Introduction. Analysis of correlations of sexual somatic dimorphism (SD) with the degree of urbanization (quantity of population) and geographic latitude of the residence place is carried out using the material of monitoring of Russian children and adolescents.
Material and methods. The study embraces the wide specter of ethno-territorial samples of children and adolescents from Russia and neighboring countries (literary data), examined through the historic interval 1930-2010 years. To estimate the direction and degree of associations of anthropometric traits (height, weight, chest girth) and ecological factors the classic correlation analysis for pairwise combinations of variables was implemented for age groups of 9-year-old children and 13-year-old adolescents. The quantitative estimation of SD was carried out using Kullback divergence, the analogue of Makhalanobis distance.
Results. Significant correlations of SD of height with both ecological factors for 13-year-old adolescents and SD of weight for 9-year-old children with the quantity of population were fixed on base of the whole data massive. The more homogeneous data base (only Slavonic groups examined in 1960s-1970s) shows significant correlations of latitude with SD of height for 13-year-old adolescents only in combination with the quantity of population of the residence place up to 500 thousands of people; and latitude with SD of weight for 9-year-old children only for million-plus cities. Significant correlations of quantity of population were fixed for SD of height of 13-year-old adolescents in more southern ranges of latitude (37-50degrees), for SD of weight for 9-year-old children in more northern ranges of latitude (50 degrees and more).
Keywords:
anthropological variability; sexual somatic dimorphism; level of urbanization and latitude of the residence place; second childhood; adolescence; quantitative level of anthropoecological correlations
Introduction. In recent years, laser-based rangefinders have been considered as a possible alternative to mechanical anthropometers. One of these instruments is the KAFA-Laser anthropometer (KAFA, Russia). Our aim was to test the accuracy and reproducibility of the KAFA-Laser anthropometer when measuring height of anthropometric points.
Materials and methods. Using anthropometers GPM (DKSH, Switzerland) and KAFA-Laser, paired measurements of the height of 9 anthropometric points were carried out on 10 males aged 18-47 years. The measurements were performed by 3 researchers having different experience, 3 times in succession. The accuracy of measurements with the KAFA-Laser instrument was assessed by comparison with the GPM data. Intergroup differences were assessed using Wilcoxon signed rank test. Technical measurement errors and reliability coefficients were assessed.
Results and discussion. The difference in the height of anthropometric points when measured with the KAFA-Laser and GPM anthropometers significantly depended on the qualification of the measurers and was minimal (+0.0-0.5 cm) for researcher 1, a more experienced user of the KAFA-Laser anthropometer (absence of significant differences for 7 out of 9 points). The mean standard deviations for researcher 1 were lower than those for researchers 2 and 3 and were consistent with traditional anthropometry. Measurements with the GPM anthropometer showed lower individual, inter-individual, and total technical errors. Measurements of the vertex point were characterized by low values of technical measurement errors and high coefficients of reliability (0.94 and 0.95, respectively), and for the remaining points varied widely, which indicates the relevance of implementing objective quality control of anthropometric measurements.
Introduction. The problem of human adaptation to modern realities, including living in cities, changing the traditional diet, and significantly reducing physical stress on the body in everyday life is becoming increasingly relevant all over the world. In this vein, experts from various fields of science pay attention to the study of general secular trends and a more detailed analysis of individual components of this phenomenon, including body composition and other somatic characteristics of specific social and/or gender and age groups of the population. Of particular interest are data on urban populations that have recently migrated from rural areas, against the background of significant socio-economic transformations in the countries of the Global South, as well as a comparison of data from different regions of the world to identify common and population-specific indicators of adaptation.
Materials and methods. The paper presents data on students from three populations (684 individuals, 343 of them men and 341 women): Tanzanian (natives of the Bantu peoples from Dodoma), Russian (residents of Tula) and Buryat (residents of Ulan-Ude). The age ranges from 17 to 30 years, the average age was 21.28±2.75 y. A number of anthropometric characteristics and body composition were measured.
