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Publications (31)
A data mining technique called Self-Organized Maps (SOM) was used to select the surnames with populational information (monophyletic) to be used in the reconstruction of past demographic processes, in order to show the historical population migrations that have generated the current structure of the Spanish population. The technique made possible t...
It is widely recognised that conservation policies in protected areas must also favour the development and viability of human populations. Although much research has focused on economic consequences, understanding the real impact of conservation on local populations requires a more holistic standpoint. Using quasi-experimental matching methods and...
Since domestication, a large number of livestock breeds adapted to local conditions have been created by natural and artificial selection, representing one of the most powerful ways in which human groups have constructed niches to meet their need. Although many authors have described local breeds as the result of culturally and environmentally medi...
In a previous study concerning 33,753 single Spanish surnames (considered as tokens) occurring 51,419,788 times we have shown that the present-day geography of contemporary surname variability in Spain still corresponds to the political geography of the country at the end of the Middle Ages. Here we reprocess the same database, by clustering surnam...
To assess whether the present-day geographical variability of Spanish surnames mirrors historical phenomena occurred at the times of their introduction (13th-16th century), and to infer the possible effect of foreign immigration (about 11% of present-day) on the observed patterns of diversity, we have analyzed the frequency distribution of 33,753 u...
In this work the level and structure of consanguinity is analysed in two Spanish rural regions of similar geographic and orographic characteristics for the period between 1880 and 1979, employing two different methodologies. The estimates according dispensations shows that the total levels (alpha4 = 0.00552 in La Cabrera and 0.00405 in Fuentes Carr...
The biodemography of isolated populations with a subsistence economy is of special interest because the conditions to which the populations have been subjected are similar to those present over a large part of the history of our species, and hence the conclusions drawn can be extrapolated to other similar populations. In the present work, we used t...
The mating pattern in a population determines the next generation gene pool and therefore its genetic structure. Besides socio-cultural and geographic factors, political barriers may influence the formation of couples. The present paper studies how the change of national border affected the mating pattern of Olivenza in Badajoz Province (Spain), wh...
Family reconstitution has provided knowledge about the reproductive performance of mates from La Cabrera (northwest Spain). The analysis of 2293 reconstituted families (7872 births corresponding to parities 2 to 10) was restricted to the period 1880 to 1929. The proportion of infant deaths (younger than 1 year) was calculated regarding the precedin...
The genetic structure of La Cabrera (province of Léon, Spain), a highly isolated and inbred population (alpha3 = 0.00482), is analyzed by applying multivariate methods (nonmetric multidimensional scaling, Mantel test, Monmonier's algorithm) to different biodemographic data sets. Isonymy, parent-offspring migration (total, males, females), and marit...
La Cabrera (northwest Spain), the study area, during most of the period examined (1880-1969) was characterized by high inbreeding levels and internal subdivision, which probably favoured the action of genetic drift and genetic differentiation. Indices regarding potential selection based on variables related to the reproductive pattern of reconstitu...
El sistema de cruzamientos de una población determina su estructura genética, ya que de aquél dependerá que los genes de una generación persistan en la siguiente. La elección de cónyuge está condicionada principalmente por factores socioculturales y geográficos; la existencia de barreras políticas constituye un caso particular. Con el propósito de...
El uso de apellidos ha sido frecuente en el estudio de la estructura genética de las poblaciones humanas mediante varios métodos. Existe una amplia bibliografía sobre isonimia referida a regiones y países muy diversos, y por tanto con distintos sistemas de transmisión de apellidos entre generaciones. En Portugal, para periodos históricos, varios au...
Biodemographic methods are widely used to infer the genetic structure of human populations. In this study, we revise and standardize the procedures required by the migration matrix model of Malécot ([1950] Ann Univ Lyon Sci [A] 13:37-60), testing it in large historical-demographic databases of 85 populations from three mountain valleys with differe...
Among determinants of the structure of human populations, consanguineous marriages can be useful in determining to what extent they influence the genetic structure of the population. This knowledge may be gained by comparing the reproductive performance of related and non-related couples. The population studied, La Cabrera, is a mountainous region...
In this study the structure of the mortality of two groups of infants settled in the same environmental context is analysed: the comarca (a typical Spanish sub-division of territory) of La Cabrera (province of León, Spain) between the years 1880 and 1932. In this geographical region of the northwest of Spain two communities of infants from differen...
Marital structure and inbreeding coefficients were analyzed in La Cabrera, an isolated mountain region in northwestern Spain. A total of 5,714 marriages were celebrated from 1880 to 1989 in the 37 parishes of the area. The total frequency of consanguineous marriages (up to the fourth degree) is 23.05%; multiple consanguineous marriages are remarkab...
En este trabajo, se analizan algunas variables familiares que describen el ciclo reproductor de las familias cabreriresas, valorándose sus modificaciones desde 1880 hasta 1989. A lo largo de los 110 años estudiados se ha detectado un importante retroceso de la fertilidad, junto a un descenso de la mortalidad infantil y juvenil que se han materializ...
Resume. — Nous avons quantifie les taux de fecondite, de mortalite infantile et de survie a l'âge reproducteur dans les familles qui ont habite la region de Fuentes Carrionas durant la periode comprise entre 1 880 et 1979. Les resultats indiquent une fecondite elevee ainsi qu'une forte mortalite infantile et prereproductrice, principalement entre 1...
In this research an adult man (30-35 years) from monasterio de Prado necropolis (Vallado - lid) is studied; the chronology belongs to the Modern Age. In this case we have diagnosed the presence of a very hard Monteggia's fracture-dislocation. Inicially the lession it's due to a complete fracture at ulna's superior third and as a consequence the rad...