolism of .
进行了一项为期60天的饲养试验，以评估日粮中添加胆汁盐（BS）、叶黄素（LTN）及其组合对尖吻鲈（）幼鱼生长、存活、类胡萝卜素含量和抗氧化状态的影响。给鱼投喂四种等氮（蛋白质含量34.39%）和等能（20.57 kJ/g）的日粮，分别添加BS（0.15 g/kg）、LTN（0.1 g/kg）、BS+LTN（分别为0.15和0.1 g/kg）以及一种不添加的对照日粮。结果显示，投喂BS+LTN的鱼具有最高的特定生长率（4.37%/天）、饲料效率（46.55%）和存活率（97.78%）。添加叶黄素提高了鱼体蛋白质含量，同时，投喂添加BS日粮的鱼脂肪含量更高。与对照和BS处理相比，LTN和BS+LTN处理的鱼皮肤、肌肉和鱼体中的类胡萝卜素沉积显著增加。所有添加BS和LTN的日粮处理均使总抗氧化能力、过氧化氢酶和谷胱甘肽过氧化物酶活性显著提高。此外，与对照相比，单独添加LTN或BS+LTN分别使丙二醛水平显著降低了5.30%和29.91%。添加BS调节了氨肽酶活性、甘油三酯、胆固醇，并提高了胰脂肪酶活性。因此，可以推断，日粮中同时添加LTN和BS可改善尖吻鲈的生长性能、类胡萝卜素沉积、抗氧化状态、脂肪消化和代谢。
