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Tropical Animal Health and Production - We evaluated the relationship between the temperature–humidity index (THI) and health and growth performance in Japanese black calves in Japan. Data... 相似文献
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Akihiro MATSUURA Mami IRIMAJIRI Kunihiro MATSUZAKI Yuko HIRAGURI Toshihiko NAKANOWATARI Atusi YAMAZAKI Koichi HODATE 《Animal Science Journal》2013,84(1):75-81
The aim of this study was to establish a method for estimating loading capacity for Japanese native horses by gait analysis using an accelerometer. Six mares of Japanese native horses were used. The acceleration of each horse was recorded during walking and trotting along a straight course at a sampling frequency of 200 Hz. Each horse performed 12 tests: one test with a loaded weight of 80 kg (First 80 kg) followed by 10 tests with random loaded weights between 85 kg and 130 kg and a final test with a loaded weight of 80 kg again. The time series of acceleration was subjected to fast Fourier transformation, and the autocorrelation coefficient was calculated. The first two peaks of the autocorrelation were defined as symmetry and regularity of the gait. At trot, symmetries in the 100, 110, and 125 kg tests were significantly lower than that in First 80 kg (P < 0.05, by analysis of covariance and Sidak's test). These results imply that the maximum permissible load weight is less than 100 kg, which is 29% of the body weight of Japanese native horses. Our method is a widely applicable and welfare‐friendly method for estimating maximum permissible load weights of horses. 相似文献
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Tomohiro Yonezawa Kohei Sato Mona Uchida Naoaki Matsuki Atusi Yamazaki 《Animal Science Journal》2017,88(1):195-200
Contagious yawning is triggered by others yawning, and it has previously been reported in humans, primates and several experimental and companion mammals. Whereas it might be a response to an innate releasing mechanism, contagious yawning is also considered to involve emotional contagion. Here, we demonstrate that sheep, the animal model of livestock animals, also experience contagious yawning. Twelve adult castrated Corriedale sheep were used in this study. Pairs of sheep were adjacently restrained with or without a wooden divider panel to shield them from viewing the other. Their behaviors were video‐recorded for 3 days in each condition. Sheep yawned 2.0 ± 1.1 and 1.2 ± 1.1 times/day/head in the unshielded and shielded conditions, respectively. Unshielded restrained sheep yawned within 1 min after the other one 11.1% of the time, while shielded pairs did not exhibit contagious yawning. Rumination was also highly synchronized under the unshielded condition. These data reveal that contagious yawning and behavioral synchronicity occur in ruminants like sheep, making them a suitable animal model to investigate contagious yawning and the underlying mechanism. 相似文献
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Akihiro MATSUURA Masaya TANAKA Mami IRIMAJIRI Atusi YAMAZAKI Toshihiko NAKANOWATARI Koichi HODATE 《Animal Science Journal》2010,81(5):618-621
Horse trekking (HT) is having a stroll on a horse along a walking trail in a forest, field, and/or sandy beach. Generally in HT, horses exercise in tandem line outside the riding facilities. Because the leading horse will be confronted with stressors in the forefront, we hypothesized that the leading horse shows higher stress responses than the following one. In order to verify the hypothesis, we compared short‐term stress responses between each position in six horses. Exercise consisted of 15 min of ground riding and 45 min of HT with walking and trotting. Heart rate variability was analyzed for 5 min at 30, 60, and 90 min after the exercising period. There was no significant difference in heart rate during exercise between leading and following positions. The high frequency / low frequency power band of heart rate variability, an index of sympathetic nervous activity, after exercise, tended to be higher in the leading position than following one (P < 0.1). The result in this study can suggest that the leading horse was in a higher stressed state than the following horse after HT. 相似文献
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Hisashi NABENISHI Natsuko NEGISHI Atusi YAMAZAKI 《The Journal of reproduction and development》2021,67(1):53
This study assessed the feasibility of using camera image analysis to detect behavioral changes as an indicator of the onset of calving in Japanese Black cattle. Thirty-five pregnant cattle individually housed in pens were used and were continuously monitored using a digital camera system. For the automatic determination of the x and y coordinates of a cow, trajectory analysis was conducted using thermal image and analysis software, and the distances moved were calculated using coordinate data. Further, the frequency of postural changes and the time spent tail raising per hour were measured for 14 cows using visible images. The measurement data were used to calculate hourly data for 12 h prior to amniorrhexis (first rupture of the allantoic sac). The hourly distances moved tended to increase at the time of amniorrhexis, with significantly longer distances measured 3–0 h before amniorrhexis than those at 12–8 h before amniorrhexis (P < 0.05). In all cows, amniorrhexis occurred within 11 h of hourly distances moved by more than 50% compared with distance moved the previous hour. The overall average elapsed time before amniorrhexis was 9 h 30 min (range: 5–11 h). Tail raising time and the frequency of postural changes significantly increased at 1–0 h and 2–0 h before amniorrhexis, respectively. This suggests that predicting the time of calving is possible by measuring the activity of Japanese Black cows during late pregnancy using camera image analysis as a non-invasive technique. 相似文献
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Mizuna Ogino Akihiro Matsuura Atusi Yamazaki Mami Irimajiri Yoshihiro Suzuki Shiro Kushibiki Hroyuki Singu Etsuko Kasuya Yoshihisa Hasegawa Koichi Hodate 《Animal Science Journal》2014,85(1):58-68
