阿尔及利亚乳牛群的繁殖表现面临的气候挑战
Aziza Ferag1, Djalel Eddine Gherissi2, Tarek Khenenou1
1Institute of Agricultural and Veterinary Sciences, Deprtement of Veterinary Sciences, University of Souk-Ahras, 41000, Algeria.
Journal of thermal biology
|February 15, 2026
概括
气候变化对阿尔及利亚的奶牛生育率产生了负面影响,热应激 (THI>72) 显著降低了受孕率. 尽管面临环境挑战,当地品种和干旱地区的繁殖表现更好.
科学领域:
- 动物科学动物科学
- 生殖生物学 生殖生物学
- 环境科学 环境科学
背景情况:
- 地中海地区的气候变化,特别是阿尔及利亚,对牲畜产生影响.
- 乳牛的生育能力对农业经济至关重要.
- 热应激是动物繁殖日益关注的问题.
研究的目的:
- 评估环境因素 (温度湿度指数,地区,品种) 对阿尔及利亚乳牛生殖参数的影响.
- 评估热应激对受孕率和生育率的影响.
- 确定影响阿尔及利亚牛的生殖表现的因素.
主要方法:
- 在2016-2021年期间,对24657头奶牛进行了40,956次人工授精 (AI) 的分析.
- 统计评估受孕率 (CR1stAI,CR2ndAI),整体受孕率 (OCR),明显生育指数 (AFI) 和生殖期 (RP).
- 温度湿度指数 (THI) 和生殖参数之间的相关性分析.
主要成果:
- 阿尔及利亚的奶牛生育率很低,COVID-19加剧了这种情况.
- 热应激 (THI>72) 与降低生育能力 (P < 0.000) 有显著的相关性.
- 干旱地区和本地品种表现出优越的繁殖性能;THI>80降低了OCR和CR1stAI的可能性.
结论:
- 气候条件,特别是热应激,对阿尔及利亚的奶牛生育能力产生不利影响.
- 实施减轻热应激的战略对于改善生殖结果至关重要.
- 专注于奶牛的福祉是克服生育挑战的关键.
相关概念视频
What is Climate?
21.0K
Climate refers to the prevailing weather conditions in a specific area over an extended period. As the saying goes, “Climate is what you expect. Weather is what you get.” Climate is influenced by geographic factors, such as latitude, terrain, and proximity to bodies of water.
21.0K
Migration
9.0K
Migration is long-range, seasonal movement from one region or habitat to another. This common strategy, carried out by many different organisms around the world, is an adaptive response that typically corresponds to changes in an organism’s environment, like resource availability or climate. Migrations can involve huge groups of thousands of animals as well as single individuals traveling alone and can range from thousands of kilometers to just a few hundred meters.
9.0K
What is Natural Selection?
129.9K
Natural selection is an evolutionary process in which individuals with survival-promoting traits reproduce at higher rates. These favorable traits become more common within a population or species. Naturally selected traits initially arise via random genetic mutations. In order for selection to occur, there must be variation within a population, the trait controlling the variation must be heritable, and there must be an evolutionary advantage for variation in the trait.
129.9K
Adaptations that Reduce Water Loss
28.3K
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
28.3K
Global Climate Change
29.1K
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
29.1K


