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倪荣军, 田洋, 戴昕烨, 赵连生, 韦锦学, 周江宁, 马小红, 李涛. 2020: 实验室中雄性树鼩对陌生同类表现出社交回避行为而雄性小鼠则表现出亲社会行为. 动物学研究, 41(3): 258-272. DOI: 10.24272/j.issn.2095-8137.2020.034
引用本文: 倪荣军, 田洋, 戴昕烨, 赵连生, 韦锦学, 周江宁, 马小红, 李涛. 2020: 实验室中雄性树鼩对陌生同类表现出社交回避行为而雄性小鼠则表现出亲社会行为. 动物学研究, 41(3): 258-272. DOI: 10.24272/j.issn.2095-8137.2020.034
Rong-Jun Ni, Yang Tian, Xin-Ye Dai, Lian-Sheng Zhao, Jin-Xue Wei, Jiang-Ning Zhou, Xiao-Hong Ma, Tao Li. 2020: Social avoidance behavior in male tree shrews and prosocial behavior in male mice toward unfamiliar conspecifics in the laboratory. Zoological Research, 41(3): 258-272. DOI: 10.24272/j.issn.2095-8137.2020.034
Citation: Rong-Jun Ni, Yang Tian, Xin-Ye Dai, Lian-Sheng Zhao, Jin-Xue Wei, Jiang-Ning Zhou, Xiao-Hong Ma, Tao Li. 2020: Social avoidance behavior in male tree shrews and prosocial behavior in male mice toward unfamiliar conspecifics in the laboratory. Zoological Research, 41(3): 258-272. DOI: 10.24272/j.issn.2095-8137.2020.034

实验室中雄性树鼩对陌生同类表现出社交回避行为而雄性小鼠则表现出亲社会行为

Social avoidance behavior in male tree shrews and prosocial behavior in male mice toward unfamiliar conspecifics in the laboratory

  • 摘要: 成年雄性树鼩对入侵的同类防御剧烈。但是,这些雄性树鼩的社交行为特征尚未得到全面探究。本研究中,首先让雄性野生的中国树鼩和C57BL/6J小鼠熟悉测试用的旷场箱子,树鼩在新颖的旷场环境中运动的时间较短,而小鼠则表现较长的运动时间。在30分钟的社会偏好与回避实验中,目标树鼩(入侵者)显著减少了实验树鼩(居住者)在社会交互区域(SI)中的停留时间,而实验小鼠表现出相反的结果。此外,实验树鼩表现出在第二个15分钟测试(存在目标树鼩)中进入SI中的潜伏期比在第一个15分钟测试(无目标树鼩)中更长,这与在小鼠中发现的结果不同。在第一个、第二个和第三个5分钟时间内,还观察到了雄性树鼩和小鼠对于同类入侵者表现出不同的行为范式,因此,树鼩和小鼠的社交行为似乎表现出时间依赖性。总而言之,我们的研究提供了一种改良的社会偏好与回避实验方法用于评估树鼩的社交行为。我们的发现表明,雄性树鼩对陌生同类表现出社交回避行为,而雄性小鼠对陌生同类表现出亲社会行为。树鼩可能是一种新的用于研究社会回避和亲社会行为的动物模型,这不同于小鼠社交模型。

     

    Abstract: Adult male tree shrews vigorously defend against intruding male conspecifics. However, the characteristics of social behavior have not been entirely explored in these males. In this study, male wild-type tree shrews (Tupaia belangeri chinensis) and C57BL/6J mice were first allowed to familiarize themselves with an open-field apparatus. The tree shrews exhibited a short duration of movement (moving) in the novel environment, whereas the mice exhibited a long duration of movement. In the 30 min social preference-avoidance test, target animals significantly decreased the time spent by the experimental tree shrews in the social interaction (SI) zone, whereas experimental male mice exhibited the opposite. In addition, experimental tree shrews displayed a significantly longer latency to enter the SI zone in the second 15 min session (target-present) than in the first 15 min session (target-absent), which was different from that found in mice. Distinct behavioral patterns in response to a conspecific male were also observed in male tree shrews and mice in the first, second, and third 5 min periods. Thus, social behaviors in tree shrews and mice appeared to be time dependent. In summary, our study provides results of a modified social preference-avoidance test designed for the assessment of social behavior in tree shrews. Our findings demonstrate the existence of social avoidance behavior in male tree shrews and prosocial behavior in male mice toward unfamiliar conspecifics. The tree shrew may be a new animal model, which differs from mice, for the study of social avoidance and prosocial behaviors.

     

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