The change of sleeping and lying posture of Japanese black cows after moving into new environment.
The change of sleeping and lying posture of Japanese black cows after moving into new environment.
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DOI：
10.5713/ajas.18.0048
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发表时间：
2018-11
期刊：
影响因子：
--
通讯作者：
Higashiyama Y
中科院分区：
文献类型：
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作者：
Fukasawa M;Komatsu T;Higashiyama Y
环境变化是畜牧业生产中的应激事件之一。环境的变化会干扰奶牛的行为，奶牛需要几天时间才能恢复稳定的行为模式。睡眠姿势（SP）和躺卧姿势（LP）已被用作放松和良好适应其环境的动物的指标。本研究的目的是研究日本黑牛进入新环境后，SP和LP稳定所需的时间。使用了7头怀孕的日本黑牛。在35天的试验期内，将奶牛移到新的扎栏舍中，对奶牛的睡眠和卧位进行了17次测量。SP和LP分别由固定在枕骨中部和臀部的加速度计检测。计算SP和LP的每日总时间、频率和平均发作次数。日SP时间在第1天最短，在第3天增加到最高。然后下降至第9天，之后稳定约65 min/d，直至实验结束。每日LP时间的变化方式与每日SP时间相同。第1天平均SP发作时间最长，第7天降至稳定水平。另一方面，平均LP回合在第1天最短，并在第7天增加到稳定水平。结果表明，日本黑牛妊娠期需要1周的时间来稳定其SP，但平均SP和LP次数的变化规律不同，尽管SP和LP日变化规律相似。
Environmental change is one of the stressful events in livestock production. Change in environment disturbs cow behavior and cows require several days to regain a stable behavioral pattern. Sleeping posture (SP) and lying posture (LP) have been used as indicators for animal that are relaxed and well-acclimated to their environment. The aim of this study was to examine the time required by Japanese black cows for stabilization of SP and LP after moving into new environment. Seven pregnant Japanese black cows were used. Cows were moved into new tie-stall shed and their sleeping and lying posture measured 17 times during 35 experimental days. Both SP and LP were detected by accelerometer fixed on middle occipital and hip-cross, respectively. Daily total time, frequency, and average bout of both SP and LP were calculated. Daily SP time was the shortest on day 1 and increased to the highest on day 3. It then decreased until day 9, after that stabilized about 65 min/d till the end of experiment. Daily LP time changed in same manner as daily SP time. The average SP bout was the longest on day 1, and then decreased to stable level on day 7. On the other hand, the average LP bout was the shortest on day 1, and it increased to stable level on day 7. These results showed that pregnant Japanese black cows needed 1 week to stabilize their SP. However, there were different change patterns between the average SP and LP bout, even though the change pattern of daily SP and LP time were similar.