No abstract

There were examined 1 656 young male residents of the Magadan region from among aborigines aged 17-21 y. o., migrants and Caucasoid natives of the Magadan region of the 1st 2nd generations in order to study their morphofunctional parameters. It has been found that among the modern population of the male aborigines and the Caucasoid natives residing under similar natural-climatic conditions, there were observed processes of convergence of some of their physiological parameters. Those processes allowed to consider the phenomenon as a certain stage of convergent adaptation. Moreover, the vector of the change indices’ focus among the migrants and different generations of the Caucasoid natives allows to state formation of a new population that is developing in the Northeast of Russia. We specify this new population as a population of rooted residents who have different functional indices as compared to those of aborigines or migrants.

Natural and climatic conditions of the environment of Northeast Russia and particularly Magadan region are the very factor mostly influencing adaptive responses by individuals inhabiting the region. Compensatory and adaptive responses in indigenes and newcomers of the region can be assumed to have their specific features. In 2009 there was executed the examination of the cardiovascular and respiratory systems and gas exchange in 392 cases aged of 17-19 years, including Europeans (Caucasians) born in the North in the 1st-2nd generation and indigenes. The methodologically similar study was carried out in 2014 in 265 persons, referred to the same cohorts of North-born Caucasians and Indigenes from the Magadan region. The results of the study executed in 2009 testified to a small number of physiological parameters that were reliably different in Caucasians vs. Indigene subjects. In 2014 no difference was found between the two examined cohorts throughout the observed parameters. The revealed changes in gas exchange, external respiration and cardiovascular systems demonstrated by modern young Indigenes of Northeast Russia testified to the fall in the effectiveness of their breathing. All that makes them farther from the classic “polar metabolic type” and their morphofunctional status becomes closer to European male subjects of Northeast Russia. Thus, we can observe a clear tendency towards “convergence in programs” of the adaptive changes between populations of the North residents undergoing similar natural, environmental and social factors.

No abstract

Based on the studies of the parameters of physical development, the cardiovascular system, external respiration, and arterial blood oxygenation observed in the young male residents, all born in the Russian Northeast, a comparative analysis of morphofunctional changes was performed depending on the subjects’ constitutional types. Resulting from that, the pronounced tension was revealed in the work of different systems of the hypersthenic persons. The most effective work of the functional systems was demonstrated by the asthenic persons. Increased quantity of the subjects with this type of constitution was found in the recent years. That corresponded to the general tendency towards a more graceful type typical for modern young males.