Partial replacement of fish oil by soybean oil on lipid distribution and liver histology in European sea bass (Dicentrarchus labrax) and rainbow trout (Oncorhynchus mykiss) juveniles
Partial replacement of fish oil by soybean oil on lipid distribution and liver histology in European sea bass (Dicentrarchus labrax) and rainbow trout (Oncorhynchus mykiss) juveniles
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DOI：
10.1111/j.1365-2095.2004.00337.x
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发表时间：
2005-04-01
影响因子：
3.5
通讯作者：
Valente, LMP
中科院分区：
文献类型：
--
作者：
Figueiredo-Silva, A;Rocha, E;Valente, LMP
进行了为期12周的饲养试验，以评估大豆油替代鱼油对两种重要的商业鱼类：虹鳟鱼（Oncorhynchus mykiss）和欧洲鲈鱼（Dicentrarchus labrax）的脂质分布和肝脏组织学的影响。海鲈鱼（16.2 +/- 0.5 g;平均值+/- SD）和虹鳟鱼（52.1 +/- 0.5 g）幼鱼喂食三种等氮（500 g kg（-1）CP）和等能（19 kJ g（-1））饲料中的一种，其中含有0%（对照，饲料A），25%（饲料B）和50%（饲料C）大豆油。在实验结束时，评价肌肉、肝脏和内脏中的脂质沉积。还测定了血浆中的胆固醇和甘油三酯水平。组织总的，中性和极性脂质组成（克千克（-1）总脂质）没有显着差异的物种，无论饮食治疗。血浆参数也有相同的变化趋势（P > 0.05）。内脏是脂肪沉积的首选组织，鳟鱼和鲈鱼的总脂肪含量分别为252-276和469-513 g kg（-1）。膳食鱼油替代对观察到的肝脏切片中肝脂滴积聚或空泡化程度和模式均无影响。这些数据表明，无论是海鲈鱼和鳟鱼可以喂饮食含有高达50%的大豆油没有不良影响的组织脂质成分或肝脏组织学。
A 12-week feeding trial was conducted to evaluate the effects of fish oil replacement by soybean oil, on lipid distribution and liver histology of two commercially important finfish species: rainbow trout (Oncorhynchus mykiss) and European sea bass (Dicentrarchus labrax). Sea bass (16.2 +/- 0.5 g; mean +/- SD) and rainbow trout (52.1 +/- 0.5 g) juveniles were fed one of three isonitrogenous (500 g kg(-1) CP) and isoenergetic (19 kJ g(-1)) diets, containing 0% (control, diet A), 25% (diet B) and 50% (diet C) soybean oil. At the end of the experiment, lipid deposition was evaluated in muscle, liver and viscera. Cholesterol and triglycerides levels were also determined in plasma. Tissue total, neutral and polar lipid composition (g kg(-1) total lipids) showed no significant differences within species, regardless the dietary treatment. The same trend was observed for plasma parameters (P > 0.05). Viscera were the preferential tissue of lipid deposition, with 252-276 and 469-513 g kg(-1) total lipid content in trout and sea bass, respectively. Dietary fish oil replacement had no effect on either hepatic lipid droplets accumulation or degree and pattern of vacuolization in the observed liver sections. These data suggest that both sea bass and trout can be fed diets containing up to 50% soybean oil without adverse effects on tissue lipid composition or liver histology.