相关实验视频
Updated: May 2, 2026
07:34
Milk Collection Methods for Mice and Reeves' Muntjac Deer
Published on: July 19, 2014
20.5K
litter 尺寸相对于功能乳头数量对哺乳母猪和 litter 性能的影响
Abigail K Jenkins1, Sierra M Collier1, Joel M DeRouchey1
1Department of Animal Sciences and Industry, College of Agriculture, Kansas State University, Manhattan, KS, 66506-0201, United States.
Translational animal science
|December 31, 2025
概括
将子大小与功能性乳头数量相匹配,会影响母猪的表现和小猪的生存率. 比乳母少猪的母猪体重减轻,小猪的断奶重量更高,而更大的幼最大限度地提高了每母猪每年断奶的猪数量.
科学领域:
- 动物科学动物科学
- 生殖生物学 生殖生物学
- 猪生产 生产 猪生产
背景情况:
- 播种生产率受子大小和资源可用性的影响.
- 功能性乳头数量是养能力的一个关键因素.
- 优化相对于乳头数量的子大小对于高效的猪生产至关重要.
研究的目的:
- 评估初始 litter 尺寸相对于功能乳头数量对母猪和 litter 性能的影响.
- 确定最佳的子大小管理策略,以最大限度地提高母猪和小猪的结果.
- 分析对母猪体重,身体状况,生殖表现以及小猪生长和生存的影响.
主要方法:
- 使用了1005头母猪和幼,以平价和功能性乳头数量为准.
- 应用了四种治疗方法: -1,0,+1或+2猪相对于功能性乳头数.
- 记录了母猪的体重,口径得分,背部脂肪深度和 litter 性能指标.
主要成果:
- 相对于乳头数量来说,子数量的增加增加了母猪的体重减轻和小猪的死亡率,但减少了杀率.
- 小猪的断奶体重和平均每日增量随着子数量相对于乳头数量的增加而下降.
- 每母猪每年奶的猪数量 (PSY) 随着子数量相对于乳头数量的增加而增加, +2处理产生了最高的PSY.
结论:
- 比功能性乳头少一头猪的母猪表现出最低的小猪死亡率,母猪体重减轻,以及最大的小猪断奶重量.
- 比功能性乳头多两只猪的母猪实现了每次养,养重量和PSY中最多的断奶猪数量.
- 管理策略应平衡最大限度地提高PSY的子大小,尽量减少母猪体重减轻和小猪死亡率.
相关概念视频
00:55Parental Care
11.7K
Many animals exhibit parental care behavior, including feeding, grooming, and protecting young offspring. Parental care is universal in mammals and birds, which often have young that are born relatively helpless. Several species of insects and fish, as well as some amphibians, also care for their young.
11.7K
01:12The Mammary Glands
3.2K
The female breast is a hemispheric projection of variable size positioned anterior to the pectoralis major and serratus anterior muscles. A fascia layer composed of dense, irregular connective tissue connects it to these muscles.
Each breast features a pigmented projection known as the nipple, through which milk emerges via closely spaced openings of ducts, referred to as lactiferous ducts. Surrounding the nipple is a circular pigmented area of skin named the areola, which appears rough due to...
Each breast features a pigmented projection known as the nipple, through which milk emerges via closely spaced openings of ducts, referred to as lactiferous ducts. Surrounding the nipple is a circular pigmented area of skin named the areola, which appears rough due to...
3.2K
01:30Development of Human Microbiota
61
The human microbiota begins developing at birth and undergoes continual change as we age. Infancy marks a critical period of microbial sensitivity, offering a “window of opportunity” during which beneficial microbes help mature the immune system. By age three, children typically develop a more stable and diverse microbial community. Newborns acquire microbes from their immediate environment; vaginal delivery favors maternal vaginal microbes, while cesarean births favor microbes from...
61
01:28Development of the Oral Microbiota
65
The establishment of the oral microbiome begins before birth, challenging the long-held belief that the fetal oral cavity is sterile. The presence of oral microbes such as Streptococcus and Fusobacterium in amniotic fluid suggests that microbial exposure may occur in utero, potentially through translocation from the maternal oral or gastrointestinal tract. This early colonization primes the neonatal immune system and sets the stage for subsequent microbial succession. Maternal health,...
65