Offspring from endogamic vs. exogamic matings: Absence of anthropometric differences among Sardinian children (Italy).

This study evaluates possible differences in body dimensions among children from matings of different exogamy levels. The cross-sectional sample consisted of 867 children, 435 males, and 432 females, 6-10 years old, attending elementary schools in the metropolitan area of Cagliari, the capital of Sardinia (Italy). The children were divided into two groups according to the level of exogamy. The first group consisted of children of parents born in the same Sardinian municipality and was considered endogamous sensu stricto. The second group included children of parents born in municipalities from different Sardinian linguistic domains and was considered exogamous. The Mann-Whitney test did not reveal significant differences between the two groups of children in the mean rank values of the 36 anthropometric variables considered, with the exception of cephalic circumference in males and chest depth in females. In particular, there were no significant differences for anthropometric variables considered to be indirect indicators of nutritional status: sum of skinfolds, waist/hip ratio, body mass index, total upper arm area, upper arm muscle area, and upper arm fat area. The results indicate that Sardinian children from marriages of different exogamy levels do not differ in body dimensions if they grow up with similar nutritional and socioeconomic conditions.

Women's height in several African countries in the first half of the 20th century.

Height and its variations in time are considered useful indicators of living conditions in countries and in periods where no written sources are available. Majority of data refer to male stature, whereas data concerning female stature are limited and cover only a short span. This paper investigates the height of 456 women in 6 African countries, born around the end of the 19th century and the beginning of the 20th century. The objective is to provide information on the stature of females from those areas at that time and to compare the results with those from the literature, which refer to more recent times. Data were recovered from original individual forms and/or monographs of the time, and when possible, changes in mean statures were reported, considering two age classes: 20.0-29.9 years and 30.0 years and over. Individual heights were plotted according to year of birth. The main results show tendencies toward height increases in Eritrea and Ethiopia, stable values of stature in Somalia and decreasing heights in women mainly from the oases in Cyrenaica. It has been suggested that these results may reflect the synergic action, with different local modes and intensity, of a changing model of slavery in force at the time, lack of constituted states and continuing civil wars among different ethnic groups, and of an effect of severe droughts in the period under consideration. A comparison with data available on modern populations from 4 of the investigated countries shows that this trend has since changed. Further insights into this suggested trend may be gained from the study of male series.

Seasonality of marriages and ecological contexts in rural communities of central-southern Italy (Abruzzo), 1500-1871.

The seasonality of 27,705 marriages celebrated in a four century span in the Province of Teramo (Abruzzo, Italy) was analyzed to identify the presence of a long-term pattern related to the prevailing subsistence activity and the main factors affecting it. The results show general agreement in all centuries with the agricultural patterns of other lowland or south-central Italian groups (Piedmont, Veneto, Liguria, Emilia Romagna, Tuscany, Latium, Compania, Apulia) and Mediterranean regions (Spain, France), although with some differences. Religious factors strongly affected the timing of marriage only during Lent. Of interest is the progressive increase through the centuries of marriages in the summer-autumn months, associated with a decrease in January and February. This suggests the passage from a summer migration system to a rural sedentary system with occasional seasonal work.

Seasonality of births and conceptions in a pastoral community of the province of l'Aquila (Abruzzo, Italy), 1802-1965.

Natality rates and seasonality of births and conceptions were analyzed from 6,116 birth records in the pastoral community of Roio (Abruzzo, Italy) from 1802 to 1965. Gross natality rates averaged 25.5 x 1000 in the past, lower than those reported for agricultural groups. Seasonality of births showed a marked pattern: 807-67% of births occurred in the first six months of the year. The monthly distribution of conceptions was compared to that of marriages. The results show a high correlation in the 19th century and a lower one in the 20th century. These findings suggest that pastoralism acted as a primary regulator of reproduction in this community.

Determinants of marital behaviour in five Apennine communities of Central Italy inferred by surname analysis, repeated pairs and kinship estimates.

