Inter-racial Marriages in South Africa

Jacobson, Cardell K.; Amoateng, Acheampong Yaw; Heaton, Tim B.

doi:10.3138/jcfs.35.3.443

Cited by 32 publications

(21 citation statements)

References 6 publications

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“…While it was found that the groups vary significantly from each other, the difference between Black and Colored individuals was found to be less than between either of these groups and the White group, as reflected in the Mahalanobis distances between the groups. This is also in agreement with the results of the study by Stull et al (16), as well as historical and genetic studies of these populations (22,23,57,65). It is thus not surprising that the accuracy of ancestry estimation using the detected morphological variation of the cranium resulted in significantly higher accuracies for the White individuals (90.2%) than for the Black and Colored individuals (82.0% and 78.2%, respectively).…”

Section: Ancestrysupporting

confidence: 91%

Morphometric Analysis of the Neurocranium in an Adult South African Cadaveric Sample,

Maass

Friedling

2018

Journal of Forensic Sciences

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Craniometric studies of South Africans yield high accuracies of sex and ancestry classification, but most assess only inter-group variation of Black and White individuals, excluding the highly heterogeneous Colored group, which constitute a significant proportion of the population. This study applied a geometric morphometric approach to the neurocrania of 774 Black, Colored, and White individuals to assess sex and ancestry estimation accuracy based on the detected morphological variation. Accuracies of 70% and 83% were achieved for sex and ancestry, respectively, with ancestry-related variation contributing the largest proportion of overall observed variation. Even when comparing the closely related Black and Colored groups, relatively high accuracies were obtained. It is thus recommended that a similar approach be used to develop a contemporary three-dimensional database, which can be used to objectively, reliably, and accurately classify unknown remains in the South African forensic context.

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Section: Ancestrysupporting

confidence: 91%

Morphometric Analysis of the Neurocranium in an Adult South African Cadaveric Sample,

Maass

Friedling

2018

Journal of Forensic Sciences

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“…Comparable percentages for other countries suggest that the black-white boundary is stronger elsewhere. In the United States in the 1990s, only 8% of black men is married outside the group (Qian, 1997) and in South Africa, this is even rarer (Jacobson, Amoateng, & Heaton, 2004). In England, about 16-18% of foreign-born black men are married to a native white partner (Model & Fisher, 2002).…”

Section: Conclusion and Discussionmentioning

confidence: 98%

Ethnic intermarriage in the Netherlands: confirmations and refutations of accepted insights

Kalmijn¹,

Tubergen²

2006

Eur J Population

181

191

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Previous studies on ethnic intermarriage have been done mainly in the United States and in other classical immigration countries. This article examines ethnic intermarriage among Surinamese, Dutch Antilleans, Turks, and Moroccans in the Netherlands. From a theoretical and empirical perspective, it is important to examine whether patterns observed earlier in traditional immigrant countries equally apply to the Dutch context. To obtain a sufficiently large sample, this study pools five nationally representative surveys, conducted in the period 1988-2002. In line with findings documented before, it observes that ethnic exogamy occurs more frequently among the second generation, and among those who arrived at a younger age, and who are higher educated. Equally corresponding to previous work, the study reports that ethnic intermarriage is more frequent when the group-specific sex ratio is more uneven and when the ethnic group is predominantly second generation. Contrary to findings observed elsewhere, results show that the black Surinamese and Dutch Antilleans have high intermarriage rates and that there is little evidence for status exchange in mixed marriages.Ré sumé Les é tudes anté rieures sur les mariages inter-ethniques ont é té ré alisé es essentiellement aux Etats-Unis et dans d'autres pays classiques d'immigration. Cet article examine les mariages mixtes inter-ethniques entre ressortissants originaires du Surinam, des Antilles né erlandaises, de Turquie et du Maroc aux Pays-Bas. D'un point de vue thé orique et empirique, il est important de savoir si les sché mas observé s à ce jour dans les pays d'immigration s'appliquent é galement au contexte né erlandais. Pour obtenir un é chantillon suffisamment grand, cette é tude rassemble cinq enquê tes repré sentatives à l'é chelle nationale, mené es entre 1988 et 2002. En accord avec les ré sultats de la litté rature, nous observons que l'exogamie ethnique est plus fré quente dans la seconde gé né ration, parmi ceux qui ont immigré à un â ge plus jeune, et parmi les plus instruits. De la mê me façon, nous observons que les mariages mixtes inter-ethniques sont plus fré quents quand le sex ratio du groupe est dé sé quilibré et quand le groupe est constitué en majorité de migrants de seconde gé né ration. A l'opposé de la litté rature, nous observons que les ressortissants noirs du Surinam et ceux des Antilles né erlandaises ont des taux é levé s de mariages mixtes, et il ne semble pas qu'il y ait d' «é change de statuts» dans les mariages mixtes.

