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超热压力增强了基因改进的养殖鱼,Oreochromis niloticus幼虫的脂肪利用

S Akhila¹, Tincy Varghese¹, Narottam Prasad Sahu¹

¹Fish Nutrition, Biochemistry and Physiology Division, ICAR-Central Institute of Fisheries Education, Mumbai, India.

Comparative biochemistry and physiology. Part B, Biochemistry & molecular biology

|September 15, 2024

概括

高脂饮食 (12%) 对于在高温下基因改进的养殖鱼 (GIFT) 更好. 这些饮食优化了生长,提高了代谢效率,并保持了必需的脂肪酸,优于高蛋白质选择.

科学领域:

水产养殖营养水产养殖营养
鱼类生理学鱼类生理学
脂质代谢脂质代谢是什么

背景情况:

基因改进的养殖鱼 (GIFT) 是重要的水产养殖物种.
水温升高对鱼类生长和健康构成代谢挑战.
了解饮食能量来源偏好对于优化鱼养殖至关重要.

研究的目的:

为了确定饮食中的蛋白质或脂质是否更喜欢高温的礼物鱼.
评估不同蛋白质和脂质水平在热应激下对鱼生长和生理学的影响.
评估不同的饮食如何影响脂肪酸概况和与脂质代谢相关的基因表达.

主要方法:

一个为期60天的食试验,五种饮食的蛋白质 (34-38%) 和脂质 (8-12%) 在28.3°C和33.3°C之间有所不同.
评估生长参数,身体组成,血清脂质,酶活动和脂肪酸概况.
测量氧酶增殖器激活受体α (PPAR-α) 的mRNA表达作为脂解标记.

主要成果:

在高温下,P34L12饮食 (34%蛋白质,12%脂质) 显著提高了体重增加和热生长系数.
增加的饮食脂质减少了全身脂质沉积和调动血清脂质,同时增加了肌肉脂蛋白脂酶活性.
高脂饮食保留了必需脂肪酸 (EPA,DHA) 和PPAR-α表达的上调,表明脂质利用率提高,高热应激减少.

结论:

在高温下,高脂饮食 (12%) 在代谢上优于高蛋白饮食.
在高热条件下,饮食中的脂质水平会影响鱼的生长,脂质代谢和脂肪酸概况.
在热应激事件期间,优化食脂质含量对于提高代谢效率和保持水产养殖中的鱼类健康至关重要.

关键词:

能源来源能源来源能源来源高脂饮食高脂饮食是一种高脂饮食.这是一种PPAR-α.热应力是一种热应力.热弹性饮食热弹性饮食

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