The work makes use of surname analysis, repeated pairs and kinship estimates in 11,009 marriage records celebrated in five communities of the Italian Central Apennine (Celano, Lecce dei Marsi, Ortucchio, Roio, Villavallelonga) from 1802 to 1965 with the objective to deepen knowledge of the relative influence of several determinants on their marital behaviour. These towns are part of the same geographic and economic environment: the slopes of the ancient Fucino Lake. This work further elaborates the results from previous studies on the bio-demographic model of the region. The data were analyzed according to three periods of approximately 50 years. Results show the highest inbreeding coefficients in the pastoral towns of Roio and Villavallelonga. Repeated pair analysis highlights a certain degree of population subdivision which declined in time in Celano, Lecce dei Marsi and Ortucchio. The highest and increasing values of RP-RPr in time in Roio suggest a general reduction in genetic heterogeneity. This is possibly due to the celebration of marriages among families selected on the economic basis of pastoralism, as this town historically has had a leading tradition of sheep-farming. Villavallelonga, excluding isonymous marriages, shows an increase in repeated pair unions in time, thus revealing a substructure with marriages among preferred lineages. This is in line with previous results on consanguineous marriages which indicated the tendency of avoiding unions between close relatives in this small geographic isolate. This study demonstrates the influence of geographical (altitude) and social factors (pastoralism) on the marital structures of the investigated populations.

Use of isonymous marriages in the study of consanguinity.

"In a previous investigation the distribution of isonymous marriages was traced for the last 160 years in Civitella del Tronto [Italy]. In this report the authors test the reliability of the method, by verifying if isonymous mates actually descend from a common ancestor. The family menages of the three families with the highest rate of isonymous marriages [during the period 1810-1969] were reconstructed over 10-11 generations." (SUMMARY IN FRE AND ITA)

Marital mobility in the municipal area of Civitella del Tronto (Teramo, Abruzzo) from the XVII century to 1979.

PIP: Geographic distance between gene pools is studied by analyzing marital mobility in Civitella del Tronto, Italy, from the early 1600s to 1979. The purpose is to examine changes in kinship and consanguinity in the population. (SUMMARY IN FRE AND ITA)^ieng

Marital structure of the Italian community of Boston, Massachusetts, 1880-1920.

The marital structure of Italians living in Boston, Massachusetts, in the period 1880-1920 was studied in order to explore the integration process in the urban context. The study analyses endogamy and inbreeding, using data on 15,579 marriages from the parish books of the three Italian parishes of Boston. Endogamic rates are very high and increased in time, ranging from 93.9% to 97.3%. This correlated with the growth of the Italian community and the decline of the biased sex ratio. One parish, Our Lady of Pompeii in the South End, displays lower endogamic rates because of the reduced and scattered population attending it. The rate of consanguineous (2.33%) and isonymous (6.38%) marriages, and the coefficients of inbreeding, alpha (0.98 x 10(-3)) and Ft (0.0159), are similar to those of north Italian populations, and lower than those for south and insular Italy. The parish of Our Lady of Pompeii shows consistently higher values than the other two parishes. Marriages between first and second cousins are the main cause of the above values in each parish. Consanguineous marriages and inbreeding increased over time, from the 1890s, and this is in general agreement, although slightly delayed, with the Italian trend.

Biodemographic study of a central Apennine area (Italy) in the 19th and 20th centuries: marriage seasonality and reproductive isolation.

This study investigates seasonality of marriages and reproductive isolation in six long-isolated communities in the central Apennines (Italy). It had two objectives: (1) the identification of an Apennine biodemographic model in comparison with mountain communities of other regions, and with non-Apennine communities in Abruzzo, and (2) to identify the possible effects of the drainage of Lake Fucino (1854-1876) on that area. Marriages in this region show two very stable seasonal patterns: one is typical of sedentary rural societies, with summer migrations and marriages preferentially celebrated in the winter, and the other has marriages that are strongly concentrated in the summer months, i.e. between 75% and 93.5% of marriages were celebrated between June and October in these communities in the 1800s. These were traditionally pastoral communities with winter transhumance of the flocks and their shepherds towards the lowlands of southern Italy. In both groups, restrictions imposed by the Catholic Church do not seem to have affected the timing of marriages. Indeed, economic factors related to work activities seem to have had more influence. Concerning reproductive isolation, the results show high rates of endogamy: between 85% and 98% in both the 19th and 20th centuries. Rates of consanguineous marriages were between 5% and 20%, and those of isonymous marriages rarely exceeded 9%. The coefficient of inbreeding a shows that there was a delayed, limited period of increased consanguinity in the few decades around the turn of the century. This is different from the national situation, and thus could be a consequence of the Lake Fucino drainage.

Endogamy and inbreeding since the 17th century in past malarial communities in the Province of Cosenza (Calabria, Southern, Italy).