Results. Our data indicate the presence of sexual dimorphism in each of the studied populations according to the complex of morphological characteristics and body composition. It is noteworthy that Russian students (Caucasians) had more pronounced sexual dimorphism compared to Tanzanians (Negroids) and Buryats (Mongoloids).
Introduction. Greek sculpture and vase painting, despite the comprehensive study of specialists in many fields of science, can represent a source of information for historical and biological anthropology. The vase painting and sculpture of the ancient Greeks has been studied in the context of ethnic and biological continuity with the modern Greek population.
Materials and methods. A total of 1020 vases (2379 people) and 174 reliefs (300 people) were studied. Two characteristics were studied – the development of tertiary hair growth (beard growth) and the nature of the head hair of ancient and modern Greeks. The material was collected from online sources and relevant literature, and processed according to anthropological methods. The composite portrait according to F. Galton method in digital format has been used to visualize morphological variability.
Results and discussion. Modern Greeks (the middle total type of the population) are characterized by straight or lightly wavy head hair (middle score 1.41) and most often above middle or heavy beard growth (middle score 3.38). The proportion of straight and wavy hair in all vase painting samples is approximately the same, with wavy hair significantly predominant. The middle scores for hair nature and beard growth based on relief funeral images of ancient Greeks in our samples turned out to be significantly higher than for modern Greeks and amounted to: for nature of the hair – 2,62 points for classical time and 2,81 points for late classical and hellenistic times, for beard growth – 4,38 points and 4,30 points, respectively.
Introduction. The article presents the preliminary results of the anthropological expedition to Barnaul, Altai Krai (Siberian Federal District), conducted in September 2023 in order to study long-term (over the past 70 years) changes in body sizes among modern youth in this region. One of the main practical tasks of the study was the development of relevant standards (reference tables) for assessing the level of physical development of students in Altai Krai.
Materials and methods. The study group consisted of 295 young men and women aged 17–23, mainly (more than 92%) Russians by nationality. Subjects were examined according to a comprehensive anthropometric program including measurement of total body sizes, shoulder and pelvic breadths, trunk and limb circumferences, five skinfolds, and grip strength on right hand.
Results. The average height of young males born in Barnaul increased by 10,5 cm across birth cohorts from the 1930s to the 2000-2006s. The rate of secular increase in height is about 1,5 cm per decade. Intergroup comparisons of body height in female samples from Barnaul demonstrated an increase in height in modern women by 5 cm compared with the cohorts born in the 1940s (about 0,8 cm per decade). Long-term changes in anthropometric parameters in Barnaul are comparable with the general secular trend in Russia and consistent with the hypothesis of the dominant influence of socio-economic factors on intergenerational transformation of the physique of children, adolescents, and young adults.
Introduction.
Primates living in groups in the laboratory can exhibit a wide range of behaviors consistent with their natural behavioral repertoire. The study of adolescent macaques’ behavior grouped together in new social group is of interest for understanding the social organization of preschool children, as well as for anthropology in general. The goal of the work is to reveal the individual and sex differences of behavioral activity of unrelated adolescent rhesus monkeys (Macaca mulatta), grouped in new laboratory conditions.
Materials and methods. We conducted focal observations recording the behavior activity of each macaque in the first two months of their cohabitation. We analyzed individual and sex differences in the manifestation of locomotor, exploratory and social behavior.
Results.
Individual characteristics of macaques for each type of behavior were identified. The group turned out to be the most heterogeneous in the degree of manifestation of exploratory behavior. The exploratory activity of females was significantly higher than that of males. Social activity was significantly higher in males due to the predominance of friendly reactions, although aggression was equally demonstrated in both sexes. However, females were significantly more often exposed to aggression from other individuals than they showed it themselves. As for males, aggression towards other individuals and aggression from other individuals did not differ significantly. Most individuals in the group demonstrated more friendliness reactions than aggression, but two macaques showed these types of behavior equally. There were no differences in the number of locomotor reactions between males and females.
