Abstract Vegetable oils (VO) that are used to substitute fish oil in aquafeeds may affect, not only the fatty acid composition, but also lipid metabolism and distribution. The present study was designed to investigate this issue in juvenile golden pompano Trachinotus ovatus fed eight diets formulated with typical VO with widely varying fatty acid compositions including coconut oil (CO), palm oil (PO), oil-tea camellia seed oil (OTO), olive oil (OO), canola oil (CNO), peanut oil (PNO), linseed oil (LO) and perilla oil (PFO), in comparison with fish fed fish oil (FO). After the 8-week feeding trial, fish fed the CO diet had the highest growth performance, and higher general antioxidant capacities in serum and liver than in fish fed the other VO. The crude lipid content in whole body and expression levels of fas were lower in fish fed the FO, PFO and LO diets, while lipid contents and expression levels of scd were higher in fish fed the OTO and PNO diets. Other than fish fed the PFO diet, the total lipid contents of liver in other fish fed the other VO diets were higher than that in fish fed the FO diet, with the highest contents in fish fed the OTO and OO diets. The expression levels of genes involved in fatty acid catabolism and transport, namely pparα, cpt1 and apoB100, were higher in fish fed diet PFO than in fish fed the other diets. Comparing the fatty acid compositions of tissues and diets showed that 18:1n-9, 18:3n-3 (ALA) and 22:6n-3 (DHA) were preferentially deposited in tissues of pompano, with DHA preferentially deposited in polar lipids rather than neutral lipids. However, excessive dietary ALA in PFO did not lead to increased deposition of ALA, but increased liver lipid content. The present study showed that dietary lipid sources had significant influences on growth performance and antioxidant capacity, as well as on lipid deposition. Low dietary 18:1n-9, high n-3 long-chain polyunsaturated fatty acids and an appropriate ratio of ALA/LNA (18,2n-6) could reduce lipid deposition in pompano tissues, especially liver.

中文翻译：

---

不同日粮油源对卵形金鲳幼鱼生长性能、抗氧化能力及脂质沉积的影响

摘要 用于替代水产饲料中鱼油的植物油 (VO) 不仅会影响脂肪酸组成，还会影响脂质代谢和分布。本研究旨在研究用八种典型 VO 配制的日粮对幼年金鲳鱼的这一问题，其中脂肪酸成分包括椰子油 (CO)、棕榈油 (PO)、油茶油茶籽油 (OTO) 、橄榄油 (O​​O)、菜籽油 (CNO)、花生油 (PNO)、亚麻籽油 (LO) 和紫苏油 (PFO)，与鱼饲鱼油 (FO) 相比。在 8 周的饲养试验后，与饲喂其他 VO 的鱼相比，饲喂 CO 饲料的鱼的生长性能最高，血清和肝脏的一般抗氧化能力更高。饲喂FO的鱼全身粗脂肪含量和fas表达水平较低，PFO 和 LO 饮食，而在喂食 OTO 和 PNO 饮食的鱼中，脂质含量和 scd 的表达水平更高。除饲喂 PFO 饲料的鱼外，饲喂其他 VO 饲料的其他鱼的肝脏总脂质含量高于饲喂 FO 饲料的鱼，其中饲喂 OTO 和 OO 饲料的鱼的肝脏总脂质含量最高。参与脂肪酸分解代谢和运输的基因，即 pparα、cpt1 和 apoB100 的表达水平在喂食 PFO 的鱼中高于喂食其他饮食的鱼。比较组织和日粮的脂肪酸组成表明，18:1n-9、18:3n-3（ALA）和22:6n-3（DHA）优先沉积在pompano组织中，而DHA优先沉积在极性脂质中而不是比中性脂质。然而，PFO 中过量的膳食 ALA 并未导致 ALA 沉积增加，但肝脏脂质含量增加。本研究表明，膳食脂质来源对生长性能和抗氧化能力以及脂质沉积有显着影响。低膳食 18:1n-9、高 n-3 长链多不饱和脂肪酸和适当比例的 ALA/LNA (18,2n-6) 可以减少庞巴诺组织中的脂质沉积，尤其是肝脏。