Zhang Ye, Yu Jiaqi, Zhang Yu, Zhang Yaqian, Sun Fang, Yao Yuhan, Bai Ziyu, Sun Hanqing, Zhao Qian, Li Xiang
College of Animal Science and Technology, Northeast Agricultural University, Changjiang Road No. 600, Harbin 150030, China.
Key Laboratory of Swine Facilities, Ministry of Agriculture, Northeast Agricultural University, Changjiang Road No. 600, Harbin 150030, China.
Animals (Basel). 2023 Oct 10;13(20):3160. doi: 10.3390/ani13203160.
This study expects to confirm the existence of emotional transmission in pigs from multiple perspectives and to provide theoretical references for improving animal welfare in livestock farming. A group that could directly observe (DO) and a group that could not directly observe (NO) were created based on whether or not their peers observed the treatment process, as the treated pig (TP) was treated with electrical shock and the companion pig (CP) either witnessed the treatment inflicted upon TP or not, and a third group was a control group, in which neither pig was stimulated. The behavioral responses of both the TPs and CPs were recorded to evaluate the emotional reaction. The results found that in both the DO and NO groups, the frequency of TP freezing was significantly higher than that of CP, and CP was significantly higher than that of the control group. Interestingly, although the social interaction responses of the CPs were not similar in the DO and NO groups, there were no significant differences between the behaviors of TPs in the DO and NO groups, except for nose-nose contact and a single approach to the partition, which allowed us to conclude that, whether or not the pigs directly observed the negative treatment, they were able to respond accordingly to fear and provide similar social support to their companions who were treated negatively.
本研究期望从多个角度证实猪中存在情绪传递现象，并为改善畜牧养殖中的动物福利提供理论参考。根据同伴有无观察到治疗过程，创建了一个能够直接观察（DO）的组和一个不能直接观察（NO）的组，将接受治疗的猪（TP）进行电击处理，同伴猪（CP）要么目睹对TP施加的治疗，要么未目睹，第三组为对照组，其中两头猪均未受到刺激。记录TP和CP的行为反应以评估情绪反应。结果发现，在DO组和NO组中，TP僵住的频率均显著高于CP，且CP显著高于对照组。有趣的是，尽管DO组和NO组中CP的社交互动反应不相似，但DO组和NO组中TP的行为之间没有显著差异，除了鼻对鼻接触和单次靠近隔板，这使我们得出结论，无论猪是否直接观察到负面治疗，它们都能够对恐惧做出相应反应，并为受到负面治疗的同伴提供类似的社会支持。
