Estrus Detection in Synchronized Dairy Buffaloes Based on Behavioral Variables for the Assessment of NEDAP Leg and Neck Monitoring Devices
Estrus Detection in Synchronized Dairy Buffaloes Based on Behavioral Variables for the Assessment of NEDAP Leg and Neck Monitoring Devices
Ray Adil Quddus1, Nisar Ahmad1*, Jalees Ahmad Bhatti1, Anjum Khaleeq2 and Asfand Yar Khan3
ABSTRACT
The study aimed to predict the onset of estrus and insemination timing based on automated recorded behaviors in Buffaloes. A total of 100 estrus events episodes of 60 buffaloes having 2nd to 5th parity were studied either automated monitoring system or visual observation. The rate of true estruses detection was higher when estruses were detected by an automated monitoring system than visual observation (30 vs 17, respectively; P<0.05). However, false estruses prediction was lowered by an automated monitoring system than visual observation (11 vs 19, respectively; P<0.05). Therefore, efficiency (60%) and accuracy (73.1%) of estruses detection by NEDAP were higher than visual observation. The feeding bouts were decreased from day -3 to 0 day (9.56±0.3 vs 6.23±0.3 bouts/d, respectively; P<0.001), and reduction in rumination time was about 3.8 h/d from day -1 to 0 day. The lying bouts (P<0.001) and time (P<0.0001) was first decreased from day -3 to estrus onset then increased. The reduction in lying time was approximately 5.0 h which shows that buffaloes were restless. The standing bouts and time were at the highest level (26.10±1.2 bouts/day, P<0.01 and 11.1±0.7 h/d, P<0.001) at day 0 (estrus onset), which indicated that due to restlessness, buffaloes walking activity increased at estrus. There was a negative correlation between lying and standing variables on the day of estrus, therefore the longest-standing episode was approximately 5 h which was significantly higher in comparison to pre and post estrus days. Estrus is correctly detected by NEDAP than visual observation, which improve the success rate of insemination in Buffalos.
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