Introduction. The purpose of the study is to characterize and to compare the indicators of fat deposition and body composition in groups of urban children and adolescents of the Republic of Mongolia in various living conditions.
Materials and methods. The material for this study was the results of a comprehensive survey of 5 612 Mongolian children and adolescents aged 9-17 years (born and permanently residing in the capital city of Ulaanbaatar). In accordance with the objectives of the study, the body circumferences, the skinfolds, as well as the body mass components evaluated by bioimpedance technique were analyzed.
Results. Based on the obtained statistical parameters of the studied features, as well as on the results of their comparison in the studied groups, it can be concluded that the value of most of the considered indicators in children and adolescents living in apartments is higher than in their peers living in yurts.
Discussion. The increase in body weight in boys living in the apartments, recorded according to the results of our previous work, is associated with an increase in active cell mass, and, as a result, – lean body mass. To a lesser extent, judging by the existing differences, its value is influenced by the fat component. While the parameters of fat deposition show a small number of significant differences, unlike circumferences, it can also be concluded that the variability of the girths is more associated with the development of the muscular component. Similar patterns were obtained for girls. However, in this case they are less pronounced, but also correspond to the previously obtained results.
Introduction. In 2023, Russian science celebrated the 140th anniversary of the birth of D.N. Anuchin, a scientist-encyclopedist and prominent specialist in the fields of anthropology, ethnology, geography, archaeology, and a promoter and popularizer of science.
Materials and methods. Literary sources were used. Analytical and chronological research methods were applied in the study.
Introduction. The formation of the gene pool of modern Khakas people occurred through the interaction of various groups of ancient inhabitants of the Minusinsk Basin. This article is focused on the inter-group analysis of craniological series representing different Khakassian subethnic groups.
Materials and Methods. The cranial series of the Kachins, Koibals, Sagais, and Beltirs was studied using the battery of 36 cranial non-metric characteristics. The obtained data was compared with data on other populations of Southern and Western Siberia: Shors, Tuvans, Telengits, Selkups, Khants, and Mansis. The analysis of the biological diversity of populations was carried out using Smith's mean measure of divergence (MMD) followed by multidimensional scaling and cluster analysis.
Results. The Kachins are the most distant from the other Khakas subethnic groups, forming a cluster with the Telengits and Tuvans. The Koibals and Beltirs were positioned quite close to the Shors. The Sagais occupied a separate position in the Khakas cluster, presumably due to a greater proportion of Europoid admixture compared to other Khakas groups. The pooled Khakas sample shares similar cranial non-metric characteristics with Turkic-speaking ethnic groups of Southern Siberia: Shors, Telengits, and Tuvans.
Discussion. The nature of phenetic differentiation of the Khakas sub-ethnic groups presumably reveals their complex population history. The position of the Kachins outside the Khakas cluster based on non-metric traits resulted from specificity of their phenofund, which is also supported by molecular genetic data. The similarity in the phenofund of the Khakas groups to those of the Tuvans and Telengits may result from gene flow between Khakas populations and the peoples of Southern Siberia or/and from their common episodes in their ethnogenesis. The similarity between pooled Khakassian sample and the Shors presumably suggests involvement of common genetic components in the gene pools of these peoples, which is consistent with molecular genetic data.
Introduction. The Y-gene pool of the southern Tuvan tribal groups – Soyan and Choodu – was first studied and their comparative analysis with representatives of Kyrgys (south-east of Tuva) and Oorzhak (west of Tuva) tribal groups was carried out. Purpose of the study: to determine the genetic status of the Soyan and Choodu tribal groups within the genetic landscape of the population of Southern Siberia.
Materials and methods. The sample (total N=150) included samples from representatives of Oorzhak (N=42), Soyan (N=29), Kyrgys (N=46) and Choodu (N=33) tribal groups. The genotyping panel included 60 SNP-markers of Y-chromosome, characteristic of the populations of Northern Eurasia.
