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在尼罗河鱼中,可消化的粉和非粉多糖的能量利用效率

B K Dey¹, M C J Verdegem², M A J Nederlof²

¹Aquaculture Biology and Fisheries Ecology, Building 122, Wageningen University, Wageningen 6700 AH, the Netherlands; Aquatic Food Biosciences, WorldFish, House No. 3, Road No. 13, Gulshan-1, Dhaka 1212, Bangladesh.

Animal : an international journal of animal bioscience

|November 28, 2025

概括

饮食中的非粉多糖 (NSP) 会对尼罗河鱼的生长和料转化产生负面影响. 虽然可消化的NSP提供最小的能量贡献 (5%),但精确的能量评估需要在鱼料中单独评估粉和NSP利用率.

科学领域:

水产养殖是水产养殖的一种方式.
动物营养动物营养
鱼类生理学鱼类生理学

背景情况:

越来越多地使用植物性成分增加了鱼料中的食非粉多糖 (NSP).
鱼 (Oreochromis niloticus) 具有有限的内源性NSP消化酶,但可以通过微生物发酵利用NSP.
了解NSP利用效率对于优化鱼生长和料配方至关重要.

研究的目的:

评估消化的NSP和粉对尼罗河鱼生长的利用效率.
确定可消化的NSP对能量保留的贡献,并将其与可消化的粉进行比较.
评估饮食NSP对鱼的能量利用和维护要求的影响.

主要方法:

制定了四种与粉和NSP水平形成对比的实验性饮食,使用蒸机干谷物与可溶剂和脱油大米作为NSP来源的混合物.
在一个循环水产养殖系统中为尼罗河鱼 (45g) 食7周在30°C的温度下.
分析了体重增加,料转换比率,能量保留,并计算了可消化的能量需求,以保持可消化的粉和NSP的维护和利用效率.

主要成果:

饮食NSP补充剂显著减少体重增加和恶化料转换率.
补充NSP的饮食降低了能量保留效率,增加了维护能源需求.
可消化粉和可消化NSP的能量利用效率分别为73%和5%.

结论:

可消化的NSP对尼罗河鱼的能量增加做出了微不足道的贡献.
单独估计粉和NSP利用量对于准确评估鱼饮食中的能量,特别是那些高含NSP的食物,至关重要.
优化料配方需要对鱼如何利用不同的碳水化合物来源有细微的了解.

关键词:

生物能源学生物能源学可消化能源可以消化能源.能源评估能源评估能源净值是指能源净值.色色素尼洛蒂库斯 (Oreochromis niloticus) 是一种色的植物.

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