Effects of dietary soy lecithin phospholipid on survival, growth and resistance to diseases caused by Aeromonas hydrophila in hybrid lemon fin barb (Hypsibarbus wetmorei ♂× Barbonymus gonionotus ♀) larvae

IF 2.7 2区农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE

Animal Feed Science and Technology Pub Date : 2025-08-21 DOI:10.1016/j.anifeedsci.2025.116472

Rochana Weerasingha , Mohd Salleh Kamarudin , Murni Marlina Abd Karim , Mohammad Fadhil Syukri Ismail

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引用次数: 0

Abstract

A promising trend in utilizing hybrid carp species is shown in recent Asian aquaculture. The hybrid lemon fin barb is a cross-product of the silver barb (Barbonymus gonionotus, ♀) and lemon fin barb (Hypsibarbus wetmorei, ♂). As tasty wild lemon fin barb catches increased annually, the Department of Fisheries of Malaysia introduced this fast-growing and tasty hybrid fish species. The study aimed to determine the optimum dietary soy lecithin phospholipid requirement for larval hybrid lemon fin barb on growth, survival and resistance to diseases caused by Aeromonas hydrophila. Three-day-old larvae were stocked in 15 plastic tanks of 5 L at 50 larvae/ L. After the yolk sac absorption and mouth opening at around day three after hatching, five feed regimes with increasing soy lecithin phospholipid (SPL) levels of 0, 1, 2, 4 and 6 % were randomly allocated into fish tanks. After 20 days of the feeding trial, weight gain (WG) and protein efficiency ratio (PER) of hybrid lemon fin barb larvae fed 4 % SPL was significantly higher (p < 0.05) than those of larvae fed 0–2 % SPL. Feed conversion ratio (FCR) and specific growth rate (SGR) of hybrid larvae fed 4 % SPL were significantly (p < 0.05) lower and higher respectively than those of larvae fed soy lecithin-free diet. However, WG, PER, FCR and SGR were similar (p > 0.05) in hybrid lemon fin barb larvae fed 0–2 and 6 % SPL diets. The optimum dietary SPL requirement for the growth of larval hybrid lemon fin barb was determined at 4 % SPL. Lipid vacuoles appeared in the liver and gut of larvae fed excessive dietary phospholipids. Eicosapentaenoic acid, DHA and n3FA increased in the larval body (p < 0.05) at 2 % dietary SPL. During the challenge test against Aeromonas, post-larvae fed 4 % SPL diet performed good survival and histopathology compared to those fed 0 % SPL diet. The optimum dietary SPL level showed more health benefits in hybrid lemon fin barb larvae, especially against A. hydrophila.

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饲料中添加大豆卵磷脂对杂交柠檬鳍刺（Hypsibarbus wetmorei♂× Barbonymus gonionotus♀）幼虫存活、生长及对嗜水气单胞菌病抗性的影响

近年来亚洲水产养殖中出现了利用杂交鲤鱼的良好趋势。杂交柠檬鳍倒刺是银倒刺（Barbonymus gonionotus，♀）和柠檬鳍倒刺（Hypsibarbus wetmorei，♂）的交叉产物。随着美味的野生柠檬鳍倒刺渔获量逐年增加，马来西亚渔业部引进了这种快速生长且美味的杂交鱼类。本试验旨在确定杂交柠檬翅刺仔鱼饲料中大豆卵磷脂的最佳需要量对其生长、存活及对嗜水气单胞菌病的抗性的影响。将3日龄幼鱼以50条/ L的速度投喂于15个5 L的塑料罐中，孵化后第3天左右卵黄囊吸收开口后，随机分配5种饲料方案，分别增加0、1、2、4和6%的大豆卵磷脂（SPL）水平。饲喂20 d后，饲喂4% SPL的杂交柠檬翅刺幼虫增重（WG）和蛋白质效率（PER）显著高于饲喂0 ~ 2% SPL的杂交柠檬翅刺幼虫（p < 0.05）。饲粮中添加4% SPL的杂交幼虫的饲料系数（FCR）和特定生长率（SGR）分别显著（p < 0.05）低于和高于不添加大豆卵磷脂的幼虫。在0-2和6% SPL饲粮中，杂交柠檬翅刺幼虫的增重、PER、FCR和SGR差异无统计学意义（p > 0.05）。在4%的SPL水平下确定了杂交柠檬翅刺幼虫生长的最佳日粮SPL需要量。饲料中饲喂过量磷脂的幼虫肝脏和肠道中出现脂质空泡。饲粮SPL为2%时，幼体中二十碳五烯酸、DHA和n3FA含量显著增加（p < 0.05）。在对气单胞菌的攻毒试验中，饲喂4% SPL日粮的幼虫存活率和组织病理学表现优于饲喂0% SPL日粮的幼虫。饲粮最佳SPL水平对杂交柠檬翅刺幼虫具有更大的健康效益，尤其是对嗜水单翅刺幼虫。

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来源期刊

Animal Feed Science and Technology 农林科学-奶制品与动物科学

CiteScore

6.00

自引率

6.20%

发文量

266

审稿时长

3 months

期刊介绍： Animal Feed Science and Technology is a unique journal publishing scientific papers of international interest focusing on animal feeds and their feeding. Papers describing research on feed for ruminants and non-ruminants, including poultry, horses, companion animals and aquatic animals, are welcome. The journal covers the following areas: Nutritive value of feeds (e.g., assessment, improvement) Methods of conserving and processing feeds that affect their nutritional value Agronomic and climatic factors influencing the nutritive value of feeds Utilization of feeds and the improvement of such Metabolic, production, reproduction and health responses, as well as potential environmental impacts, of diet inputs and feed technologies (e.g., feeds, feed additives, feed components, mycotoxins) Mathematical models relating directly to animal-feed interactions Analytical and experimental methods for feed evaluation Environmental impacts of feed technologies in animal production.