Rodríguez-Larralde A
Hum Biol. 1989 Feb;61(1):31-44.
The coefficients of relationship and the Euclidean distances between 17 Venezuelan counties were estimated based on the frequency distribution of surnames obtained from the 1984 Venezuelan register of electors. In general, the coefficients of relationship between counties within the same state were higher than those between counties from different states. Euclidean distances exhibited the opposite relationship. Spearman's correlation coefficients for 136 pairs of counties were estimated between geographic and Euclidean distances (r = 0.41), geographic distance and coefficient of relationship (r = -0.44) and between Euclidean distance and coefficient of relationship (r = -0.48). The effect of partial geographic isolation on the frequency distribution of surnames is shown in the State of Falcón, where an isthmus separates two counties of the peninsula from two others on the mainland, and in Mérida, where the Venezuelan Andes separates three counties from the rest of the country. Our results suggest that Euclidean distances are less influenced by common surnames than the coefficients of relationship. They also indicate that in Venezuela a high proportion of the population has remained sedentary until recently, and this gives rise to the focal distribution of some surnames.
基于从1984年委内瑞拉选民登记册中获取的姓氏频率分布，估算了17个委内瑞拉县之间的亲缘系数和欧几里得距离。总体而言，同一州内各县之间的亲缘系数高于不同州各县之间的亲缘系数。欧几里得距离呈现相反的关系。估算了136对县之间地理距离与欧几里得距离的斯皮尔曼相关系数（r = 0.41）、地理距离与亲缘系数的斯皮尔曼相关系数（r = -0.44）以及欧几里得距离与亲缘系数的斯皮尔曼相关系数（r = -0.48）。部分地理隔离对姓氏频率分布的影响在法尔孔州有所体现，该州的一个地峡将半岛上的两个县与大陆上的另外两个县隔开；在梅里达州也有所体现，委内瑞拉安第斯山脉将三个县与该国其他地区隔开。我们的结果表明，与亲缘系数相比，欧几里得距离受常见姓氏的影响较小。它们还表明，在委内瑞拉，直到最近仍有很大一部分人口保持定居状态，这导致了一些姓氏的集中分布。
