Frequency-dependent maintenance of left handedness in humans
Frequency-dependent maintenance of left handedness in humans
复制标题
DOI：
10.1098/rspb.1996.0238
复制
发表时间：
1996-12-22
影响因子：
4.7
通讯作者：
Moller, AP
中科院分区：
文献类型：
--
作者：
Raymond, M;Pontier, D;Moller, AP
自新石器时代以来，人类左撇子的比例（10-13%）显然没有改变。左撇子是遗传的，似乎是反复与一些减少健身组件;左撇子的持久性意味着，左撇子在某些情况下有健身优势。我们建议，左撇子有一个频率依赖的优势，在战斗中，因此健身优势。为了验证这一假设，左撇子的频率在一般人群和体育运动的个人（学生和体育精英）进行了比较，因为体育表现可能是一个很好的指标的战斗能力。左撇子的比例较高的个人在互动运动（反映了一些战斗元素），达到50%，在某些运动类别，但不是在非互动运动，是符合战斗假说。男性比女性左撇子的频率更高也与这一假设相一致，因为男性与男性之间的争斗普遍比其他组合更频繁。左撇子在打斗中的频率依赖优势可能解释了左撇子的稳定性。
The percentage (10-13%) of left handedness in humans has apparently not changed since the Neolithic. Left handedness is heritable and appears to be repeatedly associated with some reduced fitness components; the persistence of left handedness implies that left handers have a fitness advantage in some situations. We propose that left handers have a frequency-dependent advantage in fights and for that reason a fitness advantage. To test this hypothesis, left handedness frequencies in the general population and in sporting individuals (both students and the sporting elite) have been compared, as sporting performance is likely to be a good indicator of fighting abilities. The higher proportion of left-handed individuals in interactive sports (reflecting some fighting elements), reaching 50% in some sports categories, but not in noninteractive sports, is consistent with the fighting hypothesis. The greater frequency of left handedness in males than in females is also consistent with this hypothesis, as male-male fights are universally more frequent than other combinations. The frequency-dependent advantage in fights of left handers might explain the stability of left handedness.