Kvingedal Renate, Vigen Jannicke, Nanton Dominic, Ruohonen Kari, Kaur Kiranpreet
Cargill Aqua Nutrition, 4335 Dirdal, Norway.
Aker BioMarine Antarctic ASA, 1366 Lysaker, Norway.
Animals (Basel). 2023 Feb 24;13(5):835. doi: 10.3390/ani13050835.
Growth and histological parameters were evaluated in Atlantic salmon (74 g) that were fed alternative phospholipid (PL) sources in freshwater (FW) up to 158 g and were transferred to a common seawater (SW) tank with crowding stress after being fed the same commercial diet up to 787 g. There were six test diets in the FW phase: three diets with different doses of krill meal (4%, 8%, and 12%), a diet with soy lecithin, a diet with marine PL (from fishmeal), and a control diet. The fish were fed a common commercial feed in the SW phase. The 12% KM diet was compared against the 2.7% fluid soy lecithin and 4.2% marine PL diets, which were formulated to provide the same level of added 1.3% PL in the diet similar to base diets with 10% fishmeal in the FW period. A trend for increased weight gain with high variability was associated with an increased KM dose in the FW period but not during the whole trial, whereas the 2.7% soy lecithin diet tended to decrease growth during the whole trial. A trend for decreased hepatosomatic index (HSI) was associated with an increased KM dose during transfer but not during the whole trial. The soy lecithin and marine PL diets showed similar HSI in relation to the control diet during the whole trial. No major differences were observed in liver histology between the control, 12% KM, soy lecithin, and marine PL diets during transfer. However, a minor positive trend in gill health (lamella inflammation and hyperplasia histology scores) was associated with the 12% KM and control diets versus the soy lecithin and marine PL diets during transfer.
对大西洋鲑鱼（74克）的生长和组织学参数进行了评估。这些鲑鱼在淡水中投喂替代磷脂（PL）来源的饲料直至体重达到158克，之后在投喂相同商业饲料直至体重达到787克后，转移至拥挤胁迫的普通海水（SW）养殖池中。淡水阶段有六种试验饲料：三种不同磷虾粉剂量（4%、8%和12%）的饲料、一种大豆卵磷脂饲料、一种海洋PL（来自鱼粉）饲料和一种对照饲料。海水阶段给鱼投喂普通商业饲料。将12%磷虾粉饲料与2.7%液体大豆卵磷脂和4.2%海洋PL饲料进行比较，这两种饲料的配方旨在提供与淡水期含10%鱼粉的基础饲料相同水平的1.3%添加PL。淡水期体重增加呈上升趋势但变异性高，这与磷虾粉剂量增加有关，但在整个试验期间并非如此，而2.7%大豆卵磷脂饲料在整个试验期间往往会降低生长速度。肝体指数（HSI）下降趋势与转移期间磷虾粉剂量增加有关，但在整个试验期间并非如此。在整个试验期间，大豆卵磷脂和海洋PL饲料与对照饲料相比，HSI相似。转移期间，对照、12%磷虾粉、大豆卵磷脂和海洋PL饲料之间的肝脏组织学未观察到重大差异。然而，在转移期间，鳃健康（鳃小片炎症和增生组织学评分）方面有一个轻微的积极趋势，即12%磷虾粉和对照饲料优于大豆卵磷脂和海洋PL饲料。
