Kim Jae-Young, Lee Jae-Sung, Jo Yong-Ho, Lee Hong-Gu
Department of Animal Science and Technology, Sanghuh College of Life Sciences, Konkuk University, Seoul 05029, Korea.
J Anim Sci Technol. 2023 May;65(3):579-587. doi: 10.5187/jast.2022.e117. Epub 2023 May 31.
In this study, rumen temperature and environment in estral and non-estral Korean Native breeding cattle were evaluated by using a bolus sensor. Behavioral and physiological changes in study animals were also assessed. To assess the rumen temperature and environment, we inserted bolus sensors into 12 Korean Native cattle with an average age of 35.5 months, then measured temperature and activity within the rumen using the wireless bolus sensor. Drinking, feeding and mounting behavior, and measured vaginal temperature and levels of intravaginal mucus resistance were recorded. We found that cattle in estrus exhibited more acts of mounting (37.4 vs. 0 times/day), increased vaginal temperature (39.0°C vs. 38.4°C), and decreased vaginal mucus resistance (136.3 Ω vs 197.4 Ω), compared with non-estral animals. Furthermore, increased levels of rumen activity were most significant in estrus cattle at the highest activity levels ( < 0.01). Overall, the estrus group exhibited increased rumen temperature ( = 0.01), compared with the non-estrus group. In conclusion, the results of this study not only provide basic physiological data related to estrus in improved Korean Native breeding cattle, but also suggest that monitoring of rumen temperature and activity might be used as an effective smart device for estrus detection.
在本研究中，通过使用药丸传感器评估了处于发情期和非发情期的韩牛的瘤胃温度和环境。还评估了研究动物的行为和生理变化。为了评估瘤胃温度和环境，我们将药丸传感器插入12头平均年龄为35.5个月的韩牛体内，然后使用无线药丸传感器测量瘤胃内的温度和活动。记录了饮水、采食和爬跨行为，以及测量的阴道温度和阴道黏液电阻水平。我们发现，与非发情期动物相比，发情期的牛表现出更多的爬跨行为（37.4次/天对0次/天）、阴道温度升高（39.0°C对38.4°C）以及阴道黏液电阻降低（136.3Ω对197.4Ω）。此外，瘤胃活动水平的增加在发情期牛处于最高活动水平时最为显著（<0.01）。总体而言，发情期组与非发情期组相比，瘤胃温度升高（=0.01）。总之，本研究结果不仅提供了与改良韩牛发情期相关的基础生理数据，还表明监测瘤胃温度和活动可能用作发情检测的有效智能设备。
