繁殖母猪的昼夜温度节律:发情天数与断奶后发情天数之间的差异。

IF 3 2区 农林科学 Q1 VETERINARY SCIENCES Porcine Health Management Pub Date : 2024-05-21 DOI:10.1186/s40813-024-00369-7
P Sánchez-Giménez, A Martínez-Nicolas, J A Madrid, R Fernández, L Martínez-Alarcón, F Murciano, A Muñoz, G Ramis
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引用次数: 0

摘要

背景:哺乳动物受昼夜节律的影响,控制着各种生理活动。体温是已知的全天变化参数之一,也会受到环境温度等因素的影响。然而,有关繁殖母猪体温节律的研究并不多。本研究旨在确定在温暖气候条件下,断奶后母猪在发情期的体温昼夜节律参数:结果:与其他季节相比,夏季母猪在日间稳定性、日内分散性和周期长度方面存在差异。母猪发情期与非发情期的日内破碎率也存在差异,这些差异在温暖季节比寒冷季节更为显著。用 COSINOR 标准化的参数在比较季节时也显示出显著差异,尤其是在最高温度的前后期。另一个重要发现是,与其他季节相比,夏季监测到的母猪发情期阴道温度升高。体温、阴道温度和环境温度之间存在相关性:温度的昼夜节律受季节影响,与其他季节相比,夏季显然是昼夜节律参数差异最大的季节。极端的夏季条件似乎肯定会影响这种节律,并使母猪的体温和阴道温度与一年中的其他季节不同。在母猪发情的日子里,体温和阴道温度的昼夜节律增强可能与发情和排卵的荷尔蒙事件有关,而且似乎与天气无关,因为它发生在所有受控季节。然而,无论是在发情期还是在母猪不发情的日子里,夏季的体温和阴道温度都明显高于其他季节。
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Circadian temperature rhythm in breeding sows: differences between days in oestrus and anoestrus after weaning.

Background: Mammals are subject to circadian rhythms for the control of various physiological events. One of the parameters known to be subject to variations throughout the day is body temperature, which is also subject to influences such as environmental temperature. However, there are not many studies on these rhythms in breeding sows. The aim of this study was to determine the circadian parameters for body temperature in post-weaning sows during oestrus period, throughout the seasons in a warm climate.

Results: Differences were observed in inter-daily stability, intra-daily fragmentation and cycle length comparing the summer sows with the other seasons. Differences were also observed in the period that the sows were in oestrus compared to the non-oestrus period for intra-daily fragmentation, with these differences being more important in the warm seasons compared to the cold seasons. The parameters normalised by COSINOR also showed significant differences when comparing seasons, especially in the acrophase of the temperature maximum. Another significant finding was an increase in vaginal temperature during oestrus in sows monitored in summer compared to the other seasons. Correlations between body, vaginal and environmental temperature were observed.

Conclusion: There is a seasonal influence on the circadian rhythm of temperature and summer is clearly the season with the greatest differences in circadian parameters when compared to the other seasons. The extreme summer conditions seem to definitely influence this rhythm and make the body and vaginal temperature of the sows different from the rest of the year. The increase in period robustness in both body and vaginal temperature during the days when sows are in oestrus could be related to the hormonal events of oestrus and ovulation and seems to be independent of weather since it occurs in all controlled seasons. However, this robustness is significantly higher in summer than in the other seasons both in the oestrus period and on days when sows are not in oestrus.

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来源期刊
Porcine Health Management
Porcine Health Management Veterinary-Food Animals
CiteScore
5.40
自引率
5.90%
发文量
49
审稿时长
14 weeks
期刊介绍: Porcine Health Management (PHM) is an open access peer-reviewed journal that aims to publish relevant, novel and revised information regarding all aspects of swine health medicine and production.
期刊最新文献
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