Many authors stressed the importance of considering mating patterns, migration and consanguinity when analysing micro-geographic differences in the distribution of the frequency of genetic traits (thalassaemia and glucose 6 phosphate dehydrogenase deficiency (G6PD) in populations living in areas of past malarial endemy. Therefore, the present work was aimed at estimating the reproductive isolation of Calabria, an Italian region that experienced endemic malaria until very recently. The research was carried out on 15311 records of marriage from Parish Books of four villages located in the past malarial area, and four situated in the non-malarial region. Endogamy rates were high in every village and decreased only in the present century as a consequence of the breakdown of isolation. In the earlier periods, the rates ranged between 93-84% in non-malarial villages, and between 96-66% in the past malarial area. The rate of consanguineous marriages was low in all villages: in the malarial area it was 2.15% on average, whereas in the non-malarial villages it ranged between 2-16%. Its trend increased with time almost everywhere. Concerning values, differences between past malarial and non-malarial villages in earlier periods are not consistent as they ranged from 0.1 x 10(-3) to 1 x 10(-3). In the present century, however, a was higher in the non-malarial villages. Observed changes of the coefficient a since the 19th century are due to the increased frequency of first cousin marriages. Isonymy rates were lower than 2% in all past malarial towns in all periods, whereas in nonmalarial villages they ranged between 1.2-9.5% and increased with time. Inbreeding coefficients F are always higher than alpha values, but show the same trend with time. They were between 0.0006-0.0045 in past malarial towns, and between 0.0017-0.024 in non-malarial villages. In non-malarial villages Fn displayed noticeable negative values in two situations in the earlier periods. In conclusion, given the above mating patterns and the observed distribution of frequencies of G6PD deficient hemizygous and thalassemic heterozygous in the investigated villages, there is clear evidence in this area for the absence of any specific role of reproductive isolation and consanguinity on the distribution of genetic traits related to past malaria presence.

Height and secular trend in conscripts born in the Central Apennines (Italy), 1865-1972.

OBJECTIVE: The main aim of the research was to evaluate the effects of prolonged isolation on the secular trend of height in an internal zone of the central Apennines (Abruzzo, Province of L'Aquila). METHODS: Personal data for 1006 military conscripts in five sample years from 1865 to 1972 were used. The mean, standard deviation, median, skewness and kurtosis were calculated. Normal distribution of the data was assessed by the Kolmogorov-Smirnov test (Monte Carlo method). Differences between the means were tested by ANOVA and the Tukey test. RESULTS: Mean height increased from 161.3 +/- 5.97 cm in 1865 to 172.6 +/- 6.28 cm in 1972. The increases were slight, but constant, in the first 80 years: between 0.44 and 0.86 cm/decade, but greater thereafter: 2.37 cm/decade between 1945 and 1972. Regarding the frequency distribution, skewness showed negative values only in 1865 (-0.37 +/- 0.21). The Kolmogorov-Smirnov test did not show significance for any period. CONCLUSIONS: The results confirm that the mean heights in south-central Italy, including Abruzzo, were lower than those of the more economically advanced regions of northern Italy in each period. The difference has decreased greatly in the last few generations, but the secular trend is continuing in these communities. This seems to be due to prolonged isolation which has retarded economic development and favoured endogamy and genetic drift. However, it has also prevented the negative effects of wars, since there was no reduction of the secular trend in those periods.

Age of onset of pubertal characteristics in boys aged 6-14 years of the Province of L'Aquila (Abruzzo, Italy).

BACKGROUND: Previous results on growth patterns of children from central-southern Italy (Abruzzo region) showed an increasing tendency to obesity and suggested that the secular trend was still in progress in this region. However, data on pubertal development was lacking. OBJECTIVE: The objective of the study was to provide population data on pubertal development in a sample of 535 boys aged 6-14 years as a contribution to the ongoing debate on earlier onset of pubertal traits and on the slowing down of the secular trend. METHODS: A cross-sectional survey was used. Data for genital and pubic hair development (GD and PHD) were analysed by probit analysis. RESULTS: The boys start developing sexual characteristics at age 9: 13.3% had entered stage 2 of GD and 8.9% showed PHD. At 13 years of age, 5% and 7.4% were still in stage 1 of GD and PHD, respectively, whereas almost one-third had attained stage 5 for both sexual characteristics. The median age for attainment of stage 2 was 11.2 years for GD, 11.5 years for PHD and 11 years for one or both of them. CONCLUSIONS: These results are in line with those for several European and industrialized countries and do not show a significantly earlier onset of sexual maturation.