孕期晚期母羊能量代谢的动态反应:一个元回归
M Plante-Dubé1, M P Létourneau-Montminy1, F Castonguay1
1Département des sciences animales, Université Laval, Pavillon Paul-Comtois, 2425 rue de l'Agriculture, Québec, QC G1V 0A6, Canada.
Animal : an international journal of animal bioscience
|November 18, 2025
概括
这一元分析显示,孕母羊的能量摄入不足,特别是有较大的子,显著影响葡萄糖和β-基酸盐水平. 饮食能量水平和 litter 尺寸极大地影响母羊在怀孕晚期的代谢状态.
科学领域:
- 动物科学动物科学
- 生殖生物学 生殖生物学
- 代谢生理学 代谢生理学
背景情况:
- 孕期晚期母羊的负能量平衡是由于能量摄入不足造成的,导致低血糖和超血.
- 之前的研究重点是葡萄糖,NEFA和BHB等单个代谢物,但对它们的动力学与能量摄入量和 litter 尺寸相关的全面分析缺乏.
研究的目的:
- 在孕期晚期的母羊中对能量代谢物的动力学进行元分析.
- 调查饮食能量水平和 litter 尺寸对母羊的代谢状态的影响.
主要方法:
- 来自实验的数据按饮食中的能量度 (E60: 60-100% NRC 要求; E100: >100%) 和 litter 尺寸 (单身,双胞胎,三胞胎,四胞胎+) 分类.
- 使用元回归分析来检查一天到羔羊,饮食能量和 litter 尺寸对循环葡萄糖,NEFA 和 BHB 的影响.
主要成果:
- 葡萄糖度下降,然后增加到羔羊,在E60和较大的子中出现更大的下降和较低的水平.
- 循环NEFA的增加是线性的,E60的度更高,随着 litter 尺寸的增加,NEFA的增加更明显.
- BHB随着怀孕增加,显示出更高的拦截点和更的斜坡E60和更大的子.
结论:
- 子的大小在孕期晚期对母羊的能量需求产生重大影响,较大的子加剧了能量摄入不足的负面影响.
- 目前的饮食建议可能对携带三只或更多羔羊的母羊不够,这凸显了对高平价母羊的数据缺口.
相关概念视频
00:51Energy Budgets
10.5K
Organisms must balance energy intake with the energy required for growth, maintenance and reproduction. These trade-offs result in a variety of survivorship and reproductive strategies, including semelparity and iteroparity. Semelparous species, like annual plants, have only one reproductive episode in their lifetimes and consequently have short lifespans. Iteroparous species, by contrast, have many reproductive events during their lifetimes but have relatively few offspring. These two...
10.5K
01:01Production Efficiency
18.1K
Net production efficiency (NPE) is the efficiency at which organisms assimilate energy into biomass for the next trophic level. Due to low metabolic rates and less energy spent on thermoregulatory processes, the NPE of ectotherms (cold-blooded animals) is 10 times higher than endotherms (warm-blooded animals).
18.1K
01:25Metabolic Rate
1.1K
The human body is a powerhouse of energy, with every cell performing numerous functions that require energy. This energy production and consumption is measured by the metabolic rate, which quantifies the total heat generated by all the body's chemical reactions and mechanical work. This measurement helps to determine the rate of kilocalorie (kcal) consumption needed to fuel all ongoing activities.
The Basal Metabolic Rate (BMR) measures the energy expended at rest.
Several factors influence...
The Basal Metabolic Rate (BMR) measures the energy expended at rest.
Several factors influence...
1.1K
01:19Regulation of Metabolism
11.4K
Cellular needs and conditions vary from cell to cell and change within individual cells over time. For example, the required enzymes and energetic demands of stomach cells are different from those of fat storage cells, skin cells, blood cells, and nerve cells. Furthermore, a digestive cell works much harder to process and break down nutrients during the time that closely follows a meal compared with many hours after a meal. As these cellular demands and conditions vary, so do the amounts and...
11.4K
01:19Energy Balance
994
The human body gets energy from the three macronutrients: carbohydrates, proteins, and fats. Energy is released when the chemical bonds in the organic compounds present in the food are broken down. The energy content of food is measured in kilocalories (kcal), defined as the amount of heat required to raise the temperature of one kilogram of water by one degree Celsius. This value is determined by measuring the temperature change of the water surrounding a calorimeter after the complete...
994
01:18Metabolic States of the Body: The Postabsorptive State
1.2K
The postabsorptive state usually starts about four hours after a meal and lasts until the next meal is eaten. During this time, the digestive system stops absorbing nutrients, and the body uses stored energy reserves to maintain stable blood glucose levels.
Initially, glycogen stored in the liver is broken down to release glucose into the bloodstream, while glycogen in the muscles is broken down to supply glucose for energy directly within the muscle cells. As glycogen stores diminish,...
Initially, glycogen stored in the liver is broken down to release glucose into the bloodstream, while glycogen in the muscles is broken down to supply glucose for energy directly within the muscle cells. As glycogen stores diminish,...
1.2K