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赵大鹏, 李柏松, 李保国. 2019: 身体姿势对北白颊长臂猿(Nomascus leucogenys)理毛行为中手偏侧表达的影响. 动物学研究, 40(5): 449-455. DOI: 10.24272/j.issn.2095-8137.2019.059
引用本文: 赵大鹏, 李柏松, 李保国. 2019: 身体姿势对北白颊长臂猿(Nomascus leucogenys)理毛行为中手偏侧表达的影响. 动物学研究, 40(5): 449-455. DOI: 10.24272/j.issn.2095-8137.2019.059
Da-Peng Zhao, Bo-Song Li, Bao-Guo Li. 2019: Postural effect on manual laterality during grooming in northern white-cheeked gibbons (Nomascus leucogenys). Zoological Research, 40(5): 449-455. DOI: 10.24272/j.issn.2095-8137.2019.059
Citation: Da-Peng Zhao, Bo-Song Li, Bao-Guo Li. 2019: Postural effect on manual laterality during grooming in northern white-cheeked gibbons (Nomascus leucogenys). Zoological Research, 40(5): 449-455. DOI: 10.24272/j.issn.2095-8137.2019.059

身体姿势对北白颊长臂猿(Nomascus leucogenys)理毛行为中手偏侧表达的影响

Postural effect on manual laterality during grooming in northern white-cheeked gibbons (Nomascus leucogenys)

  • 摘要: 非人灵长类行为偏侧研究有助于阐明人类行为偏侧和大脑认知的进化起源。当前关于身体姿势如何影响长臂猿类物种手偏好表达的相关研究尚处于起步阶段。本研究以10只笼养的国家一级重点保护物种北白颊长臂猿作为研究对象,选择坐姿和支撑双足姿势下的单手理毛作为行为测试任务。本研究发现:虽然北白颊长臂猿在坐姿和支撑双足姿势下的理毛行为均未呈现群组水平上显著的手偏好,但其在坐姿下的理毛行为在群组水平上的手偏好呈现一定的左向倾向,而在支撑双足姿势下的理毛行为在群组水平上的手偏好呈现一定的右向倾向。从坐姿到支撑双足姿势,70%的研究个体的手偏好表达呈现出了不同程度的右倾趋势。支撑双足姿势下的手偏好强度高于坐姿下的手偏好强度。此外,支撑双足姿势下的手偏好表达存在显著的性别差异,而在坐姿下的手偏好表达无显著的性别差异。综上所述,北白颊长臂猿的支撑双足姿势有助于增强其手偏好表达,引起手偏好的右倾趋势,并产生性别特异化的手偏好特点。

     

    Abstract: Investigations on manual laterality in non-human primates can help clarify human evolutionary origins of hand preference and cerebral cognition. Although body posture can influence primate hand preference, investigations on how posture affects hylobatid manual laterality are still in their infancy. This study focused on how spontaneous bipedal behavioral tasks affect hand preference in Hylobatidae. Ten captive northern white-cheeked gibbons (Nomascus leucogenys) were chosen as focal subjects. Unimanual grooming during sitting posture and supported bipedal posture were applied as behavioral tasks. The gibbons displayed a modest tendency on left-hand preference during sitting posture and right-hand preference during supported bipedal posture, although no group-level hand preference was detected for either posture. From the sitting to supported bipedal posture, 70% of individuals displayed different degrees of right-side deviation trends. The strength of manual laterality in the supported bipedal posture was higher than that in the sitting posture. We found significant sex differences in manual laterality during supported bipedal posture but not during sitting posture. Thus, to a certain degree, bipedal posture in N. leucogenys facilitates stronger hand preference, elicits a rightward trend in manual laterality, and produces sex-specific hand preference.

     

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