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5. Dynamics of sexual dimorphism of somatic status of children of early and first childhood from Russia and former USSR through the latest century

Dynamics of sexual dimorphism of somatic status of children of early and first childhood from Russia and former USSR through the latest century

Fedotova T.K., Gorbacheva A.K.

Lomonosov Moscow State University, Anuchin Research Institute and Museum of Anthropology, Mokhovaya st., 11, Moscow, 125009, Russia

Fedotova Tatiana K, PhD., DSc.; ORCID ID: 0000-0001-7750-7924; tatiana.fedotova@mail.ru; Gorbacheva Anna K., PhD.; ORCID ID: 0000-0001-5201-7128; angoria@yandex.ru.

Abstract

Introduction. The goal of study is description of secular dynamics of sexual dimorphism (SD) of main somatic dimensions of children of early and first childhood and its quantitative estimation. Material and methods. The main source of material – books on physical development of children and adolescents of cities of Russia and former USSR, collected and treated according to the common methodical standards of Science Research Institute of Child Hygiene and thus completely comparable. Analysis of material was held in two variants – meta-analysis based on the whole pool of samples and description of the local patterns of secular SD dynamics in connection with the level of anthropogenic pressure of the residence place and ethnicity of samples. The estimation of the vector and level of associations of SD of anthropometric traits and secular factor was held using correlation analysis. The quantitative estimation of SD value was held using Kullback divergence, analogue of Mahalanobis distance. Results. Meta-analysis revealed average temporal stability of somatic SD through the early and first childhood Analysis of SD dynamics of Moscow children revealed some decrease of SD levels in 1970s, in other words temporal macrosomization of Moscow girls as compared to boys. The level of urbanization results in greater macrosomization of boys as compared to girls in environments with higher level of anthropogenic pressure – city with 1 million population quantity compared to the small town with stable quantity of population about 40 000. Ethnic specificity of the vector and velocity of secular SD dynamics is illustrated with the model of Russian and Tatar children of Kazan and Russian and Chuvash children of Cheboksary. Conclusion. The results of study support the fact that higher ecosensitivity to the secular factor is not the prerogative of male sex only; early and first childhood do not give examples of systematic effect of higher ecosensitivity of boys compared to girls of their ethnoterritorial groups to the temporal factor. SD of body dimensions is the autonomic marker of the microevolutionary somatic dynamics through the early and first childhood. The most informative quantitative indicator of intergroup specificity of secular processes is SD of height. @ 2023. This work is licensed under a CC BY 4.0 license

Keywords

anthropological variability; environmental impacts; quantitative analysis of secular dynamics of sexual somatic dimorphism; level of urbanization; ethnogenetic factor

DOI: 10.32521/2074-8132.2023.3.015-026

Цит.: Fedotova T.K., Gorbacheva A.K. Dynamics of sexual dimorphism of somatic status of children of early and first childhood from Russia and former USSR through the latest century // Moscow University Anthropology Bulletin (Vestnik Moskovskogo Universiteta. Seria XXIII. Antropologia), 2023; 3/2023; с. 15-26 (Published: August 23, 2023)