Multivariate approach to matrimonial mobility in Catalonia

Area of Science:

• Anthropology
• Demography
• Population Genetics

Background:

• Understanding population structure and gene flow is crucial for evolutionary and demographic studies.
• Matrimonial mobility patterns serve as a proxy for gene flow and social interaction.
• Previous studies have explored migration patterns, but detailed regional analyses are often lacking.

Purpose of the Study:

• To analyze matrimonial mobility and gene flow across Catalonia using census data.
• To identify spatial patterns and discontinuities in spouse geographic origin.
• To investigate the influence of geographic divisions (comarques) on marriage patterns.

Main Methods:

• Utilized 1986 census data for Catalonia.
• Defined comarca (geographic division) as the population unit.
• Applied multivariate statistical methods from numerical taxonomy to analyze affinity (statistical distance) between comarques in spouse origin.

Main Results:

• Identified a three-level pattern of gene flow: strong endogamy within comarques, a 100-km matrimonial radius, and central attraction to Barcelona.
• Observed that matrimonial mobility regionalization closely aligns with distinct geographic groupings of comarques.
• Demonstrated discontinuities in gene flow correlating with geographic and social structures.

Conclusions:

• Matrimonial mobility in Catalonia exhibits clear spatial structuring influenced by geography and urban centers.
• The findings highlight the importance of local endogamy and regional connectivity in shaping population genetic structure.
• The study provides a detailed spatial model of gene flow relevant to understanding population dynamics.