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“…For example, scenarios of preference for or against new migrants compared to other admixed individuals have been hypothesized in swordfish, butterflies, and grasshoppers (R ITCHIE et al ., 1989; H OWARD , 1993; D UENEZ -G UZMAN et al ., 2009; M ELO et al ., 2009; S CHUMER et al ., 2017). Similarly, in admixed human populations, language barriers or social identities may produce population-based preferences (Q IAN , 1997; J ACOBSON et al ., 2004; R UIZ -L INARES et al ., 2014).…”

Section: Discussionmentioning

confidence: 99%

“…A particular form of assortative mating by admixture can be more specifically characterized as assortative mating by source population (R ITCHIE et al ., 1989; H OWARD , 1993; D UENEZ -G UZMAN et al ., 2009; M ELO et al ., 2009; R UIZ -L INARES et al ., 2014; S CHUMER et al ., 2017). In this type of assortative mating by admixture, different groups—source populations and admixed populations, for example—come to have distinct geographic locations, trait preferences, host preferences, or in the case of human populations, social identities (Q IAN , 1997; J ACOBSON et al ., 2004). Individual ancestry levels within the admixed group are less important for mating choices than the group membership itself.…”

Section: Introductionmentioning

confidence: 99%

Assortative mating by population of origin in a mechanistic model of admixture

Goldberg

Rastogi

Rosenberg

2019

Preprint

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AbstractPopulations whose mating pairs have levels of similarity in phenotypes or genotypes that differ systematically from the level expected under random mating are described as experiencing assortative mating. Excess similarity in mating pairs is termed positive assortative mating, and excess dissimilarity is negative assortative mating. In humans, empirical studies suggest that mating pairs from various admixed populations—whose ancestry derives from two or more source populations—possess correlated ancestry components that indicate the occurrence of positive assortative mating on the basis of ancestry. Generalizing a two-sex mechanistic admixture model, we devise a model of one form of ancestry-assortative mating that occurs through preferential mating based on source population. Under the model, we study the moments of the admixture fraction distribution for different assumptions about mating preferences, including both positive and negative assortative mating by population. We consider the special cases of assortative mating by population that involve a single admixture event and that consider a model of constant contributions to the admixed population over time. We demonstrate that whereas the mean admixture under assortative mating is equivalent to that of a corresponding randomly mating population, the variance of admixture depends on the level and direction of assortative mating. In contrast to standard settings in which positive assortment increases variation within a population, certain assortative mating scenarios allow the variance of admixture to decrease relative to a corresponding randomly mating population: with the three populations we consider, the variance-increasing effect of positive assortative mating within a population might be overwhelmed by a variance-decreasing effect emerging from mating preferences involving other pairs of populations. The effect of assortative mating is smaller on the X chromosome than the autosomes because inheritance of the X in males depends only on the mother’s ancestry, not on the mating pair. Because the variance of admixture is informative about the timing of admixture and possibly about sex-biased admixture contributions, the effects of assortative mating are important to consider in inferring features of population history from distributions of admixture values. Our model provides a framework to quantitatively study assortative mating under flexible scenarios of admixture over time.

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Inter-racial Marriages in South Africa

Cited by 32 publications

References 6 publications

Morphometric Analysis of the Neurocranium in an Adult South African Cadaveric Sample,

Morphometric Analysis of the Neurocranium in an Adult South African Cadaveric Sample,

Ethnic intermarriage in the Netherlands: confirmations and refutations of accepted insights

Assortative mating by population of origin in a mechanistic model of admixture

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