The secretion rhythms of plasma cortisol (CORT) and prolactin (PRL), hormones related to stress responsiveness and biological rhythm and controlled by light and temperature, were investigated under varying external environments and different management techniques. Serial blood samples were collected from female cattle reared in free‐stall and freely fed (FF) conditions (n = 4) or in tie‐stall and restricted feeding (RF) conditions (hay and concentrate twice daily, n = 4). Plasma CORT and PRL concentrations, eating behavior, and environmental parameters were analyzed. Cyclic patterns for each parameter were examined using spectral analysis, and correlations between CORT, PRL and other parameters were investigated using cross‐spectral analysis. Under FF conditions, CORT secretion was not related to the lighting intensity and eating behavior. However, under RF conditions, the CORT secretion rhythm showed a distinct correlation with lighting intensity and eating behavior. Under FF conditions, the PRL secretion rhythm was similar in all seasons. However, under RF conditions, the PRL rhythm oscillated with high frequency in summer and low frequency in winter, indicating a seasonal change in rhythm. The present study demonstrates that hormone secretion rhythms change under different environments and management techniques. 相似文献
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Mizuna Ogino Akihiro Matsuura Atusi Yamazaki Mami Irimajiri Shiro Kushibiki Hiroyuki Shingu Etsuko Kasuya Yoshihisa Hasegawa Koichi Hodate 《Animal Science Journal》2013,84(3):253-257
The purpose of the present study was to investigate the secretion cycles of melatonin (MEL) in cattle over the course of four seasons. Four female Japanese Shorthorn cattle under free‐stall and ad libitum feeding conditions were used, and plasma MEL concentrations were measured over a 48 h period at 1 h intervals. The time‐series data were analyzed by spectral analysis, and the cycle hour was determined. Data indicated that the secretion cycle for MEL was approximately 23.5 h for all four seasons. The area under the curve of MEL from start to end of experiment for 48 h did not differ significantly among the four seasons. However, the duration of high MEL secretion which defined the duration time of the values were more than 10 pg/mL and differed significantly among the four seasons. In conclusion, this study, which was the first to use spectral analysis to evaluate the cyclic rhythm of MEL in cattle, revealed that MEL secretion cycles did not differ among the seasons. These findings are inconsistent with previous study results in that previous reports suggested that the MEL secretion cycle differed under different lighting conditions. 相似文献
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Mizuna Ogino Akihiro Matsuura Atusi Yamazaki Mami Irimajiri Hideyuki Takahashi Tokushi Komatsu Shiro Kushibiki Hiroyuki Shingu Etsuko Kasuya Yoshihisa Hasegawa Koichi Hodate 《Animal Science Journal》2013,84(6):513-526
Plasma insulin (INS), thyroxin (T4), glucose (GLU), non‐esterified fatty acid (NEFA), blood urea nitrogen (BUN), rectal temperature (RT) and eating behavior were evaluated in Japanese Shorthorn cattle under varying external environments and management techniques. Serial blood collection and assessments of RT and eating behavior were performed over 48 h in the spring, summer, autumn and winter in four female cattle reared under either free‐stall and ad libitum feeding (FA) conditions or tie‐stall and restricted feeding (TR) conditions. Cycle patterns for each parameter were examined using spectral analysis, and correlations between parameters were investigated using cross‐spectral analysis. Rhythms for all parameters, except eating behavior and T4, did not differ significantly among the varied external environments and between management techniques, although seasonal differences in the concentration or value of parameters were observed. An approximate 3‐ or 4‐h rhythm cycle detected in T4, GLU, NEFA, BUN, and RT might be the common metabolic rhythm. Under both conditions, the metabolite levels showed strong correlations with eating behavior. Moreover, GLU positively correlated with INS at lag time of 0 h, as did eating behavior and RT. 相似文献
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Conception rate of Holstein and Japanese Black cattle following embryo transfer in southwestern Japan 
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下载免费PDF全文 Hisashi Nabenishi Fumiaki Sugino Rui Konaka Atusi Yamazaki 《Animal Science Journal》2018,89(8):1073-1078
This study aimed to quantify and compare conception rates to embryo transfer (ET) of Holstein and Japanese Black cattle in southwestern Japan. A 10‐year retrospective epidemiological survey was conducted. The recipient numbers for Holstein and Japanese Black cattle was 621 and 527, respectively. Conception rates of Holstein and Japanese Black cattle during the study period were 45.4% and 42.3%, respectively. There was no significant difference between both breeds. However, a different trend of conception rate to ET in Holstein and Japanese Black cattle was observed. In Holstein cattle, conception rate in August to October was lower than in the other months and was significantly lower (p < .05) than in April. Particularly, conception rate in October of Holstein cattle was the lowest (31.0%). In Japanese Black cattle, conception rates in December (24.2%) and January (31.3%) were lower than in the other months. Conception rate of Japanese Black cattle declined as the temperature–humidity index (THI) decreased, exhibiting significantly lower levels in the ≤45 THI class than in any other THI class (p < .05). By contrast, in Holstein cattle, no relationship was observed between conception rate and THI on the day of ET. These observations suggest the importance of appropriate management that considers seasonal reactivity in each breed. 相似文献
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