文献类型：期刊文献

英文题名：Influence of different oil sources on growth, disease resistance, immune response and immune-related gene expression on the hybrid grouper (female Epinephelus fuscoguttatus x male E. lanceolatu), to Vibrio parahaemolyticus challenge

作者：Yan, Xiao-Bo[1,2];Dong, Xiao-Hui[1,2,3];Tan, Bei-Ping[1,2,3];Zhang, Shuang[1,2,3];Chi, Shu-Yan[1,2,3];Liu, Hong-Yu[1,2,3];Yang, Yuan-Zhi[1]

机构：[1]Guangdong Ocean Univ, Coll Fisheries, Lab Aquat Nutr & Feed, Zhanjiang 524088, Peoples R China;[2]Aquat Anim Precis Nutr & High Efficiency Feed Eng, Zhanjiang 524088, Peoples R China;[3]Minist Agr, Key Lab Aquat Livestock & Poultry Feed Sci & Tech, Zhanjiang 524000, Guangdong, Peoples R China

年份：2020

卷号：99

起止页码：310

外文期刊名：FISH & SHELLFISH IMMUNOLOGY

收录：SCI-EXPANDED(收录号：WOS:000523601500032)、、WOS

基金：This study was supported financially by National Natural Science Foundation of China (31972808), the Agriculture Research System of China (CARS-47) and "Chong yi liu (231419011)" project of Guangdong Ocean University.

语种：英文

外文关键词：Fatty acids; Fish oil; Growth performance; Immune; Vegetable oils

外文摘要：The aim of this study was to investigate the effects of feeding alternative dietary oils to hybrid grouper fish (female Epinephelus fuscoguttatus x male E. lanceolatu) on their growth, histological morphology of hepatocytes, disease resistance, immune response, and expression of immune-related genes. Seven experimental fish meal-based iso-nitrogenous and isolipidic diets were formulated containing 5% fish oil (FO; acting as controls) and various vegetable oils (VOs): corn oil (CO), sunflower oil (SO), tea oil (TO), olive oil (OO), rice oil (RO), and mixed oil (MO); comprising equal amounts of these oils). Each diet was fed to triplicate groups of 40 fish (initial mean body weight +/- standard error = 15.09 +/- 0.01 g) for eight weeks. The results show that 1) alternative dietary oils had no significant effects on weight gain rate, specific growth rate, protein efficiency ratio, and survival rate compared with controls (P > 0.05). The weight gain rate (WGR) and specific growth rate (SGR) of the SO group were lower than in the CO and OO groups. 2) These were no differences in morphological indexes among groups; except for the CO group, in which the condition factor and hepatosomatic index were lower than those in other groups. 3) Compared with controls, the whole-body moisture and crude protein contents in the VO groups were higher, while their crude lipid contents were lower. 4) The fatty acid contents in liver and muscle were affected by lipid type, and the contents of eicosapentaenoic acid and docosahexaenoic acid in liver and muscle in the VO groups were markedly lower than in controls. 5) Compared with control group, VO groups damaged the histological morphology of hepatocytes. 6) After a challenge with the Vibrio parahaemolyticus bacterium, there were no differences in mortality among groups. However, VO enhanced the activity of non-specific immune enzymes while downregulating the expression of Nrf2 and inducing the expression of pro-inflammatory factors (IL1 beta, TNF alpha, TLR22, and MyD88) in the kidney. It can be concluded that dietary VO substitution does not affect the growth of fish but damaged the histological morphology of hepatocytes and induced the expression of pro-inflammatory factors in tissues. Finally, OO and CO were recommended as the appropriate lipid replacement for FO.