Results. In the gene pools of studied tribal groups, 27 branches of 7 large haplogroups (C2, J2, N1, O, R1a, R1b) of Y-chromosome were identified. The main part of Choodu, Oorzhak, Soyan gene pools is represented by “North Eurasian” haplogroups (N1, Q) and Kyrgys gene pool is dominated by “East Eurasian” haplogroups C2 and O. The “West-Eurasian” haplogroups, mainly represented by subhaplogroup R1a1a-Z93, account for less than a quarter of the gene pool of all four studied groups, without revealing a clear geographical trend. In the genetic space of the population of Southern Siberia the Soyan, Choodu and Kyrgys, together with other of Tuvan tribal groups, formed the Tuvan-Tofalar claster. Tuvan-Tofalar, Altai and Khakass clusters indicate three sources of gene pool of the indigenous population of Southern Siberia. Maps of genetic distances showed greater similarity of the Soyan and Choodu with the rest of Tuvan tribal groups than with other populations of Southern Siberia. But the map of genetic distances from Kyrgyz reveals a different pattern: areal of genetically similar populations is more extensive, covering southern and southeastern Tuva, Mongolia and western Buryatia.
Introduction. Several studies have demonstrated a correlation between variations in genes regulating human uncoupling proteins (UCP) and environmental factors. However, information on the intra- and interpopulation diversity of allele and genotype frequencies of UCP1 and UCP3 within the territory of Russia remains insufficient. This study aims to investigate the intra- and inter-ethnic variability of genetic determinants of activity of uncoupling proteins UCP1 and UCP3, and to evaluate genotype-environment associations in the populations residing in the northeastern region of Russia.
Materials and methods. Genotyping was conducted on a total of 1,698 biological specimens collected from individuals representing 22 population groups of European Russia, Siberia, and the Russian Far East. Geographical and climatic data spanning from 1940 to 2023 were gathered for each sample collection locality.
Results and discussion. The spatial distribution of genetic determinants affecting the activity of UCP1 and UCP3 uncoupling proteins demonstrates a correlation with the severity of natural conditions. Three regression models of allele frequencies were constructed using climatic characteristics as predictors. All models are statistically significant (p<0.05 in all cases) and explain 39%, 36%, and 64% of the variability in UCP1 (rs6536991, rs1800592) and UCP3 (rs1800849) allele frequencies, respectively. These correlations revealed by the models confirm the adaptability of UCP genes in the indigenous population groups of Northern Eurasia.
Introduction. This research examines and evaluates the comparability of a specific set of anthropometric measurements of facial features obtained through direct measurements and frontal portrait photographs. With the growing trend towards utilizing photography instead of direct measurements, the question of the convergence and comparability between these two methods has become increasingly significant.
Materials and methods. The study was conducted on a sample population of Chuvash individuals, who represent the indigenous population in the Chuvash Republic of the Russian Federation. The material for the study comprised cephalometric data and anthropological photographs of individuals from the Chuvash Republic, surveyed during the 2002 expedition under the guidance of V.A. Batsevich. The sample size consisted of 72 individuals, with 35 women and 37 men. Prior to statistical analysis, the male and female participants were divided into two age groups to account for potential age-related variations. Statistical analysis was conducted using the SPSS software package, applying Cronbach's alpha method.
Results. In this study, gender differences were identified for a range of anthropometric indicators, demonstrating high convergence when employing two facial measurement methods. The obtained values of dimensions were generally comparable in terms of reliability and consistency.
Introduction. The authors consider the features of genetic determinants of disaccharide assimilation as the corollary of adaptation to the environment. The aim of the study was to assess the polymorphism of the genes that determine activity of disaccharidase enzymes lactase (LCT, rs4988235), trehalase (TREH, rs2276064) and sucrase-isomaltase (SI, rs781470490) in different territorial groups of Evenks.
