Weiss Elizabeth
Anthropology Department, San Jose State University, San Jose, CA 95192-0113, USA.
Am J Phys Anthropol. 2009 Sep;140(1):19-24. doi: 10.1002/ajpa.21025.
This study uses two prehistoric Amerindian populations of hunter-gatherer subsistence patterns to determine whether levels of sexual dimorphism in humeral bilateral cross-sectional asymmetry are related to sex-specific differences in activities among these populations. Results confirmed that males of the California Amerind population who engaged in the more unimanual activities of spear hunting and warfare were more asymmetrical than were their female counterparts who engaged in the more bimanual activities of grinding acorns. California Amerind males were also more asymmetrical than British Columbian Amerind males who rowed (using both arms) extensively. Sex differences within British Columbian Amerinds were not statistically significant, nor were female differences between populations. In general, levels of humeral asymmetry appear to be more dependent on sex and population-specific behaviors rather than broad subsistence patterns.
本研究利用两个具有狩猎采集生存模式的史前美洲印第安人群体，来确定肱骨双侧横截面不对称性的性二态性水平是否与这些群体中不同性别的活动差异有关。结果证实，从事更偏向单手活动（如 spear hunting 和战争）的加利福尼亚美洲印第安男性，比从事更偏向双手活动（如研磨橡子）的女性更不对称。加利福尼亚美洲印第安男性也比广泛使用双桨划船（双臂并用）的英属哥伦比亚美洲印第安男性更不对称。英属哥伦比亚美洲印第安人群体内部的性别差异无统计学意义，不同群体间的女性差异也无统计学意义。总体而言，肱骨不对称水平似乎更多地取决于性别和特定群体的行为，而非广泛的生存模式。
