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Asian-Australas J Anim Sci > Accepted Articles
DOI: https://doi.org/10.5713/ajas.18.0048    [Accepted] Published online April 25, 2018.
The change of sleeping and lying posture of Japanese black cows after moving into new environment
Michiru FUKASAWA1,*  , Tokushi KOMATSU2, Yumi HIGASHIYAMA2
1Graduate school of Agricultural Science, Tohoku University, Osaki, Japan
2NARO, Tohoku Agricultural Research Center, Morioka, Japan
Correspondence:  Michiru FUKASAWA, Tel: 0229847376, Fax: 229847376, Email: michiru.fukasawa.b4@tohoku.ac.jp
Received: 10 January 2018   • Revised: 14 March 2018   • Accepted: 24 April 2018
Abstract
Objective: The environmental change is one of the stressful events in livestock production. Change in environment disturbed cow behavior and cows needed several days to reach stable behavioral pattern, especially sleeping posture (SP) and lying posture (LP) have been used as an indicator for relax and well-acclimated to its environment. The aim of this study examines how long does Japanese black cow required for stabilization of SP and LP after moving into new environment.

Methods

Seven pregnant Japanese black cows were used. Cows were moved into new tie-stall shed and measured sleeping and lying posture 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.

Results

Daily SP time was the shortest on day 1, and increased to the highest on day3. It decreased until day 9, after that stabilized about 65 min /day till the end of experiment. The longest average SP bout was shown on day 1, and it decreased to stabilize till day 7. Daily LP time was changed as same manner as daily SP time. The average SP bout showed the longest on day 1, and it decreased to stable level till day 7. On the other hand, the average LP bout showed the shortest on day1, and it was increased to stable level till on day 7.
Conclusion
These results showed that pregnant Japanese black cows needed 1 week to stabilize their SP. However, there were different change pattern between the average SP and LP bout, even though the change pattern of daily SP and LP time were similar.
Keywords: cattle; lying posture; new environment; sleeping posture
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