Materials and methods. Biomaterial samples from 1365 unrelated individuals representing 15 ethno-territorial population groups in European Russia, Siberia, and the Far East of the Russian Federation were genotyped. "Focus" groups include "Western" (N=65), "Transbaikal" (N=50), and "Okhotsk" (N=81) Evenks (Krasnoyarsk Krai, Northern Transbaikalia, Okhotsk-Aldan region). The other study groups allow us to assess the specificity of the distribution of genetic determinants of disaccharide assimilation in populations that differ from racial, ecological, and subsistence perspectives.
Results. The Evenki territory subgroups do not differ from each other in terms of allele frequencies and genotype distribution of LCT (p>0.2) and TREH (p>0.8) and are similar to Yakuts, Buryats, Mongols, and populations of the Far East and Chukotka. The SI delAG deletion was not found in the Western Evenki subgroup.
Introduction. In families with such a child his/her siblings often live, whose development will be affected by the current stressful situation for all family members. Siblings of cancer patients appear to be a psychological vulnerable group, as they have low self-esteem, fear of death and loneliness, anxiety, anger.
The study aimed to assess the level of physical development (PD) of children, treated for brain tumors, and siblings of childhood cancer survivors, in relation to stressful circumstances of living in a family with an oncological relative.
Material and methods. The study involved children aged 6 to 17 years who had completed treatment for a brain tumor (BT), as well as siblings of children with various cancer types. We measured 27 boys and 36 girls with BT, the sample of siblings included 26 boys and 31 girls. To assess the compliance of the level of PD of children of both groups with age standards, for each child of a given gender and age a centile corridor was determined by body length (BL) and BMI, and individual values of signs were ranked in Z-points, using WHO standards. A detailed questionnaire was conducted to assess some characteristics of a child's family environment. Statistics analysis was performed with Statistica 12 software package.
Results. For a group of children with BT, a significant shift in the distribution of PD scores along body length and BMI towards low values was found, for a group of siblings, the opposite picture was obtained – the distribution of body length and BMI scores shifted to the higher values. It has been shown that higher developmental scores in body length are significantly more common in children who are older siblings in relation to patients with BT.
Introduction. The goal of study is description of secular dynamics of sex dimorphism (SD) of height, weight, chest girth of children aged 9 years and teenagers 13 years old from Russia and neighboring countries through 1920–2010.
Materials and methods. The main source of data — materials of books on physical development of children and adolescents from cities and rural regions of Russia and USSR, collected and processed according to the universal methodical standards of Research Institute of Hygiene of children and adolescents. The quantitative estimation of SD value was held using Kullback divergence. One-year age groups, contrastive in biological essence, are under discussion. The estimation of the vector and level of associations of SD of anthropometric traits and secular factor was held using correlation analysis. The analysis of local patterns of secular SD dynamics of separate traits was carried out.
Results. Secular variability of height and weight SD of 9-year-old children is not significant. While secular dynamics of three body dimensions of 13-year-old teenagers is significant, the highest determination coefficient is fixed for weight. For Moscow samples the decrease of height and weight SD is fixed through the historic interval 1960s – 70s with the following recovery up to the level of 1920s in 2000s. Temporal dynamics of SD of 9-year-old children of St. Petersburg through the interval 1960s – 2000s consists of macrosomization of girls; the tendency for 13-year-old teenagers is opposite. Temporal dynamics of somatic SD of 9-year-old Russian children of Kazan reveals stability through the interval 1960th-1990th; for 13-year-old teenagers’ parameters of transversal body development demonstrate secular stability, as to height – boys compensate their lag compared to girls. For Kirovsk city (Murmansk region) through the interval 1950s – 1970s temporal fluctuations of height and weight SD of 9-year-old children are less than 0,2 standard deviations; height and weight SD of 13-year-old teenagers reveal temporal increase (0,4–0,6 standard deviations).
Keywords:
anthropological variability; quality of environment; quantitative analysis of secular dynamics of sexual somatic dimorphism; second childhood; puberty; level of urbanization; ethnogenetic factor
