月亮周期会影响热带杂交牛的产犊频率、妊娠期长短和犊牛出生时的体重,但不会影响后代的性别比例。

IF 2.2 4区 医学 Q2 BIOLOGY Chronobiology International Pub Date : 2024-12-01 Epub Date: 2024-11-22 DOI:10.1080/07420528.2024.2432437
Fernando P Perea, Adriana M Pulla, Katherine P Quito, Manuel E Soria, Alfredo Romero, Hugo Hernández-Fonseca, Roberto A Palomares, Rodolfo Ungerfeld, Patricia Villamediana, Maria S Mendez
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引用次数: 0

摘要

大量研究表明,月亮周期对农场动物的生物功能有影响,这表明预测产犊分布可以通过改善动物生产管理方法来提高存活率。本研究在以往研究的基础上,研究了人工授精奶牛的产犊频率、妊娠期长短、出生体重和犊牛性别受月亮周期影响的情况。我们分析了委内瑞拉马拉开波湖盆地西缘 36 个农场的 121,276 头两用杂交奶牛的记录。农历周期被分为 30 个时期,每个时期 0.984 天,并进一步分为四个阶段:1) 新月前后 1.97 天;2) 新月期 12.8 天;3) 满月前后 1.97 天;4) 减月期 12.8 天。数据采用 SAS 中的逻辑回归和一般线性模型进行分析,分别用对比检验和一般线性模型检验来比较比例和均值。农历周期与犊牛性别之间没有关联。然而,整个农历月的产犊量分布在新月和满月前后两天出现明显的高峰,无论产犊次数或妊娠期长短,这种模式都是一致的。此外,与其他月相(2 月和 4 月)相比,新月(1 月)和满月(3 月)前后的天数也有明显差异。月亮周期也影响妊娠期长度和犊牛出生体重。这项研究扩展了之前的研究结果,证明月相周期会持续影响两用牛人工授精的某些繁殖性状,包括妊娠期长短、犊牛出生体重和产犊分布,对养牛业具有实际意义。
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Moon cycle influences calving frequency, gestation length and calf weight at birth, but not offspring sex proportion in tropical crossbred cattle.

Numerous studies have shown the influence of the moon cycle on biological functions in farm animals, suggesting that predicting calving distribution could enhance survival rates by improving management practices in animal production. This study builds on previous research by examining the impact of the lunar cycle on calving frequency, gestation length, birth weight, and calf sex in artificially inseminated cows. We analyzed 121,276 records from dual-purpose crossbred cows across 36 farms along the western margin of Lake Maracaibo basin, Venezuela. The lunar cycle was divided into 30 periods of 0.984 days each and further categorized into four phases: 1) 1.97 days around the new moon; 2) 12.8 days during the crescent phase; 3) 1.97 days around the full moon; and 4) 12.8 days during the waning phase. Data were analyzed using a logistic regression and the general linear model in SAS, comparing proportions and means with contrast and general linear model tests, respectively. There was no association between the lunar cycle and the sex of calves. However, calvings distribution across the lunar month showed notable peaks 2 days around both the new and full moons, a pattern consistent regardless of the number of calvings or gestation lengths. In addition, significant differences were observed between the days surrounding the new (1) and full (3) moons compared to the other lunar phases (2 and 4). Moon cycle also influenced gestation length and calf birth weight. This study expands previous findings and demonstrates that the lunar cycle consistently affects certain reproductive traits in inseminated dual-purpose cows, including gestation length, calf birth weight, and calving distribution, with practical implications for cattle operations.

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来源期刊
Chronobiology International
Chronobiology International 生物-生理学
CiteScore
5.60
自引率
7.10%
发文量
110
审稿时长
1 months
期刊介绍: Chronobiology International is the journal of biological and medical rhythm research. It is a transdisciplinary journal focusing on biological rhythm phenomena of all life forms. The journal publishes groundbreaking articles plus authoritative review papers, short communications of work in progress, case studies, and letters to the editor, for example, on genetic and molecular mechanisms of insect, animal and human biological timekeeping, including melatonin and pineal gland rhythms. It also publishes applied topics, for example, shiftwork, chronotypes, and associated personality traits; chronobiology and chronotherapy of sleep, cardiovascular, pulmonary, psychiatric, and other medical conditions. Articles in the journal pertain to basic and applied chronobiology, and to methods, statistics, and instrumentation for biological rhythm study. Read More: http://informahealthcare.com/page/cbi/Description
期刊最新文献
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