Rats do not consider all unfamiliar strains to be equivalent
Rats do not consider all unfamiliar strains to be equivalent
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DOI：
10.1016/j.beproc.2021.104457
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发表时间：
2021-07-03
影响因子：
1.3
通讯作者：
Takeuchi, Yukari
中科院分区：
文献类型：
--
作者：
Kogo, Hiroki;Maeda, Naori;Takeuchi, Yukari
当我们认识到对手是同一社会群体的成员时，人类表现出不同的社会行为。然而，很少有人注意到社会相似性在非人类动物中的作用。在Wistar受试大鼠中，一只不熟悉的Wistar大鼠的存在减轻了应激反应，这表明社会相似性在这种压力缓冲现象中的重要性。我们随后发现，不熟悉的Sprague-Dawley（SD）或Long-Evans（LE）大鼠的存在，而不是不熟悉的Fischer 344（F344）大鼠，同样减轻了受试大鼠的应激反应。因此，受试大鼠可能认识到与不熟悉的SD和LE大鼠的社会相似性。在这项研究中，我们证明了Wistar受试大鼠能够根据其品系对不熟悉的大鼠进行分类，并且Wistar受试者对不熟悉的Wistar、SD和LE大鼠的偏好超过F344大鼠。然而，受试大鼠在Wistar、SD和LE大鼠中没有表现出偏好。此外，该结果并非由于对F344大鼠的厌恶，当将麻醉大鼠提供给受试大鼠时，偏好不受影响。研究结果表明，老鼠能够识别出某些不熟悉的老鼠种群的社会相似性。
Humans show distinct social behaviours when we recognise social similarity in opponents that are members of the same social group. However, little attention has been paid to the role of social similarity in non-human animals. In the Wistar subject rats, the presence of an unfamiliar Wistar rat mitigated stress responses, suggesting the importance of social similarity in this stress-buffering phenomenon. We subsequently found that the presence of unfamiliar Sprague-Dawley (SD) or Long-Evans (LE) rats, but not an unfamiliar Fischer 344 (F344) rat, similarly mitigated stress responses in the subject rats. It is therefore possible that the subject rats recognised social similarity to unfamiliar SD and LE rats. In this study, we demonstrated that the Wistar subject rats were capable of categorizing unfamiliar rats based on their strain, and that the Wistar subjects showed a preference for unfamiliar Wistar, SD, and LE rats over F344 rats. However, the subject rats did not show a preference among Wistar, SD, and LE rats. In addition, the results were not due to an aversion to F344 rats, and preference was not affected when anaesthetised rats were presented to the subject rats. The findings suggested that rats recognise social similarity to certain unfamiliar strains of rats.