Livestock Science ( IF 1.8 ) Pub Date : 2020-06-12 , DOI: 10.1016/j.livsci.2020.104136 Mona Lilian Vestbjerg Larsen , Lene Juul Pedersen , Sandra Edwards , Samuel Albanie , Marian Stamp Dawkins
Videos of pigs were analysed using an optical flow algorithm to measure group movement in the four days leading up to and including an outbreak of tail-biting. 8 pens in which tail-biting occurred (Outbreak) were retrospectively matched with 8 similar pens in which no tail-biting occurred over the lifetime of the pigs (NoOutbreak) and videos analysed for the same four days. Results showed an increase in movement over the four days in both groups and no difference between Outbreak pens and their matched NoOutbreak pens. On the contrary, Outbreak and NoOutbreak matched pens showed similar changes in behaviour, suggesting that the pigs were influencing each other or responding to common external circumstances. Such a tendency to “match” the behaviour of pigs in neighbouring pens makes it difficult to identify which pens will show tail biting.
中文翻译:
通过光流检测到的运动变化先于但未预测到猪被咬尾
使用光流算法分析了猪的视频,以测量在咬人爆发之前(包括爆发)的四天内的群体运动。回顾性地将8头发生咬尾的笔(暴发)与8头类似的在猪的一生中没有发生咬尾的笔(无爆发)相匹配,并在相同的四天内分析了视频。结果显示两组的运动量在四天内均增加,爆发笔和与其匹配的NoOutbreak笔之间没有差异。相反,爆发和无爆发匹配的笔表现出相似的变化,表明这些猪之间相互影响或对共同的外部环境做出反应。这种“匹配”相邻笔中猪的行为的趋势使得很难识别哪只笔会出现咬尾现象。